Answer:
the main function of a plant's seed is reproduction to keep it in existence. So, that makes the answer (3) Take in light energy to be used during photosynthesis.
Explanation:
The primary function of a plant's seed is to store food for the embryo's early development. Seeds consist of an embryo, seed coat, and endosperm, with the latter providing the necessary nutrients.
A main function of a plant's seed is to store food to be used during early development. This stored energy and nutrients are critical for the growth of the embryo within the seed. Within flowering plants, these resources can be found in the form of the endosperm or sometimes within the cotyledons, depending on the type of plant.
Seeds have three main parts: the embryo, the seed coat, and the endosperm or cotyledon. The embryo is the young plant itself, the seed coat provides protection, and the endosperm or cotyledons serve as a food reserve. The seed effectively allows a new plant to have a head start in life, providing protection, nutrients, and a mechanism for dormancy, enabling germination when conditions are optimal for growth.
Explain how birth rate, immigration, death rate,
and emigration affect population growth.
Answer:
A population may grow through births or immigration, the movement of individuals into a population.
A population may shrink through deaths or emigration, the movement of individuals out of a population.
Population growth may be calculated using the formula:
(birth rate + immigration) – (death rate + emigration) = population growth
Explanation:
copied from edge
Air pressure is _____.
Answer:
Air pressure is the weight of air molecules.
Explanation:
Air pressure can be described as the force generated by the weight of air on the surface of the Earth. The size and number of the air molecules determine the air pressure.
When the number of molecules in the air increases, it generates more force on the Earth's surface and we say that it is regarded as a rise in the atmospheric pressure. A mercury barometer is a device which is used to measure the air pressure.
Why do sex-linked traits follow different patterns of inheritance than other
traits?
O
A. Females only carry dominant alleles.
B. Females only have one X chromosome.
C. Males only have one X chromosome.
O
D. Males only carry recessive alleles.
males only have one x chromosome (d)
in sex linked traits males always express it as they have x y chromosomes and can't cover up the trait whereas females have two x chromosomes and can cover up the trait
Answer:D
Explanation:
Internal gestation followed by live birth is an evolutionary development most likely driven by which of the following? A. The inability of eggs to acquire nutrients to grow complex animals B. The need to give birth and reproduce on dry land where eggs could dry out C. The threat of predators to eat eggs D. Environmental conditions caused eggs to over-absorb dangerous molecules from the environment
Internal gestation likely evolved primarily to prevent dehydration of eggs on land, with added benefits of reducing predation and ensuring higher offspring survival rates.
Internal gestation followed by live birth is an evolutionary development most likely driven by the need to give birth and reproduce on dry land where eggs could dry out. This is because internal fertilization and gestation protect the fertilized egg from dehydration, which is a significant risk for eggs laid on land. Furthermore, internal fertilization isolates the embryo within the female, greatly limiting predation on the young, and enhances the likelihood of fertilization of eggs by a specific male. Although it results in fewer offspring compared to external fertilization, the offspring produced through internal fertilization have higher survival rates due to these protective measures.
While the threat of predators consuming eggs and environmental hazards are also valid concerns, the desiccation risk on land is a critical selective pressure. For instance, while reptile and bird eggs have protective coverings, such as leathery shells or hard calcium coverings, the evolutionary move to internal gestation enables further protection and higher developmental success in terrestrial environments.
The fruit of a certain plant is sweet and fleshy. The seeds of this plant have a seed coat that is
fairly tough. The seeds germinate better if they are exposed to acid, or scarification. What is
the most likely type of dispersal for this seed?
water
animal
wind
Answer:
Animal
Explanation:
The fact that the seed is sweet and fleshy means it attracts animals who ingest it due to its palatability. The animals get to diperse the plant seeds. The acidic environment of the digestive tract of the animals helps soften the seed coat. When the seed is finally excreted by the animal, is can easily germinate.
What part of the cell does 9 represent?
A. Cytoplasm
B. Lysosome
C. Ribosome
D. Centrosome
Answer:
Lysosome
Explanation:
google search the image
The hypothetical island country of Gilder lies in the Mediterranean Sea off the coast of France. Demographers have studied Gilder for the past 50 years. At the beginning of the study, Gilder had a population of 20 million. The demographers have measured birth and death numbers, as well as immigration and emigration numbers, as shown in the data table. From the data, Calculate the population of Gilder for each 10-year period by filling in the Population (NO) and Population (Nt) columns in the data table. Use this formula to do your calculations: Population size: Nt = No + (B + I) – (D + E)initial population = 20,000,000
Answer:
Year 10 - No = 20,000,000 : Nt = 20,820,000
Year 20 - No = 20,820,000 : Nt = 22,000,000
Year 30 - No = 22,000,000 : Nt = 23,735,000
Year 40 - No = 23,735,000 : Nt = 25,843,000
Year 50 - No = 25,843,000 : Nt = 28,183,000
Given, initial population = 20,000,000. So, we can measure population size by population geometric growth model:
Nt = No + (B + I) – (D + E)
What is Population?
