Phycobilins are
a. photosynthetic pigments.
b. found in the red algae.
c. blue and red pigments.
d. all of the above.
b
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The G1 checkpoint is used to determine which of the following?
a. if DNA replication has finished b. if the chromosomes have lined up at the metaphase plate c. if sister chromatids are attached to spindle microtubules properly d. if adequate reserves and cell size have been reached
Ingesting lactic acid bacteria to prevent colonization by intestinal pathogens such as Salmonella enterica during antibiotic therapy is an example of ________.
A) chemotherapy B) vaccination C) probiotics D) parasitism E) opportunism
Figure 17.5
As the trees in England become less sooty due to pollution controls on factories, which of the moths in the accompanying figure will be selected against?
A. The dark moth on the dark tree B. The light moth on the light tree C. All of the light moths equally D. The dark moth on the light tree E. All of the dark moths equally
The fluid that covers the brain and spinal cord is ____.
A. part of the meninges B. part of a rapid type of nerve conduction C. involved in reflex actions D. involved in the "jumping" of impulses E. called cerebrospinal fluid