The repeating sequence of cells dividing, growing, and dividing again is called
A) homologous differentiation. B) the cell cycle.
C) stem cell differentiation. D) fission.
B
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A cuboidal shaped cell with six sides is 1mm X 1mm X 1mm. What is the volume and the surface area of the cell?
A. 1mm3 : 6mm2 B. 3mm3 : 3mm2 C. 1mm3 : 3mm2 D. 3mm3 : 1mm2 Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about area and volume of a cube? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Cellular pH is kept near a value of 7 because of
a. salts. b. buffers. c. acids. d. bases. e. water.
Transcription starts at a region of DNA called a(n)
a. sequencer. b. promoter. c. activator. d. terminator. e. transcriber.
Why do some scientists consider automixis sexual reproduction?
a. It results in only heterozygous gametes. b. It allows for crossing-over. c. It can turn back Muller's ratchet. d. It reshuffles variation that originated in a bisexually reproducing popula-tion. e. B and C.