Each ovule has one or two protective envelop called exine and intine

Capitulum has one or more whorls of called

Consider the following statements and choose the correct option (a) Ovule is attached to the placenta by means of a stalk called filament (b) Ovule fuses with the stalk in the region called hilum (c) The two protective envelopes of the ovule are called integuments (d) The small opening in the tip of ovule is called germ pore

Select the correct statements w.r.t pollen grain (a) Its sporoderm consists of exine and intine (b) Has exine whice helps in fossilization (c) Generally spherical shaped with about 25-50 um in diameter (d0 It can be stored in liquid N2 for years (e) Its viability does not depend on temperature and humidity.

the formation of two species from one species is called

A: Orthotropous ovule has micropyle at the upper end. R: Ovule is also called megasporangium.

Read the following statements and find the suitable option :- (a) Generally petals are green, leaf like and protect the flower in the bud stage. (b) Generally sepals are brightly coloured to attract insects for pollination. (c) If stamens in a flower remain free (no cohesion) this is called polyandrous. (d) Each ovary bears one or more ovules attached to a flattened, cushion like placenta.

In gymnosperms, the nucellus is protected by envelops and the composite structure is called?

Three letters are dictated to three person and an envelope is addressed to each of them, the letters are inserted into the envelopes at random so that each envelope contains exactly one letter. Find the probability that at least one letter is in its proper envelope.

Three letters are dictated to three persons and an envelope is addressed to each of them, the letters are inserted into the envelopes at random so that each envelope contains exactly one letter. Find the probability that at least one letter is in its proper envelope.