Frog's heart when taken out of the body continues to beat for some time
Select the best option from the following statements
(a) Frog is a poikilotherm
(b) Frog does not have any coronary circulation
(c) Heart is 'myogenic' in nature
(d) Heart is autoexcitable

• Only (c)

• Only (d)

• (a) & (b)

• (a) & (b)

102.

In case of poriferans the spongocoel is lined with flagellated cells called :

• Ostia

• Oscula

• Choanocytes

• Choanocytes

Which among these is the correct combination of aquatic mammals?

• Seals, Dolphins, Sharks

• Dolphins, Seals, Trygon

• Whales, Dolphins, Seals

• Whales, Dolphins, Seals

An important characteristic that Hemichordates share with Chordates is

• Absence of notochord

• Ventral tubular nerve cord

• Pharynx with gill slits

• Pharynx with gill slits

Which one of these animals is not a homeotherm?

• Macropus

• Chelone

• Psittacula

• Camelus

Which of the following features is used to identify a male cockroach from a female cockroach?

• Presence of a boat-shaped sternum on the 9th abdominal segment

• Presence of caudal styles

• Presence of anal cerci

• Forewings with darker tegmina

Which of the following animals does not undergo metamorphosis?

• Earthworm

• Tunicate

• Starfish

• Moth

Torsion of visceral mass is seen in animals belonging to the class

• Cephalopoda

• Scaphopoda

• Amphineura

• Gastropoda

Match the following columns.

Column I		Column II
A.	Pinocytosis	1.	Euglena Gracillis
B.	Hotozoic	2.	Paramecium
C.	Parasitic	3.	Amoeba Proteus
D.	Mixotrophic	4.	Monocystis

• A	B	C	D
  3	2	4	1

• A	B	C	D
  2	3	4	1

• A	B	C	D
  4	3	1	2

• A	B	C	D
  1	4	2	3

Organ of Jacobson helps in

• Touch

• Vision

• Smell

• Hearing