Tag: frog

Questions Related to frog

Hormone which induces metamorphosis in Frog is

zoology frog introduction to reproduction reproductive system in frog frog - digestive system, circulatory system, excretory system and reproductive system

  1. Ecdysone

  2. Thyroxine

  3. Juvenile hormone

  4. Melatonin

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Correct Option: A
Explanation:

In frog growth and metamorphosis are controlled by hormones synthesized by endocrine glands near the front of the body. Neurosecretory cells in an insect's brain secrete a hormone, the prothoracicotropic hormone that activates prothoracic glands, which secrete a second hormone, usually ecdysone, that induces ecdysis. PTTH also stimulates the corpora allata, a retrocerebral organ, to produce a juvenile hormone, which prevents the development of adult characteristics during ecdysis.

So the correct answer is 'Ecdysone'.

Albuminous layer around the egg of Frog is deposited by

zoology frog introduction to reproduction reproductive system in frog frog - digestive system, circulatory system, excretory system and reproductive system

  1. Ovarian follicles

  2. Ovary

  3. Oviduct

  4. Coelom

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Correct Option: C
Explanation:

The frog egg is surrounded by an albuminous layer by an oviduct which later it comes into a uterus. The oviduct is a long coiled duct with the thick wall that is not connected with kidneys.  It consists some glands which secrete albumen that hardens ova. After the ovulation, the cilia of the oviducal funnel draws the coelomic fluid with ova which moves into the middle region with the help of cilia.

So the correct answer is 'Oviduct'.

In Suriname toad, eggs are taken care by 

zoology frog introduction to reproduction reproductive system in frog frog - digestive system, circulatory system, excretory system and reproductive system

  1. Male

  2. Female

  3. Both A and B

  4. None of the above

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Correct Option: B
Explanation:
The Suriname toad is morphologically flat and show remarkable parental care. The eggs are taken care by female toad. The female released eggs which get embedded in the skin on her back by the movement of male toad.
So the correct option is 'Female'.

The part of the brain, which shows progressive increase in size, from a fish to mammals is 

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  1. Cerebrum

  2. Olfactory lobes

  3. Optic lobes

  4. Medulla oblongata

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Correct Option: A
Explanation:

As we move from fish to mammals, there is an observable increase in the brain size relative to the body size. This progressive increase is mainly observed in the form of an increase in the size of cerebral hemispheres or the cerebellum. So, the correct answer is 'Cerebrum'.