1. Sea stars live in saltwater ecosystems. Some species live in shallow tidal pools, while others live in the deepest parts of the oceans. This is a description of the ____ of sea stars. (1 point)
habitat
community
niche
none of these
2. Cougars are predators that often eat weakened or diseased animals. This is a description of the _____ of cougars.
(1 point)
habitat
community
niche
none of these
3. Nitrogen is released to the abiotic parts of the biosphere from the processes of death and _______. (1 point)
decay by bacteria
infiltration of groundwater
runoff
lightning in storm clouds
4. Referring to Figure 2-1, energy flows from ______.
Figure 2-1 (1 point)
coyotes to grasses
cats to mice
mice to cats
coyotes to cats
5. Carbon dioxide in the atmosphere enters the biotic parts of the biosphere through _______. (1 point)
burning of forests
photosynthesis
combustion of fossil fuels
all of these
6. What type of cycle is depicted in Figure 2-10?
(1 point)
carbon
water
phosphorus
nitrogen
7. Which organism shown in the pyramid in Figure 2-9 receives the highest percentage of energy from the sun?
(1 point)
fox
birds
grasshoppers
grass
8. What type of succession is most likely to happen in a burned forest? (1 point)
primary
secondary
tertiary
climax
9. You take a sample of species from the area labeled A in Figure 3-7. What would you expect to find?
(1 point)
almost no life
great species diversity
organisms that need very little oxygen
one dominant species of fish
10. What type of species would be most likely found in the area labeled D in Figure 3-7? (1 point)
one that requires plenty of oxygen
plants that require light
amphibians that need a warm habitat
decomposers that feed on dead organisms
11. The absence of permafrost and the presence of coniferous trees as the dominant climax plants characterize the ________. (1 point)
taiga
tundra
grassland
desert
12. Water and air pollution are examples of _____. (1 point)
habitat fragmentation
habitat degradation
edge effect
sustainable use
13. Island A has an area of 30 square kilometers. Island B has an area of 400 square kilometers. The islands are near each other. Which of the following statements is most likely to be true? (1 point)
Island A has greater biodiversity and a higher percentage of edge effect than Island B.
Island A has less biodiversity and a higher percentage of edge effect than Island B.
Island A has greater biodiversity and a lower percentage of edge effect than Island B.
Island A has less biodiversity and a lower percentage of edge effect than Island B.
14. What happened to species B in the graph shown in Figure 5-6? (1 point)
It increased in biodiversity.
It decreased in population slightly.
It became carnivorous.
It became extinct.
15. What effect did the loss of species B have on species A and D in Figure 5-6? (1 point)
It caused the populations of A and D to decrease.
It caused the populations of A and D to increase.
It caused the populations of A and D to become extinct.
It had no effect on the populations of A and D.
Note: Your teacher will grade your responses to questions 16?8 to ensure you receive proper credit for your answers.
16. Suppose in a population of 1,000 wild horses, there are 400 births and 220 deaths. Also, 180 new horses join the population from an area that was destroyed by fire, and 380 horses are captured by park rangers. Describe the overall change in this horse population. (2 points)
17. Describe how light affects life in the oceans. (3 points)
18. Describe four types of threats to biodiversity. (4 points)
habitat destruction - taking natural areas for housing, roads, golf courses, crops
habitat degradation - leaving the habitat there but making it of lower quality by such acts as pollution, acid precipitation, ....
introducing alien or non-native species that may take over the niches of
overhunting, overfishing, overcollecting as in overharvesting whales, overcollecting coral, capturing exotic birdBiology help dnt write if u gonna talk ****?It's better if you do your own homework. You'll learn more.Biology help dnt write if u gonna talk ****?%26quot;dnt write if u gonna talk ****%26quot;
Sorry, I speak English. I'm not sure what that strange language says.Biology help dnt write if u gonna talk ****?quote, ****, end quote
