quiz 5 ch 14

Question 1

exploitation

Answer 1

one organism makes a living at the expense of another to increase the fitness on one individual and reduce fitness of exploited

Question 2

exploit(ers)

Answer 2

predators
parasites
parasitoids
pathogens

Question 3

parasites that alter host behavior

Answer 3

horsehair worms on crickets to get to birds.

rust fungus on rockcress

Question 4

bolting

Answer 4

plants growing and flowering

Question 5

rust fungus on rockcress

Answer 5

attack meristematic tissue in rosette stage.
when rosettes bolt they have bright yellow leaves which is actually the fungus.
since the plant doesn’t flower there are no leaves

Question 6

cycles of abundance in snowshoe hares and predators

predictions

Answer 6

elton: abundance cycles driven by variation in solar radiation.

Keith: overpopulation causes decimation by disease/ parasites, high phycological stress, station due to reduced food.

Question 7

cycles of abundance in snowshoe hares and predators

result

Answer 7

when hare population increases it leads to decreased food supply.
starvation and eight loss leads to an increase in predation.
lower population size

Question 8

reciprocal effects

Answer 8

oscillations in both populations

Question 9

suppression by predator/parasites leads to

Answer 9

host not reaching carrying capacity

Question 10

laboratory experiments to test population cycles have led to

Answer 10

failure due to quick extinction of one population

Question 11

examples of failed laboratory experiments

Answer 11

adzuki bean weevil and parasite wasp.

paramecium aurelia nd yeast

Question 12

refuge

Answer 12

situation high exploited population have some protection from predators/ parasites

Question 13

importance of refuge

Answer 13

for host/ prey to persist, however it is not inaccessible

Question 14

spatial refuge

Answer 14

place providing protection from predators/ parasitoids

Question 15

examples of spacial refuge

Answer 15

air, land, water, burrows, trees, etc

Question 16

Gause: experiment for population cycles of P. caudate and didinium nasutum

Answer 16

didinium consumed all paramecium leading to both becoming extinct. when a refuge was added, some paramecium survived but didinium became extinct.
when he stimulated immigration there was an oscillation in predator/ prey populations.

Question 17

predator satiation is a

Answer 17

defense strategy.

due to high density providing protection from predators

Question 18

large body size can be known as

Answer 18

refuge

large size = less profit