Answer:
B - Some organic molecules, including amino acids, could have been produced from chemical reactions on early Earth
Explanation:
The Miller-Urey experiment was a chemical experiment that attempted to recreate the chemical conditions present on early earth, and used these conditions to try to decipher how life on earth came about.
Their experiment showed that simple organic compounds (i.e. amino acids) that represent the building blocks of complex macromolecules (i.e. proteins) could be formed from this experimental set up with the addition of energy. This showed the minimal features required to form life.
The answer is B
Some organic molecules, including amino acids, could have been produced from chemical reactions on early Earth.
(7) How might the Punnett Square below be used as evidence to support the
idea that genetic information is passed onto offspring through meiosis
followed by fertilization?
pollen
o
b
A. When the female gamete for a
purple flower is pollinated with a
male gamete for a purple flower,
the offspring is purple.
B. The Punnett Square shows with
certainty what an offspring would
look like if two organisms produce
offspring
C. The pistil and pollen are diploid
cells and donate two alleles to each
offspring, resulting in the traits for the
organism.
D. The Punnett Square shows the
possible combinations of alleles when
chromosomes replicate from meiosis.
Answer:
C
Explanation:
The pistil and pollen are diploid cells and donate two alleles to each offspring, resulting in the traits for the organism supporting the idea that genetic information is passed onto offspring through meiosis followed by fertilization.
What is fertilization?
Fertilization, often spelled fertilisation and sometimes referred to as generative fertilisation, syngamy, and impregnation, refers to the process of fusing gametes in order to produce a new individual organism or progeny and to kickstart that organism's growth.
During meiosis, a diploid cell divides into two haploid daughter cells, and during fertilization, two haploid daughter cells, known as gametes, join together to form a diploid zygote.
The processes that take place during fertilization can be broken down into four distinct phases: 1) the preparation of the sperm, 2) the recognition and binding of the sperm to the egg, 3) the fusion of the sperm and egg pronuclei, and 4) the activation of the zygote.
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Which of these choices is the primary purpose of the Ramsar Convention
Answer:
As the choices are not given, so let's have a look at the Ramsar Convention in general.
Explanation:
In 1971, different countries around the globe signed a treaty in Ramsar, Iran for the conservation and sustainable usage of different wetlands around the world. The conservation of wetlands is important because the wetlands have a diversified flora and fauna. Destruction of the wetlands would result in many animals and plant species around the world to become extinct or endangered. Hence, this treaty was signed by different countries of the world as an understanding of the current situation of the wet lands.
Answer:
to conserve wetlands
Explanation:
BRAINLIEST PLEASE ANSWER FASTWhich of the following is NOT a way that biodiversity is important to an ecosystem?
A Different types of decomposers are available to break down many types of waste.
B Biodiversity makes ecosystems more stable.
C Biodiversity can increase the rate of extinction.
D If one food source goes extinct other food sources are more likely to be available.
Biodiversity is not important to increase the rate of extinction.
Answer: Option C
Explanation:
Bio diversity is nothing but a measure of variation at the species, genetic, and ecosystem levels. In other words, Bio diversity can be termed as “Totality of species or genes etc.” They always tend or help to make the biodiversity more stable and consistent.
They also play a major role in making food source available if any other food source become extinct. They will never be used to improve the rate of extinction in turn they can only be useful to reduce the rate of extinction. Hence we can conclude option C as correct answer.
Arrange the events of succession after a volcano erupted in their proper order.
a.
pioneer species, plant growth, soil formation
b.
pioneer species, soil formation, plant growth
c.
soil formation, pioneer species, plant growth
d.
soil formation, plant growth, pioneer species
Answer:
answer is b
Explanation:
i have edgenunity or however you spell that
The events of succession after a volcano eruption are described as follows:
Pioneer species, soil formation, plant growth.Thus, the correct option is B.
What is Succession?Succession may be defined as the process of gradual and continuous replacement of one community by another community over a specific period of time. This process generally takes place by strong competitors. "Frederic Clements" is considered as the Founder of succession theory.
