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

  • 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 an genetic makeup

Non-flagellate spores are called conidia. In which organism they are seen?

  • . Penicillium

  • .  Hydra

  • C. Chlamydomonas

  • . Amoeba

Development of zygote taking place outside the body is called?

  • A. Viviparous

  • B. Oviparous

  • C. Omnivorous

  • D. Surrogacy

Plants like Elm (Ulmus), Dandelion (Taraxacum) and members of Rose Family vegetatively reproduce by

  • Rhizome

  • Sucker

  • Stolon

  • Corm

The vegetative propagule of Bryophyllum is:

  • Bulbil

  • Leaf buds

  • Rhizome

  • Offset

Water hyacinth is one of the most invasive weeds primarily because:

  • It gets adapted to any fresh water body easily

  • It produces secondary metabolites against herbivores

  • It can propagate vegetatively at a phenomenal rate

  • It is predated upon by a large number of organisms

Isogametes are seen in:

  • Cladophora

  • Fucus

  • Human beings

  • Ficus

The number of chromosomes in a meiocyte of the fruit fly is:

  • 4

  • 8

  • 12

  • 16

The most critical event in sexual reproduction is:

  • Gametogenesis

  • Gamete transfer

  • Fertilization

  • Embryogenesis

With respect to organisms exhibiting internal fertilization, organisms exhibiting external fertilization show:

  • More variations

  • Great synchrony between sexes

  • Large female size than males

  • Less vulnerability to predation

Ginger is vegetatively propagated through:

 

  • Rhizome

  • Bulbil

  • Stolon

  • Offset

In animals exhibiting internal fertilization:

  • There is high synchrony between the two sexes

  • The chances of desiccation of the embryo is high

  • The male gamete is motile

  • Vulnerability to predators is increased

Rotifers:

  • Exhibit adult reproductive structures in juvenile phase

  • Are plants that can be both monoecious or dioecious

  • Produce gametes by mitosis

  • Are animals capable of reproducing by parthenogenesis

With respect to external fertilization, which of the following is not an advantage of internal fertilization?

  • A decreased risk of disease transmission

  • Minimal waste of gametes

  • Greater chances of individual egg fertilization

  • Relatively longer time of egg protection

Match Column I with column II and select the correct option using the codes given below:

 

Column I

 

Column II

A.

Pistils fused together

1.

Gametogenesis

B.

Formation of gametes

2.

Pistillate

C. 

Hyphae of higher ascomycetes  

3.  

Syncarpous

D.

Unisexual female flower

4.

Dikaryotic

Codes:

 

A    

B     

C     

D

(1)

4

3

2

1

(2)

2

1

4

3

(3)

1

2

4

3

(4)  

3

1

4

2
  • 1
  • 2
  • 3
  • 4

Which one of the following generates new genetic combinations leading to variation?

  • Vegetative reproduction

  • Parthenogenesis

  • Sexual reproduction

  • Nucellar polyembryony

Which one of the following is wrong about Chara?

  • Upper oogonium, and lower round anthredium

  • Globule and nucule present on the same plant

  • Upper anthredium and lower oogonium

  • Globule is male reproductive structure

The 'Eyes' of the potato tuber are 

  • flower buds

  • shoot buds

  • axillary buds

  • root buds

Product of sexual reproduction generally generates

  • longer viability of seeds

  • prolonged dormancy

  • new genetic combination leading to variation

  • large biomass

Monoecious plant of Chara shows occurrence of

  • antheridiophore and archegoniophore on the same plant

  • stamen and carpel on the same plant

  • upper antheirdium and lower oogonium on the same plant

  • upper oogonium and lower antheridium on the same plant

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

  • 63

  • 84

  • 21

  • 42

Which one of the following plants is monoecious?

  • Marchantia

  • Pinus

  • Cycas

  • Papaya

Flowers are unisexual in

  • pea

  • cucumber

  • china rose

  • onion

A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of 

  • stock

  • scion

  • both stock and scion

  • neither stock nor scion.

Which form of reproduction is correctly matched?

  • Euglena → transverse binary fission

  • Paramecium → longitudinal binary fission

  • Amoeba → multiple fission

  • Plasmodium → binary fission

Which one of the following methods is commonly used to maintain the genetic traits of a given plant?

  • By propagating through seed germination

  • By propagating through vegetative multiplication

  • By generating hybrids through intergeneric pollination

  • By treating the seeds with gamma radiations

Which animal has the longest gestation period?

  • Shark

  • Walrus

  • Elephant

  • Dog

The ploidy of bread wheat is 

  • 4 n

  • 6 n

  • 2 n

  • 8 n

Life span of parrot is 

  • 140 years

  • 60 years

  • 80 years

  • 40 years

No individual is immortal except:

  • Single celled organisms

  • Green plants

  • Sponges

  • Drones

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Practice Botany Quiz Questions and Answers