Which of the following is the correct sequence of these events in the origin of life?
I. formation of protobionts
II. synthesis of organic monomers
III. synthesis of organic polymers
IV. formation of DNA-based genetic systems
a) III, II, I, IV
b) I, II, III, IV
c) I, III, II, IV
d) IV, III, I, II
e) II, III, I, IV
Answer: e) II, III, I, IV
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Auxin has an effect on plant embryos much like the Bicoid protein in Drosophila. If auxin were added to a culture of embryonic root cells, what would be the likely result?
A) Root cells would elongate and mature. B) Root cells would change into meristem cells. C) Root cells would halt their development. D) Root cells would not respond to auxin.
Open (compound)
What will be an ideal response?
Mollicutes, in the phylum Tenericutes, includes all bacteria that lack walls and do not synthesize peptidoglycan precursors.
Answer the following statement true (T) or false (F)
________ is the first product of the Krebs cycle
Fill in the blank(s) with correct word