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| # | Question | Subject and topic | Difficulty |
|---|---|---|---|
| 1451 | Which plant shows water pollination? | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Easy |
| 1452 | 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 |
| 1453 | Which feature is typical of a wind-pollinated flower? | Biology/Biological Studies/Biotechnology/Biochemistry Pollination |
Medium |
| 1454 | 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 |
| 1455 | The fusion of a male gamete with the two polar nuclei is called | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Easy |
| 1456 | Into which cell of the embryo sac does the pollen tube usually discharge its contents? | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Easy |
| 1457 | Why is fertilisation in angiosperms called "double" fertilisation? | Biology/Biological Studies/Biotechnology/Biochemistry Double fertilisation |
Medium |
| 1458 | 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 |
| 1459 | 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 |
| 1460 | Into what does the ovule develop after fertilisation? | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Easy |
| 1461 | Which of these is an albuminous seed? | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Easy |
| 1462 | The tender coconut water and the white kernel of coconut respectively represent | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Medium |
| 1463 | 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 |
| 1464 | Apple is called a false fruit because | Biology/Biological Studies/Biotechnology/Biochemistry Post-fertilisation events |
Hard |
| 1465 | Formation of seeds without fertilisation is called | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Easy |
| 1466 | Banana is a natural example of | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Easy |
| 1467 | Embryos formed from nucellar cells in Citrus are genetically | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Medium |
| 1468 | Why is the introduction of apomixis into hybrid crop varieties of great interest? | Biology/Biological Studies/Biotechnology/Biochemistry Special modes |
Medium |
| 1469 | 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 |
| 1470 | Which cells of the testis secrete androgens? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Easy |
| 1471 | Which layer of the uterus undergoes cyclic changes during the menstrual cycle? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Easy |
| 1472 | Why are the testes located in the scrotum outside the abdominal cavity? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Medium |
| 1473 | Which is the correct sequence of the path taken by sperm? | Biology/Biological Studies/Biotechnology/Biochemistry Male and female reproductive systems |
Medium |
| 1474 | 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 |
| 1475 | The transformation of spermatids into spermatozoa is called | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Easy |
| 1476 | Which part of the sperm contains enzymes that help it penetrate the ovum? | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Easy |
| 1477 | At the time of ovulation in humans, the cell released from the Graafian follicle is a | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Medium |
| 1478 | 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 |
| 1479 | In spermatogenesis, which hormone acts on Sertoli cells, and which acts on Leydig cells? | Biology/Biological Studies/Biotechnology/Biochemistry Gametogenesis |
Hard |
| 1480 | Which event directly triggers ovulation? | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Easy |
| 1481 | The first menstruation at puberty is called | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Easy |
| 1482 | Which hormone, secreted by the corpus luteum, is essential to maintain the endometrium? | Biology/Biological Studies/Biotechnology/Biochemistry Menstrual cycle |
Medium |
| 1483 | 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 |
| 1484 | 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 |
| 1485 | In humans, fertilisation normally takes place in the | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Easy |
| 1486 | The stage of the human embryo that becomes embedded in the endometrium is the | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Easy |
| 1487 | Which part of the blastocyst gives rise to the embryo proper? | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Medium |
| 1488 | Why is the sex of a human child said to be determined by the father? | Biology/Biological Studies/Biotechnology/Biochemistry Fertilisation and implantation |
Medium |
| 1489 | 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 |
| 1490 | Which hormone is produced only during pregnancy and is detected by pregnancy test kits? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Easy |
| 1491 | The first milk secreted after childbirth, rich in antibodies, is called | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Easy |
| 1492 | Which hormone causes strong uterine contractions during parturition? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Medium |
| 1493 | 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 |
| 1494 | Why is parturition described as a positive feedback process? | Biology/Biological Studies/Biotechnology/Biochemistry Pregnancy, parturition and lactation |
Hard |
| 1495 | Amniocentesis involves examining | Biology/Biological Studies/Biotechnology/Biochemistry Reproductive health problems and strategies |
Easy |
| 1496 | Why has amniocentesis for sex determination been banned in India? | Biology/Biological Studies/Biotechnology/Biochemistry Reproductive health problems and strategies |
Easy |
| 1497 | Which of the following is an indicator of improved reproductive health in a society? | Biology/Biological Studies/Biotechnology/Biochemistry Reproductive health problems and strategies |
Medium |
| 1498 | A school introduces age-appropriate sex education. Which goal of reproductive health does this mainly serve? | Biology/Biological Studies/Biotechnology/Biochemistry Reproductive health problems and strategies |
Medium |
| 1499 | A pregnant woman of advanced age is advised a test to check whether the foetus has an extra copy of chromosom… | Biology/Biological Studies/Biotechnology/Biochemistry Reproductive health problems and strategies |
Hard |
| 1500 | Which of the following is a copper-releasing IUD? | Biology/Biological Studies/Biotechnology/Biochemistry Birth control and population stabilisation |
Easy |