Biology Past Questions and Answers

Stomata of some plants are sunken and protected by hairs. These are features of

An ecological factor that will have the most limiting effects on the abundance of phytoplankton in a turbid pond is

In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is

A boy who is fond of swimming in a pond finds himself passing urine with traces of blood. He is likely to have contacted

The easiest way to establish the level of pollution in a local stream is to measure the level of