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melamori03 [73]
2 years ago
5

Which of the following best describes why polar bears are a sub-species of brown bears instead of a completely separate species?

A. Because they both have thick fur and 4 legs, so they are very similar B. Because they both live on the same continent, so they can’t be two separate species C. Because they can still breed in the wild. Once they no longer mate with brown bears, they will be considered a separate species D. All of the above
Biology
2 answers:
andrew-mc [135]2 years ago
6 0
D is the answer to your answer
s2008m [1.1K]2 years ago
3 0

Answer:

d

Explanation:

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wlad13 [49]

Answer:

umm

Explanation:

what do you mean please

7 0
3 years ago
In a typical cell placed into fresh water, osmotic pressure produces?
antoniya [11.8K]
No change. Change happens only when placed in a culture media.


Hope this helps you
7 0
2 years ago
HELP ME ASAP
Umnica [9.8K]
1. B Stomach
2. C Small intestine
3. A Chyme
4. D None of the Above
5. C Both A and B
6. D Blood
5 0
2 years ago
Upon examining a crime scene you don't locate any visible prints. To identify latent prints you will have to use a powder. There
shusha [124]
<span>1. The investigator should use fluorescent fingerprint powder, so that the prints will be visible on the dark surface when a special kind of light is used. 

2. A possible cause of death would be asphyxia, and is one of the most common causes of death that involve murder and violence. 

3. C. thin layer chromatography and Infrared spectrometry 

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5 0
2 years ago
Read 2 more answers
A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the labor
PSYCHO15rus [73]

A mutation is an alteration in the original DNA sequence.  Option 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.

<h3>What is a mutation?</h3>

A mutation is a stable and hereditably change in the genetic material.

Mutations alter DNI sequences and introduce new variants. Many of these variants are eliminated, but some of them might succeed and be incorporated in each individual, affecting the entire species.

They can be damaging or beneficial. These last mutations are the ones that have been selected by natural selection.

Different mutagenic agents cause changes in genetic information, increasing mutations over the normal level. They can change the bases sequences and bases pairing.

Mutations depend on each group's environment and its ecological pressures, and they accumulate in time. They are inherited to the followings generation and get to spread.

According to this framework, the correct option is 3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.

If the analyzed chemical is a mutagen, then it will cause an alteration in the DNA sequence and this change -mutation- will pass to the following generations spreading in the population.

You can learn more about mutations at

brainly.com/question/13923224

brainly.com/question/9598940

brainly.com/question/17106056

#SPJ1  

A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in

the laboratory

Which statement best provides evidence that the substance is a mutagen?

  1. The cells die within hours of being exposed to the chemical.
  2. The cells grow more quickly than those that were not exposed to the chemical.
  3. The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
  4. The cells continue to divide at the same rate as before they were exposed to the chemical.
3 0
1 year ago
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