Flagellated male gametes are present in all three of which one of the following sets?
1. Anthoceros, Funaria, and Spirogyra
2. Zygnema, Saprolegnia, and Hydrilla
3. Fucus, Marsilea, and Calotropis
4. Riccia, Dryopteris, and Cycas
Molecular basis of organ differentiation depends on the modulation in transcription by:
1. RNA polymerase
2. ribosome
3. transcription factor
4. anticodon
Increased asthmatic attacks in certain seasons are related to:
1. hot and humid environment
2. eating fruits preserved in tin containers
3. inhalation of seasonal pollen
4. low-temperature
Which of the following is a slime mould?
1. Rhizopus
2. Physarum
3. Thiobacillus
4. Anabaena
Which one of the following is an example of a negative feedback loop in humans?
1. | Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold |
2. | Secretion of tears after falling of sand particles into the eye |
3. | Salivation of the mouth at the sight of delicious food |
4. | secretion of sweat glands and constriction of the skin blood vessels when it is too hot |
Ergot of rye is caused by a species of:
1. Phytophthora
2. Uncinula
3. Ustilago
4. Claviceps
Geometric representation of age structure is a characteristic of:
1. Biotic community
2. Population
3. Landscape
4. Ecosystem
Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically?
1. White blood cells
2. Unsatiated muscle cells
3. Liver cells
4. Red blood cells
Feeling the tremors of an earthquake, a scared resident of the seventh floor of a multi-storey building starts climbing down the stairs rapidly. Which hormone initiated this act?
1. Thyroxine
2. Adrenaline
3. Glucagon
4. Gastrin
Among the human ancestors the brain size was more than 1000 CC in:
1. Homo neaderthalensis
2. Homo erectus
3. Ramapithecus
4. Homo habilis