Free Reproduction MCQs with Answers
1,220 Reproduction MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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Read the Reproduction notesFree MDCAT chapter notes with key terms1,220 questions · page 51 of 61
- A. Pseudopollination
- B. Pseudoparthenocarpy
- C. Mimicry
- D. Pseudocopulation
Explanation: In an orchid Ophrys speculum, there is most interesting and unique mechanism of pollination.
Correct answer: Pseudopollination- A. Tetraploid
- B. Pentaploid
- C. Haploid
- D. Triploid
Explanation: If the female plant is tetraploid, then the central cell of the embryo sac, which is a fused polar nucleus, will also be tetraploid.
Correct answer: Triploid- A. Development of anthers
- B. Opening of flower bud
- C. Stigma receptors
- D. Formation of Pollen:
Explanation: Anthesis is the process of opening floral buds. The reception of pollen by stigma is called pollination.
Correct answer: Opening of flower bud- A. Autogamy
- B. Geitonogamy
- C. Xenogamy
- D. Allogamy
Explanation: Geitonogamy is the transfer of pollen grains from the anther to stigma of another flower on the same plant or genetically similar plant…
Correct answer: Geitonogamy- A. 200/400
- B. 400/800
- C. 300/600
- D. 250/500
Explanation: Number of meiotic divisions required to produce 200/400 seeds of pea would be 250/500.
Correct answer: 250/500- A. Orthotropous
- B. Anatropous
- C. Campylotropous
- D. Amphitropous
Explanation: In hemianatropous or hemitropous ovule, the nucellus and integuments are at right angles to stalk or funiculus so that the ovule becomes…
Correct answer: Orthotropous- A. Apomixis
- B. Embryology
- C. Embryogeny
- D. Cytology
Explanation: Study of formation, growth and development of new individual from an egg is embryology.
Correct answer: Embryology1008. Syngamy means:
- A. Fusion of gametes
- B. Fusion of cytoplasms
- C. Fusion of two similar spores
- D. Fusion of two dissimilar spores
Explanation: Syngamy means fusion of gametes. Syngamy is the phenomenon in which male gamete fuses with an egg.
Correct answer: Fusion of gametes1009. Point out the odd one.
- A. Nucellus
- B. Embryo sac
- C. Micropyle
- D. Pollen grain
Explanation: Pollen grain is odd one among all the other three. Pollen grain is a male gametophytic structure whereas all the other three are found…
Correct answer: Pollen grain- A. Nucellus and antipodal cells
- B. Antipodal cells and egg cell
- C. Antipodal cells and megaspore mother cell
- D. Nucellus and primary endosperm nucleus
Explanation: Antipodal cells and egg cell are haploid structures as they are formed after meiosis while the others nucellus, megaspore mother cell and…
Correct answer: Antipodal cells and egg cell1011. Embryo sac occurs in:
- A. Embryo
- B. Axis part of embryo
- C. Ovule
- D. Endosperm
Explanation: Embryo sac occurs in ovule. Ovule is integumented megasporangium. It consists of nucleus covered by one or two integuments, mounted on a…
Correct answer: Ovule1012. Pollination occurs in
- A. Bryophytes and angiosperms
- B. Pteridophytes and angiosperms
- C. Angiosperms and gymnosperms
- D. Angiosperms and fungi
Explanation: The term pollination refers to the transfer of pollen from anther to stigma.
Correct answer: Angiosperms and gymnosperms- A. Chalazogamy
- B. Mesogamy
- C. Porogamy
- D. Pseudogamy
Explanation: In most of the plants the pollen tube enters the ovule through the micropyle and the phenomenon is called as porogamy.
Correct answer: Porogamy- A. Base pairing of their DNA and RNA
- B. Formation of hydrogen bonds
- C. Mutual attraction due to differences in electrical charges
- D. Attraction of their protoplasts
Explanation: The two gametes i.e., sperm released by pollen tube and egg move in opposite direction by an unknown mechanism but most probably by…
Correct answer: Attraction of their protoplasts- A. Ovule
- B. Megaspore mother cell
- C. Embryo sac
- D. Nucellus
Explanation: Female gametophyte of angiosperms is represented by embryo sac. The polygonum type of embryo sac contains 8nuclei and 7cells.
Correct answer: Embryo sac- A. Microsporangium
- B. Nucellus
- C. Microspore
- D. Stamen.
Explanation: Male gametophyte of angiosperms is a microspore. Microspore is haploid, uninucleate, minute spores produced in large numbers as a result…
Correct answer: Microspore- A. Anther wall
- B. Tapetal layer of anther wall
- C. Connective tissue
- D. Young pollen grains
Explanation: Young pollen grains produce androgenic haploids in anther cultures. Because rest all i.e., anther wall, tapetal layer of anther wall and…
Correct answer: Young pollen grains1018. Which is correct?
- A. Gametes are invariably haploid
- B. Spores are invariably haploid
- C. Gametes are generally haploid
- D. Both spores and gametes are invariably haploid
Explanation: Gametes are invariably haploid. Spores are formed in lower plants by mitotic division and they may be diploid but gametes are always be…
Correct answer: Gametes are invariably haploid- A. Vegetative cell is not damaged.
- B. Contents of killed generative cell stimulate pollen growth
- C. Laser beam stimulates growth of pollen tube
- D. The region of emergence of pollen tube is not harmed
Explanation: Generative cell was destroyed by laser but a normal pollen tube was still formed because vegetative cell is not damaged.
Correct answer: Vegetative cell is not damaged.1020. Nucellar embryo is:
- A. Amphimictic haploid
- B. Amphimictic diploid
- C. Apomictic haploid
- D. Apomictic diploid
Explanation: Nucellar embryo is apomictic diploid. Substitution of usual sexual reproduction by a form of reproduction which does not include meiosis…
Correct answer: Apomictic diploid