A high density of elephant population in an area can result in
Mutualism
Intraspecific competition
Interspecific competition
Interspecific competition
B.
Intraspecific competition
Intraspecific competition is an important density dependent factor regulating populations. Intraspecific competition occur between the members of same population.
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.
Praying mentis is a good example of
Mullerian mimicry
Warning colouration
Social insects
Social insects
C.
Social insects
Praying mantis (Mantis religiosa) is a large social insect. It has small triangular head, a long prothorax and abdomen consisting of 10 segments. The wings are well developed and the pincer-like forelegs are modified for grasping prey. It usually inhabits plantation areas. It destroys certain harmful insects so it is useful.
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
A.
a normal distribution
For a normal distribution the, mean, median and mode are actually equivalent.
Niche overlap indicates
active cooperation between two species
two different parasites on the same host
sharing of one or more resources between the two species
sharing of one or more resources between the two species
B.
two different parasites on the same host
Niche overlap is a measure of the association of two or more species. This indicate their similar habitat requirement and may also indicate competition if trophic niche/spatial niche is same and food/space is limiting eg., two different parasites on the same host.