The ganglia of sympathetic and the central nervous system in frog develops from the

• neural cell

• neural plate cells

• notochordal cells

• neural crest cells

Non-cellular layer that connects inner surface of the epithelial tissue to the connective tissue is

• basement membrane

• epidermis

• dermis

• either (b) or (c).

123.

A frog has its brain crushed. But when pinched on the leg, The leg draws away. It is an example of

• neurotransmitter incluced response

• simple reflex

• conditioned reflex

• automated motor response

Tadpoles can be made to grow in size and become adult by

• injecting thyroxine hormone

• feeding the eggs of other frogs

• injecting gonadotrophic hormones

• providing them with suitable climatic conditions

Which of the following scientists discovered the triple helical structure of collagen?

• G.N. Ramachandran

• Anton von Leeuwenhoek

• Matthias Schleiden

• Theodor Schwann

• Theodor Schwann

Which one of the following is not a sensory structure in cockroach?

• Antennae

• Eyes

• Anal cerci

• Maxillary palps

• Maxillary palps

Choose the wrongly matched pair regarding the position of
reproductive structures in earthworm

• Testes - 10^th and 11^th segments

• Spermathecae - 6^th to 9^th segments

• Male genital pore - 9^th segment

• Ovaries - Inter segmental septum of 12^th and 13^th segments

• Ovaries - Inter segmental septum of 12^th and 13^th segments

In cockroach, the arthrodial membrane

• forms the hind wings

• covers the compound eyes

• forms the hypopharynx

• forms the tegmina

• forms the tegmina

Choose the wrong statement regarding the circulatory system of frog

• Sinus venosus receives blood through major veins called vena cava

• The ventricle opens into a sac like conus arteriosus

• The erythrocytes are nucleated

• Special venous connection between liver and intestine called renal portal system is present

• Special venous connection between liver and intestine called renal portal system is present

Read the following statements and choose the correct answer.

i. Gap junctions cement adjacent cells together

ii. Areolar tissue contains fibroblasts, macrophages and mast cells

iii. Tight junctions facilitate the cells to communicate with each other

iv. Adhering junctions help to stop substances from leaking across tissues

v. Cells of connective tissue except blood secrete fibres of structural proteins called elastin

• i, ii and iii only are wrong

• i, iii and iv only are wrong

• iii and v only are wrong

• i, ii and v only are wrong

• i, ii and v only are wrong