In some species, such as Steller sea lions, a sexual polymorphism for longevity is observed, with females liv-ing on average several years longer than males. Use an evolutionary explanation of senescence to explain this polymorphism
a. Males have a higher mutation rate than females.
b. Males have higher age-specific fertility at older ages than females.
c. Sexual selection imposes a more severe trade-off between fitness and longevity in males than in females.
d. Males do not need to live as long as females to attain the same fitness.
C
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The differences among individuals in the number of copies of a region of a genome are known as:
A. RFLP B. SNP C. PCR D. CNV E. SINE
Which of the following bacteria is both photosynthetic and Gram-positive?
A. Purple bacteria B. Cyanobacteria C. Heliobacteria D. Green bacteria E. None of the choices are correct.
When two different species require the same resources we may observe
a. intraspecific competition. b. resource partitioning. c. interspecific competition. d. predation. e. symbiosis/parasitism.
IN SEX REPRODUCTION, GENETIC VARIATION IS ACCOMPLISHED BY ALL EXCEPT?
What will be an ideal response?