Plasmodesmata can change in number, and when dilated can provide a passageway for _____
A) macromolecules such as ribonucleic acid (RNA) and proteins
B) ribosomes
C) chloroplasts
D) mitochondria
A
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How would Si depletion in the photic zone of the open ocean affect the biological pump and the C cycle?
What will be an ideal response?
Compare feeding in a sponge, a cnidarian, and an annelid
What will be an ideal response?
Cloning mammals has proven to be:
a. impossible. b. easy and straightforward. c. not technically feasible at the present time. d. a technique that produces many similar-looking, deformed progeny. e. a process with a low success rate and a high incidence of genetic defects.
Monotremes differ from the other mammals in their
A. fur. B. laying of shelled eggs. C. containing a pouch for young to live. D. lack of milk-producing glands. E. carnivorous nature.