In flowering plants, the generative cell divides mitotically to give rise to two male gametes. Where does this division occur?
Microspore mother cell
Pollen grain
Pollen tube
Ovule
Related Questions
In oviparous individuals development of zygote takes place
Outside the body
Inside the body
Inside the freshwater
Inside the marine water
Emasculation is concerned with
Hybridization
Clonal selection
Mass selection
Pure line selection
In a species with a 2n=16 karyotype, how many chromosomes would be present in the nucleus of the functional megaspore?
8
16
32
4
Certain mutations can disrupt the formation of the acrosome in mammalian sperm. Which of the following would be the MOST direct consequence of such a mutation?
Inability to penetrate the zona pellucida
Reduced sperm motility
Failure of the sperm to undergo capacitation
Premature release of acrosomal enzymes
Which of the following plants typically flowers only once in its lifetime?
Mango
Bamboo
Rose
Sunflower
Monoecious plants are?
Cucurbits
coconut
Papaya
both 1 and 2
Which of the following events is NOT associated with the process of spermatogenesis?
Formation of a polar body
Differentiation of spermatids into spermatozoa
Meiotic divisions
Release of spermatozoa into the seminiferous tubules
Select the mismatch:
Rh factor
Erythroblastosis fetalis
Coombs' test
Turner's syndrome
Events in the sexual reproduction
I. Pre-fertilisation
II. Fertilisation
III. Post-fertilisation
The sequential order of their occurrence is
I→III→II
II→I→III
III→II→I
I→II→III
In which of the following organisms self fertilisation is seen?
Fishes
Leech
Earthworm
Liverfluke
