Caffeine is a stimulant present in

1

(a)

Coffee

(b)

Tea

(c)

Cold drinks

(d)

All of the these

In fermentation of dough which is the main gas produced?

1

(a)

Carbon dioxide

(b)

Hydrogen

(c)

Both (a) and (b)

(d)

Methane

Choose the correct answer regarding the ZIFT procedure?

1

(a)

Ova collected from a female donor are transferred to the fallopian tube to facilitate zygote formation.

(b)

Zygote is collected from a female donor and transferred to the fallopian tube.

(c)

Zygote is collected from a female donor and transferred to the uterus

(d)

Ova collected from a female donor and transferred to the uterus

Methanogens do not produce

1

(a)

oxygen

(b)

methane

(c)

hydrogen sulfide

(d)

carbon dioxide

Activated sludge should have the ability to settle quickly so that it can

1

(a)

be rapidly pumped back from sedimentation to aeration tank

(b)

absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank

(c)

be discarded and anaerobically digested

(d)

absorb colloidal organic matter

Micro-propagation is :

1

(a)

propagation of microbes in vitro

(b)

propagation of plants in vitro

(c)

propagation of cells in vitro

(d)

growing plants on smaller scale

In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are :

1

(a)

males and females, respectively

(b)

females and males, respectively

(c)

all males

(d)

all females

Which one of the following is a marine fish :

1

(a)

Rohu

(b)

Hilsa

(c)

Catla

(d)

Common carp

Mother and father of a person with 'O' blood group have "A" and 'B' blood group respectively. What would be the genotype of both mother and father?

1

(a)

Mother is homozygous for "A" blood group and father is heterozygous for 'B'

(b)

Mother is heterozygous for 'A' blood group and father is homozygous for 'B'

(c)

Both mother and father are heterozygous for 'A' and 'B' blood group, respectively

(d)

Both mother and father are homozygous for "A" and 'B' blood group, respectively

Embryo sac is to ovule __________  is to an anther

1

(a)

Stamen

(b)

Filament

(c)

Pollen grain

(d)

Androecium

In the embryos of a typical dicot and grass, true homologous structures are

1

(a)

Coleorhiza and Coleoptile

(b)

Coleoptile and Scutellum

(c)

Cotyledons and Scutellum

(d)

hypocotyl and radical

The phenomenon wherein the ovary develops into a fruit without fertilization is called:

1

(a)

Parthenocarpy

(b)

Apomixis

(c)

Asexual reproduction

(d)

Sexual reproduction

Biolistics (gene-gun) is suitable for

1

(a)

disarming pathogen vectors

(b)

transformations of plant cells

(c)

constructing recombinant DNA by joining with vectors

(d)

DNA fingerprinting

Nucellar polyembryony is reported in species of

1

(a)

Citrus

(b)

Gossypium

(c)

Triticum

(d)

Brassica

Which of the following statements support the view that elaborate sexual reproductive process appeared much later in the organic evolution.
(i)   Lower groups of organisms have simpler body design.
(ii)  Asexual reproduction is common in lower groups.
(iii) Asexual reproduction is common in higher groups of organisms
(iv) The high incidence of sexual reproduction in angiosperms and vertebrates

1

(a)

(i) and (ii)

(b)

(i) and (iii)

(c)

(ii) and (iv)

(d)

(ii) and (iii)

Offsprings formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:

1

(a)

Sexual reproduction is a lengthy process

(b)

Gametes of parents have qualitatively different genetic composition

(c)

Genetic material comes from parents of two different species

(d)

Greater amount of DNA is involved in sexual reproduction.

There are various types of reproduction. The type of reproduction adopted by an organism depends on:

1

(a)

The habitat and morphology of the organism 

(b)

Morphology of the organism

(c)

Morphology and physiology of the organism

(d)

The organism's habitat, physiology and genetic makeup

Identify the correct statement.

1

(a)

In sexual reproduction, the offspring produced are morphologically and genetically identical to the parent

(b)

Zoospores are sexual reproduction structures

(c)

In sexual reproduction, a single parent produces offspring with or without the formation of gametes

(d)

Conidia are asexual structures in Penicillium.

One of the following is not the causal organism for ringworm

1

(a)

Microsporum

(b)

Trichophyton

(c)

Epidermophyton

(d)

Macrosporum

In 2005, for each of the 14 million people present in a country,0.028 were born and 0.008 died during the year. Using exponential equation, the number of people present in 2015 is predicted as:

1

(a)

25 millions

(b)

17 millions

(c)

20 millions

(d)

18 millions

Amensalism is an association between two species where:

1

(a)

one species is harmed and other is benefitted

(b)

one species is harmed and other is unaffected

(c)

one species is benefitted and other is unaffected

(d)

both the species are harmed

Which one of the following statements pertaining to pollutants is correct?

1

(a)

DDT is a non-biodegradable pollutant

(b)

excess fluoride in drinking water causes osteoporosis.

(c)

excess cadmium in drinking water causes black foot disease.

(d)

methyl mercury in water may cause 'Itai Itai' disease.

Which one of the following pairs is mismatched?

1

(a)

Tundra : permafrost

(b)

Savannah : acacia trees

(c)

Prairie: epiphytes

(d)

Coniferous forest : evergreen trees

Pyramid of energy in aquatic ecosystem is 

1

(a)

always straight

(b)

always inverted

(c)

bell shaped

(d)

none of these

1st polar body is formed at which state of oogenesis?

1

(a)

1st meiosis

(b)

2nd mitosis

(c)

1st mitosis

(d)

differentiation