Population is defined as the inhabitants of a particular area, town, or country.
Whereas, B is birth rate,
D: death rate of population
I : immigration of population
E: Emigration of population
Nt: population size during time intervel
No: Initial population size,
Year 10 - No = 20,000,000 : Nt = 20,820,000
Year 20 - No = 20,820,000 : Nt = 22,000,000
Year 30 - No = 22,000,000 : Nt = 23,735,000
Year 40 - No = 23,735,000 : Nt = 25,843,000
Year 50 - No = 25,843,000 : Nt = 28,183,000
Conclusion, after the 50 years (Nt) the population size will be 28,183,000.
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What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance
Answer:
water balance
Explanation:
The flow of water from the high concentration to the low concentration is called osmosis.
The correct answer is option D which is water balance.
What is osmoregulation?The regulation of solute in the water is called osmoregulation.
According to the question, The concentration of the solution depends on the solute and the solvent. The universal solvent is water.
Hence, the correct answer is option D.
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If a person had a low level of neurotransmitters, how could this affect the person?
A) Sensory neurons would not be able to form action potentials
B) Neurons would not be able to communicate across synapses
C) Axons would not be able to receive messages
D) The endocrine system would not be able to produce hormones
Answer:
B
Explanation:
Neurotransmitters such as acetylcholine, epinephrine are important at a neuron-neuron junction called synapses. When an impulse reaches the end of one neuron, at the synapse, it causes the release of neurotransmitters from synaptic vesicle that diffuse across the synapse and when they bind to their reports on the other end. An impulse is then generated on the subsequent neuron that travels down the axon to the next synapse.
A low level of neurotransmitters would lead to impaired neuron-to-neuron communication across synapses because neurotransmitters facilitate the transfer of action potentials between neurons. This can affect various bodily functions and potentially lead to mood disorders or impairments in muscle movement and memory, depending on the affected neurotransmitter systems. The correct option is B.
If a person had a low level of neurotransmitters, it could significantly affect their ability to function normally. Neurotransmitters are crucial for the communication between neurons across the synaptic cleft. The correct answer to the question is B) Neurons would not be able to communicate across synapses. When an action potential reaches the end of an axon, it usually triggers the release of neurotransmitters into the synaptic cleft, which then bind to receptors on the postsynaptic neuron's membrane to continue the transmission of the signal.
With low levels of neurotransmitters, the signals sent by neurons would be less likely to cause an action potential in the next neuron. This insufficiency would lead to weakened neural signaling, which can manifest in various ways depending on which neurotransmitters are low and what areas of the brain or body are affected. For example, a deficiency in neurotransmitters like serotonin or dopamine can lead to mood disorders, whereas a lack of acetylcholine can impact muscle movement and memory functions.
mikael runs with a speed of 3 m/s of 45 seconds . How far does mikael run
Answer:
Mikael runs 135m
Explanation:
To find out how far Mikael ran we will need to do a calculation. The calculation is very simple and can be solved according to the following formula:
distance = speed x time
distance = 3m / s x 45s
distance = 135 meters.
That is, Mikael ran 135 meters in 45 seconds at a speed equal to 3m/s.
How does natural selection affect undesirable traits?
A.
It increases them.
B.
It has no effect.
C.
It eliminates them.
D.
It decreases them.
Answer:
the answer is c
Explanation:
After a major forest fire, the process of succession begins in an ecosystem.
Which best describes how succession changes the ecosystem?
Succession is a gradual, predictable process of ecological change after a disturbance, leading to the establishment of pioneer species, development of more complex communities, and eventual stability in the form of climax communities.
Succession is the gradual and predictable process by which the structure and composition of an ecosystem change over time after a disturbance, such as a forest fire. It typically involves the following stages:
1. Pioneer Species: After the disturbance, pioneer species, often well-adapted to colonize bare or disturbed areas, establish themselves.
2. Primary Succession: Over time, more complex plant and animal species colonize the area, leading to the development of a more stable and diverse community. This process is known as primary succession and occurs in areas where no soil is initially present.
3. Climax Community: Eventually, the ecosystem reaches a climax community, which is a stable and self-sustaining community of plants and animals. This community can persist for an extended period under the prevailing environmental conditions.
