Answer:
The membrane is selectively permeable because substances do not cross it indiscriminately.
Explanation:
1. an atom
2. compound
3. both
4. atom
Answer:
endocytosis
Explanation:
hope this helps if it does please mark brainliest
Answer:
Sadness is caused when there is a strong emotional reaction to a particular object.
Sadness can sometimes lead to depression, but more commonly sadness can make you feel tired, angry, or stressed.
Explanation:
