Which one of the following statements is not true?
(a) Pollen grains are rich in nutrients and they are used in the form of tablets and syrups
(b) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people
(c) The flowers pollinated by flies and beetles secrete foul odour to attract them
(d) Honey is made by bees by digesting pollen collected from flowers
Perisperm differs from endosperm in
(a) being a haploid tissue
(b) having no reserve food
(c) being a diploid tissue
(d) its formation by fusion of secondary nucleus with several sperms
Pollen grains are shed at which stage?
(1) 2 celled
(2) 3 celled
(3) Usually at 2-celled, but sometimes 3-celled
(4) Single celled stage
Sporophyte formation from gametophyte is called
Which of these is a diploid structure ?
(1) Pollen grains
False fruit in an apple is formed from
Cross pollination in true genetic sense is
Seed of castor is
(1) non-endospermic, exalbuminous
(2) endospermic albuminous
(3) endospermic exalbuminous
(4) non-endospermic albuminous.
Ubisch bodies are secreted from
(3) both of these
(4) none of these
Aleurone layer is