The mutation frequency is the ratio of the number of mutant alleles to the total number of alleles in a given population
Indicate whether the statement is true or false
TRUE
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Suppose you discover a new species of animal that does not have body segments, but is triploblastic, eucoelomate, and cephalized. Under the molecular phylogenetic scheme, you would allocate it to which phylum?
A. Mollusca. B. Echinodermata. C. Nematoda. D. Platyhelminthes. E. Arthropoda.
Characterize the frequency of changes in chromosome number in humans
A. Close to half of all conceptions are aneuploid. B. They are a major cause of reproductive failure. C. The frequency is significantly higher than it is in closely-related animals. D. All of these. E. None of these.
Amyloplasts are organelles that store:a
fat.
b. starch. c. protein. d. lipids. e. DNA
When two frog species, Rana pippins and Rana sylvatica, mate, the offspring die early in embryonic development. This is an example of ___________.
A. Hybrid sterility B. Reduced hybrid fertility C. Mechanical isolation D. Reduced hybrid viability