Here are some critical Chapter 7 How do Organism Reproduce problems for Class 10 Science. These inquiries are intended to aid students in studying for and performing well on the CBSE Class 10 Science Examination 2023–24. Students can clear up their concerns and be ready for the exams by practising different types of questions. By answering these questions, you'll increase your confidence while also sharpening your problem-solving abilities.
Chapter 7, "How do Organisms Reproduce," in Class 10 Science, explores the fascinating world of reproduction. It delves into the remarkable ability of organisms to generate precise replicas of themselves, emphasizing various modes of reproduction employed by both single and multicellular organisms. This chapter also examines the intricate process of sexual reproduction, shedding light on the mechanisms that facilitate the perpetuation of life across diverse species.
Rhizopus is a saprobic fungus that feeds on dead organic materials that have decomposed. Rhizoids, stolons, and unbranched sporangiophores make up its body, which is made up of branching mycelium with three forms of hyphae: rhizoids, stolons, and unbranched sporangiophores.Rhizoids are hyphae that grow downward into the soil and help in water absorption. A stolen hypha is a slender horizontal hypha that aids in an organism's proliferation. Sporangiophores are unbranched tubular hyphae with rounded sporangia at their tips.Asexual reproduction is accomplished by sporangia, which produce non-motile multinucleate spores.
Development of the placenta and secretion of oestrogen is not the function of the testes at puberty.
AIDS – Acquired Immunodeficiency Syndrome
HIV – Human Immunodeficiency Virus
Pollination is the process of transfer of pollen grains from anther to the stigma of pistil. It is carried out by various pollinating agents like water, wind, insects, animals etc., whereas fertilisation is the process of fusion of male gamete with a female gamete to produce a zygote. It occurs in the embryo sac present inside the ovule.
Vegetative propagation is a method of asexual reproduction in plants where new plants are produced from vegetative parts of plants like root, stem and leaves. While animals cannot use this method of reproduction, plants can. This method is used to produce new plants by layering or grafting as in rose, jasmine, sugarcane and grapes for agriculture purposes. It has both benefits and some drawbacks. Some examples of vegetative propagation are shown below:
(i) Propagation by buds on leaf margins in Bryophyllum leaf. The buds that develop along the leaf margin fall on the soil and each of them develops into a new plant.
(ii) A small cutting of a money plant when kept in water in a glass container or in a pot with soil grows into a new plant.
(iii) Buds in potato and ginger can grow into new plants under suitable conditions.
(iv) In sweet potato, the roots bear adventitious buds which can grow into new plants under favourable conditions.
oswal.io offers a thorough set of questions for learning the topic in a better way if you're looking to further practise and improve your grasp of the concepts covered in the chapter.
Ans: The organisms reproduce in two ways-
Ans: The different modes of asexual reproduction include:
Ans: Plants reproduce sexually through pollination. In this process, the pollen from the anther of the flower is transferred to the stigma. The fusion of the male and female gametes takes place. A zygote is then formed which gives rise to an embryo. This leads to the formation of seed which gradually turns into a fruit.
Ans: This is a type of asexual reproduction in which a new organism grows from an outgrowth by cell division. It remains attached to the mother and derives nutrition from it. Once it matures it detaches itself from the mother and grows as an individual organism. This type of reproduction is seen in Hydra.
Ans: When a cell reproduces, DNA replication occurs which forms two similar copies of DNA.