Envir. Sci. Ch 8 Understanding Populations Test (with potential answers) Tolbert

Thick fur on deer is not an example of coevolution. Why?

It is an example of adaptation and only involved one species. Coevolution involves at least two species.

An example of a population is

all maple trees in a forest

Which of the following statements is correct?

an organisms niche is only part of its habitat that it eats

The number of wild horses per square kilometer in a prairie is the horse populations

density

A true statement about parasitism is that parasites

feed off of and harms their hosts but not necessarily kills it (prefers that it lives, but will be weakened)

If over a long period of time, each pair of adults in a population had only two offspring and the offspring lived to reproduce, the population would

grow exponentially as long as there was enough food, space, no competition/predation

The carrying capacity of an environment for a particular species at a particular time is determined by the

limiting resource

In which of the following relationships is neither species harmed?

mutualism/commensalism

The relationship between acacia trees and the ants that live on them is an example of

mutualistic relationship where both benefit

The relationship between a Canadian Lynx and a snowshoe hare is an example of

predator-prey (predation)

Which of the following organisms has the highest reproductive potential?

sea turtles, bacteria, insects, fish (animals that reproduce in large number at earlier ages and don't expect many to survive)

Which of the following would most likely cause a large number of density-independent deaths in a populations?

severe weather, natural disasters, winter storms

Which of the following is one of the main properties used to describe a population

size, density, or dispersion

The density of a population is

the number of individuals per unit area or volume

A species of plant has exponential growth after it is introduced into an area where it has never lived. Which statement best describes exponential growth?

when a population has few limits to its growth

Which of the following populations has a random dispersion?

(Look for something that is neither EVENLY distributed or CLUMPED) it should look RANDOM (no pattern)

Which of the following is NOT an example of exponential growth?

(looking for something that didn't growth/increase each generation)

Which of the following has the greatest effect on reproductive potential?

(maximum number of offspring a member of a population can produce) reproducing more offspring per time; reproducing more often; reproducing earlier in life stage

A female dog's niche includes all of the following EXCEPT

(niche is anything that has to do with the organism's patter of use of its habitat)

Each of the following is an example of a parasite except

(these are examples, so pick anything but these: ticks, intestinal worms, fleas, tapeworms, heartworms, bloodsucking leaches, mistletoe, flukes)

Which of the following statements explains why the growth of orchids on the high branches of tropical trees is an example of commensalism?

The orchid benefits from the relationship but the tree is neither harmed nor benefits.