particularly during DNA
replication and mitosis, are involved in crossing over during ____ of meiosis.
a. prophase II
b. prophase I
c. metaphase II
d. metaphase I
e. telophase II
ANSWER: b
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If one reproductive strategy of a eukaryotic organism is gamete fusion, what can be concluded about that organism?
A. The organism reproduces asexually. B. Progeny organisms are identical to each other. C. The organism participates in vertical gene transfer. D. The organism participates in horizontal gene transfer.
An egg rolling out of its nest is a(n) _______ to a nesting goose.
A. conditioned response B. reproductive habituation C. sign stimulus D. gene expression E. operant conditioning
A cover, or ________, is used by certain gastropods when they retreat into their shell and close the opening
a. operculum b. periostracum c. univalve d. radula
A positive effect associated with pesticide usage is
1.killing disease-causing insects. 2.killing some pathogens. 3.increasing food supplies. 4.increasing profits for farmers. 5.all of the choices