Answer:
The most successful option would be: Many capillaries surround a sac.
Explanation:
Although in this question, I wanted to tell you that among all the options that is the most correct, but it is incomplete.
The capillaries that are in the alveolar unit are not only in great numbers to ensure gas diffusion but they are also SINUSOID capillaries where the cells of these capillaries do not have tight cell junctions, and there is a micrespace between cell and cell that forms the capillary wall.
And why is this? Because the greater the permeability of the capillary, the better the process of gas homeostasis or gas exchange at the alveolar level will be favored.
I hope I have completed your question, because it is very important that you know this, they are not simple capillaries that are only increased in number, but their sinusoidal permeable form makes them fulfill a VITAL function for the human being, this does not mean that all the capillaries of the body are like this, do not forget that we are speaking on time of the socket.
Answer:
A virus
Explanation:
All prokaryotes and eukaryotes have a cell membrane. The only "living" things that don't are viruses, and they are not even considered strictly living, since they cannot reproduce without a host. They are instead sometimes referred to as an infectious "agent" (which explains why it might affect a few living organisms in the area)
A virus consists of genetic material (either DNA or RNA) surrounded by a protein coat or capsid, which is fitting with this description.
Answer:
They provide the energy to form carbohydrates from carbon dioxide molecules. The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process.
Explanation:
Answer:
false
Explanation:
with new knowledge , science evolves.
