0 123456789101112131415 Science : Ch 08 – How do Organisms Reproduce This test is designed based on NCERT Syllabus for Class 10 Topics : How do Organisms Reproduce Each time random 15 questions will be displaced So retake the quiz till you have mastered all the questions 1 / 15 Offspring produced by asexual method of reproduction have more similarity among themselves because: Asexual reproduction involves only one parent Asexual reproduction does not involve gametes Asexual reproduction occurs before sexual reproduction Asexual reproduction occurs after sexual reproduction only one parent is involved in the Asexual reproduction ,there is no fusion of male and female gamates. only one parent is involved in the Asexual reproduction ,there is no fusion of male and female gamates. 2 / 15 Fertilisation is the process of Transfer of male gamete to female gamete Fusion of nuclei of male and female gamete. Adhesion of male and female reproductive organs The formation of gametes by a reproductive organ formation of single cell during sexual reproduction by fusion of nuclei of male and female gamates. formation of single cell during sexual reproduction by fusion of nuclei of male and female gamates. 3 / 15 The number of chromosomes in parents and offsprings of a particular species remains constant due to: Halving of chromosomes during gamete formation Doubling of chromosomes after zygote formation Halving of chromosomes during gamete formation Doubling of chromosomes after gamete formation Halving of chromosomes after gamate formation Reduction division (meiosis) takes place during gamete formation. Reduction division (meiosis) takes place during gamete formation. 4 / 15 Factors responsible for the rapid spread of bread mould on slices of bread are: Large number of spores Availability of moisture and nutrients in the bread Presence of tubular branched hyphae Formation of round shaped sporangia 1 2 1 And 2 1 and 3 Bread mould prefers damp/warm conditions with ample nutrient supply, on which air-borne spores land and germinate. Bread mould prefers damp/warm conditions with ample nutrient supply, on which air-borne spores land and germinate. 5 / 15 Which of the following statements are true for fowers? Flowers are always bisexual They are the sexual reproductive organs They are produced in all groups of plants After fertilization they give rise to fruits 2 And 4 1 and 2 2 and 3 1 and 4 Flowers are the sexually reproductive organs of a plant and a fertilized flower give rise to fruit Flowers are the sexually reproductive organs of a plant and a fertilized flower give rise to fruit 6 / 15 During adolescence, several changes occur in the human body. mark one change from the following associated with sexual maturation in boys: Loss of milk teeth Increase in height Cracking of voice Weight gain Cracking of voice in males is due to male hormone testosterone, which is produced after sexual maturation Cracking of voice in males is due to male hormone testosterone, which is produced after sexual maturation 7 / 15 Which among the following statements are true for sexual reproduction in fowering plants? It requires two types of gametes. Fertilisation is a compulsory event. It always results in the formation of zygote. Offsprings formed are clone 1 , 2 and 3 2 and 3 1 and 3 2 and 4 Sexual reproduction involves fertilisation of male and female gametes to produce zygote having genetic variations. Clones cannot be produced through it as clones are identical copies of parent organism. Sexual reproduction involves fertilisation of male and female gametes to produce zygote having genetic variations. Clones cannot be produced through it as clones are identical copies of parent organism. 8 / 15 Characters transmitted from parents to ofspring are present in: Cytoplasm RIbosome Golgi complex Genes Genes are the unit of heredity DNA that determine genetic characters in an organism. Genes are the unit of heredity DNA that determine genetic characters in an organism. 9 / 15 Which one of the following permanently marks the end of menstrual cycle in females ? Menarche Menopause Ovulation Pregnancy Menopause is a natural process at the age of 40s or 50s in case of human females. Menopause occurs when a women has not have her menstrual cycle for 12 consecutive months and can no longer become pregnant naturally. Menopause is a natural process at the age of 40s or 50s in case of human females. Menopause occurs when a women has not have her menstrual cycle for 12 consecutive months and can no longer become pregnant naturally. 10 / 15 Assertion (A): Variation is useful for the survival of species over time. Reason (R) : Populations of organisms fill well-defined places in the ecosystem, using their ability to reproduce Both (A) and (R) are true and (R) is correct explanation of the assertion Both (A) and (R) are true but (R) is not the correct explanation of the assertion (A) is true but (R) is false (A) is false but (R) is true Reproduction is linked to the stability of populations of species., but variation is useful for the survival of species. Reproduction is linked to the stability of populations of species., but variation is useful for the survival of species. 11 / 15 What is the mode of asexual reproduction in Rhizopus Spore Formation Fragmentation Budding Binary Fission 12 / 15 What is the mode of asexual reproduction in Spirogyra Spore Formation Budding Binary Fission Fragmentation 13 / 15 What do you understand by Puberty? The age at which the reproductive organs of boys and girls become non functional. The age at which the reproductive organs of boys and girls become functional. It is a process of fertilisation in boys and girls. None of these 14 / 15 In flowers,what is the female reproductive part called as? Pistil Or Carpel Ovaries Filaments Stigma 15 / 15 A pair of long convoluted tubes that carry ova or eggs from the ovary to the uterus is known as Tubectomy Callopian Tube Fallopian Tube All Of These Your score is 0% Restart quiz