4. Secondary Succession: In cases where the soil is already present, secondary succession may occur. This process is faster than primary succession as it builds upon the existing soil and seed bank.
Overall, succession brings about a gradual and dynamic transformation in the structure and biodiversity of an ecosystem, leading to increased complexity, stability, and diversity over time.
The earth's four main spheres continuously interact to support life and balance Earth's materials. When plants absorb carbon dioxide for photosynthesis, it is an example of _____ and _____ sphere interaction. biosphere, lithosphere biosphere, atmosphere hydrosphere, lithosphere cryosphere, lithosphere
Answer:
Bioshpere and atmosphere interaction.
Explanation:
Plants are living organisms that are part of the biosphere. These plants obtain their carbon from the atmosphere, absorbed through the leaves. The carbon that they absorbed is used to produce their food through the process called photosynthesis, which also needs water and sunlight for it to occur.
Although plants are rooted on the ground, it is still part of the biosphere because the biosphere encompasses all living things.
Which of the following are the functions of the skeletal system?
Blood cell production in soft marrow tissues and mineral reserves
Largest organ of the body for defense and support
Vitamin D production and pumping blood through vessels
Voluntary movement and contractile movement
Blood cell production in soft marrow tissues and mineral reserves. Therefore, option (A) is correct.
The skeletal system is a complex framework of bones, cartilage, and connective tissue that provides structural support and protection for the body's organs and tissues. It consists of 206 bones in adults, which are connected to each other by ligaments, tendons, and muscles, allowing for movement and flexibility.
The skeletal system also plays a crucial role in producing blood cells, storing minerals such as calcium and phosphorus, and supporting the body's weight. Without the skeletal system, the body would not have the necessary support to maintain its shape, nor would it be able to move or perform many of its vital functions.
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HELP BEING TIMED!
Which condition causes changes in air pressure in the atmosphere?
building clouds
rapid air movement
condensation of water vapor
uneven heating of Earth’s surface
Answer:
Uneven heating
Explanation:
Uneven heating I believe because change in pressure is caused by changes in air density, and air density is related to temperature. warm air is less dense than cooler air
Answer:
Unevening heating of Earth's surface
Explanation:
since the Earth is made by land and water it absorbs the sunlight of the sun at different high levels. Pressure,wind includes that as well.
Which are the Major components of ribosomes? NEED HELP ASP PLEASE
(a) single strands of sugar
(b) DNA and proteins
(c) RNA and proteins
(d) double strands of nucleic acids
Answer:
C
Explanation:
RNA or Rybo-nucleic Acids are used to make the Proteins that have different functions within the cell.
Which are the Major components of Ribosomes?
Answer choices:(a) single strands of sugar
(b) DNA and proteins
(c) RNA and proteins
(d) double strands of nucleic acids
Answer:(C) RNA and proteins
Explanation:RNA or Ribonucleic acid Makes Ribosomes in cells
HOPE THIS HELPS
. A species of moth has evolved a very long tongue to reach nectar at the bottom of a species of orchid. This orchid has evolved a long nectar tube, so that moths feeding on its nectar contact its pollen, helping it to reproduce. This is an example of
A. coevolution. B. independent evolution. C. chemical evolution. D. predatory evolution.
This is an example of <b>co-evolution</b>.
Co-evolution is when species influence each other in their evolution.
An example of what is geese flying south for the
Answer:
migration
Explanation:
birds move one place to another, geese is one of them, usually they migrate is because winter is coming and there isn't so much food,need shelter, surviving and driving to safety. All they want is a good home
♡
Which would be an adaptation in a rainforest, but not in a tundra?
A. Ability to store water for a long time
B. Fur that blends in with snow
C. Strong claws for killing prey
D. A beak that can dig into thick trees
A beak that can dig into thick trees would be an adaptation in a rainforest.
What is adaptation in the rainforest?
leaves and flowers grow in the canopy. Tree trunks are tall and thin to allow trees to reach the sunlight.
Which would be an adaptation for living in the tundra?Adaptation in tundra includes :
low-lying seeds that scatter in the wind.narrow leaves helping to reduce transpiration.adapted to a short growing season (so has a short life cycle)dense flowerheads reducing heat loss.darker leaves helps absorb energy from Sun.To learn more about rain forest , here
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How does mining impact the environment ?
Answer:
It has a negative impact on the environment by allowing toxic chemicals to harm wildlife
Explanation:
;)
Mining impacts the environment by causing deforestation, habitat destruction, soil erosion, water pollution, and air pollution, as well as contributing to climate change through greenhouse gas emissions and releasing toxic substances into the environment.
