Birds, unlike mammals, do not have separate exits for urine and feces. Both waste products are eliminated simultaneously through the cloaca. While mammals excrete nitrogenous wastes mostly in the form of urea, birds convert it to uric acid or guanine, which reduces water loss in comparison.
B is the correct answer I think it might be wrong tho
Protein channels ,because they help transport molecules that are to big to pass through the cell membrane
Answer:
All of the above
Explanation:
The Paleozoic Era consists of 6 different periods:
1. Cambrian
2. Ordovician
3. Silurian
4. Devonian
5. Carboniferous
6. Permian
The complexity of the human body
suggests an intelligent design to the honest observer
true
