Which one of the following correctly describes the location of some body parts in the earthworm Pheretima?
Two pairs of accessory glands in 16-18 segments
Four pairs of spermathecae in 4-7 segments
One pair of ovaries attached at intersegmental septum of 14th and 15th segments
One pair of ovaries attached at intersegmental septum of 14th and 15th segments
B.
Four pairs of spermathecae in 4-7 segments
In earth, two pairs of testes are found in 10th and 11th segments, accessory four glands in 17th and 19th segments, four pairs of spermatheca from 6th 9th segment and one pair of ovarises in 13th segment.
Foetal ejection reflex in human female is induced by
the pressure exerted by the amniotic fluid
the release of oxytocin from pituitary
fully developed foetus and placenta
fully developed foetus and placenta
Which of the following plant species would you select for the production of bioethanol?
Brassica
Zea mays
Pongamia
Pongamia
Sickle cell anaemia is
an autosomal-linked dominant trait
caused by substitution of valine by glutamic acid in the β-globin chain of haemoglobin
caused by a change in a base pair of DNA
caused by a change in a base pair of DNA
Tiger is not a resident, in which one of the following national park?
Ranthambhor
Sunderbans
Gir
Gir
In the case of peppered moth (Biston betularia), the black-coloured form became dominant over the light-coloured form in England during the industrial revolution. This is an example of
natural selection whereby the darker forms were selected
the appearance of the darker coloured individuals due to very poor sunlight
protective mimicry
protective mimicry
There is no DNA in
an enucleated ovum
mature RBCs
a mature spermatozoan
a mature spermatozoan
When breast feeding is replaced by nutritive food in proteins and calories; the infants below the age of one year are likely to suffer from
marasmus
rickets
kwashiorkor
kwashiorkor
A health disorder that results from the deficiency of thyroxin in adults and characterised by
(i) a low metabolic rate
(ii) increase in body weight
(iii) tendency to retain water in tissue is
hypthyroidism
simple goitre
myxoedema
myxoedema