Mining activities have significant and widespread environmental impacts due to the extraction of valuable minerals and metals from the Earth's crust. Deforestation often occurs when mining companies clear large areas of forest to access mineral deposits, leading to the loss of biodiversity and disruption of ecosystems.
Habitat destruction is a consequence of mining that can result in the displacement or extinction of plant and animal species, further contributing to the loss of biodiversity. The removal of vegetation during mining operations also leads to soil erosion, making the affected areas more susceptible to landslides and loss of fertile topsoil.
Water pollution is a common environmental consequence of mining activities. Toxic chemicals and heavy metals used in mining processes can leach into nearby water bodies, contaminating them and harming aquatic life. Additionally, acidic mine drainage can occur when exposed rocks and minerals react with air and water, leading to increased acidity and further pollution of streams and rivers.
Air pollution is another significant impact of mining, particularly from dust emissions during excavation and transportation of materials. In some cases, mining operations can release harmful gases and particulate matter into the atmosphere, contributing to respiratory problems and affecting local air quality.
Furthermore, mining activities can contribute to climate change through greenhouse gas emissions. Fossil fuel consumption during mining operations releases carbon dioxide and methane, both potent greenhouse gases that contribute to global warming.
Moreover, the disposal of waste materials from mining can lead to the release of toxic substances into the environment, posing a long-term threat to ecosystems and human health.
Overall, mining's environmental impacts are complex and can vary depending on the type of mining, the location, and the management practices employed. Proper regulation, mitigation strategies, and sustainable mining practices are essential to minimize these negative environmental impacts and ensure the protection of natural resources and ecosystems for future generations.
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ANSWER STAT PLEASEEEE
A pea plant purebred to produce round yellow peas is crossed with a plant purebred to produce wrinkled green peas. Round pea shape is dominant to wrinkled, and yellow pea color is dominant to green. Members of the resulting F1 generation are then crossed to produce an F2 generation, as shown in the figure. On average, what fraction of the F2 generation will display both dominant traits?
A. 16 out of 16 plants will display both dominant traits.
B. 12 out of 16 plants will display both dominant traits.
C. 9 out of 16 plants will display both dominant traits.
D. 4 out of 16 plants will display both dominant traits.
Answer:
option B,12 out of 16 plants will display both dominant traits.
Explanation:
Round (R)pea shape is dominant to wrinkled (r), and yellow (Y) pea color is dominant to green(y)
F1 generation - Round yellow peas is crossed with a plant purebred to produce wrinkled green peas.
So the genotype of offspring of F1 generations will be
RY * ry
RrYy
F2 generations - A cross is carried out between the offspring of F1 generation. Thus, The cross between "RrYy" and "RrYy" is represented by the punnet square as below -
RY Ry rY ry
RY RRYY RRYy RrYY RrYy
Ry RRYy RRyy RrYy Rryy
rY RrYY RrYy rrYY rrYy
ry RrYy Rryy rrYy rryy
Hence, out of total 16, genotype rrYY , rrYy, rrYy and rryy , do not have both dominant traits.
Rest all 12 have both the dominant traits.
Hence, option B is correct
Nine out of sixteen members of the [tex]F_2[/tex]generation will exhibit both dominant characteristics. So, the correct option is C.
We must take into account the genetic potential coming from hybridization between plants of the [tex]F_1[/tex] generation to estimate the proportion of the [tex]F_2[/tex] generation that will display both dominant characteristics. With one dominant allele (R for round shape and Y for yellow color) and one recessive allele (R for wrinkled shape and Y for green color), all plants in the [tex]F_1[/tex] generation are heterozygous for both characteristics.
We can use Punnett squares to obtain an estimated phenotypic ratio when these [tex]F_1[/tex] plants are crossed to the [tex]F_2[/tex] generation:
According to the Punnett square, there are 16 possible genotypes in the [tex]F_2[/tex] generation. Nine of these genotypes (RRYY, RRYy, RrYY, and RrYy) will display both dominant features (round shape and yellow color). Plants with these genotypes will have both dominant characteristics.
Therefore, nine out of sixteen members of the [tex]F_2[/tex]generation will exhibit both dominant characteristics. So, the correct option is C.
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Which phrase describes the element carbon-14?
A-decays at an unknown rate
B-found in an organism’s remains
C-forms from the breakdown of nitrogen-14
D-is measured to determine the age of sedimentary rocks
The correct option is B.
Carbon-14 is a carbon radioisotope discovered on february 27, 1940 by Martin Kamen and Sam Ruben.
