Distinguish between pollination and fertilization.
What will be an ideal response?
Pollination is the transfer of pollen grains to the female reproductive structure. Fertilization is the fusion of sperm nuclei (produced with the pollen grain in seed plants) with the egg nucleus.
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How does phosphorus normally enter ecosystems?
A) cellular respiration B) photosynthesis C) rock weathering D) vulcanism E) atmospheric phosphorous gas
Which of the following is not a reason to genetically engineer crop plants?
A) disease resistance B) herbicide resistance C) drought tolerance D) decreased yield E) enhanced nutrients
The neutral subatomic particle is the ____
a. neutron b. proton c. electron d. quark e. Higg's boson
Activated by directly binding to GTP
a. Adenylate cyclase b. G-protein c. Carrier protein d. cAMP e. Ion channel receptor protein