Answer: d. mass
Explanation: just tookthe test.
An increase in the rate of evolution in a population will be affected by which scenario?
A. Sunlight stimulates the growth of ash leaves.
B. Wind blows pollen grains to nearby ash trees.
C. Weevils eat the larger seeds dropped by ash trees.
D. Migrating birds rest in ash trees on their journey south.
Proteins help the body build new tissue, repair damage cells, and produce energy.
true or false
How many tentacles does a squid have.
Answer:
2 tentacles but 10 arms
the tentacles are normally the two longer arms.
Based on their names, you know that the baboons papio annubis and papio cynocephalus do not belong to the same.
Answer:
species
Explanation:
Papi is the genus while the 2nd word is the species
Is deforestation a sudden or gradual change?
I NEED THE ANSWER ASAP WILL MARK BRAINLIEST!!!! Hunting and habitat destruction have led to a decline in the cheetah population, and therefore a decrease in genetic variation within the cheetah population. What evolutionary mechanism most likely has contributed to this decrease in the population’s genetic diversity?
a. Gene flow
b. Mutation
c. Genetic drift
d. Recombination
The evolutionary mechanism that most likely has contributed to this decrease in the population’s genetic diversity is genetic drift.
What is genetic drift?Genetic drift is an overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.
Genetic drift is one of the contributing factors of decrease in genetic variation among a population of organisms.
Therefore, the evolutionary mechanism that most likely has contributed to this decrease in the population’s genetic diversity is genetic drift.
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On land, nitrogen-fixing bacteria convert nitrogen from the atmosphere into ammonia. Other kinds of bacteria then convert the ammonia into nitrates that plants can use. How does this part of the nitrogen cycle on land compare to the process that occurs in the ocean?
A. Plants convert nitrogen into ammonia, which animals convert to nitrates.
B. Plankton, not bacteria, convert nitrogen into ammonia.
C. Plants convert nitrogen directly into nitrates.
D. Plankton, not bacteria, convert ammonia into nitrates.
Answer:During nitrification, ammonia (NH3) is oxidized and converted to nitrite and then to nitrate. This process is carried out by chemosynthetic bacteria (also known as nitrifying bacteria). That is, the energy released during nitrification is used to synthesize organic matter.
2. Denitrification occurs when bacteria in the soil, called denitrifying bacteria, use nitrates and convert them to nitrogen gas. Denitrification ensures that nitrogen is returned to the atmosphere.
3. Atmospheric nitrogen is fixed primarily with the help of bacteria. These bacteria act by forming nodules in the cortical areas of the roots of these plants, where they remove atmospheric nitrogen and convert it to the ammonia (NH3) used by the plants.
Explanation:
Answer: The correct answer is D. Plankton, not bacteria, convert ammonia into nitrates.
Explanation: Confirmed correct.
Explain the ‘Central Dogma’
Answer:
It's an explanation in molecular biology, of the flow of genetic information provided in a biological system.
Why are scientists not able to agree on whether or not viruses are alive?
a. Viruses cannot evolve but can infect living cells.
b. Viruses cannot reproduce inside living cells but can evolve.
c. Viruses cannot infect living cells but can live independently.
d. Viruses cannot live independently but can reproduce inside living cells.
Answer:
A .Viruses cannot evolve but can infect living cells.
Early defibrillation is a link in the chain of survival. Why is this important to survival.
Answer:
As it can get rid of any irregular heart rhythms and with irregular heart rhythms, the more time it is present the more damage it can do added on to the fact it may not be as easy to get rid of.
Explanation:
Which biome would be found furthest north?
Answer:
The Arctic Tundra Biome
Explanation:
Please help quick. Fill in the blanks
Answer:
Nucleus
Ribosome
mRNA
Protein
Sequence (?)
Functions
Explanation:
is salmon and shark are the same
Answer:
No they are not the same...
Explanation:
Answer:
They are not the same
Explanation:
PLEASE MARK ME AS BRAINLIEST
9) The table shows the minimum pH that some common freshwater organisms can survive in water.
Which organism would be MOST sensitive to acid rain?
