Questions Related to zoology
Insufficient production of ______ in the tadpoles leads to the incomplete development.
The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. Thus insufficient production of thyroxine in the tadpoles leads to the incomplete development.
The number of pairs of cranial nerves arising from the brain of frog is?
Tadpoles growing in ___________ water shows retarded growth.
The process of growth and development is regulated by thyroxine hormone which is produced by thyroid gland. Iodine is required for thyroxine production. That is why retarded growth is seen in tadpoles living in iodine deficient water.
For the metamorphosis of tadpoles which of the following element must be available in water?
In an insect or an amphibian, the process of transformation from an immature form to an adult form in two or more distinct stages is known as metamorphosis. For the metamorphosis of tadpoles, thyroid hormone along with the essential constituent iodine is necessary.
Contraction of sternohyal muscles during breathing in frog ____________.
Throat is lowered and raised alternatively by sternohyal and petrohyal muscles.
Which of the following statement is true with reference to
teeth in frog
The lower jaw of frog is toothless. Teeth are present on premaxillae , maxillae of upper jaw.
One of the examples of the action of the autonomous neural system is ____________.
Autonomous neural system controls and coordinates the involuntary activities of various organs. It regulates involuntary activities of the body i.e., activities that are not under the will power of the animal, e.g. swallowing of food, pupillary reflex, peristalsis of the intestine, etc.
Sympathetic neural system induces ________________.
The hindbrain in frog consists of the 'cerebellum' and 'medulla oblongata'. So, the correct answer is 'Both (a) and (b)'.
Jacobson's organ is?