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In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?
Match the plant with the kind of life cycle it exhibits:
Which one is wrongly matched?
Winged pollen grains are present in
Which of the following statements is correct?
Conifers are adapted to tolerate extreme environmental conditions because of:
Which one of the following statements is wrong?
Which one of the following shows isogamy with non-flagellated gametes?
Which one of the following is wrong about Chara?
Which of the following is responsible for peat formation?
Isogamous condition with non-flagellated gametes is found in
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Read the following statements (A–E) and answer the question that follows them: (A) In liverworts, mosses and ferns gametophytes are free-living. (B) Gymnosperms and some ferns are heterosporous. (C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous. (D) The sporophyte in liverworts is more elaborate than that in mosses. (E) Both Pinus and Marchantia are dioecious. How many of the above statements are correct?
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Monoecious plant of Chara shows occurrence of
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Read the following five statements (A-B) and answer as asked next to them: (a) In Equisetum the female gametophyte is retained on the parent sporophyte (b) In Ginkgo male gametophyte is not independent (c) The sporophyte in Riccia is more developed than that in Polytrichum (d) Sexual reproduction in Volvox is oogamous (e) The spores of slime molds lack cell walls How many of the above statements are correct?
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Which one of the following pairs is wrongly matched?
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Consider the following four statements whether they are correct or wrong: (A) The sporophyte in liverworts is more elaborate than that in mosses (B) Salvinia is heterosporous (C) The life-cycle in all seed-bearing plants is diplontic (D) In Pinus male and female cones are borne on different trees Which of the following combinations is correct?
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Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because:
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Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.
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Examine the figures A, B, C and D. In which one of the four options all the items A, B, C and D are correct?
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Examine the figures (A-D) given below and select the right option out of 1-4, in which all the four structures A, B, C and D are identified correctly.
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Fill in the blanks with suitable words given in boxes: (a) Rhizophora has both _______________________and _________________ (b) Aquatic plants are ______________________(Pteridophyte) and _____________________ (Angiosperm) (c) Plant bearing both male and female flowers is called______________and the pollination between different flowers of the same plant is called_______________. (d) ____________has ______________.
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Give any two conditions for seed habit.
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Among the following pairs, which one shows the tendency of seed habit?
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Conifers differ from grasses in the:
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In a moss the sporophyte:
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