Which human activity has directly contributed to global warming?
A) burning of coal
B) building of greenhouses
C) planting of trees
D) development of solar energy
A
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In CAM plants, such as cacti, stomata are ____
a. open during the night and closed during the day b. nearly always open c. closed only when guard cells are not exposed to sunlight d. almost never open e. open during the day and closed during the night
Metagenomic studies of prokaryotes have
revealed that
a. there is very little diversity among bacteria. b. archaea are more closely related to bacteria than to eukaryotes. c. bacteria and archaea are essentially the same organisms. d. most archaea evolved from viruses. e. none of these things were revealed by metagenomic studies
Individuals of a certain tree species experience a markedly higher mortality rate at age 200 and beyond. Name two other changes you would expect in 200-year-old trees if this increase in mortality was accompanied by senescence
What will be an ideal response?
Why does the genetic distance of 1cM not always correspond with the physical distance of 1 million bases?
What will be an ideal response?