microsporogenesis

The stamen is attached to the thalamus with its which end?

• distal end

• proximal end

• lateral end

• ventral end

___________ separates the theca in a bilobed anther

• vertical groove

• longitudinal groove

• horizontal groove

• Transverse groove

____________ develop into pollensacs

• MIcrosporangia

• microsporophyll

• microgametocyte

• microspores

the correct sequence of wall layers in a typical anther is

• endothecium, epidermis, middle layer, tapetum

• Epidermis , Middle layer, Endothecium, Tapetum

• Epidermis, Endothecium, middle layers, Tapetum

• Endothecium, Tapetum, Middle layer, Epidermis

The cells of this layer are having more than one nucleus and dense cytoplasm

• Endothecium

• Tapetum

• Middle layer

• Epidermis

cells of sporogenous tissue under go which division to form microspore tetrad

• mitosis

• meiosis

• amitosis

• cleavage

size of pollen is approx _________ micrometers in diameter

• 25-30

• 25-50

• 25-100

• 25-45

The outermost layer of pollengrain is made up of a resistant substance called

• sporogenous tissue

• calcium pectate

• sporopollenin

• pollinium

The points where sporopollenin is absent in exine is called

• tube pores

• germ pores

• germ cells

• tube cells

intine is the inner wall of pollen grain and is made up of

• cellulose and pectin

• Calcium and pectin

• Hemicellulose and cellulose

• Hemicellulose and pectin