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
Tadpoles will undergo metamorphosis if they are:
(1) fed on frog eggs
(2) provided with high temperature
(3) injected thyroxine
(4) injected gonadotropic hormones
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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