Biology MCQs with answers Page - 52

Starfish are also known as sea stars and are not really fish despite the name been given to them. These are echinoderms, which are found abundant in the deep blue seas and shallow waters as well. The characteristic feature of the starfish is the 5 (or even more) arms. The surface of these arms is often spiky in appearance. An interesting fact about the starfish is that it has two stomachs. The cardiac stomach can help the starfish to engulf food outside its body. When the cardiac stomach comes back into the body, the food in it is transferred to the pyloric stomach. Starfish are found in all the oceans around the world. A large variety of the same is seen in the tropical area of the Indo-Pacific. These also live in the coral reefs and seabed that are really at great depths. Starfish are never found in freshwater. In case a starfish loses its arm, it is capable of regenerating the same.

Cleviceps purpurea is an important ascomycete that grows on the grains of rye grass cereals. It produces the drug ergot, which is both a severe poison and a useful medicinal drug. It affects the central nervous system as well as causes the contraction of involuntary muscle. Ergotism, caused by eating infected rye bread, was common in the Middle Ages, when it was known as “St. Anthony’s Fire.

The disease has still not been observed in India. It is a fungal disease that periodically destroys wheat crops in South America. The disease was first observed in Brazil in 1985. The first Asian outbreak of wheat blast was found in Bangladesh in February 2016.

First statement is incorrect because anaerobic digestion is a natural process in which bacteria convert organic materials into biogas.
Second statement is incorrect because biomass conversion can result in fuel in solid, liquid, or gas form.