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Recent questions tagged reproduction in organism

Fertilization leads to the formation of embryo. <br> a. Give the technical term for the development of embryo. <br> b. What are the events that occur during embryo development? <br> c. The development of zygote depends on two factors. What are they? <br> d. How will you categorise animals based on the development of zygote inside or outside the female body? <br> e. How does zygote in fungi and algae overcome dessication?

asked Feb 7, 2019 by priyanka.clay6

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Study the following diagram and answer the questions given below:

asked Feb 7, 2019 by priyanka.clay6

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Why is vegetative propagation considered as asexual reproduction? Which is better mode: Sexual or asexual? Why?

asked Feb 7, 2019 by priyanka.clay6

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Distinguish between gametogenesis and embryogenesis.

asked Feb 7, 2019 by priyanka.clay6

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Complete the flowchart with reference to the reproduction of flower.

asked Feb 7, 2019 by priyanka.clay6

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Can we consider simple cell division as a method of reproduction? What will you call this kind of reproduction? Give two examples in support of your answer.

asked Feb 7, 2019 by priyanka.clay6

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In a pond ecosystem you may find the plant with purple flowers that spread very fast to cover the entire pond within a short span of time. How does it spread? How does it harm the aquatic body?

asked Feb 7, 2019 by priyanka.clay6

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Give the term for kinds of gametes in the given figures A and B . In the figure A give the specific terms for the gametes.

asked Feb 7, 2019 by priyanka.clay6

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Give the term for the following figure A,B and C.

asked Feb 7, 2019 by priyanka.clay6

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What are oviparous and viviparous animals? Give examples.

asked Feb 7, 2019 by priyanka.clay6

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What is parthenogenesis? Give an example.

asked Feb 7, 2019 by priyanka.clay6

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Write the sexuality in the following organisms. <br> (a) Earthworm <br> (b) Cockroach <br> (c) Chara <br> (d) Marchantia <br> (e) Sweet Potato <br> (f) Leech.

asked Feb 7, 2019 by priyanka.clay6

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Explain the features exhibited by the organisms showing external fertilization to Enhance the chances of syngamy .What is the disadvantage of external fertilization ?

asked Feb 6, 2019 by priyanka.clay6

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Name the asexual reproductive structures of the following: Chlamydomonas, Penicillum, Hydra, Sponge.

asked Feb 6, 2019 by priyanka.clay6

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Life spans of organisms are not necessarily correlated with their sizes. Explain

asked Feb 6, 2019 by priyanka.clay6

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How do the following organisms reproduce? Yeast, Amoeba.

asked Feb 6, 2019 by priyanka.clay6

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Gametes are always haploid .How are the gametes produced from a haploid plant body and a diploid plant body?

asked Feb 6, 2019 by priyanka.clay6

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Differentiate between asexual and sexual method of reproduction.

asked Feb 6, 2019 by priyanka.clay6

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What will happen if meiosis does not take place during gametogenesis?

asked Feb 6, 2019 by priyanka.clay6

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Arrange the following events in proper sequence: <br> a. Embryogenesis <br> b. Fertilization <br> c. Gametogenesis <br> d. Zygote formation.

asked Feb 6, 2019 by priyanka.clay6

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Can we refer the off-springs formed by asexual reproduction, as a clone? If yes, why?

asked Feb 6, 2019 by priyanka.clay6

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Why dogs and cats have oestrus cycle but human beings have menstrual cycle, though all are mammals?

asked Feb 6, 2019 by priyanka.clay6

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Name the process of development of embryo from the zygote. What are the two changes which the zygote undergoes during this process?

asked Feb 6, 2019 by priyanka.clay6

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Though ginger is found under the soil. Yet it is not a root, but stem. Justify your answer with two reasons. (ii) What are the specialized cells which undergo meiosis in the diploid organisms, called as?

asked Feb 6, 2019 by priyanka.clay6

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Why can't man be oviparous? Justify the statement.

