Which one of the following structures between two adjacent cells is an effective transport pathway?
1. Plasmodesmata
2. Plastoquinones
3. Endoplasmic reticulum
4. Plasmalemma
The genetically-modified (GM) brinjal in India has been developed for:
1. insect-resistance
2. enhancing self-life
3. enhancing mineral content
4. drought-resistance
In unilocular ovary with a single ovule, the placentation is:
1. marginal
2. basal
3. free central
4. axile
An element playing important role in nitrogen fixation is:
1. molybdenum
2. copper
3. manganese
4. zinc
Sertoli cells are found in:
| 1. | ovaries and secrete progesterone |
| 2. | adrenal cortex and secrete adrenaline |
| 3. | seminiferous tubules and provide nutrition to germ cells |
| 4. | pancreas and secrete cholecystokinin |
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
| 1. | The discrete unit controlling a particular character is called a factor. |
| 2. | Out of one pair of factors, one is dominant, and the other recessive. |
| 3. | Alleles do not show any blending and both the characters recover as such in the F2 generation. |
| 4. | Factors occur in pairs. |
Apomictic embryos in Citrus arise from:
1. synergids
2. maternal sporophytic tissue in ovule
3. antipodal cells
4. diploid egg
One example of animals having a single opening to the outside that serves both as mouth as well as the anus is:
1. Octopus
2. Asterias
3. Ascidia
4. Fasciola
Select the correct statement from the ones given below:
| 1. | Barbiturates when given to criminals make them tell the truth |
| 2. | Morphine is often given to persons who have undergone surgery as a painkiller |
| 3. | Chewing tobacco lowers blood pressure and heart rate |
| 4. | Cocaine is given to patients after surgery as it stimulates recovery |
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