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
B
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Kinetic energy is the energy of which of the following?
a. position b. motion c. chemical bonds d. light
Meeting the needs of the present generation without reducing the ability of future generations to meet their own needs is the goal of
a. sustainability b. ecology c. conservation biology d. sociology e. biology
Which of the following is NOT true of CAM
plants?
a. they are most like C4 plants in their photosynthetic metabolism b. the light-independent reactions begin at night c. they fix carbon only during the night d. they include the cacti and succulents e. they use rubisco
Mtl, polA, and xyl are bacterial genes that can be transmitted using an Hfr strain. An interrupted mating experiment resulted in xyl exconjugants appearing at 7 minutes and reaching maximum level by 30 minutes
The mtl gene function exconjugants appeared at 11 minutes and leveled off at 80% maximum by about 33 minutes, while polA did not appear until 24 minutes into the experiment and then only slowly rose to about 30%. Which of the following shows the gene order with the insertion site (arrow) location correctly? A) xyl mtl polA ? B) polA mtl xyl ? C) mtl xyl polA ? D) mtl polA xyl ? E) None of these