Atmospheric levels of carbon dioxide have rapidly increased since the industrial revolution. One effect of increased atmospheric CO2 is global warming. What effect does increased CO2 have on plants?
A. some crops such as tomatoes and cucumbers may experienced enhanced growth rates
B. C4 photosynthesis may become more important than C3 photosynthesis
C. plants may be able to absorb carbon dioxide even with their stomata closed
D. plants may no longer need light for photosynthesis
Answer: A
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All Prochlorococcus strains contain
A) chlorophylls a and b. B) chlorophyll a and phycobilins. C) chlorophyll b and phycobilins. D) chlorophylls a and b and phycobilins.
You are studying genes in yeast and find that the genes can be placed into four groups that tend to be inherited together. From this you can conclude that yeast
A. have four chromosomes. B. have four loci. C. have four alleles. D. have four genes. E. produce four cells during meiosis.
Could two phenotypically normal parents have an affected child?
a. Yes b. No
When considering the biomass of a photosynthetic organism for energy transfer studies, which of the following best explains why it is necessary to use the dry mass rather than the wet mass to determine productivity?
(A) The wet mass can vary widely due to differing concentrations of minerals in soil (B) The mass that is produced and added to the organism does not include the mass of water (C) Water has no caloric value (D) Water plays no role in primary productivity