Olete.in – MCQs, Mock Tests & Government Job Prep | ICSE XII MCQ Questions for Class 12 Biology Set 1

Pollination by Bat is called :

1. Omithorphily
2. Entemophily
3. Cheropterophily
4. Hydrophily

✅ Correct Answer: 3

Anemophily takes place by:

1. By Bird
2. By Bat
3. By Snail
4. By Wind

✅ Correct Answer: 4

Entemophily take place by

1. By Bird
2. By Bat
3. By Wind
4. By Insect

✅ Correct Answer: 4

In higher plants, meiosis occurs?

1. During formation of gametes
2. During fertilization
3. During embryogenesis
4. In seeds

✅ Correct Answer: 1

Earthworm is:

1. Unisexual
2. Bisexual
3. Asexual
4. Neutral

✅ Correct Answer: 2

An example of rhizome is

1. Garlic
2. Colocassia
3. Ginger
4. Onion

✅ Correct Answer: 3

Budding is the example of :

1. Vegetative reproduction
2. Tissue culture
3. Sexual production
4. Dispersal

✅ Correct Answer: 1

What is hexapioid (on), in which total number, of chromosomes are 42. then number of chromosomes in its any gamete:

1. 14
2. 28
3. 42
4. 7

✅ Correct Answer: 4

Asexual reproduction in Penicillium fungus usually takes place through?

1. Budding
2. Fission
3. Conidia
4. Gemmules

✅ Correct Answer: 3

When the gametes of two different strains fuse each other, then this process of reproduction is :

1. Sexual reproduction
2. Asexual, reproduction
3. Vegetative reproduction
4. None of these

✅ Correct Answer: 1

Vegetative reproduction takes place in Bacteria :

1. By binary fission
2. By hybridization
3. By fiission
4. By fission

✅ Correct Answer: 1

In potato, which structure takes part in vegetative reproduction?

1. Adventitious root
2. Apex bud of stem
3. Germinating eye bud
4. Arial shoot

✅ Correct Answer: 3

Which structure takes part in gametogenesis :

1. Male gamete
2. Female gamete
3. Both (a) and (b)
4. Male or female gamete

✅ Correct Answer: 3

Which of the following is viviparous?

1. Cockroach
2. Scorpion
3. Bee
4. Butterfly

✅ Correct Answer: 2

In higher plants, fertilization is :

1. External
2. Internal
3. In water
4. In air

✅ Correct Answer: 2

The reproduction takes place by gemma :

1. In higher plants
2. In lower animals
3. In some bryophytes
4. In mammals

✅ Correct Answer: 3

The example of bulb is:

1. Ginger
2. Doob grass
3. Onion
4. Potato

✅ Correct Answer: 3

The organism similar to parent can be obtained by:

1. Speed
2. Zygote
3. Gametes
4. Binary fission

✅ Correct Answer: 4

The term scion is used in relation to :

1. Embryology
2. Sexual reproduction
3. Pollen
4. Grafting

✅ Correct Answer: 4

Vegelative reproduction takes place in Bryophyllum :

1. By buds
2. By leaves
3. By seeds
4. By roots

✅ Correct Answer: 2

Vegetative reproduction takes place in Agave:

1. By bulbils
2. By hybrid
3. By stolon
4. By rhizome

✅ Correct Answer: 1

Pollination in Lotus is:

1. By water
2. By wind
3. By insect
4. All of these

✅ Correct Answer: 1

Haploid plants develop by pollen are called ……..

1. Emasculation
2. Parthenocarpy
3. androgenesis
4. somatic hybridization

✅ Correct Answer: 4

Closed flower:

1. Decliny
2. Cteistogamy
3. Dichogamy
4. None of these

✅ Correct Answer: 2

Demerit of self pollinatlon is:

1. Unisexua
2. Dichoganty
3. Hetorostyle
4. None of these

✅ Correct Answer: 2

Which structure is not found in Angiosperm?

