In vitro fertilization is a technique that involves the transfer of which one of the following into the Fallopian tube?
1. Embryo only, upto 8 cell stage
2. Either zygote or early embryo up to 8 cell stage
3. Embryo of 32 cell stage
4. Zygote only
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
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