Question 1

The intestine of dog fish is characterized by the presence of:

Accepted Answer

In Scoliodon, the mucus lining of the intestine becomes folded anticlockwise into a longitudinal spiral or scroll of about two and a half turns. This is called the scroll valve or spiral valve. It serves to delay the passage of food and offers an increased surface for absorption like the typhlosole of an earthworm. Hence, option B is the correct answer.

Question 2

Which of the following is a true fish?

Accepted Answer

Jellyfish belongs to Phylum Coelenterata. Cuttlefish or Sepia belongs to Phylum Mollusca. Silverfish is an Arthropod. Catfish is true fish having prominent barbels without scales. Jellyfish is a free-swimming marine animal that has an umbrella-shaped body. Cuttlefish is a mollusc. Silverfish is a wingless insect. Thus, the correct answer is option A.

Question 3

Sea horse is a

Accepted Answer

Sea horse is a Hippocampus belongs that to Osteichthyes. Osteichthyes are bony fishes and have a bony endoskeleton. they have a horse like head and prehensile tail. It is the smallest species found in tropical western pacific.

Question 4

Which one of these is viviparous?

Accepted Answer

Viviparity means the development of the embryo inside the body of the mother, eventually leading to live birth, as opposed to laying eggs. Mammals are best examples of viviparity. Rabbit and whale are mammals, so they show viviparity.

Question 5

Poison teeth in snakes are called:

Accepted Answer

Fangs are long, pointed, and grooved teeth connected to the venom-producing sac in snakes. As these are connected to the venom-producing sac, these can inject poison into the enemy, when the snake bites.Thus, the correct answer is option D.

Question 6

Bats have special sensory system called

Accepted Answer

Biosonar or sonar system helps bats to detect distant objects by echolocation. They emit high-pitched sounds that bounce off objects in its path and produce an echo back. They respond rapidly to the echo and skillfully avoid obstacles and captures prey. So, the correct answer is option B.

Question 7

Sea horse is

Accepted Answer

Sea horse (Hippocampus) is a small marine fish. Head and neck suggestive of a horse, they also feature segmented bony armour, an upright posture and a curled prehensile tail. They live in water, breath through gills and have a swim bladder. Seahorses eat small crustacea such as Mysis Shrimp. It is the only animals in the whole animal kingdom in which the male bears the unborn young. So, the correct answer is option D.

Question 8

Which animal has redar system to locate the objects in the darkness?

Accepted Answer

Bats are the only mammals capable of flying. They find shelter in caves, crevices, tree cavities and buildings. They have evolved a specialized system, known as echolocation. They emit sounds that bounce off objects in their path, sending echoes back to the bats. From these echoes, the bats can determine the size of objects, how far away they are, how fast they are traveling and even their texture. Hence, option B is correct.

Question 9

Which of the following does not have a four-chambered heart?

Accepted Answer

Among vertebrates, birds and mammals possess a four-chambered heart, e.g. sparrow, cat, humans, etc.  All reptiles have a three-chambered heart with an exception of the crocodile which has a four-chambered heart. Since the cobra is a reptile, its heart is three-chambered. Therefore, the correct answer is option C.

Question 10

Heart of humans is .......... chambered.

Accepted Answer

Human beings belong to class Mammalia, they are warm blooded animals and their heart has four chambers two atrium and two ventricles, double circulation of blood takes place. Whereas fishes have two-chambered heart, amphibians and reptiles have three chambered heart. Thus, the correct answer is option D.

Animal Kingdom

Biology
11089 Views

The intestine of dog fish is characterized by the presence of:

Which of the following is a true fish?

Sea horse is a

Which one of these is viviparous?

Poison teeth in snakes are called:

Bats have special sensory system called

Sea horse is

Which animal has redar system to locate the objects in the darkness?

Which of the following does not have a four-chambered heart?

Heart of humans is .......... chambered.

Animal Kingdom

Biology 11089 Views

The intestine of dog fish is characterized by the presence of:

Which of the following is a true fish?

Sea horse is a

Which one of these is viviparous?

Poison teeth in snakes are called:

Bats have special sensory system called

Sea horse is

Which animal has redar system to locate the objects in the darkness?

Which of the following does not have a four-chambered heart?

Heart of humans is .......... chambered.

Biology
11089 Views