How do corals react when water temperatures are too high?
A. They slow down their shell-building processes.
B. They expel their symbiotic algae.
C. They migrate to areas with lower water temperatures.
D. They produce more pigment.
E. They reproduce in large numbers.
Answer: B
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Carbon fixation carried out by the prokaryotes known as the __________ involves chlorophyll a.
Fill in the blank(s) with the appropriate word(s).
Scientists recently identified a gene that is linked with ovarian cancer. Variations in the KRAS
gene occur in one-quarter of women with ovarian cancer. Thus, KRAS is considered a __________.
a. type of stem cell b. genetic marker c. vector d. DNA profile
Mycorrhiza is a mutualistic relationship between ________
a. plant roots and fungi b. plant roots and bacteria c. green algae and fungi d. fungi and cyanobacteria e. cyanobacteria and zygomycetes
Which STDs can be successfully cured with antibiotics?
a. AIDS b. gonorrhea only c. human papillomavirus d. genital warts e. chlamydia and gonorrhea