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Marina CMI [18]
3 years ago
9

Visitors to Canada are asked to declare if

Biology
1 answer:
elena55 [62]3 years ago
6 0
Even though it might seem harmless you never know if it can harmful to someone else’s allergies or if has a virus on them are not it never hurts to check
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Which of the following is an example of an adaptation?
erma4kov [3.2K]

Answer:

B

Explanation:

The butterfly formed those adaptions so predators are less likely to eat it

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two students are discussing natural selection in bacteria and how it can relate to antibiotic resistance in bacteria
shutvik [7]

Answer:

yes

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some the bacteria are resistance to antibiotics due to mutation.

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According to PET scan results, what do cocaine addicts process less efficiently?
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Positron Emission Tomography scan of the brain of cocaine addicts showed that the drug affects how the brain use glucose. Cocaine users' brain cannot use glucose efficiently and there are also reduced metabolic activity in other areas of the brain.
3 0
3 years ago
Which of the following best describes cell communication processes that are present in bacteria, yeast, and multicellular organi
Savatey [412]

Answer:

They release chemical messengers to communicate with cells they may or may not be in direct contact with.

Explanation:

Unicellular organisms such as bacteria or yeast, 'talk' to each other through the release of chemicals. In bacteria, this is known as quorum sensing which allows them to determine the surrounding bacterial population density. In yeast, one of the more popular pathways is known as the mating factor pathway, which allow the organisms to find mates. Whereas, in multicellular organisms (such as humans), this chemical release allows for cell-cell co-ordination which keeps the system functioning correctly.

5 0
3 years ago
What is the term for a top predator that contributes to the maintenance of species diversity among its animal prey?
andreev551 [17]

Answer:

Option A, keystone species

Explanation:

Keystone species are responsible for controlling any species from becoming dominant over all other species. The keystone species are found at the top of all the energy pyramids and food chains.

They control the explosion of population of prey and hence regulate the overall ecological diversity.  

Some common example of keystone species is as follows –  

Bison, prairie dog, large mammalian predators,  

 

Hence, option A is correct

3 0
3 years ago
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