Fertilization in earthworm is
cross fertilization
combined fertilization
self-fertilization
All of the above
A.
cross fertilization
Earthworms are hermaphroditic i.e., functional reproductive organs of both sexes occur in the same individual. The eggs of one individual, however, are fertilized by the sperm of another individual, i.e. cross fertilization. During mating two earthworms are bound together by a sticky mucus while each transfers sperm to the other.
Muscular movements of alimentarey canal are known as
peristalsis
diastole
systole
muscles contraction
In motor neuron the impulse following in which direction?
In two direction
In one drection
In all direction
None of the above
First heart sound is produced during closure of
auriculo-ventricular valves
eustachian valve
sinus valve
seminular valves
