Biology : Structural Organisation In Animals

The peculiar pungent smell of cockroach is produced by the secretions of :

• pheromones

• flame cells

• abdominal glands

• cervical glands

In a vertebrate which germ layer forms the skeleton muscles ?

• Ectoderm

• Endoderm

• Mesoderm

• Both 'a' and 'c'

Excretion in cockroach takes place by

• nephridium

• parotid gland

• coxal glands

• malpighian tubules

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).

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