How does pruning help in making the hedge dense?
It induces the differentiation of new shoots from the rootstock
It frees axillary buds from apical dominance
The apical shoot grows faster after pruning
The apical shoot grows faster after pruning
B.
It frees axillary buds from apical dominance
Pruning helps in making the hedge dense as it frees the axillary buds from apical dominance. In fact, the apicies of the plant axis (e.g. Shoot apex) has the highest concentration of auxin which suppresses the axillary buds while promotes the growth of apical bud. When the shoot apex is cut down through pruning, the axillary buds grow and the hedge becomes dense.
Which one of the following pairs is wrongly matched?
methanogens - gobar gas
yeast - ethanol
streptomycetes - antibiotic
streptomycetes - antibiotic
In pea plants, yellow seeds are dominant to green. If a heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green seeded plants would you expect in F1 generation?
50:50
9:1
1:3
1:3
Adaptive radiation refers to
adaptations due to geographical isolation
evolution of different species from a common ancestor
migration of members of a species to different geographical areas
migration of members of a species to different geographical areas
If the mean and the median pertaining to a certain character of a population are of the same value, which of the following is most likely to occur
a normal distribution
a bi-modal distribution
a T-shaped curve
a T-shaped curve
When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed
divergent evolution
microevolution
co-evolution
co-evolution
A high density of elephant population in an area can result in
Mutualism
Intraspecific competition
Interspecific competition
Interspecific competition
Golden rice is a promising transgenic crop. When released for cultivation, it will help in
alleviation of vitamin A deficiency
pest resistance
herbicide tolerance
herbicide tolerance
Parthenocarpic tomato fruits can be produced by
Removing androecium of flowers before pollen grains are released
Treating the plants with low concentrations of gibberellic acid and auxins
Raising the plants from vernalized seeds
Raising the plants from vernalized seeds
The 'blue baby' syndrome results from
excess of chloride
methaemoglobin
excess of dissolved oxygen
excess of dissolved oxygen
