A radula is which of the following?
a. foot
b. feeding organ
c. ear
d. sensitive hair
e. balance organ
Answer: b
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A strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone would have a mutation in the gene that encodes for
Wild type bread mold can grow in a minimal medium without supplements, while certain mutated strains can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis. See the figure below for an overview of the arginine biosynthetic pathway.
A. enzyme 1.
B. enzymes 1, 2, and 3.
C. enzyme 2.
D. The strain would be the wild type with no genetic mutations.
E. enzyme 3.
F. enzymes 1, 2, and 3.
G. The strain would be the wild type with no genetic mutations.
The ocean is frequently referred to as:
a. circumpolar ocean. b. seven seas. c. world ocean. d. Indo-Pacific Ocean. e. the cradle of civilization.
Which of the following terms refers to the change in
relative day length? a. phytoerythrin b. phototropism c. photorhythmic d. photochrome e. photoperiodism
Why are the sterile transgenic salmon of concern for local streams?
A) Transgenic salmon may introduce resistant bacteria to the ecosystem. B) Transgenic salmon may cause eutrophication of the local streams. C) Transgenic salmon may spread cancer-causing genes in the fish population. D) Transgenic salmon may still reproduce with wild species and disrupt the food web.