A) bass
B) clams
C frogs
D) mayflies
Answer:
Explanation:
The correct answer is option B- Clams
It is very clear how acid rain is affecting our ecosystem. Plants, animals and other living organisms are effected including their habitat.
When acid rain enters soil, it leaches aluminium from soil particles and mixes it with soil. Aluminium level in water intoxicates the water content which is critical for the survival of water animals.
The critical PH level for clams is 6.
can someone explain how impulses r transmitted at synapses
Impulses are transmitted through the help of neurotransmitters at the synapses.
What are synapses?Synapses are spaces at the neuronal junctions which are located between the muscle and the nerve cell.
Impulses arriving from a nerve cells usually crosses these spaces to the next nerve or muscles.
The generation of action potentials leads to the release of chemical messengers called the neurotransmitters.
These chemicals diffuse across the synapse (the gap between the two neurons).
The chemicals bind with receptor molecules on the membrane of the second neuron.
Therefore, Impulses are transmitted through the help of neurotransmitters at the synapses.
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Mosquitoes can carry and transmit many diseases to humans. In the past, the insecticide DDT was heavily used to reduce mosquito populations in order to reduce instances of disease transmission. However, after some time, mosquito populations developed a resistance to DDT, which made the DDT less effective in reducing mosquito populations.
Based on what you’ve learned about natural selection, in 3–5 sentences, describe how mosquitoes may have come to develop this resistance.
Answer:
After mosquitoes in a population are exposed to doses of insecticides that are too weak to kill them, mosquitoes may develop resistance to the active ingredient(s). This makes the use of surveillance-based targeted mosquito control of the utmost importance.Explanation:
Why are starfish such a problem for commercial fishermen?
Answer:
They occur naturally on reefs throughout the Indo-Pacific region, and when conditions are right, they can reach plague proportions and devastate hard coral communities. Our research has revealed crown-of-thorns starfish are a major cause of coral loss on the Great Barrier Reef, after coral bleaching.
Help me please that will mean a lot to me if y’all help me
D is ans becauseit convert
Explanation:
convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates.
What do a burrowing owl, mole rat, European hedgehogs have in common
Answer:
They all have good senses and similar traits.
If a cell had 12 chromosomes at the beginning of meiosis ii, how many would each daughter cell have after the completion of meiosis ii? 12 6 18 24
If a cell had 12 chromosomes at the beginning of meiosis II, each daughter cell would possess 12 chromosomes after the completion of meiosis II as well.
What do you mean by Chromosomes?Chromosomes may be defined as thin thread-like structures that contain genetic information associated with organisms.
After the completion of meiosis II, the four daughter cells are formed which are haploid in nature and contain a single copy of each chromosome.
So, if 12 chromosomes are there at the beginning of meiosis II, all the resultant four daughter cells possess a single copy of all the 12 chromosomes.
Therefore, it is well described above.
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Are chemical compounds that contain carbon and hydrogen atoms called petrochemicals?
Answer:False
Explanation:Fossil fuels are the energy-rich substances
Ecosystems are dynamic; they are always changing, and most changes occur naturally over time. However, natural disasters and human activities may dramatically alter an ecosystem.
A. True
B. False
Answer:true
Explanation:
its true bc humans cause lots of damage to ecosystems whether its littering or simply making certain animals extinct
Evolution Review Worksheet
the cenes of an e
m's Metime
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Occurs
Chancesi
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Divergent Evolute
A daeram sheine
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Gene How
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Homoloco
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M.
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When
Whe.
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1.
When two species (that
break off
14 UL The bats of wings, the flippers el whales and ee
11 Aave t?
structure because theys
n Acciimation
common ancestor.
Adaptation
is a population of squirrels that live in the forest. One day,
Adaptive Radiation
. the iquirreis decide to leave the forest and co live
Analoçou Structun
few miles away,
Bottieneck Effect
Founde ffect
off the coast of Mexico.
Gene Flow
17.
The cichlid fishes of Malawi rapidly changed into
Homologous Structures
species!
s a specialized:
for ei
Natural $
food.
18
There are two populations of wild horses: one that has mostly white horses and one that has mostly
brown horses. One day, a white horse wanders off and decides to join the brown horse population, adding the
white horse gene to the brown horse population
19. -9 Insects and Bats did
both developed
20.
There are tan mice
desert.
whiter
easily seen by snakes
so over time, the tan :
• prevalent because they
and reproduce.
21
Because it is colder during the winter, the bears that live north grow thicker fur to protect them from
the freezing temperatures.
Explanation:
d decides to join the brown horse population, adding the
white horse gene to the brown horse population
19. -9 Insects and Bats did
both developed
20.
There are tan mice
desert.
whiter
easily seen by snakes
so over time, the tan :
• prevalent because they
and reproduce.
21
Because it is colder during the winter, the bears that live north grow thicker fur to protect them from
the freezing temperatures
10) A species is considered introduced when its transport into an area outside of its native range is human mediated. Introductions by humans may be either intentional or accidental. In the U.S. many
economically important species have successfully been introduced and managed: they have not become invasive species. Identify the statement that is NOT CORRECT regarding the positive effects
of
introduced species
A) All Livestock species except the American bison and the turkey are introduced species to North America.
B) Thomas Austin, a British landowner had rabbits released on his estate in Victoria, Australia because he missed hunting them.
Eliminate
Species, such as the wolf, are reintroduced because it has become locally endangered or extinct and this is done in the interest of conservation
D) Many plants, such as the Norway maple and the Japanese maple, have been introduced with the intent of aesthetically improving public recreation areas of private
properties
Answer:
The introduction of new species in the new area make the specie invasive if there is no predator is present in that ecosystem because the predator helps in the controlling of the population of that invasive species. The big example of invasive species is rabbit in the Australia where rabbit become invasive when there is no predator is present in that region so they increase in population and destroy all vegetation of that region. So if there is no predator of a newly introduced species, it become invasive in future.
Explanation:
Which type of hormones act on other endocrine glands to stimulate secretion of hormones produced by the target gland?.
Answer:
ACTH, gonadotropins, and TSH
Explanation:
ACTH stimulates the adrenal cortex to produce corticosteroid hormone
What is a keystone species? Why are keystone species important to maintaining a balanced ecosystem?
Answer:keystone species are a species that is extremely important to the ecosystem or something. If keystone species go extinct, it could cause a huge problem for the ecosystem
Explanation:
Why if marathon runners start too quickly are unlikely to finish the race
Answer:
The marathon runners likely will get too winded out!
Explanation:
A marathon is a long-distance dash (roughly 26.2 miles!) If you walked that distance at an average speed it will take roughly you 8 and a half hours. Think about it let's say the runners dashed the first 5-10 miles as fast as they can, just imagine how tired they would be. They might faint or something else that might make the runners have to stop running the marathon. If the runners ran the marathon at more of a jogging pace, it's less likely for them to faint making it more likely for the runners to finish the race!
Angela, one of your classmates, is concerned about the decline of the Emperor Penguin population and the decline in biodiversity that could occur in the Antarctic peninsula. What part of her ecological footprint can she reduce to most directly help ease her personal impact on these concerns? Use the information in the table to help you answer the Los question. How Human Actions Can Help the Environment Action Effect on Environment Decreasing water usage Ensures that there are adequate water supplies for everyone Recycling Reduces use of landfills; reduces extraction of minerals from Earth's crust; reduces use of other resources Reducing burning of fossil fuels Reduces amount of greenhouse gases in the air; slows global warming and climate change (A) Reduce trash generation by recycling more. (B) Install a more efficient showerhead and faucet to decrease her water usage. (C) Bike to school instead of driving to reduce pollution from fossil fuels. (D) Since humans do not live in Antarctica, our ecological footprints do not affect these penguins.
Answer:
c
Explanation:
global warming is serious issue to deal with
Increasing and improving aquaculture will:
A) pollute Earth's oceans.
B)improve food security by providing a more resource-efficient protein source.
C) release large amounts of carbon dioxide into the atmosphere.
D) increase nutrients in fruits and vegetables.
release large amounts of carbon dioxide into the atmosphere.
What is a deep, underground water supply that has accumulated over a long period?
groundwater
surface water
aquifer
reservoir
