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295 questions found · practise this subject as a set
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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1 | Which layer of the microsporangium wall nourishes the developing pollen grains? | Biology/Biological Studies/Biotechnology/Biochemistry Flower structure and gametophytes |
Easy |
| 2 | The exine of a pollen grain is mainly made of which substance? | Biology/Biological Studies/Biotechnology/Biochemistry Flower structure and gametophytes |
Easy |
| 3 | How many mitotic divisions of the functional megaspore nucleus are needed to form a typical 8-nucleate embryo… | Biology/Biological Studies/Biotechnology/Biochemistry Flower structure and gametophytes |
Medium |
| 4 | In a typical angiosperm embryo sac, which cells lie at the micropylar end along with the egg? | Biology/Biological Studies/Biotechnology/Biochemistry Flower structure and gametophytes |
Medium |
| 5 | If the nucellus cell of a plant has 24 chromosomes, how many chromosomes will be present in the egg cell and … | Biology/Biological Studies/Biotechnology/Biochemistry Flower structure and gametophytes |
Hard |
| 6 | Transfer of pollen from the anther to the stigma of another flower on the same plant is called | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Easy |
| 7 | Which plant shows water pollination? | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Easy |
| 8 | A plant species bears only male flowers on some individuals and only female flowers on others. Which forms of… | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Medium |
| 9 | Which feature is typical of a wind-pollinated flower? | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Medium |
| 10 | A breeder working with a bisexual flower wants to ensure only pollen of a chosen male parent reaches the stig… | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Hard |
| 11 | The fusion of a male gamete with the two polar nuclei is called | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Easy |
| 12 | Into which cell of the embryo sac does the pollen tube usually discharge its contents? | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Easy |
| 13 | Why is fertilisation in angiosperms called "double" fertilisation? | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Medium |
| 14 | A plant has a pollen grain with 10 chromosomes. How many chromosomes will be found in a cell of its endosperm… | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Medium |
| 15 | In an angiosperm, how many male gametes are needed to fertilise 20 ovules, assuming each ovule receives one p… | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Hard |
| 16 | Into what does the ovule develop after fertilisation? | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Easy |
| 17 | Which of these is an albuminous seed? | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Easy |
| 18 | The tender coconut water and the white kernel of coconut respectively represent | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Medium |
| 19 | In a monocot embryo, the sheath that encloses the radicle and root cap is called the | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Medium |
| 20 | Apple is called a false fruit because | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Hard |
| 21 | Formation of seeds without fertilisation is called | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Easy |
| 22 | Banana is a natural example of | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Easy |
| 23 | Embryos formed from nucellar cells in Citrus are genetically | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Medium |
| 24 | Why is the introduction of apomixis into hybrid crop varieties of great interest? | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Medium |
| 25 | A farmer sprays a growth hormone on unpollinated flowers and obtains seedless fruits. A seed contains three e… | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Hard |
| 26 | Which cells of the testis secrete androgens? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Easy |
| 27 | Which layer of the uterus undergoes cyclic changes during the menstrual cycle? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Easy |
| 28 | Why are the testes located in the scrotum outside the abdominal cavity? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Medium |
| 29 | Which is the correct sequence of the path taken by sperm? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Medium |
| 30 | A man's seminiferous tubules contain plenty of germ cells but sperm fail to mature properly because the cells… | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Hard |
| 31 | The transformation of spermatids into spermatozoa is called | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Easy |
| 32 | Which part of the sperm contains enzymes that help it penetrate the ovum? | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Easy |
| 33 | At the time of ovulation in humans, the cell released from the Graafian follicle is a | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Medium |
| 34 | How many sperm and how many ova are formed from 50 primary spermatocytes and 50 primary oocytes respectively? | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Medium |
| 35 | In spermatogenesis, which hormone acts on Sertoli cells, and which acts on Leydig cells? | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Hard |
| 36 | Which event directly triggers ovulation? | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Easy |
| 37 | The first menstruation at puberty is called | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Easy |
| 38 | Which hormone, secreted by the corpus luteum, is essential to maintain the endometrium? | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Medium |
| 39 | In a woman with a regular 28-day cycle, during which days does the follicular (proliferative) phase mainly oc… | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Medium |
| 40 | If the corpus luteum of a non-pregnant woman were made to persist and keep secreting progesterone, what would… | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Hard |
| 41 | In humans, fertilisation normally takes place in the | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Easy |
| 42 | The stage of the human embryo that becomes embedded in the endometrium is the | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Easy |
| 43 | Which part of the blastocyst gives rise to the embryo proper? | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Medium |
| 44 | Why is the sex of a human child said to be determined by the father? | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Medium |
| 45 | A secondary oocyte released at ovulation never meets a sperm. What will be the fate of its second meiotic div… | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Hard |
| 46 | Which hormone is produced only during pregnancy and is detected by pregnancy test kits? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Easy |
| 47 | The first milk secreted after childbirth, rich in antibodies, is called | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Easy |
| 48 | Which hormone causes strong uterine contractions during parturition? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Medium |
| 49 | By the end of the first trimester of human pregnancy, which development is generally complete? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Medium |
| 50 | Why is parturition described as a positive feedback process? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Hard |