Ways to recover grassland ecosystem after volcanic revolution:
The volcanic eruption destroys a grassland ecosystem. They burns the place and the plants. The dusts cover up the leaves and the heat kills the seeds and spores of the plants. The recovery isn’t easy and fast.
As the volcano lava cools and subsides, the new vegetation starts to grow. The seeds are brought by the wind, birds and other animals that are spread over the landform. The rain provides the necessary water for germination. Volcano supplies the necessary minerals that are very good for plant growth.Thus the grassland ecosystem again revives from the devastating hands of the volcano.
Final answer:
The grassland ecosystem can recover from a volcanic eruption through primary succession starting with lichen growth, followed by the establishment of pioneer species such as annual plants and grasses, and eventually leading to the return of intermediate species like shrubs and small trees, culminating in the development of a climax community.
Explanation:
After a volcanic eruption, the grassland ecosystem can recover through a natural process known as succession. During this process, the area may experience several stages of recovery:
Primary succession, which occurs in lifeless areas where soil has to be created. This typically involves the growth of lichens and microorganisms that help in the breakdown of rocks into nutrient-rich soils.
Pioneer species like grasses and annual plants are usually the first to grow back. These species are important for stabilizing the soil and providing organic material as they die and decompose, thus enriching the soil further.
Over time, intermediate species such as shrubs and small trees like pine, oak, and hickory will establish themselves, building upon the changed environment and paving the way for a diverse ecosystem.
As the soil quality improves and the ecosystem matures, it will transition to a climax community, remaining relatively stable until the next disturbance.
A caterpillar represents which stage in the life cycle of an insect?
A. Pupa
B. Larva
C. Adult
D. Egg
Answer:
B
Explanation:
Answer: B. Larva
Explanation: I took the test
What are building blocks of lipids
Answer:
Explanation:
One glycerol molecule and at least one fatty acid, with a maximum of three fatty acids. Glycerol is a sugar alcohol with three OH groups.
The building blocks of lipids are:
One glycerol molecule and at least one fatty acid, with a maximum of three fatty acids. Glycerol is a sugar alcohol with three OH groups.
The mass of a star can be determined by studying _____.
binary star systems
the wavelength of light emitted by the star
the distance between the star and Earth
the color of the star
Answer:
The mass of a star can be determined by studying binary star systems.
Explanation:
In this system it consists of two stars, revolving round the same bary-centre. The systems having two or may say more than two are called as the multiple star system. This zone is also a habitable zone, here the water exists in the liquid form. We could have sometime seen the two stars together. They are also very capable of strengthening the terrestrial planets inside the stable orbital ranges. They have generally two orbits like P-type as well as circumbinary.
Sulfur dioxide emitted from power plants eventually causes acid rain in the atmosphere. Which term best describes acid rain?
A. Primary and secondary pollutant
B. Secondary pollutant
C. Greenhouse gas
D. Primary pollutant
Answer:
B. Secondary pollutant
Explanation:
Answer:
B. secondary pollutant
Explanation:
i just took the test it was right!
Multiple choice: Which of these best describes how the theory of plate tectonics explains the formation of a deep-sea trench?
a) oceanic plates are diverging
b) a plate is moving over a hot spot in the mantle
c) continental plates are converging
d) an oceanic and continental plate are converging
Answer:
D. Oceanic and continental plate are converging
Explanation:
Trenches are formed when two tectonic plates converge (move towards each other), specifically, when an oceanic plate and a continental plate converge. The oceanic plate is denser and heavier than the continental plate and when they converge, the oceanic plate is pushed under the continental plate. The plate bends beneath the lighter plate and it creates that v-shaped depression. This process where one plate goes beneath the other is called subduction and the boundary where they collide is called a subduction zone.
W
Which statement is true about the excretory system?
HTC
COS
O
A. The bladder has two urethras.
B. Each bladder connects to a ureter.
O
C. The kidneys contain villi.
O
D. The kidneys contain nephrons.
SUBMIT
Answer:
The correct option is D) The kidneys contain nephrons.
