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Bio 3300 Final exam questions with correct answers
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Bio 3300 Final exam questions with correct answers
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Bio 3300 Final exam questions with correct answersLife History Trait Correct Answer ✓✓ Aspects of the natural history of
an organism that are related directly to survival and reproduction
LHT examples Correct Answer ✓✓ - Age of first reproduction
(maturity)
- Number of reproductive events and frequency (parity)
- Number and size of offspring (fecundity)
- Longevity (life span)
Energy allocation Correct Answer ✓✓ Total Energy =
Maintenance+Storage+Growth+Reproduction
LHT trade-off Correct Answer ✓✓ Resources are used for one function
cannot be used for another function
- Balance present investment with future reproductive success
- Reproduction vs. growth
Perfect LHT Correct Answer ✓✓ - Mature at birth
- Continually reproduce (no down time)
- High quality offspring
- Large number of offspring
- Live forever
,Senescence Correct Answer ✓✓ Decreased fertility and probability of
survival + aging
Rate of living theory Correct Answer ✓✓ Populations lack genetic
variation to respond to aging (already selected for the longest living
individuals and cannot select for indivs who live longer)
Individuals selected to maximally resist cell damage and repair
cell/tissue (set amount of energy and at physiological limit)
RLT Predictions Correct Answer ✓✓ - Rate of aging corresponds to
metabolic rate
(NOT clear)
- Can't increase longevity through further selection
( Most likely)
Telomeres Correct Answer ✓✓ Repeated DNA sequences at the ends of
chromosomes
Limit how many times a cell can divide
Telomerase Correct Answer ✓✓ An enzyme that lengthens the lost
sequence of telomeres at the 5' end. The enzyme includes a molecule of
RNA that serves as a template for new telomere segments.
Mutation accumulation hypothesis Correct Answer ✓✓ Effect of natural
selection late in life are weak, aging alleles only mildly deleterious
, Deleterious alleles accumulate but do not have an effect until later in life
Deleterious mutations accumulate because N.S. stops selecting for
adaptive alleles
Antagonistic pleiotropy hypothesis Correct Answer ✓✓ Senescence is
largely due to the accumulation of mutations that increase survival or
reproduction early in life at the cost of deleterious effects late in life
Trade-off between repair and reproduction
Reproductive Strategies Correct Answer ✓✓ Behaviors or behavioral
complexes that have been favored by natural selection to increase
individual reproductive success.
Lack's hypothesis Correct Answer ✓✓ Selection will favor the clutch
size that produces the most surviving offspring
Assumes offspring survival decreases with increasing clutch size and no
trade-offs
Altricial young Correct Answer ✓✓ Describes organisms that are not
very developed when born and that require care or nursing (less
incubation)
Precocial young Correct Answer ✓✓ Young animals born in a relatively
mature state of development (more incubation)
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