Answer:
3. Size could
4. Beak's are advantageous because they have to be fit to eat the seeds that they need
Explanation:
size can affect because the bigger birds can fight the smaller birds off when they are eating the same product. Even with same beaks bigger birds will have an advantage.
The best answer would be "research reasons why species change over long periods of time"
if not i apologize but this is my best guess<span />
Serine, threonine, and tyrosine are most commonly phosphorylated in eukaryotes.
I think the answer is D. Circulatory because this system helps to get the absorbed nutrients throughout the whole body
thylakoids
Chloroplasts contain saclike photosynthetic membranes called thylakoids, which are interconnected and arranged in stacks known as grana. Pigments are located in the thylakoid membranes. The fluid portion outside of the thylakoids is known as the stroma.