Explanation:
Option D is correct because each kidney comprises of millions of filtering units which are called nephrons. The nephrons contain the glomerulus and tubule. The glomerulus is involved in the filtration of the blood whereas the tubules transport the useful substances back to the blood and help in getting rid of waste material.
Other options like option B is false because the bladder does not connect the ureter. Each ureter connects the bladder to the kidneys of each side.
Answer:
D the kidneys contain nephrons
Explanation:
which microorganism present in the intestine of human and animals help in the synthesis and digestion of variety of foods ( please reply )
Answer:
Gut microflora is a combination of many different kinds of bacteria. Out of these, Lactobacillus bacteria, specifically, Lactobacillius acidophilus and Lactobacillus bulgaricus primarily help in the digestion of the milk sugar lactose. Probiotic bacteria in the gut microbiota, primarily, Lactobacillus and Bifidobacterium help in the synthesis of vitamins.
Explanation:
Gut Microbiota:
Gut microbiota are the microorganisms that live inside the gastrointestinal tract and aid in various body functions. Also called commensal flora, many of these help in digestion and biosyntheisis of vitamins.
Lactobacillus species are a predominant component of gut microbiota. Lactobacillus produces an enzyme called lactase that breaks down lactose sugar in milk. Complex sugars in vegetables and fruits are broken down, mostly, by gut microbiota.Probiotic bacteria, Lactobacillus and Bifidobacterium species aid the biosynthesis of various vitamins and nutrients such as:Vitamin K and most of the water‐soluble B vitamins, such as biotin, cobalamin, folates, nicotinic acid, panthotenic acid, pyridoxine, riboflavin, and thiamine.6. color blindness is a sex-linked recessive disorder on the X chromosome. If the allele "b" is used to
denote color blindness, circle the genotype(s) that correctly represent(s) a female that is color blind.
BB
Bbbb
XX3
Xpy
Xoxo
YBy
color blindness is a sex-linked recessive disorder on the Y chramanma 16 thullalni
.
Answer:
XᵇXᵇ
Explanation:
The X chromosome is the female sex chromosome and when you have a pair of X chromosomes (XX), then that would denote that the subject is female. Now when it comes to x-linked traits, for a female to be affected, she would have to have the allele on both chromosomes, or in this case, homozgous for color-blindness. (If it is found only on one, she would be a carrier, but she won't be affected.)
So the answer would be: XᵇXᵇ
Final answer:
The correct genotype for a colorblind female is XbXb, which consists of two X chromosomes with the recessive 'b' allele. None of the genotypes listed in the question accurately represent a colorblind female.
Explanation:
Color blindness is a sex-linked recessive disorder on the X chromosome. For a female to be color blind, she must have two copies of the recessive allele "b" on each of her two X chromosomes. Therefore, the correct genotype that represents a colorblind female would be XbXb. None of the genotypes listed in the question (BB, Bbbb, XX3, Xpy, Xoxo, YBy) correctly represent a colorblind female. A colorblind female's genotype should consist of two X chromosomes, both carrying the recessive "b" allele.
1) How is DNA condensed to form a chromosome?
2) What is the difference of mechanism genes and the DNA
segments between them?
3) What is the difference between a gene expression and the
genetic code?
(Will give brainliest if answered correctly)
Appetite is controlled by which hormone?
epinephrin
testosterone
estrogen
ghrelin
Answer:
Explanation:
Ghrelin
produced and released mainly by the stomach with small amounts also released by the small intestine, pancreas and brain
Appetite is controlled by ghrelin
carbon__is produced as ____.some and _____relase carbon dioxide as waste.
Answer:
Carbon dioxide is produced as hydrocarbon. Some and glucose release carbon dioxide as waste. I'm not positive this helps, but hope this help.
Explanation:
6. Applying Concepts Liza rode her bike to the
store. She bought items that had little packag-
ing and put her purchases into her backpack.
Describe how Liza practiced conservation.
