Biology Past Questions and Answers

Which of the following structures produces the greatest variety of digestive enzymes?

The following are abiotic components of an ecosystem except

Use the information on capture-recapture method to calculate the total number of organisms in a habitat.
First capture = 200
Second capture = 120
Number of organisms with mark in second capture = 40
The total number of organisms therefore is

Ecological investigation in a habitat includes the following procedures except

Which of the following substances when lost from the body of a mammal will not be returned to the ecosystem?