Question

biology help

Answer 1

2. Use the food web above to predict the effects of reducing the deer population. (1 point)
trees increase; mountain lions decrease; foxes increase
grass increases; caterpillars decrease; foxes increase
trees decrease; mountain lions decrease; foxes increase
trees increase; robins increase; foxes increase

Answer 2

3. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is released as heat energy, and the rest is (1 point)
used in reproduction.
stored as body tissue.
stored as fat.
used in life processes.
4. Which of the following makes the best analogy to describe the movement of energy in an ecosystem? (1 point)
pool
lake
river
pond
5. How does the amount of energy at the fourth trophic level compare to the amount of energy at the third trophic level immediately below it? (1 point)
Energy at the fourth trophic level is approximately ten times lower than energy at the third trophic level.
Energy at the fourth trophic level is approximately two times larger than energy at the third trophic level.
Energy at the fourth trophic level is approximately ten times larger than energy at the third trophic level.
Energy at the fourth trophic level is approximately two times smaller than energy at the third trophic level.

Answer 3

http://en.wikipedia.org/wiki/Trophic_cascade

Answer 4

1. The answer is (B): Grass, Grasshopper, Snake, Hawk. This is the only option where each preceding organism is directly consumed by each succeeding organism.

2. The answer is (A): Trees increase, mountain lions decrease, foxes increase. This is because deer are a source of prey for mountain lions and a consumer of trees; therefore, reducing their population will result in less food for mountain lions and less consumers of the tree population, leading to reduction in the mountain lion population and stimulation in the tree population. In addition, reduction in the mountain lion population will lead to stimulation of the fox population because foxes are direct prey of mountain lions, and thus reduction of the predators will lead to growth of the prey.

3. The answer is (D): Used in life processes. If you consider it, as organisms become more and more complex, they develop more intricate and complex systems to manage the many needs of life and survival. This mandates high quantities of energy being used in maintaining the continuity of life in complex organisms, which is why higher trophic levels (more complex, predatory organisms) use much more energy in survival than lower trophic levels (more simple organisms).

4. I think the answer is (D): River, though that is a little strange of a question. Energy flows in a cycle within an ecosystem, with direct energy going through producers, consumers, more consumers, even more consumers, eventually to decomposers, and back to producers again. The only sensible analogy used to depict this "flow" would be a river.

5. The answer is (A): Energy at the fourth trophic level is approximately ten times lower than energy at the third trophic level. This follows the 10% Rule: organisms of each succeeding trophic level receives ≈10% of the chemical energy from organisms of their preceding trophic level.

Answer 5

thank u sooo much

Answer 6

6. Panthers and pumas prey on a type of deer in a region. The deer feed on vegetation in the region. What outcome could occur if humans kill the panthers and pumas? (1 point)
The deer population will decrease, allowing the vegetation to become overgrown.
The deer population will increase and will strip the region of the vegetation.
The deer population will be stabilized by the local vegetation.
The deer population will cycle between high and low numbers until a new predator moves into the region.

Answer 7

help me plzz

Answer 8

The answer is (B): The deer population will increase and will strip the region of the vegetation. The panthers and pumas help keep the deer population under control. If the humans begin killing the panthers and pumas, the panther and puma populations will rapidly decrease, which means less predators to the deer. This in turn will cause the deer population to increase suddenly. Since the deer feed on vegetation, a sudden increase of deer means more deer will be feeding on the same resources, which in turn means that the region of vegetation will decrease sharply.

Answer 9

a7. Which processes take in and return carbon to the atmosphere in the carbon cycle? (1 point)
digestion; assimilation
photosynthesis; respiration
absorption; transpiration
combustion; evaporation

Answer 10

8. Describe the information displayed by ecological pyramids. Use all three pyramids (number, biomass, and energy in your answer). (3 points)

Answer 11

9. Describe how a food chain differs from a food web and explain what the arrows on the food chain show. (3 points)

Answer 12

:P I feel like I'm doing your Bio homework...

The answer is (B): Photosynthesis; Respiration. Recall that most carbon forms naturally into carbon dioxide gas. The most basic sugar structure is glucose (C6H12O6) which is generated from absorption of CO2 gas from the atmosphere by plants to undergo photosynthesis. Respiration occurs when energy is burnt up, which causes organisms to excrete CO2 gas to the atmosphere as a biproduct (why humans breathe in oxygen gas but breathe out carbon dioxide.).

Answer 13

I'm not sure about (8) or (9), to be honest. Going to have to check the textbook(s) on those ones.

Answer 14

thank u for ur help sooo much ur so smart i wish i was like that lol

Answer 15

@AakashSudhakar you seem like you know biology well and I fan you. Fan me back please.