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
solmaris [256]
3 years ago
11

Certain amino acids are called essential because they ______.

Biology
1 answer:
kumpel [21]3 years ago
3 0
Essential amino acids are amino acids that must be supplied to one's body by their diet because they cannot be synthesized from scratch. 
You might be interested in
Which of the following examples is an endothermic process? Which of the following examples is an endothermic process? Heat is ne
pychu [463]
<h2>Endothermic Process</h2>

Explanation:

An example of endothermic process is :

Heat is needed for water to boil.

Endothermic process can be defined as a process in which heat energy is absorbed from the surrounding that bring about changes in the molecular level like breaking chemical bonds, inter-molecular force of attraction etc.

Boiling of water is an endothermic process because during this process water absorbs heat , its kinetic energy increases and then it boils.

3 0
3 years ago
The best indicator of the efficiency of exercise is
butalik [34]
I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
6 0
2 years ago
How is water formed during the electron transport chain
olga55 [171]

Answer:

The electron transport chain is the third and final step of cellular respiration. At the end of the electron transport chain, the hydrogen from the coenzymes meets the oxygen which the cell has consumed and reacts with it to form water. Therefore, water is created as a byproduct of the metabolism reaction.

5 0
2 years ago
What are the two species of penguin are we likely to see on the third day?
Nesterboy [21]
They will be <span>Gentoo and Magellanic penguins.</span>
6 0
3 years ago
Read 2 more answers
Match each word to its correct meaning.
morpeh [17]

Answer:

Radioactive decay means the process by which unstable nucleus of an atom spontaneously releases energy through the emissions of radiation used in dating fossils and rocks.

Relative dating mean the time required for half the atoms in an element to divide in half.

Explanation:

So radioactive decay belongs to A.

And relative dating belongs to B.

Please mark Brainlist if right

6 0
3 years ago
Other questions:
  • I found a baby snow leopard behind my house and adopted it.
    14·2 answers
  • Which of the following statements are true about fungi? all fungi are pathogens. All fungi are microscopic. all fungi are living
    6·2 answers
  • It is recommended that you consume from 10 to ________ percent of your total daily calories from protein. 25 15 30 35
    9·1 answer
  • A woman who is a carrier of the hemophilia allele and a man that is normal for hemophilia allele have
    6·1 answer
  • 3 problems that occur when coal is used
    5·1 answer
  • What is a dominant and recessive allele (and trait)<br><br> (please help!)
    9·1 answer
  • What are somethings people do that increase water erosion on beaches and on surface areas within continental interiors?
    15·2 answers
  • How and why does DNA change during meiosis
    10·1 answer
  • Did humans and dinosaurs coexist ? Explain your response
    13·1 answer
  • Why do some codons code for the same
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!