1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vichka [17]
4 years ago
5

Why are phytoplankton essential to aquatic life zone?

Biology
2 answers:
Semenov [28]4 years ago
5 0
The pelagic zone because of the plankton is at the top
Eva8 [605]4 years ago
4 0

Provide basis of food chains.

You might be interested in
The p wave of the electrocardiogram is a signal from
Ratling [72]

The P wave of the electrocardiogram is considered as a signal from the DEPOLARIZATION of the atria in the heart. This depolarization drives the contraction of the atrial musculature.

An electrocardiogram (ECG) is a device that records the electrical activity of the heart. This record can then be used to diagnose different heart conditions.

The P waves occur when the sinoatrial node generates an action potential which is capable of depolarizing the atria.

This depolarization is then followed by atrial contraction and an increase of the pressure in the atria.

Learn more in:

brainly.com/question/1569437?referrer=searchResults

7 0
3 years ago
We know our sun is/has
anzhelika [568]
Sun is a 4.5 billion-year-old star – a hot glowing ball of hydrogen and helium at the center of our solar system
3 0
3 years ago
A gene involved in neural development shows three times as many synonymous site substitutions than nonsynonymous ones. A likely
viva [34]

Answer:

e. is under purifying selection

Explanation:

Purifying selection removes deleterious alleles that can arise through

random mutations

.

Mutations  may or may not have consequences at the level of genetic expression depending on whether those mutations are synonymous or nonsynonymous. Synonymous mutations do not generate changes in the protein to be encoded while non-synonymous ones do.

Important genes for the development of the organism - such as those involved in the  neural development- are very likely to be under purifying selection, eliminating individuals with deleterious alleles since those alleles (product of non-synonymous substitutions) do not allow the individuals to survive.

3 0
3 years ago
Which of the following undergo meiosis?
kogti [31]

Answer:

The sperm cells.

Explanation:

6 0
3 years ago
Read 2 more answers
What gland secretes thyroid hormone?
yan [13]

Answer:

The thyroid gland makes three hormones that it releases or secretes into the bloodstream. Two of these hormones, called thyroxine and triiodothyronine , increase your body's metabolic rate. Essentially, the body's metabolic rate is how quickly the cells in your body use the energy stored within them.

Hope this helps!

Explanation:

8 0
3 years ago
Other questions:
  • How does heat transferred through radiation different from conduction and convection /7622668/12287573?utm_source=registration
    11·1 answer
  • How does the immune system work together with the circulatory system to function properly? A. The white blood cells of the immun
    11·1 answer
  • How does geothermal energy differ from solar energy
    8·2 answers
  • What is an ion?<br> What is an ion?
    9·2 answers
  • What are the possible adulteration and possible deterioration of Curcuma longa (Turmeric) ?​
    8·1 answer
  • Biology help,,<br><br> will reward pls and ty
    14·1 answer
  • Name and describe the 4 adaptations of plants
    15·1 answer
  • Will mark BRAINLIEST!!! Can someone help me with these
    9·2 answers
  • How can we use patterns on the periodic table to predict an element’s structure and reactivity?
    8·1 answer
  • What structural adaptation do plants have, living in hot/dry climates, that helps in preventing water loss?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!