It is used to determinate the age of fossils or archaelogical remains that contain organic material : remains of living beings or objects made of natural raw materials such as wood.
The radiocarbon dating method is the most reliable technique for knowing the age of organic samples less than 60.000 years old.
Paleontologists as they know the average time of disintegration of that isotope, examining the amount of that compound and its extinction curve, can know the antiquity of a fossil.
The mass of the 14C isotope of any specimen decreases at an exponential rate, which is known at 5.730 years after the death of a living being, the amount of 14C in its remains has been reduced by half. Thus, by measuring the amount of radioactivity in a sample of organic origin, the amount of 14C still remaining in the material is calculated. This way it can be dated the moment of the death of the corresponding organism.
Homes that have less/fewer_
most likely have worse indoor pollution.
Answer:Air Flow.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Airflow.
Therefore, the quality of indoor air may be even more important than outdoor quality because of exposure time to pollution. According to the EPA, indoor air quality can be two to five times worse than outdoor air quality, especially with regard to airborne chemicals.
Which is more harmful indoor or outdoor air pollution?According to the EPA, however, the levels of indoor air pollutants are often 2 to 5 times higher than outdoor levels, and in some cases, these levels can exceed 100 times that of outdoor levels of the same pollutants. In other words, sometimes the air inside can be more harmful than the air outside.
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Phylogenetic trees represent
A. unique species that share few characteristics with species today.
B. points in time where species went extinct.
C. geographical areas that supported a variety of species in the past.
D. evolutionary relationships between species
Top 3 ideas for maintaining soils and supporting biodiversity.
Answer:
Crop rotation, intercropping, adding manures and composts to the soil.
Explanation: yesquad
Implementing agroforestry practices, reducing tillage and supporting the use of organic fertilizers.
What are the ways to maintain soil and biodiversity?Adopting regenerative agriculture practices: Regenerative agriculture practices such as cover cropping, crop rotation, and reducing tillage can help maintain soil health and support biodiversity. These practices promote the growth of soil microorganisms, which are essential for plant growth and nutrient uptake, while also preventing soil erosion and reducing the use of synthetic fertilizers and pesticides.
Planting diverse crops and creating habitats: Planting diverse crops such as companion plants and incorporating wildflower strips or hedgerows can support biodiversity by creating habitats for pollinators and other beneficial insects. Creating habitats can also help to prevent soil erosion and improve soil structure by promoting the growth of deep-rooted plants.
Composting and reducing waste: Composting food and yard waste can help to maintain soil health by adding organic matter to the soil, improving soil structure, and increasing nutrient availability for plants. Composting can also reduce the amount of waste sent to landfills, which can contribute to greenhouse gas emissions and other environmental issues. By reducing waste and composting, we can support biodiversity by reducing the impact of human activity on the environment.
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what do cellular respiration and fermentation have in common
pllllllllzzzzzzzzzzzzzz help asap
the following diagram shows the branching tree diagram for some animals.
Which two organisms share the greatest number of derived characteristics? (5 points)
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answer:
lion and chimpanzee
Explanation:
lion and chimpanzee
share the greatest of derive characteristics
Answer: Shark and Chimpanzze
Explanation: They share the least amount of characteristics.
Why are fossils found mainly in sedimentary rock? Choose all that apply.
All fossilized organisms lived in the sea.
Igneous rocks form under conditions too hot for lifeforms.
Sedimentary rocks form in layers.
Sedimentary rocks form at the Earth’s surface.
Answer:
Sedimentary rocks form at the Earth's surface.
Hope this helps!
Explanation:
Answer:
Sedimentary Rock- "They are formed by the accumulation and solidification of sediments, as the sediments are supplied by the wind, air or even ice(water)."
As the sedimentary rocks are formed under low temperature,T and low pressure,P.
Explanation:
Sedimentary rocks mainly posses the fossilized bodies because when the living organism or plant dies there body is buried under the layer of sediment. As the sedimentary rocks are formed by the action of slit and mud. As for Igneous rocks they do not posses any fossilized body just because they are formed under very harsh conditions.How would you define energy How would you define energy and why do living things need energy
Answer:
Living things obtain and use energy
Explanation:
Cells cannot survive on their own. They need power to stay alive. They need energy to perform functions such as growth, maintaining balance, repair, reproduction, movement and defense. This means all living organisms must obtain and use energy to live.
Answer:
PLATO SAMPLE ANSWER:
Energy is the ability to do work. Living things need energy to grow, develop, move, and perform voluntary and involuntary body processes.
Explanation:
How do cranial nerves transmit information to the senses?
Answer:
it transmits threw the neurons