Question 1

One of the following is known as oil sardine.

Accepted Answer

Sardinella longiceps is commonly known as the oil sardine. They belong to the genus Sardinella. This is one of the commercial fishes due to its high value in market in India. The body is elongated. They have a swollen type of belly. They have rays present on their pelvic fin and thus, they are from the group of ray-finned fishes. They have large number of gill rakers. They are heavy sources of oil and fatty acids. Thus, the correct answer is option C.

Question 2

$Tachyglossus$ is a connecting link between

Accepted Answer

The three genera of monotremes, the duck-billed platypus (Ornithorhynchus) and the echidnas or spiny anteaters (Tachyglossus and Zaglossus) are the most primitive modern mammals. They share certain characteristics of both birds and reptiles which are not seen in other mammals. In particular, the reproductive system consisting of cloaca is similar to the reproductive system in reptiles, ability to lay eggs etc make them more close to reptiles. However, they are hairy endotherms which suckle their young and have a single bony element in the lower jaw making them mammals. Thus, they are considered to be a connecting link between reptiles and mammals. Thus, the correct option is D.

Question 3

Diapsid skull is found in the which of the following organism?

Accepted Answer

Diapsids are a group of amniote tetrapods that have developed two arches in each side of their skull. The diapsids are extremely diverse group of animals and comprises of crocodiles, lizards, snakes, tuatara (Sphenodon), birds and nonavian dinosaurs.Thus, the correct answer is option C.

Question 4

Presence of claspers is an important character in

Accepted Answer

A clasper is a structure found in some groups of male animals. Claspers are formed from the posterior portion of the pelvic fin. It serves as an intromittent organ and transfers semen into the female's cloaca during mating. Sphyrna is a hammerhead shark (a cartilaginous fish) and possesses claspers.Thus, the correct answer is option A.

Question 5

The reptile which lacks penis belongs to

Accepted Answer

Rhynchocephalia is the order that contains two living species and commonly called as tuatara. Externally they look like lizards but internally they are very different. Tuataras have many unique morphological characteristics, such as their feeding apparatus, a cold-adapted physiology, and a particular skull structure. Tuatara males also lack an intromittent penis, and mating is achieved by cloacal apposition. Thus, the correct answer is option D.

Question 6

A stumpy, laterally compressed tail is a characteristic of

Accepted Answer

All sea snakes have paddle-like tails and many have laterally compressed bodies that give them an eel-like appearance. They are venomous snake and live in marine environment.Thus, the correct answer is option B.

Question 7

When the tail is cylindrical and control scales do not extend the entire width of belly, the snake is

Accepted Answer

If the tail of a snake is flat, laterally compressed, it is sea snake and is poisonous. If the tail ends bluntly, it is non-poisonous. If the tail is round cylindrically and pointed, it may be poisonous or non-poisonous.If the tail is round and not compressed, then examine the ventrals. If the ventrals are small and narrow, it is a non-poisonous snake. In some non-poisonous snakes (like Python), the ventrals are fairly broad but do not extend completely across the belly, Thus, the correct answer is option A.

Question 8

Choose the scientific name of catfish from the following.

Accepted Answer

Wallago attu is a species of catfish in the family Siluridae. It is found in large rivers and lakes of the Indian subcontinent and in parts of Southeast Asia. They have very small eyes and well developed sensory barbels which helps in good vision.On the other hand, Cirrhina malaria is mrigal while Catla catla is carp and Labeo rohita is rohu.  Thus, the correct answer is option B.

Question 9

Snake has:

Accepted Answer

A)Correct option CB) Explanation for correct option: C Absence of limbs for locomotion and the presence of immovable eyelids with a nictitating membrane fused over cornea are the characteristic features of snakes. Lizard has movable eyelids.

Question 10

Larva of Balanoglossus is:

Accepted Answer

A tornaria is the planktonic larva of some species of Hemichordata, like Balanoglossus. It is very similar in appearance to the bipinnaria larvae of starfishes, with convoluted bands of cilia running around the body. So, the correct answer is 'Tornaria'

Animal Kingdom

Biology
8767 Views

One of the following is known as oil sardine.

$T a c h y g l o s s u s$ is a connecting link between

Diapsid skull is found in the which of the following organism?

Presence of claspers is an important character in

The reptile which lacks penis belongs to

A stumpy, laterally compressed tail is a characteristic of

When the tail is cylindrical and control scales do not extend the entire width of belly, the snake is

Choose the scientific name of catfish from the following.

Snake has:

Larva of Balanoglossus is:

Animal Kingdom

Biology 8767 Views

One of the following is known as oil sardine.

Tachyglossus is a connecting link between

Diapsid skull is found in the which of the following organism?

Presence of claspers is an important character in

The reptile which lacks penis belongs to

A stumpy, laterally compressed tail is a characteristic of

When the tail is cylindrical and control scales do not extend the entire width of belly, the snake is

Choose the scientific name of catfish from the following.

Snake has:

Larva of Balanoglossus is:

Biology
8767 Views

$T a c h y g l o s s u s$ is a connecting link between