STD 12 - 11. organisms and populations — NEET STD 11 Science — Question

Which of the following plant group is considered as first terrestrial plants to possess vascular tissues xylem and phloem?

Aristotle is associated with

Which one of the following shows isogamy with non-­flagellated gametes?

Choose the wrong statement for phycomycetes.
(i) Members of phycomycetes are found in aquatic habitats and on decaying wood in moist and damp places or as obligate parasites on plants.
(ii) The mycelium is aseptate and coenocytic.
(iii) Asexual reproduction takes place by motile or by non-motile spores.
(iv) Asexual spores are exogenously produced in Sporangium
(v) A zygospore is formed by fusion of two isogamous or anisogamous or oogamous gametes.

Cytokinesis in plants takes place by the formation of

Which pair of structures are usually found in both plant and animal cells

They do not possess eukaryotic cell

Which of the following are true for polysaccharides ?
(i) It is acid insoluble.
(ii) Polysaccharides are long chains of sugars (monosaccharides).
(iii) Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide.
(iv) Starch is a polymeric polysaccharide present as a store house of energy in plant tissues.
(v) Cellulose is a heteropolymer and not a homopolymer.
(vi) Animals and plants have polymeric polysaccharide called glycogen.

Moss peat s used as a packing material for sending flowers and live plants to distant places because