Double fertilisation was discovered by
Nawaschin
Starsburger
Emerson
None of the above
A.
Nawaschin
The two gametes released by the pollen tube move in opposite direction most probably the streaming currents of cytoplasm. One gamete fuses with egg called fertilisation and second fuses with two polar nuclei called triple fusion i.e. fertilisation and triple fusion jointly called double fertilisation. It was first observed by Nawaschin (1848) in Lilium and Fritillaria. This phenomenon is unique to angiosperm.
The species, which is going to become extinct due to lack of proper care would be called
rare
endangered
vulnerable
extinct
Abnormal growth of the tumor in cancer is due to
abnormal mitotic division
accumulation of body fluid
abnormal meiotic division
metastasis
Which one of the following can help in the diagnosis of a genetical disorder?
ELISA
ABO blood group
PCR
NMR
The children of a haemophilic man and a normal woman are
all haemophilic
only daughters are haemophilic
only sons are haemophilic
neither sons nor daughters are haemophilic
If a plant having yellow or round seeds was crossed with another plant having green and wrinkled seeds then F, progeny are in the ratio
15 : 1
1 : 15
1 : 13
all yellow and round seeds
