STD 12 - 1. sexual reproduction in flowering plants — NEET STD 11 Science — Question

A high density of elephant population in an area can result in

Given below are two statements:
Statement I: Endarch and exarch are the terms often used for describing the position of primary xylem in the plant body.
Statement II: Endarch condition is the most common feature of the root system.
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Given below are two statements
Statement l:
In flowering plant the structure and function of tissue would also be dependent on location.
Statement II:
In flowering plant on the basis of structure and location of tissue, there are three types of tissue systems.
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Which condition is for photorespiration ?

Which one of the following statements are correct ?
(A) The roots of gymnosperm are generally fibrous roots.
(B) In Cycas, small specialized roots called coralloid roots are associated with nitrogen fixing cyanobacteria.
(C) In pteridophytes genera like selaginella and salvinia are homosporous.
(D) Majority of pteridophytes are hetero sporous.
(E) In gymnosperms, two kinds of spores produced within sporangia that are bome on sporophylls are arranged spirally along an axis to form lax or compact strobili or cones.
(F) In gymnosperms the cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili.
(G) The megaspore mother cell is differentiated from one of the cells of the nucellus in gymnosperms.
(H) The angiosperms are an exceptionally large group of plants occurring in wide range of habitats.
(I) The male gamete fuses with diploid secondary nucleus to produce the triploid primary endosperm nucleus (PEN) in angiosperm.
(J) The ovules develop into seeds and the ovaries develop into fruit after fertilization.
(K) The diploid sporophyte is the dominant, photosynthetic, dependent phase of the plant. The gametophytic phase is represented by single to few-celled haploid gametophyte. This kind of life cycle is termed as diplontic.
(L) Meiosis in zygote results in the formation of haploid spores in haplontic life cycle.
(M) In bryophytes multicellular gametophyte is totally/partially dependent on sporophyte for anchorage and nutrition.
(N) Most algal genera are haplontic, some of them such as Ectocarpus, Polysiphonia, kelps are diplontic. Fucus, an alga is hepto diplontic.
(0) All pteridophytes show haplo-diplontic life cycle.
Choose the correct option given below :-

Strobili or cones are found in