After volcanic eruption, the pioneer species is the first species that arrive after this activity. Due to the arrival of pioneer species, soil formation occurs due to the breaking down of rocks into smaller fragments by the action of pioneer species.
Once soil formation occurred, now the stage is set for various plants to grow and developed properly as per their needs.
Therefore, the correct option for this question is B.
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do cells absorb food and oxygen
Answer:
Yes it does.
And could you come help me with my latest question?
Answer:
yes
Explanation:
(answer fast and you'll get brainlest) The solution outside of a cell is a hypertonic sugar-water solution.
Which would typically be the result of osmosis so that a cell may maintain homeostasis?
A. Water moves from the inside to the outside of the cell, causing the cell to swell.
B. Water moves from the outside to the inside of the cell, causing the cell to swell.
C. Water moves from the inside to the outside of the cell, causing the cell to shrivel.
D. Water moves from the outside to the inside of the cell, causing the cell to shrivel.
Answer:B. Water moves from the outside to the inside of the cell, causing the cell to swel
Question 11
1 pts
When a dominant gene is paired with a recessive gene, the characteristic associated with the dominant gene
will be
repressed
mutated
expressed
absent.
Question 12
1 pts
When a dominant gene is paired with a recessive gene, the characteristic associated with the dominant gene will be expressed.
Explanation:
Recessive gene is not expressed when paired with a dominant gene as the alleles of the dominant trait will mask the recessive gene expression. The trait appearing in the offspring will be the dominant type. In other words, the dominant allele would dictate the protein to get appeared in the offspring.
When a dominant gene is paired with a recessive gene, the characteristic associated with the dominant gene will be expressed. The dominant gene hides the effects of the recessive gene, so the observed characteristics will come from the dominant gene.
Explanation:When a dominant gene is paired with a recessive gene, the characteristic associated with the dominant gene will be expressed. This is based on the principles of biology and genetics. The dominant gene masks or hides the effects of the recessive gene in the offspring. Hence, the characteristic that will be visible in the organism will be of the dominant gene. For instance, in humans, brown eye color is dominant over blue. Therefore, a person with a dominant gene for brown eyes and a recessive gene for blue eyes will have brown eyes.
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The table represent the thickness top density and bottom density of the different layers of the earth. In most of the layers, the deeper the layer, the thicker and denser the layer becomes. At which location in Earth’s interior exhibits a change in the trend?
Answer:
Inner Core is the answer.
Answer:
a
Explanation:
Gene therapy is a form of
selective breeding
artificial selection
cloning
genetic engineering
Answer:
Genetic Engineering
Explanation:
Genetic engineering aims to modify the genes to enhance the capabilities of the organism beyond what is normal.
Answer:
genetic engineering
Explanation:
How many grams of CaCl2 are in 0.75M solution with a volume of 1L
83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.
Explanation:
Molarity or molar concentration is the number of moles of solute that can be dissolved in 1 L of a solution.
let us find the number of moles
n=C*V Concentration is 0.75M
Volume is 1000ml.
n= 0.75*1
n= 0.75
This means there are 0.75 moles of CaCl2 in 1000 ml of solution of .75M.
Molar mass of CaCl2 is = 40.08+ 2(35.5)
= 110.98 gms
Thus 1 MOLE OF CaCl2 weighs 110.98
so 0.75 moles will weigh 110.98*0.75
= 83.235 grams of CaCl2 is required to make 1 litre of 0.75M solution.
What is happening during the stage of meiosis shown below?
O
A. The spindle fibers are pushing the sister chromatids toward the
center of the cells.
O
B. The spindle fibers are pulling the sister chromatids apart to
opposite sides of the cells.
O
C. The spindle fibers are pushing the tetrads toward the center of the
cells,
O
D. The spindle fibers are pulling the tetrads apart to opposite sides of
the cells.
