Shukla&Khare classes 🔴

39. In cross-pollination, pollen grains are transferred: A) Within the same flower B) Within flowers of the same plant C) From a flower of one plant to a flower of another plant D) To the root 40. Which is not necessary for seed germination? A) Water B) Air C) Suitable temperature D) Intense light 41. Through which structure does the embryo receive nutrition? A) Placenta B) Style C) Ovule D) Anther 42. The onset of adolescence is generally caused by: A) Hormone secretion B) Vitamins C) Minerals D) Water 43. Testosterone hormone is secreted from: A) Ovary B) Testis C) Uterus D) Thyroid 44. Estrogen hormone is secreted from: A) Ovary B) Testis C) Liver D) Heart 45. The process of implantation of human embryo in the uterus is called: A) Fertilization B) Implantation C) Pollination D) Germination 46. AIDS is caused by: A) Bacteria B) Fungi C) Virus D) Protozoa 47. The full form of HIV is: A) Human Immune Virus B) Human Immunodeficiency Virus C) Health Immune Virus D) Human Internal Virus 48. Reproduction in banana generally occurs through: A) Seeds B) Vegetative propagation C) Spores D) Fertilization 49. Sugarcane is generally propagated through: A) Seeds B) Roots C) Stem cuttings D) Leaves 50. Male gamete in plants is found in: A) Pollen grain B) Ovary C) Ovule D) Fruit 51. Female gamete in plants is found in: A) Anther B) Ovule C) Petal D) Sepal 52. After fertilization, the embryo develops from: A) Zygote B) Pollen grain C) Style D) Ovary 53. An example of regeneration is: A) Planaria B) Human C) Cow D) Pigeon 54. The gestation period in humans is approximately: A) 180 days B) 220 days C) 280 days D) 350 days 55. The cessation of menstruation is a possible sign of pregnancy. A) True B) False 56. Sexual reproduction produces genetic variation. A) True B) False 57. Testes are located outside the body in a sac-like structure called: A) Placenta B) Scrotum C) Uterus D) Urinary bladder 58. What is the main difference between pollination and fertilization? A) Both are the same B) In pollination, fusion of gametes occurs C) In fertilization, fusion of gametes occurs D) Seeds are formed in pollination 59. Which chromosomes are responsible for sex determination in humans? A) XX and XY B) AA and BB C) PP and QQ D) ZZ and YY 60. The main purpose of reproduction is: A) To obtain food B) To grow C) To maintain the continuity of species D) To respire ---