In which mode of reproduction variations are seen _____.

(a)

Asexual

(b)

Parthenogenesis

(c)

Sexual

(d)

Both a and b

External fertilization is seen is ______

(a)

Mammals and birds

(b)

Reptiles and sponges

(c)

Fishes and birds

(d)

Sponges and amphibians

Paedogenetic parthenogenesis is seen in ______

(a)

planula larvae of enidarians

(b)

Cydippid larvae of pleurobranchia

(c)

Redia larvae of liver fluke

(d)

Trochophore larvae of Annelids

Colostrum is rich in ______.

(a)

Ig E

(b)

Ig A

(c)

Ig D

(d)

Ig M

This technique is used to diagnose the chromosomal abnormities.

(a)

Assisted Reproductive Technology (ART)

(b)

Micro Testicular Sperm Extraction

(c)

Amniocentesis

(d)

GIFT

Which blood group doesn't possess antibodies?

(a)

I^AI^B

(b)

I^OI^O

(c)

I^AO

(d)

I^BI^B

Sudden appearance of vestigial organs in highly evolved organisms is called

(a)

Vestigial organs

(b)

Connecting link

(c)

Atavistic organs

(d)

Adaptive radiation

During sewage treatment, biogas are produced which includes

(a)

Methane, hydrogen sulphide, carbon dioxide

(b)

Methane, oxygen, hydrogen sulphide

(c)

Hydrogen sulphide, methane, sulphur dioxide

(d)

Hydrogen sulphide, nitrogen, methane

The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of

(a)

Non-recombinant bacteria containing β galactosidase.

(b)

Insertional inactivation of α-galactosidase in non-recombinant bacteria.

(c)

Insertional inactivation of α-galactosidase in recombinant bacteria.

(d)

Inactivation of glycosidase enzyme in recombinant bacteria

The relationship between sucker fish and shark is__________

(a)

Competition

(b)

Commensalism

(c)

Predation

(d)

Parasitism.

An association of individuals of different species living in the same habitat and having functional interaction is:

(a)

Biotic community

(b)

Ecosystem

(c)

Population

(d)

Ecological niche

Identify the incorrect statement

(a)

Water is a universal solvent

(b)

Water has less surface tension

(c)

Water is heavier than air

(d)

When freezes water contracts

Which of the following forests is known as the lungs of the planet earth?

(a)

Tundra forest

(b)

Rain for forest of north east India

(c)

Taiga forest

(d)

Amazon rain forest

Mundanthurai wild life sanctuary is located in ___________ district.

(a)

Coimbatore

(b)

Tirunelveli

(c)

Kancheepuram

(d)

Nagapattinam

Which is not an accepted biodiversity hotspots of India?

(a)

Indian Himalayas

(b)

Western Ghats

(c)

Indo-Burma

(d)

Deccan Plateau

The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:

(a)

Hydrogen

(b)

Carbon

(c)

Chlorine

(d)

Fluorine

Test cross involves ____.

(a)

Crossing between two genotypes with recessive trait

(b)

Crossing between two F₁ hybrids

(c)

Crossing the F₁ hybrid with a double recessive genotype

(d)

Crossing between two genotypes with dominant trait

In his classic experiments on Pea plants, Mendel did not use ______.

(a)

Flowering position

(b)

Seed colour

(c)

Pod length

(d)

Seed shape

Pure tall plants are crossed with pure dwarf plants. In the F₁ generation, all plants were tall. These tall plants of F₁ generation were selfed and the ratio of tall to dwarf plants obtained was 3:1. This is called ______.

(a)

Dominance

(b)

Inheritance

(c)

Codominance

(d)

Heredity

If haploid number in a cell is 18. The double monosomic and trisomic number will be _____.

(a)

35 and 37

(b)

34 and 37

(c)

37 and 35

(d)

17 and 19

Find the wrongly matched pair.

(a)

Endemism - Species confined to a region and not found anywhere else.

(b)

Hotspots - Western ghats

(c)

Ex-situ Conservation - Zoological parks

(d)

Sacred groves - Saintri hills of Rajasthan

(e)

Alien sp. Of India - Water hyacinth

People’s movement for the protection of environment in Sirsi of Karnataka is ______.

(a)

Chipko movement

(b)

Amirtha Devi Bishwas movement

(c)

Appiko movement

(d)

None of the above

The quickest method of plant breeding is _______.

(a)

Introduction

(b)

Selection

(c)

Hybridization

(d)

Mutation breeding

Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems and ability to grow in the sugarcane belt of North India?

(a)

Saccharum robustum and Saccharum officinarum

(b)

Saccharum barberi and Saccharum officinarum

(c)

Saccharum sinense and Saccharum officinarum

(d)

Saccharum barberi and Saccharum robustum

Statement A: Coffee contains caffeine
Statement B: Drinking coffee enhances cancer

(a)

A is correct, B is wrong

(b)

A and B – Both are correct

(c)

A is wrong, B is correct

(d)

A and B – Both are wrong