1. Archegonium
2. Carpel
3. Anther
4. Magagametophyte

✅ Correct Answer: 1

Normal Embryosac of Angiosperm is :

1. Unicellular
2. Bicelled
3. Penta celled
4. Seven called

✅ Correct Answer: 1

Commonly in a mature fertilized ovule n, 2n, 3n conditions are respectively found in :

1. Endosperm, nucellus and egg
2. Egg. antipodals and endosperm
3. Integuments, synergids and egg
4. Egg, nucellus and endosperm

✅ Correct Answer: 4

After fertilization ovule develops into:

1. Integument
2. Seed
3. Embryo
4. Endosperm

✅ Correct Answer: 2

Parthenogenesis is common in :

1. Grape
2. Mango
3. Citrus
4. Litchi

✅ Correct Answer: 1

An orthrotropous ovule is one in which micropyle and chalaza are :

1. Oblique to funiculus
2. At right angles to funiculus
3. In straight line with funiculus
4. Parallel to funiculus

✅ Correct Answer: 3

In an ovule meiotic takes place in:

1. Nucellus
2. Megaspore mother cell
3. Megaspore
4. Archesporium

✅ Correct Answer: 2

In Capsella the endosperm in generally:

1. Haploid
2. Diploid
3. Triploid
4. Tetraploid

✅ Correct Answer: 3

All of the following structures are found in angiosperms except ?

1. Archegonium
2. Pistil
3. Anther
4. Megagametophyte

✅ Correct Answer: 1

Totipotency is

1. Development of a fruit from a flower in a medium
2. Development of an organ from a cell in a medium
3. Development of tissues of all kinds from a cell in a medium
4. Development of tissues of all kinds from a cell in a medium

✅ Correct Answer: 3

Who proved that the cells are totipotent?

1. White
2. Skoog
3. Miller
4. Steward

✅ Correct Answer: 4

A typical angiospermic embryo sac is usually:

1. One-celled
2. Two-celled
3. Five-celled
4. seven-celled

✅ Correct Answer: 4

Fatheroflndian Angiosperm Embnology is:

1. B. M. John
2. B. G L. Swami
3. R.N. Kapil
4. P. Maheshwari

✅ Correct Answer: 4

If cotyledons are brought above the soil the germination is:

1. Hypogeal
2. Epigeal
3. Vivipaiy
4. None of these

✅ Correct Answer: 2

Polymbryony occurs in:

1. Maize
2. Citrus
3. Corchorus
4. Carthamus

✅ Correct Answer: 2

In Monocots, grafting is almost impossible because they lack :

1. Cambium
2. Ground tissue
3. Vascular bundle
4. Parenchymatous cells

✅ Correct Answer: 1

Double fertilization in angiosperms was discovered by:

1. Strassburger
2. J. C. Bose
3. Maheshwari
4. Nawaschin

✅ Correct Answer: 4

How many meiotic divisions are necessary to produce 100 pollen grains ?

1. 100
2. 50
3. 25
4. 20

✅ Correct Answer: 3

Double fertilization means:

1. Fusion of two eggs
2. Fusion of egg and pollen nuder of two pollen grains
3. Fusion of two polar nuclei with one male gamete
4. Fusion between synergid cells and male gamete

✅ Correct Answer: 3

Pollination by bats is called:

1. omithophily
2. Entromophily
3. Cheiropterophily
4. Hydrophily

✅ Correct Answer: 1

Pollination by snails is called:

1. Malecophily
2. Zoophily
3. Anemophily
4. Hydrophily

✅ Correct Answer: 1

Development of fruit without fertilizations is:

1. Parthenogenesis
2. Heterostyly
3. Parthenocarpy
4. Agamospermy

✅ Correct Answer: 3

Who discovered fertilization?

1. Nawaschin
2. Strassburger
3. Leeuwen Hock
4. Robert Hook

✅ Correct Answer: 2

When more than one embryoper embryosac is found. It is called:

1. Embryogeny
2. Amphimisis
3. Agamospormy
4. Polyembryoni

✅ Correct Answer: 4

When pollen tube enter into the nucellus through micropyle is called:

1. Porogamy
2. Xenogamy
3. Mesogamy
4. Dikogamy

✅ Correct Answer: 1