27 28) W hich of the following ing structures is found in A)Fruits ) Spores C) S

Question

27 28) W hich of the following ing structures is found in A)Fruits ) Spores C) Seeds D) Seed coat E) Pollen tube 29) Which of the following adaptations have helped plants to live on lan AVascular tissue Gametangia C) Seeds D) All of the choices are correct E) None of the choices are correct 30) What part of gymnosperm life cycle is male gametophyte? A) Sperm cell B) Pollen grain C) Zygote D) Pollen cone E) Microspore 31) All fungi share which of the following characteristics? A) symbiotic B) heterotrophic C) flagellated D) pathogenic E) act as decomposers

Explanation / Answer

28) Correct answer is (A) fruits. Angiosperms are flowering and seed producing plants and in general seeds are covered by fruit but in case of gymnosperms, they are non flowering and naked seed producing plants. Gymnosperms do not have fruits. There are several differences between angiosperm and gymnosperm plants such as angiosperm plants have flowers and endosperm.

29) Correct answer is (A) vascular tissue. It is composed of xylem which take care of transport of solutes and water in plants and phloem which take care of transport of food and nutritive materials in plants irrespective of height of plants. Both xylem and phloem help plants to maitain large size.

30) Correct answer is (B) pollen grain. In gymnosperms, male and female gametophytes are produced by a leafy structure and pollen grains are produced in male cone that have microsporophylls.

31) Correct answer is (B) heterotrophic. For energy and to fulfill the demand of carbon, fungi take complex organic materials. It first digests the food and then ingest it. It is the main reason that diifferentiate fungi from heterotrophic animals.

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