7. Identifying Relationships How does conser-
Answer:
Liza bought things that had little packaging. She practised conservation through this as the less packaged items would not have been sold and hence would have gone to waste.
Liza did not use a plastic bag to put her bought items. Instead, she used her backpack. In this way, she practised conservation by not using a plastic bag. Also, plastic bags are hard to dispose of and are not degradable.
If the earth were not tilted in its orbit how would the climates and seasons be affected at the equator and between 30 north and south latitudes
Answer:
There would be one season (summer), and it would be always hot
Explanation:
What causes climates and seasons is the tilted orbit of Earth, this is caused by sunlights which come to Earth with different angles all over the Earth. The last palce to get sunlight with 90 degrees are 23 degrees 27 minutes N and S latitudes. When sunlight comes directly to the Earth longtitude between 30 N and S would get sunlights with 90 degrees all year.
Final answer:
Without the Earth's 23.5° tilt, climates at the equator would remain consistently tropical, while regions between 30° north and south latitudes would experience less pronounced seasonal changes with milder temperatures year-round.
Explanation:
If the Earth were not tilted in its orbit, the climates and seasons at the equator and between 30° north and south latitudes would be significantly affected. Instead of experiencing varying seasons, these areas would likely experience a more uniform climate throughout the year. At the equator, where the sun is always high in the sky, there would be very little change in the amount of solar radiation received during the year, resulting in a consistently tropical climate. Between 30° north and south latitudes, variations in temperature and day length over the course of the year would be much less pronounced than they are now. As a result, the seasonal changes we currently experience, characterized by significant shifts in temperature and weather patterns, would be greatly reduced or even non-existent.
The Northern Hemisphere experiences winter when it is tilted away from the sun, leading to more reflected sunlight and less absorption of the sun's energy. Without the Earth's tilt, this phenomenon would not occur, and thus the stark contrast between summer and winter temperatures would be diminished, making for milder seasons. Overall, with a non-tilted Earth, the concept of seasons as we know it would be altered dramatically, leading to a very different climate pattern across the globe.
Which features of lungs can be adjusted for different conditions, such as cold or humidity?
Answer
Lungs - "The human body posses to similar structures for inhalations and exhalation of air in the body". As lungs are in a pair and has the capacity of about 5 liters in total".
When the lungs face cold or humid air they operate as follows.
Explanation:
Releasing Histamine
lungs when faces cold air it release the chemical histamine in it so it can contract the soft muscle and contract the air ways.
Humidifying the air
As the human body has an inbuilt system to humidify the air up to 100 percent and 96' F in temperature for better operation.
A student wants to view a cell’s mitochondria. Which of the following microscopes would show a mitochondria’s internal structure in the greatest detail?
Answer:
Transmission Electron Microscope would show a mitochondria’s internal structure in the greatest detail
Explanation:
The TEM is used to visualise the internal structure of the cells. This works when an electron beam of light passes through the object or the sample, it shows a clear presence of the organelles inside the cell. The TEM uses the energetic electron which provides the morphological as well as compositional and crystallographic features of the cell. Its maximum potential is about 1 nanometre. Among the most powerful microscope for studying the internal organelles of the cell TEM is one.
The electron microscope would show a mitochondria's internal structure in the greatest detail.
Explanation:The microscope that would show a mitochondria's internal structure in the greatest detail is an electron microscope. Electron microscopes use a beam of electrons instead of light to magnify the image, allowing for higher resolution and greater detail. With electron microscopy, scientists have been able to observe the intricate inner structure of mitochondria, including the cristae and matrix.
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The Hershey-Chase experiment disproved which of these molecule groups as the physical carrier of inheritance?
proteins
nucleic acids
lipids
polysaccharides
Answer:
In Hershey -Chase experiment , they proved the physical carrier of inheritance is nucleic acids not proteins.
Explanation:
Hershey- Chase has proved genetic material is DNA. They experimented on Bacteriophage which are made of proteins and DNA. For this experiment they used radioactive isotopes of element. Phosphorous-32 was used to label the DNA and sulfur -35 was used to label amino acids in proteins.
