Which of the following threats to biodiversity is involved in the majority of the cases?
a. habitat loss
b. global climate change
c. introduction of exotic species
d. overharvesting
Answer: a. habitat loss
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Hemophilia results from a deficiency in
A. platelets, and results in normal bleeding. B. fibrin, and results in abnormal bleeding. C. plasma, and results in abnormal bleeding. D. collagen, and results in normal bleeding. E. clotting factor VIII, and results in abnormal bleeding.
The ecological role of nematodes includes: a. population management of diatoms
b. being a scavenger. c. being a key to benthic communities. d. being numerous.
Unsaturated tails of lipids
a. are hydrophilic. b. are stable and tend to break apart. c. give the membrane a fluid quality. d. will break whenever exposed to phosphate ions. e. act as carriers.
During a malaria infection, Plasmodium falciparum grow inside of human cells as
A. autotrophs. B. heterotrophs. C. phototrophs. D. heterotrophs and autotrophs. E. autotrophs and phototrophs.