Question

What is true about keystone species ?
(a) A species which makes up only a small
proportion of the total biomass of a
community, yet has a huge impact on the
community’s organization and survival
(b) A common species that has plenty of
biomass, yet has a fairly low impact on the
community’s organization
(c) A rare species that has minimal impact on
the biomass and on other species in the
community
(d) A dominant species that constitutes a large
proportion of the biomass and which affects
many other species

Answer 1

Answer:

(d) A dominant species that constitutes a large

proportion of the biomass and which affects

many other species

Answer 2

Keystone species are-

(d) A dominant species that constitutes a large

proportion of the biomass and which affects

many other species

Keystone species are the part of ecosystem which have great impact in regulation of population.

It also plays important role in determining amount of species to be present in an ecosystem.

The species can be on land as well as water.

These species are also responsible for increasing the biodiversity.

Example of marine keystone species are - sea otters protect from sea urchins.

Example of land keystone species are- gray wolf.