Annual migration does not occur in the case of
salmon
siberian crane
salamander
salamander
C.
salamander
Salamonder is semiterrestrial lizard-like tailed amphibian lives under stones, logs and inside crevices. They show hibernation.
Salmon anadromous i.e., they spend their adult lives at sea but return to fresh water to spawn. The pacific species is legendary after migrating downstream as a smolt a sockeye salmon ranges many hundreds of miles over the pacific for nearly four year and than returns to spawn in the head waters of its parent stream.
Migration tern travels about 1100 miles during winter and return back during summer.
A high density of elephant population in an area can result in
Mutualism
Intraspecific competition
Interspecific competition
Interspecific competition
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
Praying mentis is a good example of
Mullerian mimicry
Warning colouration
Social insects
Social insects
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
Asymptote in a logistic growth curve is obtained when
The value of 'r' approaches zero
K = N
K > N
K > N
Alexander Von Humbolt described for the first time
Ecological Biodiversity
Laws of limiting factor
Species area relationships
Species area relationships
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.
