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Gops Gops
wrote...
Posts: 38
Rep: 1 0
6 years ago
que-1
Humans have the following K-selected life strategies. Which of the following is not a K-selected strategy?
Select one:
a. a relatively high reproductive rate
b. a relatively large body size
c. long life spans
d. parental care of young

que-2
The global population from the time period 4000 B.C.E.  to  1700 C.E., and from the time period 1700 C.E. to 2000 C.E. represents, respectively,
Select one:
a. exponential growth and J-curve growth
b. J-curve and S-curve growth
c. lag phase and exponential growth
d. exponential and logistic growth

que-3
All the following can be considered examples of r-selected organisms except
Select one:
a. fairy shrimp, minnows, zooplankton
b. deer, wild horses, mountain goats
c. mosquitoes, house flies, wasps
d. algae, geraniums, petunias (annuals)

que-4
K-selected populations typically show all the following characteristics except
Select one:
a. they show great care toward offspring
b. they live close to the carrying-capacity of their habitat
c. they have short life spans
d. they have a small number of offspring

que-5
The rapidly growing human population is endangering populations of K-strategists while favouring r-strategists. Examples of K-strategists and r-strategists are, respectively,
Select one:
a. mosquitoes and polar bears
b. cockroaches and dandelions
c. elephants and spruce trees
d. whales and houseflies
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Replies
wrote...
Staff Member
6 years ago
que-1
a. a relatively high reproductive rate

Explanation;

r-selected = Unstable environment, density independent
k-selected = Stable environment, density dependent interactions

Characteristic                             r                  K

Number of offspring                 high               low
Parental care                                 low              high
Reproductive Maturity                early              late
Size of offspring                        small             large
Independence at birth                early             late
Ability to learn                        low             high
Lifespan                                        short             long
Early mortality                        high             low

que-2
a. exponential growth and J-curve growth


que-3
 i think
b. deer, wild horses, mountain goats

que-4
c. they have short life spans

que-5
a. mosquitoes (r-strategist) and polar bears (k-strategist)
b. cockroaches (r-strategist) and dandelions (r-strategist)
c. elephants (k-strategist) and spruce trees (k-strategist)
d. whales (k-strategist) and houseflies (r-strategist)
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