Reproduction in Organisms

Formation of young ones from unfertilized egg is (repeat)

1. Parthenocarpy
2. Parthenogenesis
3. Apomixis
4. Vegetative reproduction

Twins in case of human can be clone when they are-

1. Fraternal twins
2. Identical (monozygotic) twins
3. Both types
4. Neither type

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

1. Parthenogenesis
2. Apomixis
3. Parthenocarpy
4. Apogamy

Which of the following is not an example of parthenogenesis?

1. Honey bees
2. Rotifers
3. Frog
4. Water fleas

Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because

1. They inherit characters from two parents
2. They have more chromosomes
3. Only sexual reproduction causes mutations
4. Sexual reproduction is faster

Formation of young ones from unfertilized egg is

1. Apomixis
2. Parthenocarpy
3. Parthenogenesis
4. Apogamy

Which of the following is false about external fertilisation?

1. It occurs in most aquatic organisms
2. Chances of fertilisation are high
3. Young ones are at high risk from predators
4. Large number of gametes are produced

Which one is an oviparous animal?

1. Bat
2. Whale
3. Penguin
4. Dolphin

Development of embryo from egg without fertilization is called

1. Apomixis
2. Parthenogenesis
3. Parthenocarpy
4. Apogamy

Offsprings usually resemble the parents in sexual reproduction is

1. Always true
2. Usually true but not always
3. Never true
4. Only true for asexual reproduction

In animals, shift from juvenile phase to reproductive phase is marked by–

1. Morphological change
2. Physiological change
3. Behavioural change
4. All of the above

Which is necessary condition for sexual reproduction?

1. Presence of two parents
2. Presence of two different gametes
3. Presence of sex organs
4. Presence of meiosis

Which is an example of bisexual organism?

1. Ascaris
2. Marchantia
3. Sweet potato
4. Periplaneta Americana

Which phase has slow metabolism-

1. Juvenile
2. Reproductive
3. Senescence
4. All of the above

The number of chromosomes in wing cells of Drosophila is 8. Then chromosomes in the meiocyte of the same shall be-

1. 8
2. 16
3. 4
4. 10

If a leaf cell of potato has x chromosomes then what will be the number of chromosomes in a bud of potato?

1. 2x
2. x/2
3. x/4
4. x

Menstrual cycle is found in

1. Apes and humans
2. Dogs, tiger
3. Rats, deers
4. Cows, sheep

Chromosome numbers in meiocyte of Apple is:

1. 38
2. 46
3. 48
4. 34

Chromosome numbers in meiocyte of Dog is:

1. 38
2. 46
3. 78
4. 24

In which of the following flowering plants, both male and female flowers may be present on different individuals?

1. Date palm
2. Pumpkin
3. Papaya
4. Both (1) and (3)

The two main pre-fertilisation events are:

1. Syngamy and zygote formation
2. Gametogenesis and gamete transfer
3. Embryogenesis
4. Both (1) and (2)

Mass flowering in Neelakuranji changes large tracts of hilly areas in

1. Karnataka
2. Kerala
3. Tamil Nadu
4. All of these

Flowering in Bamboo species occurs

1. Only once in their life time
2. Many times in their life time
3. After 5 years
4. Never

Essential and most critical event in sexual reproduction is

1. Fertilization
2. Fusion of male and female gametes
3. Division in male and female gametes
4. Both (1) and (2)

Which of the following is a hermaphrodite?

1. Ant
2. Aphids
3. Earthworm
4. Cockroach

A population of genetically identical individuals, obtained from asexual reproduction is

1. Callus
2. Clone
3. Deme
4. Aggregate

Select the correct statement

1. Reproduction maintains populations of the organisms.
2. Reproduction helps in bringing out variations
3. Reproduction is a biological process in which an organism gives rise to young ones.
4. All of these

Lifespan of a tortoise is

1. 100-150 years
2. 250 years
3. 20 years
4. 1 year

The only method for genetic variation that can arise in an asexually reproducing population is brought about by

1. Budding
2. Parthenocarpy
3. Mutations
4. Clone formation

The disadvantage of parthenogenesis is

1. Simpler than sexual reproduction
2. Uniparental
3. Rapid formation of offsprings
4. Does not encourage the appearance of new and advantageous combinations of genes

Cell division is the mode of reproduction in

1. Monerans
2. Protists
3. Both (1) and (2)
4. None of these

Reproduction in Amoeba is carried out through

1. Plasmogamy
2. Gemmule formation
3. Binary fission
4. Budding

Single celled organisms are not reproduced by

1. Bulbils
2. Binary fission
3. Buds
4. Zoospores

Under unfavourable condition the Amoeba withdraws its pseudopodia and secretes a covering around itself. This phenomenon is termed as .....

1. Parthenogenesis
2. Sexual reproduction
3. Encystation
4. Asexual reproduction

Which is not an example of vegetative propagule in angiosperms?

1. Zoospores of Chlamydomonas
2. Eyes of Potato
3. Rhizome of Ginger
4. Bulbil of Agave

In potato, sugarcane, banana and ginger, the new plantlets invariably arise from

1. The nodes present in the modified stems
2. The nodes present in the modified roots
3. The internodes present in the modified roots
4. The margin of the leaves

The period from birth to the natural death of an organism represents its

1. Asexual reproduction
2. Sexual reproduction
3. Development
4. Life span

Clone is a group of individuals got through

1. Self pollination
2. Cross pollination
3. Vegetative propagation
4. Hybridisation

In the life span of any organism, there is a cycle of

1. Birth, growth and death
2. Birth, fertilisation and death
3. Juvenile, reproduction and senescence
4. Pre-fertilisation, fertilisation and post-fertilisation