C. Number of bones 3. 27
in frogs skeleton
D. Number of bones 4. 153
in forelimb of frog
(a) A - 2, B - 3, C - 4, D - 1
(b) A - 1, B - 3, C - 4, D - 2
(c) A - 3, B - 1, C - 4, D - 2
(d) A - 4, B - 3, C - 1, D - 2
- Zoochlorellae or zooxanthellae of coloured Hydra
occur in
(a) Mesoglea (b) Nutritive cells
(c) Interstitial cells (d) Epithelio-muscular
cells - Which one is not found in testis of frog?
(a) Germinal cell (b) Seminiferous tubule
(c) Sertoli cell (d) Interstitial cell - Choose the correct statement with reference to
mutation theory.
I. Mutations occur from time to time in naturally
breeding population
II. Mutations are continuous and accumulate
over generations
III. Mutations are full fledged and there are no
intermediate forms
IV. Mutations are not subjected to natural
selection
(a) II and III (b) I and III
(c) III and IV (d) I and II - Select the correct route for the passage of sperms
in male frogs:
(a) Testes →Vasa efferentia →Kidney → Seminal
Vesicle → Urinogenital duct → Cloaca
(b) Testes →Vasa efferentia →Bidder ’s canal →
Ureter → Cloaca
(c) Testes →Vasa efferentia →Kidney →Bidder’s
canal → Urinogenital duct → Cloaca
(d) Testes → Bidder’s canal → Kidney → Vasa
efferentia → Urinogenital duct → Cloaca - Muscle contraction of shortest duration occurs in
(a) Eye lids (b) Heart
(c) Intestine (d) Jaw - Which of the following excretory organ is
correctly matched with the organism in which it
is found?
(a) Flame cells – Platyhelminthes
(b) Antennal gland or green glands – Insects
(c) Nephridia – Crustaceans
(d) Malpighian tubules – Annelids - Joints between humerus and radio-ulna is
(a) Ball and socket (b) Pivot
(c) Gliding (d) Hinge- The reflex arc which is made of two neurons is
known as
(a) polysynaptic reflex arc
(b) asynaptic reflex arc
(c) monosynaptic reflex arc
(d) disynaptic reflex arc - Read the following four (A-D) statements :
(i) Natural selection is a process in which
heritable variations enabling better survival are
enabled to reproduce greater number of progeny.
(ii) When migration of a section of population to
another place and population occurs, gene
frequencies change.
(iii) If loss of gene migration happens multiple
times there would be a gene flow.
(iv) If loss of considerable gene from a small
population occurs by chance it is called as
genetic drift.
How many of the above statements are true?
(a) Two (b) One
(c) Four (d) Three - Parts A, B, C, and D of the human eye are shown
in the diagram. Select the option which gives
correct identification along with its functions/
characteristics.
(a) C- Aqueous chamber-Reflects the light which
does not pass through the lens
(b) D- Choroid- its anterior part forms ciliary
body
(c) A- Retina- Contains photoreceptors i.e.,
rods and cones
(d) B-Blind spot- Has only a few rods and cones- Which of the following pairs of hormones are the
examples of those that can easily pass through
the cell membrane of the target cell and bind to a
receptor inside it (mostly in the nucleus)?
(a) Insulin and glucagon
(b) Thyroxin and insulin