Population Ecology

Table shows the result of a study on the population of grass X in a field. The area of each quadrat is 1 m².

What is the percentage coverage of grass X in the school's field?

• 3.19%

• 31.9%

• 5.32%

• 53.2%

The following information shows the results of a study carried out to estimate the population size of tilapia fish in a river.

· Number of tilapia fish in the first capture : 40

· Number of tilapia fish in the second capture : 30

· Number of marked tilapia fish recaptured : 5

The estimated population size of tilapia fish is

• 75

• 100

• 150

• 240

A student carried out a study on the population of grass P in the school's field. He used the quadrat sampling technique in the study. The area of each quadrat is 1 m².

Table 1 shows the result of the study.

The percentage coverage of grass P in the school's field is

• 22.7%

• 37.8%

• 2.27%

• 3.78%

Diagram shows the distribution of Typha latifolia and Typha domingensis in wetland habitat. What are the frequency of both species ?

• A

• B

• C

• D

A group of students conducted an investigation to estimate the size of the lice population in their school park.

Table shows the data obtained from the investigation.

Calculate the size population of the woodlice.

• 609

• 906

• 970

• 980