15497.Which one of the following is considered important in the development of seed habit?
Heterospory
Dependent sporophyte
Free-living gametophyte
Haplontic life cycle
15498.From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have:
Tracheae, sieve cells and sieve tubes
Tracheids, tracheae and sieve tubes
Tracheae and sieve tubes
Tracheids, tracheae and sieve cells
15499.Roots of which plant contain a red pigment which has affinity for oxygen?
Carrot
Soybean
Mustard
Radish
15503.A fruit developed from hypanthodium inflorescence is called
Caryopsis
Hesperidium
Sorosis
Syconus
15504.A group of flowering plants whose seed typically has two embryonic leaves or cotyledons is called
Dicotyledons
Monocotyledons
Magnolianae
None of these
15506.Cotyledons and testa respectively are edible parts in
Cashew nut and litchi
Groundnut and pomegranate
Walnut and tamarind
French bean and coconut
15508.Fleshy adventitious roots are found in
Potato and onion
Radish and carrot
Dahlia and sweet potato
Turnip and rice
15511.In an inflorescence, two types of small, sessile flowers were observed. They are arranged in centripetal manner and have reduced hair like sepals. Which pair of the following characters are NOT associated with such flowers?
I. Nectar glands at the base of the corolla.
II. Axile placentation.
III. Superior ovary.
IV. Scaly bracts.
The correct pair is:
II, III
III, IV
I, II
I, IV