C. a rise in blood carbon dioxide concentration
Explanation:
Negative feed back mechanism refers to the control mechanism in which a product of a particular pathway controls the switch on and switch off of that particular pathway.
Since breathing increases the blood oxygen concentration and lowers carbon dioxide concentration and pH. The sensors that regulate the breathing should respond to oxygen concentration as the carbon dioxide is the by-product of respiration and is responsible for increasing blood pH. Thus increased Carbon dioxide levels in blood is the only factor which will trigger breathing.
C. <span>continue to divide even when they are tightly packed together.
Hope this helps(;</span>
A:110 B:40 C:10 but good job on B
Answer:
526.12 μm³
Explanation:
Given that;
A typical human cell is approximately 10.00 μm in diameter &
enclosed by a membrane that is 8.000 nm thick.
What is the volume of the cell including the membrane?
First, let's determine the radius of the human cell=
= 
= 
= 5 μm
Now, the radius of the cell including the membrane
= 5 μm + 8.000 nm
= 5 μm + 0.008 μm
= 5.008 μm
The volume of the cell including the membrane is given by the formula:
![V_{cell]= \frac{4}{3} *\pi *(r_{cell})^3 um^3](https://tex.z-dn.net/?f=V_%7Bcell%5D%3D%20%5Cfrac%7B4%7D%7B3%7D%20%2A%5Cpi%20%2A%28r_%7Bcell%7D%29%5E3%20um%5E3)
526.1160731 μm³
526.12 μm³
<span>These organisms are called autotrophs. Autotrophs are also called 'self-feeders,' and they are able to produce energy from sunlight and carbon dioxide and are therefore known as 'producers.' The only autotrophs that we know of are plants and some types of algae. This makes all other organisms heterotrophs</span>
