R4RIN – MCQs, Mock Tests | Biology Biology MCQS[NEET-2021 to 2022]-Reproduction in plants

What is the theme of this year,s World Kidney Day?

1. Kidney and Health
2. Healthy Lifestyle for Healthy Kidneys
3. Kidney Health for Everyone, Everywhere
4. Kidney Disease and Obesity

✅ Correct Answer: 3

Who has been selected for prestigious Kusumagraj national award for literature?

1. SS Jain Nath
2. VV Shirwadkar
3. Ved Rahi
4. VV Nath

✅ Correct Answer: 3

Who was conferred with the Param Vishisht Seva Medal, by President Ramnath Kovind for distinguished services?

1. Bipin Rawat
2. GD Bakshi
3. Devendra Sikri
4. Prabhat Singh

✅ Correct Answer: 1

Which team won the Bombay Gold Cup Hockey Team crown 2019?

1. Indian Oil
2. ONGC
3. Punjab And Sind Bank
4. Bank of Baroda

✅ Correct Answer: 1

Special Olympics World Games 2019 begins at which city?

1. Bishkek
2. Paris
3. Abu Dhabi
4. New York

✅ Correct Answer: 2

Which company to launch digital innovation center ar Bucharest in Romania to develop software for clients based on cloud, big data, artificial intelligence, and machine learning?

1. Wipro
2. HCL
3. Infosys
4. TCS

✅ Correct Answer: 3

Which bank has launched doorstep banking service for senior citizens over 70 years of age and differently-abled customers recently?

1. BOB
2. IDBI
3. SBI
4. PNB

✅ Correct Answer: 2

The arrangement of the nuclei in a normal embryo sac in the dicot plants is

1. 2 + 3 + 3
2. 3 + 2 + 3
3. 2 + 4 + 2
4. 3 + 3 + 2

✅ Correct Answer: 2

Apomictic embryos in citrus arise from

1. Maternal sporophytic tissue in ovule
2. Synergids
3. Diploid egg
4. Antipodal cells

✅ Correct Answer: 1

Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:

1. Middle layers
2. Endothecium
3. Epidermis
4. Tapetum

✅ Correct Answer: 2

In a type of apomixis known as adventive embryony, embryos develop directly from the

1. Zygote
2. Nucellus or integuments
3. Synergids or antipodals in an embryo sac
4. Accessory embryo sacs in the ovule

✅ Correct Answer: 2

In nature, cleistogamous flowers are

1. wind pollinated
2. insect pollinated
3. self pollinated
4. bird pollinated

✅ Correct Answer: 3

Which one of the following is surrounded by a callose wall?

1. Male gamete
2. Microspore mother cell
3. Pollen grain
4. Egg

✅ Correct Answer: 2

What is the function of germ pore?

1. Initiation of pollen tube
2. Absorption of water for seed germination
3. Emergence of radicle
4. Release of male gametes

✅ Correct Answer: 1

Which of the following pairs in angiosperms are diploid and triploid, respectively?

1. Polar nucleus and secondary nucleus
2. Microspore mother cell and egg cell
3. Secondary nucleus and endosperm
4. Endosperm and antipodal cells

✅ Correct Answer: 3

Which of the following statements about sporopollenin is false?

1. Exine has apertures called germ pores where sporopollenin is present
2. Sporopollenin is one of the resistant organic materials
3. Exine is made up of sporopollenin
4. Sporopollenin can withstand high temperatures and strong acids

✅ Correct Answer: 1

Which one of the following pairs of plant structures has haploid number of chromosomes?

1. Egg cell and antipodal cells
2. Megaspore mother cell and antipodal cells
3. Egg nucleus and secondary nucleus
4. Nucellus and antipodal cells

✅ Correct Answer: 1

Which one of the following statements is wrong?

1. Intine is made up of cellulose and pectin
2. Vegetative cell is larger than generative cell
3. Pollen grains in some plants remain viable for months
4. When pollen is shed at two-celled stage, double fertilization does not take

✅ Correct Answer: 4

In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?

1. 6:01:00
2. 6:00:01
3. 3:01:03
4. 3:02:03

✅ Correct Answer: 1

Vernalisation stimulates flowering in

1. Carrot
2. Turmeric
3. Elephant yam
4. Ginger

✅ Correct Answer: 1

What is the ratio of equational divisions that take place in Cycas and angiosperms respectively leading to the formation of male gametes from pollen grains?

