Science questions for competitive exams

Similarity in DNA and RNA -
A. Both are polymers of nucleotides
B. Both have similar pyrimidine
C. Both have similar sugar
D. Both are genetic material

And. A. Both are polymers of nucleotides

Aquatic fern is used to increase the yield in paddy crop-
A. Azolla
B. Salvinia
C. Marsilea
D. Isoetes

Ans. A. Azolla

Lemur edri-edri is found in -
A. Madagascar
B. Mauritius
C. India
D. Sri Lanka

Ans. A. Madagascar

Who is directly related to man-
A. Gorilla
B. Rhesus
C. Gibbon
D. Orangutan

Ans. A. Gorilla


Life span of atomic hydrogen is :
A. Fraction of one sec.
B. One year
C. One hour
D. One year

Ans. A. Fraction of one sec.

Which pair is correct -
A. Sweat - temperature regulation
B. Saliva - sense of food taste
C. Sebum - sexual attraction
D. Humerus - Hind leg

Ans.  A. Sweat - temperature regulation

Which statement is true about WBC?
A. Non nucleated
B. In deficiency cancer is caused
C. Manufactured in thymus
D. Can squeeze through blood capillaries

Ans. D. Can squeeze through blood capillaries

Which is not a vestigial organ in a man-
A. Third molar
B. Nails
C. Segmental muscles of abdomen
D. Coccyx

Ans. B. Nails

Homo sapiens was evolved in-
A. Paleocene
B. Pleistocene
C. Oligocene
D. Myocene

Ans. B. Pleistocene

Characters which is closely related to human evolution
A. Disappearance of tail
B. Reduction in size of jaws
C. Binocular vision
D. Flat nails

Ans. B. Reduction in size of jaws