Subject: MDCAT

Legumes, such as clover and alfalfa, have nodules on their roots that contain nitrogen-fixing bacteria. These bacteria convert nitrogen gas from the atmosphere into nitrates. Which of the following best accounts for the presence of nitrogen-fixing bacteria in legume root nodules?

In which of the following phases of growth, do bacteria prepare themselves for division?

An ideal surface for respiration should

When the blood leaves the capillary bed most of the carbon dioxide is in the form of

The phenomenon through which root cells of a plant take in nitrate ions from the surrounding soil is

All the members of kingdom Protista are

Which of the following vertebrates has haemoglobin dissolved in the plasma?

The resemblance of euglenoids with plants and animals is significant in terms of

In which animal does the heart NOT receive oxygenated blood?

A cell wall consisting of two shells which overlap and fit together like a Petri dish is a characteristic of