In the 1950's, Japanese scientists studying a group of macaques habituated the animals to their presence by providing them with sweet potatoes
A young female, who was given the
name Imo by the scientists, began washing the sand and grit off her sweet potatoes by
rinsing and rubbing them in a nearby stream. Now, 60 years later, all the macaques in the
troop wash their sweet potatoes—only now they wash them in the ocean. This is likely an
example of learning by:
A. classical conditioning.
B. imitation.
C. non-association.
D. habituation.
E. sensitization.
B
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In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young and the old. What conclusion is best supported by this data?
A. A limited program should be established to cull the sheep population. B. Wolf predation would not be expected to dramatically reduce the sheep population. C. The wolf population is at its carrying capacity, so it is no threat to the sheep population. D. A limited program should be established to cull the wolf population. E. Dall mountain sheep in Denali are an r-selected population.
Mendel observed that some genetic traits seemed to mask others in the pea plants, and used the term ___ to describe these traits.
a. dominant b. homologous c. heterozygous d. recessive e. homozygous
In a hypotonic solution, a plant cell will ________
A) undergo plasmolysis B) become flaccid C) burst D) become turgid
For a particular character, natural selection can favor an average phenotype or extreme phenotypes. In order to do this, a character must be:
A) controlled by a dominant allele for a gene. B) under the control of many genes. C) under the control of only two alleles for a gene. D) not under the control of any genes.