What is the relationship between mosquitoes and humans? Mutualism Predation Comp

Question

What is the relationship between mosquitoes and humans?

Mutualism

Predation

Competition

Question 2

Select one answer.

10 points

What is the per capita death rate for 2010?

0.001

0.09

88

11

Question 3

Select one answer.

10 points

When a population is at its carrying capacity...

The death rate goes to zero so the population can reach its highest level.

The birth rate is at its maximum so the population stays at a high level.

The birth rate equals the death rate so the population size stays constant.

The birth rate goes to zero and the population stays constant.

Question 4

Select one answer.

10 points

Some coastal areas are more vulnerable to storms and beach erosion because mangrove forests or grass salt marshes have been cleared and removed by humans. This is most clearly an example of...

physical disturbance.

resource depletion.

pollution.

none of the above; it is not an example of environmental impact.

Question 5

Select one answer.

10 points

Which complicated cycle includes several different processes that are carried out by bacteria in the soil and water?

Phosphorus cycle

Nitrogen cycle

Carbon cycle

Water cycle

Question 6

Select one answer.

10 points

The greenhouse effect is the recent and ongoing shift toward warmer temperatures and other climate disruptions caused by human alteration of Earth

Yellowstone Wolf Project Annual Report 2010 Variable Value in 2010 N (population size) 97 annual number of births 38 annual number of deaths 9 total land area 8,987 km 2

Explanation / Answer

Answer 1: Predation
Actually it should be parasitism, but this option is not mentioned here in the question so that best possible answer will be predation.
Its not competition because humans & mosquitoes can't compete for anything as these are entirely different species.
It is not mutualism as humans are not benefited from mosquitoes in any sense.

Answer 2: 0.09

Death rate = number of deaths/ total population = 9 / 97 = 0
.09

Answer 3: Option 2
Carrying capacity means when the conditions are most favorable, so that organism can increase its population to maximum extent.

Answer 4: Option 4
Since humans are cutting the trees and forests to either get wood and other products, or for urbanization, its not an environmental impact.

Answer 5: Option 2
Nitrogen cycle would be the most complicated as bacteria is involved in converting atmospheric nitrogen to a form which can be absorbed by plants and this way N enters the food chain. After the death of the organisms also, nitrogen compounds are degraded into elemental form or simple form by bacteria in the soil itself. Same process happens in water as well.

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