A. umbilical cord is the answer
Answer:
The first bullet point is correct
Explanation:
The cell membrane controls what comes in and out of the cell, it needs minerals so would not block them completely, and water does not enter cells so it is clearly the first one.
<span>phenotype, genotype is the answer for the question above hope this will help.</span>
B. is the correct answer I think
Answer:
A
Explanation:
Photosynthesis produces carbon dioxide (chemical gas) which is used in cellular respiration to make oxygen. That oxygen is then used in photosynthesis to make more carbon dioxide and so on.
