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Tasya [4]
3 years ago
15

What is natural selection? ​

Biology
1 answer:
lora16 [44]3 years ago
5 0
A theory that states that only the organism with traits that are useful to the environment survive. For example, short-neck giraffes would’ve died out years ago as they can’t reach the trees nor eat grass on the ground.
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Which water pollutants can lead to excessive growth of water weeds​
pychu [463]

Answer:             Water pollution also affects the ecosystem – it can cause a phenomenon called eutrophication. This can cause fish and other aquatic organisms to die. Toxic elements dissolved in water can make their way to humans through fish or other aquatic organisms.

https://byjus.com/biology/effects-of-water-pollution/

Explanation:

3 0
3 years ago
Read 2 more answers
Which of the following is an example of an ABAB design? Half of the subjects receive one treatment and the other half are not tr
Karolina [17]

Answer:

Option D, A subject is observed both before and after two exposures to the treatment.

Explanation:

In A-B-A-B design the alphabets have following meaning

a) First A – It is the baseline value or the value measured before treatment

b) First B – It is the treatment measurement

c) Second A  - It is the withdrawal of treatment  

d) Second B – It is the reintroduction of treatment  

The second A is known as the reversal phase in which the intervention is withdrawn to see if the target behavior returns to the baseline behaviour

Thus , there are two measurements involved one before the intervention and second after the intervention

Option D is correct

4 0
3 years ago
Coal is a very useful rock that formed over millions of years from the remains of plants. Is coal a mineral?(1 point)
Anna007 [38]

Answer:

No, coal is not a mineral because coal is made of dead plants

Explanation:

Coal is formed when dead plant matter decays. Minerals are chemical compounds.

Minerals are not formed from plants or animals

3 0
3 years ago
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Please help very ez, will brainly, 5 star, and thanks
nalin [4]

Answer:

B

Explanation:

If the traits are favorable this means nature would select it.

3 0
3 years ago
How many hydrogen atoms are present in each water molecule?
iragen [17]

Answer:

Answer is A.

Explanation:

H2O, meaning 2 hydrogen and 1 oxygen. This is the recipe for water basically.

4 0
3 years ago
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