The arrangement of the nuclei in a normal embryo sac in the dicot plant is :
(1) 2+4+2
(2) 3+2+3
(3) 2+3+3
(4) 3+3+2
In angiosperms, microsporogenesis and megasporogenesis
(1) occur in anther
(2) form gametes without further divisions
(3) involve meiosis
(4) occur in ovule
Flowers are unisexual in
(1) pea
(2) cucumber
(3) china rose
(4) onion
Coconut water from a tender coconut is
1. Immature embryo
2. Free nuclear endosperm
3. Innermost layers of the seed coat
4. degenerated nucellus
Which of of the following fruits is parthenocarpic?
1. Brinjal
2. Apple
3. Jackfruit
4. Banana
Male gametophyte in angiosperms produces
1. two sperms and a vegetative cell
2. single sperm and a vegetative cell
3. single sperm and two vegetative cells
4. three sperms
Perisperm differs from endosperm in
1. being a haploid tissue
2. having no reserve food
3. being a diploid tissue
4. 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
Which of these is a diploid structure ?
(1) Pollen grains
(2) Egg
(3) Megaspore
(4) MMC
False fruit in an apple is formed from
(1) receptacle
(2) thalamus
(3) peduncle
(4) petals.