Q. No.Tadpoles will undergo metamorphosis if they are:
(1) fed on frog eggs
(2) provided with high temperature
(3) injected thyroxine
(4) injected gonadotropic hormones
The pituitary gland is crushed and injected in a frog. The frog will:
(1) start laying eggs almost immediately
(2) change color
(3) undergo metamorphosis
(4) die
Cuboidal epithelium with brush border of microvilli is found in :
1. Ducts of salivary glands
2. Proximal convoluted tubule of nephron
3. Eustachian tube
4. Lining of intestine
Goblet cells of alimentary canal are modified from:
| 1. | Columnar epithelial cells | 2. | Chondrocytes |
| 3. | Compound epithelial cells | 4. | Squamous epithelial cells |
If the head of the cockroach is removed, it may live for a few days because:
| 1. | The cockroach does not have a nervous system |
| 2. | The head holds a small proportion of the nervous system while the rest is situated along the ventral part of its body |
| 3. | The head holds 1/3rd of the nervous system while the rest is situated along the dorsal part of its body |
| 4. | The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen |
Buccopharyngeal respiration in frog
1. is increased when nostrils are closed
2. Stops when there is pulmonary respiration
3. is increased when it is catching fly
4. stops when mouth is opened.
Frog's heart when taken out of the body continues to beat for sometime. Select the
best option from the following statements.
(i) Frog is a poikilotherm.
(ii) Frog does not have any coronary circulation.
(iii) Heart is "myogenic" in nature.
(iv) Heart is autoexcitable Options:
1. Only(iv)
2. (i) and (ii)
3. (iii)and(iv)
4. Only (iii)
The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the
| 1. | presence of a modified tongue that acts like a sponge to suck water from damp soils. |
| 2. | presence of water channels in the skin by which they absorb water from their surroundings. |
| 3. | presence of ciliated esophagus that helps in separating water from ingested particulate matter. |
| 4. | selective feeding on plants with a large amount of water that would fulfill the water requirement. |
Bidder’s canals is/are present in
1. Male frog
2. Both male and female frog
3. Female cockroach
4. Bone of mammals
Which of the following is not seen in the brain of the frog?
(1) Olfactory lobes
(2) Corpus callosum
(3) Corpora striata
(4) Anterior choroid plexus
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