True or False: Neutrophils present in higher-
than-normal numbers in blood or at a site of inflammation indicate an active response to a current infection
a. TRUE
b. FALSE
Answer: A
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In the lab you isolate a Chlorella mutant that is unable to switch xanthophyll pigments into the inactive, non-heat-dissipating form. If you released that mutant into a small pond shaded by trees, would the mutation spread, and why?
A. No, light absorbed by xanthophylls is not used to make ATP or NADPH. B. No, the xanthophylls prevent the production of reactive oxygen species. C. Yes, the xanthophylls prevent the production of reactive oxygen species. D. Yes, the heat released by the xanthophylls would warm up the cells and enhance photosynthesis. E. No, mutations never spread in nature.
The human respiratory surface consists of
a. the walls of alveoli and pulmonary capillaries b. the walls of alveoli and pulmonary capillaries and their basement membranes c. the walls of bronchioles, alveoli, and capillaries d. the walls of bronchioles, alveoli, capillaries, and their basement membranes e. the walls of alveoli
Epiphytes are non-parasitic plants growing in the tree canopy, and they demonstrate that _____ is a strong limiting factor to plant growth in the rainforest.
Fill in the blank(s) with the appropriate word(s).
The way in which DNA, RNA, and proteins are all involved in putting genetic information into action in living cells is called
a. transcription b. viral transfer c. translation d. gene expression