What change does binding of the sperm membrane to the oocyte membrane elicit?
a. The oocyte dispels its nucleus.
b. The oocyte begins cleavage.
c. The oocyte completes meiosis II.
d. The sperm returns back to the oviduct.
e. The sperm releases a polar body.
c
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The most important mineral nutrients added to soils in fertilizers are
A. nitrogen, phosphorous, and potassium. B. calcium and nitrogen. C. magnesium, phosphorus, and iron. D. sulfur. E. calcium carbonate.
What structure may have acted as a boundary for a cell-like environment before protocells formed?
a. acidic water from volcanic springs b. chambers in rocks c. metal ions from rocks d. clay e. lipid membrane
A chromosome that has been broken and rejoined in
a reversed sequence has undergone a. inversion. b. deletion. c. duplication. d. translocation. e. aneuploidy.
Long-distance electrical signaling in the phloem has been shown to elicit a change in all of the following except
A) rapid leaf movement. B) gene transcription. C) a switch from C4 to C3 photosynthesis. D) gene transcription. E) phloem unloading