Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called:
1. xenogamy
2. geitonogamy
3. karyogamy
4. autogamy
The genotype of a plant showing the dominant phenotype can be determined by:
1. test cross
2. dihybrid cross
3. pedigree analysis
4. back cross
PGA as the first CO2 fixation product was discovered in photosynthesis of:
1. Bryophyte
2. Gymnosperm
3. Angiosperm
4. Algae
Study the four statements (a–d) given below and select the two correct ones out of them:
| a: | A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers |
| b: | Predator starfish Pisaster helps in maintaining species diversity of some invertebrates |
| c: | Predators ultimately lead to the extinction of prey species |
| d: | Production of chemicals such as nicotine and strychnine by plants is metabolic disorder |
The two correct statements are:
1. a and d
2. a and b
3. b and c
4. c and d
Seminal plasma in human males is rich in:
1. fructose and calcium
2. glucose and calcium
3. DNA and testosterone
4. ribose and potassium
ABO blood groups in humans are controlled by the gene I. It has three alleles – IA IB and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
1. Three
2. One
3. Four
4. Two
Breeding of crops with high levels of minerals, vitamins, and proteins is called:
| 1. | somatic hybridization |
| 2. | biofortification |
| 3. | biomagnification |
| 4. | micropropagation |
A common biocontrol agent for the control of plant diseases is:
1. Baculovirus
2. Bacillus thuringiensis
3. Glomus
4. Trichoderma
Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
1. Aldosterone
2. Both androstenedione and dehydroepiandrosterone
3. Adrenalin
4. Cortisol
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