___________ are considered as pollution indicators.

(a)

Mycorrhiza

(b)

Actinomycete

(c)

Lichens

(d)

Cyanobacteria

Mad cow disease is caused by ______________

(a)

Prions

(b)

Virion

(c)

Viroid

(d)

Phage

An example of photoautotrophic bacteria is ___________

(a)

Nitrosomonas

(b)

Nitrobacter

(c)

Chlorobium

(d)

Spirillum

_______ is an intact infective virus particle which is non - replicating outside a host cell.

(a)

Virus

(b)

Viroid

(c)

Virion

(d)

Virusoids

Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as wen as animals and can survive without oxygen?

(a)

Bacillus

(b)

Pseudomonas

(c)

Mycoplasma

(d)

Nostoc

Which of the following have an open circulatory system?

(a)

Frog

(b)

Earthworm

(c)

Pigeon

(d)

Cockroach

During inspiration, the diaphragm _____.

(a)

expands

(b)

unchanged

(c)

relaxes to become domed-shaped

(d)

contracts and flattens

At the venous end of the capillary bed, the osmotic pressure is _____.

(a)

Greater than the hydrostatic pressure

(b)

Result in net outflow of fluids

(c)

Results in net absorption of fluids

(d)

No change occurs

Appendicular skeleton is ______.

(a)

girdles and their limbs

(b)

vertebrae

(c)

skull and vertebral column

(d)

ribs and sternum

Which one of the following is not an endemic species of earthworm?

(a)

Perionyx

(b)

Lampito

(c)

Eudrillus

(d)

Octochaetona