Hybridization of closely related plant species by
doubling the chromosome number always results in
a. allopolyploids.
b. autopolyploids.
c. infertile hybrids that must reproduce asexually.
d. inviable hybrids.
e. hybrids that are similar to only one of their two
parents.
Answer: a
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The cells surrounding milk-producing cells in
the female mammary gland contract shortly after the female hears the cry of an infant. This is an example of a. a response that is not a behavior. b. instinctive behavior. c. imprinting behavior. d. learned behavior. e. a time-dependent form of learning.
Recent data indicate what regarding forests in eastern North America?
A) a steady increase in forest since the late 1800s B) no change over the past 200 years C) no change in the past 50 years D) a decline in forested area in the past 50 years
Identify and briefly describe the labeled structures in the cross section of the vertebrate embryo.
What will be an ideal response?
Which cluster of terms accurately reflects the nature of DNA replication in prokaryotes?
A) fixed point of initiation, bidirectional, conservative B) random point of initiation, unidirectional, semiconservative C) fixed point of initiation, bidirectional, semiconservative D) fixed point of initiation, unidirectional, conservative E) random point of initiation, bidirectional, semiconservative