They found in experiment shortly after attacking on bacteria phage adhere on the surface, inserts its DNA into the host , leaving its protein coat outside. As they did not find any trace of sulfur-35 in the test medium.
after entering host body phage DNA multiplied in several copies. And after that they packed and assembled in protein coat.
After this experiment they concluded that DNA is the physical carrier of inheritance.
Describe the importance of conservation and how it will affect the future.
Answer:
Conservation is the care and protection of these resources so that they can persist for future generations.
Explanation:
It includes maintaining diversity of species, genes, and ecosystems, as well as functions of the environment, such as nutrient cycling. ... Declining biodiversity is closely intertwined with species extinction.
Conservation is essential in maintaining biodiversity and mitigating the negative impacts of climate change. It initiates changes in societal behavior and values, demanding sustainable practices that positively influence the environment and future generations. The conservation movement has helped preserve natural landscapes, but the increasing trend of urbanization poses new challenges.
Explanation:Conservation plays a critical role in protecting biodiversity. It is through conservation efforts that 11 percent of the Earth's land surface is currently protected. The science of island biogeography guides the design of preserves optimally, but their effectiveness is susceptible to political, economic, and environmental changes, especially climate change.
Various organizations, notably non-profits, contribute significantly to conservation. For instance, The Nature Conservancy uniquely focuses on buying land to set up ecosystem preserves. Unfortunately, the growing trend of urbanization disconnects people from natural environments, negatively impacting the value placed on biodiversity.
Changes necessitated by conservation will transcend multiple facets of life, including health, resource use, climate, and cultural values. The conservation movement began in the 19th century when the impact of human settlement and natural resource exploitation on wildlife and environments became apparent. Efforts, mainly motivated by sporting and recreational concerns, were instituted to preserve natural ecosystems and are still influential today, as seen in protected areas like Yellowstone and Yosemite National Parks.
In conclusion, conservation not only safeguards our current biodiversity but also determines the quality and sustainability of life in the future. It implores changes in societal behaviors and values for more sustainable practices outside of preserves, underscoring the need for greater conservation education and awareness.
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There are mountain ranges in the middle of the ocean floor. Because of the higher elevation gravity pushes down on the edges of the plates. This is called ____.
ridge push
slab pull
There are mountain ranges in the middle of the ocean floor. Because of the higher elevation gravity pushes down on the edges of the plates. This is called ridge push.
Explanation:Ridge push is a simple explanation of the height of the landforms based on the gravity and the elasticity of the underlying rock. It says when a landform gets too much higher, the weight of the overlying rock and soil pushes the landform back to plains. Thereby an equilibrium is maintained.
Slab pull is a theory proposed which visualizes the earth interior as a pool of hot molten lava that has a convection current going on. It explains why the crust of the earth continuously moves slowly and forms mountains and other rift valleys.
Which of the following describes organelle structures that plant and animal cells have in common?
Answer: nucleus, Golgi complex, endoplasmic reticulum, ribosomes, mitochondria, peroxisomes, cytoskeleton, and cell (plasma) membrane
Explanation:
Answer:
The options:
A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.
B) They both have a central vacuole that stores water and food and mitochondria that releases energy from glucose molecules.
C) They both have chloroplasts where conversion of light to chemical energy occurs and a cell membrane that serves as a selective barrier for the cell.
D) They both have a cell wall that provides protection and support and a nucleus where DNA is stored.
The CORRECT ANSWER IS A)
A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.
Explanation:
A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.✔✔✔
Judging from a model of the animal and plant cells, one can infer that ribosomes and cell membranes can be found in them.
B) They both have a central vacuole that stores water and food and mitochondria that releases energy from glucose molecules.❌
Animal cells lack central vacuole that stores water and food. Even if the vacoules are present in some, it's going to be small in size which is unlike that of plant cells that as a central vacuole that stores water and food.
