Which one of the following statement about virus is correct?

(a)

Possess their own metabolic system

(b)

They are facultative parasites

(c)

They contain DNA or RNA

(d)

Enzymes are present

______________ is a thermophilic gram negative bacteria.

(a)

Rhizobium

(b)

Salmonella

(c)

Pseudomonas

(d)

Thermus aquaticus

Life on earth exists within a complex structure called_________.

(a)

Atmosphere

(b)

Biosphere

(c)

Stratosphere

(d)

Ozone

Five kingdom system of classification suggested by R.H. Whittaker is not based on

(a)

Presence or absence of a well defined nucleus

(b)

Mode of reproduction

(c)

Mode of nutrition

(d)

Complexity of body organisation

Actinomycetes comes under _________ kindgom.

(a)

fungi

(b)

chromista

(c)

monera

(d)

protista

The oldest recorded alga is __________

(a)

Grypania

(b)

Gnetum

(c)

Pandorine

(d)

Volvox

Select the wrong statement:

(a)

Isogametes are similar in structure, function and behaviour

(b)

Anisogametes differ either in structure, function and behaviour

(c)

In oomycetes , female gamete is smaller and motile, while male gamete is larger and nonmotile.

(d)

Chlamydomonas exhibits both isogamy and anisogamy and focus shows oogamy.

Example for negatively geotropic roots __________

(a)

Ipomoea, Dahlia

(b)

Asparagus, Ruellia

(c)

Vitis, Portulaca

(d)

Avicennia, Rhizophora

A true fruit is the one where ______.

(a)

Only ovary of the flower develops into fruit

(b)

Ovary and calyx of the flower develops into fruit

(c)

Ovary, calyx and thalamus of the flower develops into fruit

(d)

All floral whorls of the flower develops into fruit

The clitellum is a distinct part in the body of earthworm Lampito mauritii, it is found in?

(a)

Segments 13 - 14

(b)

Segments 14 - 17

(c)

Segments 12 - 13

(d)

Segments 14 - 16

What is the role of bacteria in production of Tea?

What is Virusoid?

Mention any two vegetative reproduction in algae.

Describe the modification of Stolon.

Why cockroaches are called vectors?

Briefly discuss on five kingdom classification. Add a note on merits and demerits.

What are Prions? Who discovered it?

Describe the mode of nutrition of Chemoautotrophic bacteria.

Compare Schizocoelom with enterocoelom.

Explain the nervous system of frog.

Write a note on economic importance of bacteria.

What is protostele? Explain its types.

Why elephants and other wild animals are entering into human living area?