When defining terrestrial biomes, which of the following information is most useful?
a. chemical resources of the soil
b. average temperature and rainfall
c. salinity of the water
d. average energy available
e. number of animal species present
Ans: b. average temperature and rainfall
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Which hypothesis explains why most examples of sexual dimorphism result in males with more elaborate decorations than females?
a. Females cannot exhibit elaborate decorations because they must protect their eggs. b. Males are always physically larger and stronger than the females of the same species. c. Males experience greater variance in reproductive success than females in those species. d. Decorations displayed by males originate in genes absent from X chromosomes.
Which phenotypic ratio is likely to occur in crosses of two completely dominant, independently segregating gene pairs when both parents are fully heterozygous?
What will be an ideal response?
What happens to neurons in the approach known as optogenetics?
A) Mutations to ion channel proteins are corrected. B) The neurons are made to express light-sensitive ion channels. C) Neurotransmitter stores are depleted. D) Fusion of neurotransmitter vesicles to the presynaptic membrane is blocked. E) Leakage of cytoplasmic polyanions is blocked.
Using an alcohol pad before taking a blood sample is an example of antisepsis.
Answer the following statement true (T) or false (F)