C) They both have chloroplasts where conversion of light to chemical energy occurs and a cell membrane that serves as a selective barrier for the cell.❌
Animal cells lack chloroplasts due to the fact that they don't undergo photosynthesis. Animal cells obtain energy via metabolism of the nutrients it derives from food.
D) They both have a cell wall that provides protection and support and a nucleus where DNA is stored.❌
Animal cell lack the presence of a cell wall. The Animal cell is built mainly of cellulose, a type of carbohydrate, that serve as a means of protection to the cell.
HELP PLEASE
a scientist wanted to find out if the amount of plant food affects the number of beans produced in bean plants. How would she label the y-axis?
A. the height of the plant
B. the number of beans produced
C. the amount of water
D. the amount of food
Answer:
Amount of food. She needs to varry the amount of plant food among the different groups so that she can tell how the amount of plant food affects number of beans produced.
Two scientists in British Columbia are counting trout spawning grounds (called redds) along 5 km of a stream. The presence of
milky-colored fish spawn indicates a redd. The scientists walk together, surveying the same areas. What is the most likely reason
for them to count different numbers of redds?
The most likely reason for the scientists to count different numbers of redd is the observer’s efficiency.
Explanation:
In a field survey based on visual counting for visual stock assessment, the scientists may count a different number of redds each time in the same area due to the observer’s or the scientist’s efficiency.
The same place may first appear as redd and then later may not and accordingly the scientist's count also varies.
This error happens due observer’s inexperience in surveying, misidentification of redd species, changes or variations each time in the redd habitat, survey life, characteristics, spawning shifts etc., and poor temporal and spatial coverage.
Answer:
A) Some places look as if they might or might not be redds, and different scientists identify them differently.
What is the role of cyclin-dependent kinases in the cell cycle?
Question 5 options:
They stop the cycle if something has gone wrong.
They catalyze the condensation of the chromosomes.
They provide the energy for the actions of the spindle fibers.
They initiate various stages of the cell cycle.
Answer:
They initiate various stages of the cell cycle.
Explanation:
Cyclins and cyclin-dependent protein kinases function to control the cell cycle. A group of cyclins: the G1 cyclins, are synthesized during G1 phase and function to activate CDPKs which initiate DNA synthesis at the G1/S checkpoint. The cell fails to progress to S phase if there is no sufficient synthesis of G1 cyclins. After a cell passes through this point, the G1 cyclins are degraded, allowing for another group of cyclins: the M cyclins to be synthesized. M cyclins activate a second group of CDPKs which allow the cell to pass the G2/M control point and into mitosis.
A woman is heterozygous for a rare dominant autosomal genetic disease, Neurofibromatosis. She marries a normal man (homozygous recessive for Neurofibromatosis), who has Red-Green Color blindness, an X-linked recessive trait. They have children. What is the chance they will have a girl with Neurofibromatosis?
A. 25%
B. 0%
C. 50%
D. 100%
Answer:
A. 25%
Explanation:
The chance of getting a girl is 50%
The chance of getting a child with Neurofibromatosis is 50%
Multiply the two to find the chance of a girl getting the condition = 25%
I NEED HELP PLEASE AND THANK YOU
Students interested int the development of plants designed an experiment to test germination in different types of seeds. They placed 2 pumpkin seed, 2 radish seeds, and 2
zucchini seeds on damp filter paper in 3 different petri dished and observed the dishes for several weeks. The water on the filet paper was slightly acidic in the pumpkin dish,
neutral in the radish dish, and slightly basic in the zucchini dish. Each dish was kept at a different temperature. After several weeks of data collection, the students had a
difficulty coming to a conclusion.
Using complete sentences, please answer the following questions:
a. What errors did the students make in designing this experimental procedure?
b. How could this procedure be changed to make this experiment valid?
Answer a)
The students should only have changed one variable to test for germination of seeds. They should have just changed the seed types and rest all factors like temp, pH should be kept constant for all of them.
Answer b)
The procedure could be changed as follows. The students should place three of each types of seeds in the petri dish. They should keep all the conditions like nutrients, temperature, pH constant for all the three dishes. After this observations should be made to check which seed germinates faster.
