Ecology - Organisms & Population Questions and Answers

If a population contains 29 homozygous recessives what percentage of heterozygotes would you expect A 25 C 41 B 21 D 50

7 In the age structure diagram 2 po below which of the following statements are likely for this population 295 235 118 Population in thousands 55 It is stable 1004 5 99 45 75 79 70 65 69 50 64 35 39 50 54 45 49 40 64 15 19 Age Group It is declining It is expanding 318 177 236 296 Population on thousands It is from a developing country It is from a developed country

A population of 3000 individuals experiences 99 births This amounts to a per capita birth rate of 99 0 033 0 099 30 3

A substance is released into the environment that disrupts the activity of NADP Reductase. What would be the effect of such a substance on the ecosystem? What would this mean for all levels of life within an ecosystem? Explain.

In the following population dynamic, the competitor species N₂ has a resource base that only partially overlaps that of N₁. What does this tell us about the value of the competition coefficient a? d/dtN₁=N₁ (1- N1+aN2/K1) a=0.3 a=1 a<l a>l

With the help of the context, find the meaning of the underlined word. My brother loathes pizza, but he loves hot dogs. Hates Love Like

Which of the following statements about the effects of temperature on biological processes is false? Most species can only maintain performance over the range of temperatures between Tmin and Tmax, known as the tolerance range. Because most ectotherms maintain a nearly constant body temperature, they are relatively unaffected by small changes in environmental temperature. Many aspects of individual performance vary with temperature because enzymatic performance varies with temperature. Species richness tends to increase with temperature, with more species found in the tropics than near the poles.

Which of the following are threats to primates in the wild (select all that apply)? habitat reduction caused by deforestation habitat increased caused by reforestation reduction in number of animals caused by hunting increase in the number of animals caused by reintroductions

Which of the following are benefits a high- ranking female has over low-ranking females within a group (select all that apply)? high-ranking females have fewer offspring high-ranking females have lower offspring survival rates high-ranking females have more access to resources high-ranking females have more access to mates

A newly formed canyon, mountain range, or lake are a few of the ways that the first step of________ can occur. A. speciation B. mutation. C. selective breeding C. genetic inheritance

A biologist wanted to estimate the number of endangered Blanding turtles living in a marsh. The biologist caught, tagged, and released a sample of six Blanding turtles in the marsh. After one month, the biologist captured eight Blanding turtles in the same area and found that three of them had tags, showing they were in the original sample. Based on this information, estimate the population of Blanding turtles in the marsh. Explain whether another sampling procedure would have been better for the biologist to use.

Which sentence best explains the effect of urban sprawl on water consumption? A. Water consumption drops because high-density cities use more water. B. Water consumption rises because suburban communities use more water. C. Water consumption drops because suburban communities use more water. D. Water consumption rises because high-density cities pollute water.

In a population of 5000 individuals, 600 newborns are produced annually and 800 individuals die annually. Determine the per capita growth rate of this population. (1 mark)

This type of ecological relationship is negative for both species. A. parasitism B. competition C. predation

Why do ecologists estimate populations rather than count individual members of a population? (1 mark)

There are several reasons for preserving biodiversity For example, we might preserve biodiversity to protect our agricultural interests (if bees die, we lose much of our pollinated food) and aesthetic interests (the look of a place). What is another reason to preserve biodiversity? A. Preserve the ecology (species inter-relationships) of an area B. Improve our ability to construct man-made structures, like shopping centers