1. 2:01
2. 3:01
3. 3:02
4. 2:03

✅ Correct Answer: 1

Ornithophily refers to the pollination by which of the following:

1. Snails
2. Birds
3. Insects
4. Air

✅ Correct Answer: 2

Ovule is attached to the placenta of ovary wall by:

1. Funicle
2. Raphae
3. Hilum
4. Testa

✅ Correct Answer: 1

Plants with ovaries having only one or a few ovules, are generally pollinated by

1. Birds
2. Butterflies
3. Bees
4. Wind

✅ Correct Answer: 4

Sporopollenin is chemically

1. Protein
2. Fatty substance
3. Homopolysaccharide
4. Heteropolysaccharide

✅ Correct Answer: 2

The pollen are liberated in Cassytha by:

1. Transverse dehiscence
2. Longitudinal dehiscence
3. Porous dehiscence
4. Valvular dehiscence

✅ Correct Answer: 4

There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from tha

1. 48,000
2. 24,000
3. 10,000
4. 4,000

✅ Correct Answer: 1

Grafting is successful in dicots but not in monocots because the dicots have:

1. cork cambium
2. vessels with elements arranged end to end
3. vascular bundles arranged in a ring
4. cambium for secondary growth

✅ Correct Answer: 4

In which one pair both the plants can be vegetatively propagated by leaf pieces

1. Asparagus and Bryophyllum
2. Agave and Kalanchoe
3. Bryophyllum and Kalanchoe
4. Chrysanthemum and Agave

✅ Correct Answer: 3

An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

1. Lignin
2. Cellulose
3. Cuticle
4. Sporopollenin

✅ Correct Answer: 4

The coconut water and the edible part of coconut are equivalent to

1. Mesocarp
2. Embryo
3. Endosperm
4. Endocarp

✅ Correct Answer: 3

The gynoecium consists of many free pistils in flowers of

1. Papaver
2. Michelia
3. Aloe
4. Tomato

✅ Correct Answer: 2

Both, autogamy and geitonogamy are prevented in

1. Castor
2. Maize
3. Cucumber
4. Papaya

✅ Correct Answer: 4

Even in absence of pollinating agents seed-setting is assured in

1. Salvia
2. Fig
3. Zostera
4. Commelina

✅ Correct Answer: 4

Wind pollinated flowers are

1. Small, producing large number of dry pollen grains
2. Small, brightly coloured, producing large number of pollen grains
3. Small, producing nectar and dry pollen
4. Large, producing abundant nectar and pollen

✅ Correct Answer: 1

In anatropous ovule what is the direction of micropyle?

1. Right
2. Downward
3. Upward
4. Left

✅ Correct Answer: 2

Which type of association is found in between entomophilous flower and pollinating agent?

1. Cooperation
2. Commensalism
3. Mutualism
4. Coevolution

✅ Correct Answer: 3

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called

1. Geitonogamy
2. Xenogamy
3. Karyogamy
4. Autogamy

✅ Correct Answer: 1

In which one of the following, male and female gametophytes do not have free living independent existence

1. Funaria
2. Pteris
3. Cedrus
4. Polytrichum

✅ Correct Answer: 1

When the other floral parts are arranged at the base of the gynoecium, the flower is called :

1. Perigynous flower
2. Epigynous flower
3. Hypogynous flower
4. None of these

✅ Correct Answer: 3

Male gametes in angiosperms are formed by the division of:

1. Generative cell
2. Microspore
3. Microspore mother cell
4. Vegetative cell

✅ Correct Answer: 1

The aleurone layer in maize grain is specially rich in

1. Lipids
2. Starch
3. Auxins
4. Proteins

✅ Correct Answer: 4

Endosperm is formed during the double fertilization by:

1. Ovum and male gamete
2. One polar nuclei and one male gamete
3. Two polar nuclei and one male gamete
4. Two polar nuclei and two male gametes

✅ Correct Answer: 3

In Angiosperms pollen tube liberate their male gametes into the:

1. Egg cell
2. Antipodal cells
3. Central cell
4. Synergids

✅ Correct Answer: 4

Apomixis is a type of reproduction that results is the development of a/an

1. New organism without fusion of gametes
2. New organism from fusion products of gametes
3. Embryo from endosperm
4. Embryo from nucellus

✅ Correct Answer: 1

Wind pollination is common in

1. Legumes
2. Orchids
3. Lilies
4. Grasses

✅ Correct Answer: 4

Double fertilization was first discovered by Nawaschin (1898) in

1. Lilium and Fritillaria
2. Mango and Sugarcane
3. Papaya and Pea
4. Brassica and Candytuft

✅ Correct Answer: 1

Egg apparatus consists of

1. Egg
2. Egg and polar nuclei
3. Egg and synergids
4. Egg and antipodal cells

✅ Correct Answer: 3

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?

1. 21
2. 42
3. 63
4. 87

✅ Correct Answer: 3