Which of the following organisms does not exist as a single free living cell?

In man, the ability to roll the tongue is a variation classified as

A green snake in green grass is able to escape notice from predators because of its

Darwin is considered the first scientist who correctly explained the theory of

The most important adaptation of xerophytes is the ability of the protoplasm to

A tall plant crossed with a dwarf one produces offspring of which half are tall and half are dwarf. What are the genotypes of the parents?

The ability of an organism to live successfully in an environment is known as

The stem of a typical aqautic plant usually has many

For heterotrophic organisms, competition is least caused by the inadequacy of