B. The spindle fibers are pulling the sister chromatids apart to oppositesides of the cells.
Explanation:
In meiosis, a single cell is dividing two times and forming four different haploid cells (n). Meiosis will produce gametes( sperms and eggs) through sexual reproduction. Meiosis has two cell division stages. In meiosis one, which is the first round of cell division where the homologous chromosomes ( they are pair of chromosome from the parents but each allele are different since both are coming from mother and father) but are separating each other.In meiosis two, which is the second round of cell division where the sister chromatids ( Identical copies of chromatids formed after the DNA replication) get separate each other by spindle fibres).is gas powered lawn mower a simple machine
Answer:
A gas-powered lawn mower is a complex machine because for it to function it does more than one motion. For example, it has a wheel and axle system so it can move when powered. And it has a system of simple machines and other parts that are put together to accomplish the task of cutting grass.
Explanation:
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Answer:
Island Arcs
Explanation:
How would you argue that viruses are not living things?
Answer:
Viruses cannot replicate on their own, they need a host cell to replicate their own cells. Since they cannot replicate their cells on their own, they are not living. They also do not consume energy like all living things nor do their maintain homeostasis (maintaining a stable inside environment) or more specifically, regulate their own temperature.
The characteristics that result from a monohybrid cross is the trait
Answer:
The characteristics that result from a monohybrid cross is the dominant trait.
Explanation:
A monohybrid cross is the process of mating between organisms having contrasting variants at one particular genetic chromosome.The characters that is being observed in a monohybrid cross are controlled by two or more than two variations for a unit locus. The result that is obtained form the monohybrid cross is never a recessive trait but always found a dominant trait.Dominant trait is the masked or hidden genetic characteristic of organism by the recessive one.Answer:
The characteristics that result from a monohybrid cross is the dominant trait.
Explanation:
A monohybrid cross is the process of mating between organisms having contrasting variants at one particular genetic chromosome.
The characters that is being observed in a monohybrid cross are controlled by two or more than two variations for a unit locus.
The result that is obtained form the monohybrid cross is never a recessive trait but always found a dominant trait.
Dominant trait is the masked or hidden genetic characteristic of organism by the recessive one.
how does artificial selection benefit the environment
Answer:
1. provides improvements to the plants and animals
2. can create new plants and animals
Explanation:
Primary growth or lengthening of plants results from mitotic division in cells of which tissue?
A.
Axillary buds
B.
Lateral meristem
C.
Apical meristem
Answer:
The correct option is C) Apical meristem
Explanation:
Apical meristem can be described as undifferentiated meristematic cells found in the tips of the shoots and roots. The main function of the apical meristem is to start the process of cell division at these parts. In the apical meristems, cells tend to grow by undergoing numerous mitotic divisions. As result, primary growth and lengthening of the plant occur. Hence, the correct option is option C.
Other options, like option B, is not correct because it is the site where secondary growth occurs.
In England, peppered moths have two color forms, light and dark. Dark is a dominant trait. Until about 1850, the majority of
moths in England were light colored. With the beginning of the Industrial Revolution in the late 1800's, the moth population
began to change color. The majority of the moths were dark by the 1920's. How can this be explained genetically?
Theory of natural selection by Charles Darwin explains the moth appearance in England. The theory of genetics describes this as a mere shift of trait due to environmental factors.
Explanation:Peppered moths are the moths found in England from a long time ago. The environment before the industrial revolution was pure and pollution free, which led to the growth of the white variety of moths as they were able to camouflage better with the bark of the trees from their hunters. The white trait were the parents, and fertilization between the two recessive traits gave rise to the recessive traits only.
But with the industrial revolution, the pollution increased to a huge extent, leading to deposition of smokes and soot on trees bark where white variety of the white moths got easily recognizable. This led to the black moths which now can camouflage better. Thus the nature selected black variety over white variety for better survival, and the white variety reduced dramatically.
Answer:
B) As light colored moths were seen and eaten, the allele frequency for dark color became more prevalent in the population
Explanation:
Which of the following best explains why the latitude of a region influences its climate?
A. The latitude of a region determines its proximity to the ocean.
B. The latitude of a region determines the landforms present in the area.
C. The latitude of a region determines how much sunlight the area receives.
D. The latitude of a region determines its elevation above sea level.
Answer:
"The latitude of a region determines how much sunlight the area receives" this statement says about why the latitude of a region influences its climate.
