What are species that have the most impact on the structure of a community?
a. pioneer species
b. keystone species
c. foundation species
d. climax community
c. foundation species
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Which of the following reactions is most likely to be exergonic? Select all correct choices
A. the synthesis of a phospholipid from glycerol and fatty acids B. the replication of DNA from free nucleotides C. the formation of cellulose from individual glucose molecules D. the digestion of protein from food into amino acids
Four of the five answers listed below follow a
type III survivorship curve. Select the EXCEPTION.
a. most insects b. most reptiles c. many fishes d. humans e. most marine invertebrates
Extensive epiphytes are found in the tropical dry forests. Indicate whether the statement is true or false
A scientist wants to examine living cells lining the respiratory tract to determine how the cells use tiny hairs to move dirt and mucus away from the lungs. Which of the following instruments would be best, and why?
A) a light microscope, because it allows observations of whole, live cells B) a transmission electron microscope, because it has high resolution C) a scanning electron microscope, because it can reveal structures on cell surfaces D) a scanning electron microscope, because it can be used to observe whole cells without slicing them