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
Finger [1]
3 years ago
11

Can someone please help me!

Biology
1 answer:
kkurt [141]3 years ago
5 0
The answer is C.

It is the site of gas exchange in the lungs.

Gas exchange occurs only in alveoli. Alveoli are made of thin-walled parenchymal cells, typically one-cell thick, that look like tiny bubbles within the sacs. Alveoli are in direct contact with capillaries (one-cell thick) of the circulatory system.
You might be interested in
Which of the following describes plant cells but not animal cells?
FinnZ [79.3K]

Answer:

Explanation: option c

8 0
3 years ago
Read 2 more answers
Describe one piece of evidence that a chemical reaction occurs when baking soda is added to vinegar
lord [1]
When the bubbling takes place from Co2
3 0
3 years ago
________ are cells in the epidermis that are part of the immune system. ________ are cells in the epidermis that are part of the
salantis [7]

Answer:

<u>Melanocy</u><u>tes</u><u> </u>are cells in the epidermis that are part of the immune system

3 0
3 years ago
The endosymbiotic theory was supported by the scientist Carl WoeseLynn MargulisRobert Hook, who studied mitosing cells.
dedylja [7]
<span>Lynn Margulis supported the endosymbiotic theory and studied mitosis in cells. She was an American evolutionary theorist who made great significance in the symbiosis of organisms in biological evolution. She is also a developer of the Gaia Theory, which believes that the Earth functions as a single self-regulating system. </span>
5 0
4 years ago
Read 2 more answers
Which best describes the structure of DNA?
Stells [14]

Answer:

C.  Nucleic Acids arranged in a double helix.

Explanation:

The structure of DNA is best described as a double helix. DNA has a sugar phosphate back and nucleotides connected by covalent bonds. Together, it looks like a twisted ladder which is also known the double helix.

8 0
3 years ago
Other questions:
  • A client has been admitted to the emergency department. the client's family tells the nurse that the client has suddenly become
    7·1 answer
  • Which term defines a well-tested, scientifically supported statement that explains how something works?
    5·2 answers
  • Most European nations have a dominant culture.<br> a. True<br> b. False
    14·1 answer
  • What is the meaning of toilet paper
    11·2 answers
  • Which of the following describes the pathway that nerve impulses travel while throwing a baseball?
    5·2 answers
  • How many times wider is the sun than the earth
    6·1 answer
  • No single characteristic alone can describe a living thing, but all living things share certain characteristics. Fill out the co
    8·2 answers
  • Hydrogen bonds occur between the
    15·2 answers
  • Two rough black guinea pigs when bred together have two offspring. One of them is rough white and the other is smooth black. Wha
    6·1 answer
  • What does the similarity in the front limbs of different vertebrate animals tell us about their evolutionary relationships?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!