Explanation:
The latitude determines the sunlight of the area receives because, the more the latitude the sharper will be angle of the sun's rays which will reach the surface. Means that the rays of the sun are being spread over the broader area. Hence, More the latitude receive will be the less than the lower latitude areas located nearer to the equator. As, we know the sun's ray first strikes over the Earth's surface which is near the equator as these places receive direct solar radiation. At greater latitude the solar radiations gets spread in more area and hence the temperature also reduces.
Answer:
C. The latitude of a region determines how much sunlight the area receives.
Explanation:
Did it on Study Island, plus latitude determines how close it is to the equator and therefore how directly it gets hit by the sun.
Please select the word from the list that best fits the definition
The stress force that pulls on the crust where two plates are moving apart is called
syncline
anticline
footwall
hanging-wall
tension
shearing
strike-slip
reverse
Answer:
5, E, Tension
Explanation:
Answer:
e
Explanation:
have a good day
Which part of an atom is actively exchanged or shared in a chemical bond?
proton
electron
neutron
depends on the type of atom
NEXT GESTION
O
ASK FOR HELP
Answer:
a ELECTRON (lol)
The part of an atom that is actively exchanged or shared in a chemical bond is ELECTRON.
Answer:
The part of an atom that is actively exchanged or shared in a chemical bond is ELECTRON.
Explanation:
Domestic cattle often have interactions with wild animals. In South America,
drink the blood of sleeping cattle. Disease may spread through these bites. Howeve
blood does not cause great harm to the cattle. In North America, wolves sometimes a
etimes attack and
eat young cattle.
vild animals. In South America, vampire bats
through these bites. However, loss of
a. What are the names of these two interactions with cattle, and how do they differ from
each other? (1 point)
In which situation are cattle hosts?
Answer:
Bats are the only mammals that can fly, but vampire bats have an even more interesting distinction—they are the only mammals that feed entirely on blood.
Nocturnal Behavior
These notorious bats sleep during the day in total darkness, suspended upside down from the roofs of caves. They typically gather in colonies of about 100 animals, but sometimes live in groups of 1,000 or more. In one year, a 100-bat colony can drink the blood of 25 cows.
During the darkest part of the night, common vampire bats emerge to hunt. Sleeping cattle and horses are their usual victims, but they have been known to feed on people as well. The bats drink their victim's blood for about 30 minutes. They don't remove enough blood to harm their host, but their bites can cause nasty infections and disease.
Hunting for Blood
Vampire bats strike their victims from the ground. They land near their prey and approach it on all fours. The bats have few teeth because of their liquid diet, but those they have are razor sharp. Each bat has a heat sensor on its nose that points it toward a spot where warm blood is flowing just beneath its victim's skin. After putting the bite on an animal, the vampire bat laps up the flowing blood with its tongue. Its saliva prevents the blood from clotting.
Young vampire bats feed not on blood but on milk. They cling tightly to their mothers, even in flight, and consume nothing but her milk for about three months.
The common vampire bat is found in the tropics of Mexico, Central America, and South America.
Hope it helps!
Answer:
The wolf attacking and eating young cattle would be an example of predation. The bat drinking the the blood of sleeping cattle would be commensalism, since the cow is unaware and the bat is benefiting.
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Which statement about electrons is true?
A. Electrons have no charge.
B. Electrons have a positive charge.
C. Electrons have a negative charge.
Answer:
it is c as protons have a positive charge
Explanation:
protons =positive
Which of these is an example of thermal pollution?
O
A. Water carries radioactive particles from a deposit of radioactive
matter.
O
B. Lake water is used for cooling in a power plant.
O
C. Fertilizers run off into nearby waterways.
O
D. Soil washes off plowed fields into nearby waterways.
(Apex)
Lake water is used for cooling in a power plant is an example of thermal pollution
Explanation:
When a body of water is heated to an abnormally huge temperature in a manufactured manner by humans there expires thermal pollution. Due to the outflow of heated water from manufacturing processes there raises in liquid warmth in a water body.
