Question

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Which of the following statements is FALSE? Seeds include a source of nourishment of the developing embryo. A selective disadvantage of seeds is that the seed coat is highly vulnerable to invasion by fungi and bacteria. Most plants that produce seeds also produce nonflagellated sperm. Many seeds can remain dormant during long periods of drought or low temperatures. 5. In seed plants, fertilization can occur without the presence of water. 2 The world's tallest plants are members of which group? Ginkophyta Gnetophyta Cycadophyta Coniferophyta Ginkophyta and Gnetophyta 4. Seed plants LACK which of the following structures? ovules surrounded by integuments microspores and megaspores vascular tissues a large, nutritionally independent sporophyte a large, nutritionally independent gametophyte In the life cycle of a pine tree germinating seeds develop into sporophytes microspores are produced by mitosis within a microsporangium each megaspore gives rise to a pollen grain pollen cones, unlike ovulate cones, tend to become woody as they mature all of the above

Answer 1

1. The statement which is false in the given options is-

Option no 2. A selective disadvantage of seeds is that the seed coast is highly vulnerable to invasion by fungi and bacteria- The hard coating on the seed plant protects the seed from any invasion by fungi and bacteria

The oher options given are all true

1- seeds include a source of nourishment of the developing embryo- One of the maid functions of the seed is to provide nourishment to the embryo.

3.most plants that produce seeds also produce nonflagellated sperm: some primitive gymnosperms have flagellated sperm cells while the sperm in most gymnosperms and all angiosperms which are nonflagellated.

4. Many seeds can remain dormant during long periods of drought or low temperatures: With evolution seeds accure dormancy as a trait to survive in adverse conditions such as heat, cold, drought, and salinity.

5. in seed plants fertilization can occur without the presence of water: Some of the plants like angiosperms which are the flowering plants, differ from seedless plants like mosses do not require water for the sperm to swim in to reach the egg. They rely on air and not on water for fertilization.

2) The worlds tallest plants are members of the group: Coniferophyta

3) Seedless plants and seed plants are similar to each other at many levels: They lack option c) A large nutritionally independent gametophyte.

They contain all the other options given

4) In the life cycle of a pine tree all the options except option 4) is correct

Pollen cones are the male cones which produce pollens and do not have woody stem to it even at full maturity. The ovulate cones on the other hand are female cones which produce seeds and are woody in nature.