asked Feb 6, 2019 by priyanka.clay6

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Label A and B and write the type of the vegetative propagule.

asked Feb 6, 2019 by priyanka.clay6

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Identify the given plants. <br> How are they different from each other with regard to reproductive organs they possess ?

asked Feb 6, 2019 by priyanka.clay6

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Sexual reproduction involves fertilization and the formation of embryo. What are the critical events needed for the successful reproduction process?

asked Feb 6, 2019 by priyanka.clay6

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Categorise the following plants based on the floral characteristics: Hibiscus, Cucumber, Papaya, Guava.

asked Feb 6, 2019 by priyanka.clay6

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Do you agree with the statement only asexual reproduction can give rise to individuals resembling their parent? Support your answer with an example.

asked Feb 6, 2019 by priyanka.clay6

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In non-primate mammals like cows, sheep, rats, deer etc, the cyclical changes that occur during reproduction are called oestrus cycle whereas in primates it is called as menstrual cycle. How can we distinguish between them?

asked Feb 6, 2019 by priyanka.clay6

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Reptiles and frogs are oviparous animals; yet they differ in certain aspects of reproduction. Bring out the differences and mention which of the two animals has more advantage. Give one reason.

asked Feb 6, 2019 by priyanka.clay6

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Give the chromosome number in the gametes of the following, if the number of chromosomes in their meiocytes is as follows: <br> a. Dog-78 <br> b.Rice – 24 <br> c. Housefly – 12 <br>d. Butterfly -380

asked Feb 5, 2019 by priyanka.clay6

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Fill in the missing columns: <br>

asked Feb 5, 2019 by priyanka.clay6

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In seed plants how are the non-motile gametes carried to female gamete?

asked Feb 5, 2019 by priyanka.clay6

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Name the plant which flower only once in their life time.

asked Feb 5, 2019 by priyanka.clay6

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Name the type of plants that show clear cut vegetative, reproductive and senescent phases.

asked Feb 5, 2019 by priyanka.clay6

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What is a vegetative phase in plants?

asked Feb 5, 2019 by priyanka.clay6

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What do you mean by clones?

asked Feb 5, 2019 by priyanka.clay6

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Name the structure from where every sexually reproducing organism begins their life.

asked Feb 5, 2019 by priyanka.clay6

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Name the type of fertilization wherein the survival of the organism up to adulthood is threatened.

asked Feb 5, 2019 by priyanka.clay6

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Name the scientific name of the plant which flower once in 12 years.

asked Feb 5, 2019 by priyanka.clay6

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Name the stage of growth and maturity in the life of animals before they can reproduce sexually.

asked Feb 5, 2019 by priyanka.clay6

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The type of reproduction wherein the off springs produced are identical to each other and to the parent.

asked Feb 5, 2019 by priyanka.clay6

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What is the significance of reproduction?

asked Feb 5, 2019 by priyanka.clay6

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In a culture there is a mixture of haploid and diploid cells. It must be because of a) Generative cells b) Vegetative cells c) anther wall d) pollen cells

asked Feb 5, 2019 by priyanka.clay6

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Why do organisms like algae and fungi which normally adopt asexual reproduction switch over to sexual method of reproduction just before the onset of adverse conditions?

asked Feb 5, 2019 by priyanka.clay6

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Most sugarcane varieties cultivated today are aneuploids and are sterile. But they grow and perform extremely well. Sterility in sugarcane is not of any disadvantage. Why?

asked Feb 5, 2019 by priyanka.clay6

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If a branch “dasheri mango” is grafted on a tree producing “desi mangoes” what type of mangoes will be borne on grafted branch& other branches of the plant?

asked Feb 5, 2019 by priyanka.clay6

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Fertilization results in the production of zygote. Zygote is called as a vital link. Why is it called so?

asked Feb 5, 2019 by priyanka.clay6

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