Mendel’s principle of independent assortment is explained by which metaphase I event?
a. separation of homologous chromosomes
b. crossing-over
c. synapsis
d. cytokinesis
e. random orientation of homologous chromosomes on the metaphase plate
e
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Male peacocks have tail feathers that make up about 60% of their body length. During the mating season they contract muscles to shake these feathers in front of females; females evaluate the feather rustling as part of selecting their mate
The __________ is the mechanistic cause of this behavior; the ___________ is the adaptive function of this behavior. A. mate choice; ability to shake the tail B. ability to shake the tail; mate choice C. female evaluation of the behavior; ability to shake the tail D. ability to shake the tail; female evaluation of the behavior
The ability of retroviruses to induce tumors is related to which enzyme?
a) Reverse transcriptase b) RNA polymerase c) DNA polymerase d) Protease
Sam works in construction and stepped on a sharp nail. He can't remember the last time he had a tetanus shot. What type of immunity is the most important for him to receive?
A. artificial passive immunity B. natural passive immunity C. natural active immunity D. artificial active immunity
What type of cartilage is found at the ends of the long bones?
A. spongy B. compact C. hyaline cartilage D. fibrocartilage E. elastic cartilage