A usual problem of thermal pollution is the effectiveness of the pool as a cooling agent by power plants and manufacturing units. When the liquid used as a cooling agent is delivered to the tangible atmosphere at a tremendous temperature, the unexpected variation in warmth reduces oxygen stocks and concerns ecosystem balance.
Answer:
Lake water is used for cooling in a power plant is an example of thermal pollution
Explanation:
AP!X
Which of these events happens immediately before cell division occurs? A. The cells genetic material is copied
B. The cells surface area to volume ration increases
C. The cells volume decreases more than its surface area
D. The cells DNA is distributed evenly throughout the cell
Answer:
A The cells genetic material is copied
Explanation:
Cell division is the process by which a single cell divides into two daughter cells. Each daughter cell needs to inherit an entire copy of the genetic material, therefore, before cell division occurs, the DNA is replicated. This allows the cell to divide the genetic material between two daughter cells, such that each cell inherits the complete genome.
Final answer:
DNA replication, which occurs during the S phase of the cell cycle, happened immediately before cell division. The incorrect event during interphase is the separation of sister chromatids, which occurs during anaphase of mitosis. DNA replication is vital for genetic continuity in the daughter cells.
Explanation:
The event that happens immediately before cell division occurs is A. The cell's genetic material is copied. This process is known as DNA replication and occurs during the synthesis phase, or S phase, of the cell cycle, before the cell enters mitosis or meiosis. DNA replication ensures that each daughter cell will have its own complete set of chromosomes, which is essential for maintaining the genetic continuity of an organism.
To answer the multiple-choice question provided, the event that does not occur during some stages of interphase is D. separation of sister chromatids. This event happens during mitosis, specifically during anaphase, which is after interphase has concluded.
Thus, DNA replication is the critical step that precedes cell division, guaranteeing that all genetic information is successfully and equally distributed to the two new cells.
Which of these would improve the water quality in a watershed? A. reduction in pesticide use B. use of more fertilizer C. destruction of wetlands D. erosion of more topsoil
Answer:
A
Explanation:
Reducing pesticide use, preserving wetlands, and preventing erosion of topsoil would all improve the water quality in a watershed.
Explanation:Improving water quality in a watershed can be achieved through various methods:
Reducing pesticide use: Pesticides can contaminate water sources, so reducing their use helps prevent water pollution.Not destroying wetlands: Wetlands act as natural filters, removing pollutants and improving water quality. Destruction of wetlands can lead to increased pollution in the watershed.Avoiding erosion of topsoil: Erosion can carry sediment and pollutants into water bodies, degrading water quality. Preventing topsoil erosion helps maintain clean water in the watershed.Learn more about Water quality in a watershed here:https://brainly.com/question/32173599
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describe how negative feed back would work to maintain body temperature, blood glucose and blood ph
Answer:
These conditions remain stable because of physiologic processes that result in negative feedback relationships. If the blood glucose or calcium rises, this sends a signal to organs responsible for lowering blood glucose or calcium. The signals that restore the normal levels are examples of negative feedback.
Explanation:
What branch of earth science studies the Great Lakes
Answer:
Oceanology or oceanography
Explanation:
Oceanology or oceanography can be described as a branch of Earth Science under which The physiological and biological aspects of the Great Lakes and Oceans are studied. This branch of Earth Science is further divided into many branches such as oceanography, chemical oceanography, geological oceanography and physical oceanography so that every aspect of the oceans can be studied in detail. The field of Oceanology is dynamic and versatile.
Which of the following are appropriate units for power?
Question: Which of the following are appropriate units for power?
A) newton·meter
B) watt
C) H.P./sec
D) joule/sec
Answer:
Watt and Joule/sec are the appropriate units for power.
Explanation:
As per the question, the physical quantity given is power.
The power is defined as the rate of consumption of energy or the rate of doing work.
Let us consider W is the amount of work done by a body in time t .
Mathematically the power of that body is written as -
power [tex]p = \frac{W}{t}[/tex]
The unit of work is joule and the unit of time is second.
Hence, the unit of power is joule/sec.
we know that one joule/sec. = one watt.
Hence, watt is also another unit of power. Newton-metre can not be a unit of power . It may be considered as a unit of work.
