Collectively, what did the work of Charles Darwin, Francis Darwin, and Fritz Went demonstrate about phototropism in plants? Select all correct choices

A. A chemical signal is produced in shoot tips
in response to light.
B. A chemical signal is produced in shoot
stems in response to light.
C. Cells exposed to a chemical signal
produced by light will grow (elongate).
D. Cells exposed to a chemical signal
produced by light will not grow (elongate).


A,C

Biology & Microbiology

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When scientists are attempting to breed for increased ability of a plant to utilize carbon dioxide they must consider improvement of:

A. stomatal openings B. bundle-sheath cells C. mesophyll air spaces D. chlorophyll production E. stress tolerance

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A J-shaped growth curve is converted to an Sshaped

one

a. when the parents are past reproductive age. b. if the data is plotted in reverse. c. when the carrying capacity is reached. d. if reproduction is stopped. e. only for fast-growing populations such as bacteria.

Biology & Microbiology

During anaphase, homologous chromosomes separate.

a. true b. false

Biology & Microbiology

Phage typing is useful for identifying bacteria because of the specificity of (antibodies/bacteriophages/PCR) for unique bacterial structures.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology