Competition of species leads to
extinction
mutation
greater number of niches are formed
symbiosis
The age of pyramid with broad base indicates
high percentage of young individuals
low percentage of young individuals
high percentage of old individuals
low percentage of old individuals
The soil with poorest water holding capacity is
clay
loam
sandy
None of these
Analogous structures are a result of
Convergent evolution
shared ancestry
stabilising selection
divergent evolution
The term 'Niche' was first used by
Frederic Clements
Grinnell
Humboldt
Eugene Odum
The soil, which is transported by wind is known as
colluvial
eolian
alluvial
glacial
Which of the following is correct for r-selected species?
Large number of progeny with small size
Large number of progeny with large size
Small number of progeny with small size
Small number of progeny with large size
Population growth curve in most animals, except humans is
S-shaped
J-shaped
J-shaped with tail
S-shaped with tail
If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
Mutualism
Amensalism
Commensalism
Parasitism
Study of environment and animal relation is
Ecosystem
Phytosociology
Biotic community
Ecology
