Practice MCQ Questions and answers on Biology-GK

Spongilla is a genus of fresh water sponges, found in lakes and slow streams. Sponges of the genus Spongilla attach themselves to rocks and logs and filter the water for various small aquatic organisms. It has monaxons spicules, which are like single pointed shaft. These spicules are present in large numbers.

All single-celled eukaryotes are placed under Protista. This kingdom forms a link with others dealing with plants, animals and fungi.

The kangaroo is a marsupial from the family Macropodidae. In common use the term is used to describe the largest species from this family, the red kangaroo, as well as the antilopine kangaroo, eastern grey kangaroo, and western grey kangaroo.

Asterias has bilateral symmetry only at larval stagebut fivefold symmetry (pentamerism, a special type of radial symmetry) as adults.
Nereis do not possess any symmetry elements in their body organisation.

Taxonomy is that branch of biology dealing with the identification and naming of organisms.

Octopus belongs to the phylum Mollusca.

Octopus is a mollusc.

In coelentrates mesoderm gives rise to circulatory system.

The best known aspect of morphology, usually called anatomy, is the study of gross structure, or form, of organs and organisms.

Eukaryotes cells have a very well defined nucleus, in which nuclear material (chromosomes or DNA) is enclosed in double nuclear membrane.