what c. homogeneous d. random e. uniform 18. The sum total of an organism\'s use
ID: 48516 • Letter: W
Question
what c. homogeneous d. random e. uniform 18. The sum total of an organism's use of the biotic and abiotic resources of its environment is called its a. habitat. b. logistic growth. c. biotic potential d. microclimax. e. niche 19. Which of the following is incorrectly paired? a. temperature deciduous forest--a warm- cold seasonal climate, moderate to high rainfall, moderate to high density of animal life, a variety of plants b. temperate grasslands--relatively cold, occasional drought and fires c. chapparal--coast lines, mild and wet winters, hot and dry summers, frequent summer fires d. savanna-long and extremely cold winters, conifers dominate the landscape 20. In a food web consisting of grass, grasshoppers, sparrows, and hawks, the grasshoppers are a. primary consumers. b. primary producers. c. secondary consumers. d. secondary producers. e. detritivores 21. Predation by human hunters differs from natural predation in that hunters a. do not regulate the size of the prey b. often select prey from the healthiest c. help to increase the fitness of the prey d. have a more serious influence on the population. portion of a population. population. structure of the prey population ageExplanation / Answer
18.(e)
Sum total of an organism's use of biotic and abiotic resources of its environment is called Niche
19.
(d) Savanna is dominated by large number of trees and is most threatened by fires
20.(a)
Grass ---> Grasshoppers ---> Sparrows ---> Hawks
Grasshoppers feed on grass (Producers) so they are Primary consumers , Sparrows are Secondary consumers and Hawks are Tertiary consumers.
21. (b) , (d)
Human hunters always select the healthiest portion of the population as their prays because it will provide more meat or more resources .
Age structure is affected because most of the times the hunters catch the healthy parent so the age structure of population is affected.
22.(a)
Competition for food , light and space among species will be highest if they are closely related and occupy the same niche.
23.(b)
The logistic model shows that population grows more slowly as it nears its carrying capacity. So the number of offspring that will live to maturity and reproduce will be around 2.
24.(c)
Siince a flea lives on the cat(host) as well as feeds on it so this is an example of Parasitism
25.(a)
The growth for human race in 2000 years is exponential growth
26.
The amount of energy transferred from one trophic level to next trophic level is 10%
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