Phylogenetic classification does not tell important information about the organism's history.
Answer:
The phylogenetic classification does not tell important information about the organism history rather tells us about the evolutionary history.
Explanation:
This type of classification helps in identification of the groups, identity and through this proper naming can be done . By this similarities in the Genetic structure can also be seen i.e. in the DNA and RNA, their adaptations and also the embryonic development. hence it provides the important information about the evolutionary history. Thus helping in understanding the relationships and evolutionary process easily by the means of phylogenetic classification.
If you were studying the causes of cancer, which topic might interest you?
Question 15 options:
cyclin-dependent kinases
centromere structure
spindle-fiber structure
cell membranes
Answer:
If you were studying the causes of cancer, the topic that might interest you is cyclin-dependent kinases.
Explanation:
Mutation in the proteins can be a one of the most serious cause for the cancer, mutation will occur in the protein that leads to the regulation of the cell cycle, among those one is cyclin dependent kinases. These enzyme will be more useful for starting the understanding the cause of the cancer. These CDKs are found to be involved in the regulation of the transcription, mRNA processing and also in the differentiation of the nerve cells.
The largest virus is about the same size as the smallest bacterium.
True
False
Answer:False for sure
Explanation:
Defiantly false for sure
Based on the information in the passage, which conclusion can you
make?
A)
Life on the International Space Station is exactly like
life on Earth.
Life on the International Space Station is completely
different than life on Earth
Life on the International Space Station is
psychologically tough and painful to astronauts.
Life on a space Station is different in many ways and
similar in many ways to life on Earth.
Answer: ummmm b?
Explanation:
Crew members' usual routines, such as eating, sleeping, and hanging out, are greatly hampered by microgravity. Since there is no refrigeration on the space station, food must be carefully stored and frequently vacuum-packed. Thus, option B is correct.
What life on the International Space Station is?A sizable spacecraft in orbit orbiting the Earth is called the International Space Station.
The space station was created and used by international cooperation. Humans can live in space as long as there is a source of oxygen, heat, water, and food.
Power is provided by four enormous solar arrays, food is transported on board by shuttles, and oxygen and water are produced and recovered by specialized station modules.
Therefore, Life on the International Space Station is completely
different from life on Earth.
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Wild animals are commonly divided into groups with similar characteristics. The two categories used for mammals are:
Mammals are broadly categorized into three groups: monotremes, marsupials, and eutherians (placental mammals). Each of these groups has distinct reproductive characteristics such as egg-laying in monotremes, pouch nurturing in marsupials, and the presence of a complex placenta in eutherians.
Explanation:Modern mammals are commonly divided into three broad groups: monotremes, marsupials, and eutherians (or placental mammals). Monotremes are unique among mammals as they lay eggs rather than giving birth to live young. Marsupials give birth to very immature young, which typically complete their development in a pouch.
Eutherian mammals, also known as placental mammals, possess a complex placenta that connects a fetus to the mother, allowing for gas, fluid, and nutrient exchange. All mammals nourish their young with milk, which is derived from modified sweat or sebaceous glands.
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The three primary groups of mammals are monotremes, marsupials, and placental mammals. Monotremes lay eggs, marsupials give birth to partially developed young that continue to develop in a pouch, and placental mammals give birth to fully developed young after a longer gestation period.
Wild animals, particularly mammals, are categorized based on their distinguishing characteristics. The three primary groups of mammals are:
Monotremes (Prototheria): These are egg-laying mammals. An example is the platypus. They have a unique reproductive strategy compared to other mammals.Marsupials (Metatheria): Marsupials give birth to partially developed young that typically complete their development in a pouch. Examples include kangaroos and koalas.Placental mammals (Eutheria): These mammals give birth to fully developed young after a longer gestation period during which the embryo is nourished via a placenta. Examples are humans, elephants, and whales.Together, marsupials and placental mammals are known as therian mammals, while monotremes are called prototherians.