D, think of it like a house.
Frogs are amphibians, which means they need to live in both water and land.
They are adapted to hop on land with their feet, and their tongue to eat.
The reason frogs have lungs and also breathe through skin is so they can breathe in both of their habitats
The answer for the first question is
1. 5ml
The answer for the second question is
2. 4g/ml
<span> protozoa, algae and fungus-like </span><span>protists
I hope this helps!</span>
Answer:
Answer is C.
Explanation:
A. The vessel length is pretty much constant. The body can't length or shorten blood vessels.
B. Blood viscosity is also fairly constant because the composition of blood cannot change quickly enough to change resistance as needed.
C. This is the main way resistance is controlled. The smooth muscle surrounding blood vessels can rapidly respond to hormonal or metabolic stimuli and contract/relax to adjust diameter.
D. Again, temperature is fairly constant in the body and would not be a good way to alter resistance.
