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Chapter 53: Q3TYU (page 1188)

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx has revealed that

(A) predation is the dominant factor affecting prey population cycling.

(B) hares and lynx are so mutually dependent that each species cannot survive without the other.

(C) both hare and lynx population sizes are affected mainly by abiotic factors.

(D) the hare population is r-selected and the lynx population is K-selected.

Short Answer

Expert verified
  1. The statement 鈥減redation is the dominant factor affecting prey population cycling鈥� is true.
  2. The statement 鈥渉ares and lynx are so mutually dependent that each species can not survive without the other鈥� is false.
  3. The statement 鈥渂oth hare and lynx population sizes are affected mainly by abiotic factors鈥� is false.
  4. The statement 鈥渢he hare population is r-selected, and the lynx population is K-selected鈥� is false.

Step by step solution

01

Snowshoe hare

The species of hare or rabbit primarily found in the boreal forest of North America and which acts as a source of wild meat for predators like lynx is called snowshoe hare.

02

Explanation of option ‘(A)’

In ecological science, the act in which one animal preys on the other to kill and feed on it is called predation.

Thus, 95% of prey death is due to the act of predation.

Therefore, the given statement is true.

03

Explanation of option ‘(B)’

The medium-sized wild cat mainly found in the boreal forest whose primary food is snowshoe hare is called lynx.

Thus, the snowshoe hare and lynx can survive without each other; lynx have other food resources for their survival.

Therefore, the given statement is false.

04

Explanation of option ‘(C)’

The weather, like rain, is considered an abiotic factor affecting the prey and predator population.

Thus, the abiotic factor does not affect the snowshoe hare and lynx population.

Therefore, the given statement is false.

05

Explanation of option ‘(D)’

The physical characteristics of snowshoe hare are furry feet and a snow-white winter coat. Some physical features of lynx are hairy soles, long-legged, and short heads.

Thus, the life-history strategy is not looked at in the scientific study of the population of both the prey and the predator.

Therefore, the given statement is false.

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Most popular questions from this chapter

You are testing the hypothesis that increased population density of a particular plant species increases the rate at which a pathogenic fungus infects the plant. Because the fungus causes visible scars on the leaves, you can easily determine whether a plant is infected. Design an experiment to test your hypothesis. Describe your experimental and control groups, how you would collect data, and what results you would see if your hypothesis is correct.

To estimate which age cohort in a population of females produces the most female offspring, you need information about the number of offspring produced per capita within that cohort and the number of individuals alive in the cohort. Make this estimate for Belding鈥檚 ground squirrels by multiplying the number of females alive at the start of the year (column 2 in Table 53.1) by the average number of female offspring produced per female (column 5 in Table 53.1). Draw a bar graph with female age in years on the x-axis (0鈥�1, 1鈥�2, and so on) and total number of female offspring produced for each age cohort on the y-axis. Which cohort of female Belding鈥檚 ground squirrels produces the most female young?

Which of the following statements about human populations in industrialized countries is incorrect?

(A) Birth rates and death rates are high.

(B) Average family size is relatively small.

(C) The population has undergone a demographic transition.

(D) The survivorship curve is Type I.

MAKE CONNECTIONS Negative feedback is a process that regulates biological systems (see Concept 40.2). Explain how the density-dependent birth rate of dune fescue grass exemplifies negative feedback.

WHAT IF? Given the latitudinal differences in sunlight intensity (see Figure 52.3), how might you expect the carrying capacity of plant species found at the equator to compare with that of plant species found at high latitudes?
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