Tag: reproductive health

Microsporangium

Pollen sac

Female gametophyte

Pollen grains

Some reptiles have also been reported as pollinators in some plant species

Pollen grains of many species can germinate on the stigma of a flower but only one pollen tube of the same species grows into the style

Insects that consume pollen or nectar without brining about pollination are called pollen/ nectar robbers

Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of pistil

Exine of pollen grain - Sporopollenin

Tapetum - Ubisch bodies

Male gametophyte pf angiosperms - No prothalial cells

Most common type of ovule - Orthotropous

$6$

$12$

$24$

$3$

$14$

$21$

$7$

$28$

The egg

One of the synergids

The central cell

One of the antipodal cells

Integument

Nucellus

Chalaza

Micropyle

A-Central cell, G-Egg nucleus

C-Plamsa membrane, D-Vegetative nucleus

B-Egg nucleus, F-Male gametes

B-Central cell, E-Filiform apparatus

Nucellus-n, MMC-$2$n, Functional megaspore-$2$n

Nucellus-$2$n, MMC-n, Fundamental megaspore-n

Nucellus-$2$n, MMC-$2$n, Functional megaspore-n

Nucellus-n, MMC-$2$n, Functional megaspore-n

(i) and (ii) are correct but (iii) and (iv) are incorrect

(i), (ii) and (iv) are correct but (iii) is incorrect

(ii), (iii) and (iv) are correct but (i) is incorrect

(i) and (iv) are correct but (ii) and (iii) are incorrect