Biologists think that the first photosynthetic cells
a. used water as an electron donor.
b. were the first living cells to develop.
c. lived more than 2.8 billion years ago.
d. released hydrogen into the atmosphere.
e. required oxygen rather than carbon dioxide.
C
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____ is the study of body plans and structures
among groups of organisms. a. Embryology b. Molecular archeology c. Evolution d. Comparative morphology e. Composition
Abscisic acid promotes bud and seed __________,
and it limits water loss by promoting stomatal closure. Fill in the blank(s) with the appropriate word(s).
Most of the protein eaten by the mother during the third trimester of pregnancy is used for fetal brain and
____________________ system growth and development Fill in the blank(s) with the appropriate word(s).
As a microbiologist you have been asked to investigate the regulation of a novel gene in a bacterial species. Given what is known about bacteria, the logical place to begin your investigation is
A. alternative splicing regulation. B. regulation by enhancer elements. C. regulation by general transcription factors. D. transcriptional regulation. E. translational regulation.