This practice test includes 25 questions from the chapter Reproduction in organism class 12. It is useful for NEET aspirants as well as 12th-class students.
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Q.1.
Which of the following groups is formed only of the hermaphrodite organisms?
- Earthworm, tapeworm, housefly, frog
- Earthworm, tapeworm, seahorse housefly
- Earthworm, leech, sponge, roundworm
- Earthworm, tapeworm, leech, sponge
Answer:
(d) Earthworm, tapeworm, leech, sponge
Explanation: roundworm, housefly, frog, seahorse aren’t hermaphrodite
Explanation: roundworm, housefly, frog, seahorse aren’t hermaphrodite
Q.2.
Which of the following options shows bisexual animals only?
- Amoeba, sponge, leech
- Sponge, cockroach, Amoeba
- Earthworm, sponge, leech
- Tapeworm, earthworm, honeybee
Answer:
(C)
Explanation: Amoeba,cockroach, honeybee,Tapeworm aren’t bisexual.
Explanation: Amoeba,cockroach, honeybee,Tapeworm aren’t bisexual.
Q.3.
Read the following statements and select the incorrect one.
- Cucurbits and coconuts are monoecious plants
- Papayas and date palms are dioecious plants.
- Leeches and tapeworms are bisexual animals.
- Sponges and coelenterates are unisexual animals
Answer:
(d) Sponges and coelenterates are unisexual animals
Explanation: Sponges and coelenterates are bisexual animals
Explanation: Sponges and coelenterates are bisexual animals
Q.4.
Meiosis does not occur in
- asexually reproducing diploid individuals
- sexually reproducing haploid individuals
- sexually reproducing diploid individuals
- all of these.
Answer:
(a) asexually reproducing diploid individuals
Explanation: It occurs in all except asexually reproducing diploid individuals
Explanation: It occurs in all except asexually reproducing diploid individuals
Q.5.
A diploid parent plant body produces ________ gametes and a haploid parent plant body produces ________gametes.
- diploid, haploid
- haploid, diploid
- diploid, diploid
- haploid, haploid
Answer:
(d) haploid, haploid
Explanation: haploid, haploid
Explanation: haploid, haploid
Q.6.
Which of the following organisms has the highest number of chromosomes?
- Housefly
- Butterfly
- Ophioglossum
- Onion
Answer:
(C)
Explanation: Ophioglossum has 1260 chromosomes.
Explanation: Ophioglossum has 1260 chromosomes.
Q.7.
In maize, a meiocyte has 20 chromosomes. What will be the number of chromosomes in its somatic cell?
- 40
- 30
- 20
- 10
Answer:
(c) 20
Explanation: 20
Explanation: 20
Q.8.
If a butterfly has chromosome number 360 in its meiocyte (2n). What will be the chromosome number in its gametes?
- 190
- 380
- 95
- 760
Answer:
(a) 190
Explanation: 190
Explanation: 190
Q.9.
In flowering plants, both male and female gametes are non-motile. The method to bring them together for fertilisation is
- water
- air
- pollination
- apomixis
Answer:
(c) pollination
Explanation: pollination is the only method to bring fertilisation
Explanation: pollination is the only method to bring fertilisation
Q.10.
In which of the following plants, sepals do not fall off after fertilisation and remain attached to the fruit?
- brinjal
- cucumber
- papaya
- Bitter gourd
Answer:
(a) brinjal
Explanation: brinjal sepals do not fall off after fertilisation and remain attached to the fruit
Explanation: brinjal sepals do not fall off after fertilisation and remain attached to the fruit
Q.11.
The wall of the ovary forms
- pericarp
- fruit wall
- fruit
- both (a) and (b).
Answer:
(d) both (a) and (b).
Explanation: both (a) and (b).
Explanation: both (a) and (b).
Q.12.
The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because
- offspring do not possess exact copies of parental DNA
- DNA of only one parent is copied and passed on to the offspring
- offspring are formed at different times
- DNA of parent and offspring are completely different
Answer:
(a) offspring do not possess exact copies of parental DNA
Explanation: Because offspring do not possess exact copies of parental DNA
Explanation: Because offspring do not possess exact copies of parental DNA
Q.13.
The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively
- 12, 24, 12
- 24, 12, 12
- 12, 24, 24
- 24, 12, 24
Answer:
(c) 12, 24, 24
Q.14.
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
- nodes are shorter than intemodes
- nodes have meristematic cells
- nodes are located near the soil
- nodes have non-photosynthetic cells.
Answer:
(b) nodes have meristematic cells
Explanation: nodes have meristematic cells
Explanation: nodes have meristematic cells
Q.15.
There is no natural death in single celled organisms like Amoeba and bacteria because
- they cannot reproduce sexually
- they reproduce be binary fission
- parental body is distributed among the offspring
- they are microscopic.
Answer:
(c) parental body is distributed among the offspring
Explanation: because parental body is distributed among the offspring
Explanation: because parental body is distributed among the offspring
Q.16.
There are various types of reproduction. The type of reproduction adopted by an organism depends on
- the habitat and morphology of the organism
- morphology of the organism
- morphology and physiology of the organism
- the organisms habitat, physiology and genetic makeup.
Answer:
(d) the organisms habitat, physiology and genetic makeup.
Explanation: It depends on the organisms habitat, physiology and genetic makeup.
Explanation: It depends on the organisms habitat, physiology and genetic makeup.
Q.17.
Which of the following is a post-fertilisation event in flowering plants?
- Transfer of pollen grains
- Embryo development
- Formation of flower
- Formation of pollen grains
Answer:
(b) Embryo development
Explanation: Only Embryo development comes under post fertilisation event.
Explanation: Only Embryo development comes under post fertilisation event.
Q.18.
The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be
- 20
- 10
- 40
- 15
Answer:
(a) 20
Explanation: 20
Explanation: 20
Q.19.
The growth phase of an organism before attaining sexual maturity is referred to as
- juvenile phase
- vegetative phase
- both (a) and (b)
- None of the above
Answer:
(c) both (a) and (b)
Explanation: both (a) and (b)
Explanation: both (a) and (b)
Q.20.
Select the monocarpic plant out of the following.
- Bamboo
- Litchi
- Mango
- all of these.
Answer:
(a) Bamboo
Explanation: Bamboo is the monocarpic plant
Explanation: Bamboo is the monocarpic plant
Q.21.
Clear cut vegetative, reproductive and senescent phases cannot be observed in
- annual plants
- perennial plants
- biennial plants
- ephemeral plants.
Answer:
(b) perennial plants
Explanation: In perennial Clear cut vegetative, reproductive and senescent phases
Explanation: In perennial Clear cut vegetative, reproductive and senescent phases
Q.22.
Strobilanthus kunthiana flowers once in
- 5 years
- 12 years
- 20 years
- 50 years
Answer:
(b) 12 years
Explanation: 12 years
Explanation: 12 years
Q.23.
Strobilanthus kunthiana differs from bamboo in
- being monocarpic
- length of juvenile phase
- being polycarpic
- none of these.
Answer:
(b) length of juvenile phase
Explanation: length of juvenile phase
Explanation: length of juvenile phase
Q.24.
Oestrous cycle is reported in
- cows and sheep
- humans and monkeys
- chimpanzees and gorillas
- none of these.
Answer:
(a) cows and sheep
Explanation: Rest doesn’t show oestrous cycle
Explanation: Rest doesn’t show oestrous cycle
Q.25.
Which of the following animals show menstrual cycle?
- Gorillas and chimpanzees
- Monkeys and humans
- Orangutans and monkeys
- All of these
Answer:
(d) All of these
Explanation: All of these
Explanation: All of these
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