Similarly H.P/sec is also not a unit of power. Here H.P stands for horse power which is another unit of power . Hence, joule/sec. and watt are the appropriate units of power.
The SI unit for power is the B) watt (W)
Another common unit for power is horsepower (hp), where 1 hp equals 746 watts.
These units allow you to measure and compare the power of different devices effectively.In physics, power is defined as the rate at which work is done or energy is transferred over time. The SI unit for power is the watt (W), where 1 watt is equal to 1 joule per second (J/s). Another commonly used unit for power, especially for engines and motors, is the horsepower (hp), where 1 horsepower is equal to 746 watts. By understanding these units, you can better grasp and compare the power ratings of different devices and systems.In summary, the appropriate units of power include:
Watt (W)Horsepower (hp)Correct question is: Which of the following are appropriate units for power?
A) newton·meter
B) watt
C) H.P./sec
D) joule/sec
Which option identifies ways that people positively affect Earths resources
People can affect Earth's resources positively by using technology to improve resource efficiency, enacting and following laws pertaining to reduce, reuse, and recycle, and choosing to support environmentally responsible companies. A shift towards valuing natural harmony and sustainability in our lifestyles is also crucial. All human activities should be evaluated with long-term ecological sustainability in mind.
Explanation:People positively affect Earth's resources through a variety of methods that demonstrate sustainable ecological practices. By using technology to improve the efficiency of resource use, humanity supports a growing population while minimizing waste. The implementation of laws that enforce the principles of reduce, reuse, and recycle help conserve resources and reduce pollution. Moreover, individuals have a powerful voice in shaping the market; by voting with their wallets, they can encourage companies to adopt more environmentally friendly practices.
Furthermore, a shift in collective consciousness is vital. Embracing a lifestyle that values natural harmony above exploitation can lead to the conservation of resources and the safeguarding of the environment for future generations. Activities that might extend human lifespans, like curing diseases, would need to be balanced against sustainable practices to avoid increasing the overall demand on Earth's finite resources. Hence, all proposed activities should fall within a sustainable framework that ensures long-term human success and happiness.
The preservation of Earth's resources also involves recognizing that humans share these resources with other living things. Accepting that unrestrained growth is not sustainable, and that humanity is a part of nature, underpins the efforts to maintain the balance required for a healthy planet.
The option that identifies ways that people positively affect Earth's resources is: C. Build dams, use cars that emit fewer harmful gases, and halt the runoff of factory waste into rivers and streams.
Build Dams:
Constructing dams can have positive impacts on Earth's resources by providing a means of water storage and regulation. Dams can help control water flow, prevent flooding, and store water for various uses, including agriculture, drinking water, and hydroelectric power generation. Properly managed dams contribute to water resource sustainability.
Use Cars that Emit Fewer Harmful Gases:
Choosing vehicles with lower emissions is an environmentally friendly practice. Vehicles that emit fewer harmful gases contribute to improved air quality and help mitigate the negative effects of air pollution on human health and the environment. Transitioning to cleaner and more fuel-efficient transportation options reduces the environmental impact associated with traditional combustion engine vehicles.
Halt the Runoff of Factory Waste into Rivers and Streams:
Preventing runoff of industrial waste into water bodies is essential for preserving water quality and protecting aquatic ecosystems. Proper waste management and the implementation of pollution control measures at industrial facilities help reduce the contamination of rivers and streams, benefiting both the environment and the organisms relying on these water sources.
Overall, option C advocates for practices that promote sustainable water management, reduce air pollution, and prevent water pollution, contributing to positive impacts on Earth's resources. These actions align with environmental conservation principles and aim to mitigate the adverse effects of human activities on the planet.
Complete question:
Which option identifies ways that people positively affect Earth's resources?
A. Use cars that emit fewer harmful gases, build dams, and stop using all resources
B. Stop using all resources, increase mining efforts, and halt the runoff of factory waste into rivers and streams
C. Build dams, use cars that emit fewer harmful gases, and hat the runoff of factory waste into rivers and streams
D. Increase mining efforts, build dams, and use cars that emit fewer harmful gases