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Hunter-Best [27]
3 years ago
12

how could scientists test the hypothesis of different areas having lighter or dark skin pigmentation ​

Biology
1 answer:
Sergeu [11.5K]3 years ago
4 0

scientists can test differences of the area with pigmentation by observing which is lighter and which is darker however they use microscope to look the difference of the pigmentation over the cells.

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(07.06 MC)
Luba_88 [7]

<u>Answer</u>:

C) They invade the body and can cause a humoral immune response.

This best explains the impact that pathogens in the environment might have on one's body.

<u>Explanation</u>:

Pathogens are the microorganisms that are found in the environment and have the tendency to cause diseases. The human body has various lines of defenses against the incoming pathogens, the Nonspecific responses keep the pathogens outside the body and these responses are common for all pathogens. If a pathogen manages to enter the body, then a series of specific responses are triggered which are focused on the type of pathogen.

The humoral response is a category of specific immunity and involves the substances found in body fluids. It particularly targets the newly invading pathogens. Hence, option C correctly describes the impact of pathogens on the body.

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777dan777 [17]

Answer:

A

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choli [55]
The DNA of a human cell can be cut and rearranged by using Enzymes. To cut DNA into smaller segments, enzyme nucleases are used. They do this by taking the phsophodiester bonds through hydrolysis and catalyzing it. when these enzymes comes into contact with a DNA sequence with a shape that matches a part of the enzyme, called the recognition site, it wraps around the DNA and causes a break in both strands of the molecule. 
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