Mycorrhizae are the example of

• Fungistasis

• Amensalism

• Antibiosis

• Antibiosis

Alexander Von Humbolt described for the first time

• Ecological Biodiversity

• Laws of limiting factor

• Species area relationships

• Species area relationships

Asymptote in a logistic growth curve is obtained when

• The value of 'r' approaches zero

• K = N

• K > N

• K > N

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

Annual migration does not occur in the case of

• salmon

• siberian crane

• salamander

• salamander

The amnion of mammalian embryo is derived from

• ectoderm and mesoderm

• endoderm and mesoderm

• ectoderm and endoderm

• mesoderm and trophoblast

In a growing population of a country,

• pre-reproductive individuals are more than the reproductive individuals

• reproductive individuals are less than the post-reproductive individuals.

• pre-reproductive individuals are less than the reproductive individuals.

• reproductive and pre-reproductive individuals are equal in number.

Praying mentis is a good example of

• Mullerian mimicry

• Warning colouration

• Social insects

• Social insects

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

A high density of elephant population in an area can result in

• Mutualism

• Intraspecific competition

• Interspecific competition

• Interspecific competition