The cell wall ____
a. provides physical support for plant cells
b. controls the transport of materials out of the cell
c. replaces the plasma membrane in plant cells
d. is found in all eukaryotes
e. prevents the transport of toxic substances into the plant cells
ANSWER: a
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Which of the following is a region of DNA at the end of a linear chromosome?
A. Telomere B. Intron C. Exon D. Primer
A newly discovered multicellular organism obtains food by digesting dead organisms. Such an organism is most likely a member of the kingdom ________
A) Plantae B) Fungi C) Protista D) Animalia
The energy source of photosynthesis is
A. oxygen. B. sunlight. C. carbon dioxide D. chlorophyll. E. glucose
Tight junctions contain
A. occludins and connexins. B. cadherins and claudins. C. claudins and integrins. D. cadherins and integrins. E. occludins and claudins.