Calico cats are never male because:a
recessive genes are not usually expressed on their X chromosome.
b. male hormones prevent expression of the calico phenotype.
c. two different X chromosomes are needed for the expression of the calico phenotype.
d. two different Y chromosomes are needed for the expression of the calico phenotype.
e. one X chromosome and one Y chromosome are needed for the expression of the calico
phenotype.
C
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Which one of the following is the organ of the inner ear that contains hair cells which convert fluid pressure waves to nerve impulses?
A. vestibular System B. semicircular canals C. organ of Corti D. statolith
A proteome is the set of ____________________ present in a particular cell at a specific time under a particular set of conditions
Fill in the blank(s) with correct word
Dense, regular tissues that connect bone to bone are called
a. muscles. b. cartilage. c. ligaments. d. tendons. e. organelles.
DDT was once considered a "silver bullet" that would permanently eradicate insect pests. Instead, DDT is largely useless against many insects. Which of these would have prevented this evolution of DDT resistance in insect pests?
A) All habitats should have received applications of DDT at about the same time. B) The frequency of DDT application should have been higher. C) None of the insect pests would have genetic variations that resulted in DDT resistance. D) DDT application should have been continual.