(Question)
Q: What parts of the cell does cell differentiation involve changes in?    Choices:  - cystine and cell wall  - endoderm and epidermis  - cell membrane and nucleus  - cytoplasm and cell wall  A:
(Answer)
cytoplasm and cell wall


(Question)
Q: What kind of volcanic eruptions are less deadly?    Choices:  - non-dormant  - serial eruptions  - explosive  - non-explosive  A:
(Answer)
non-explosive


(Question)
Q: How many neutrons do 99% of carbon atoms have?    Choices:  - sixteen  - five  - eight  - six  A:
(Answer)

six