Free Ecosystem (Daily Quiz: 13) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Mass of living matter at a trophic level in an area at any time is called

(a) humus

(b) detritus

(c) standing crop

(d) standing state

Question-2

What is a keystone species ?

(a) A common species that has plenty of biomass, yet has a fairly low impact on the community's organization

(b) 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

(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

Question-3

Food chain consists of

(a) herbivores

(b) plants

(c) carnivores

(d) All of these

Question-4

Succession in a 6 metre deep pond exhibits a sequence of

(a) Floating Plants → Submerged Plants → Reeds → Herbs → Shrubs → Trees

(b) Submerged Plants → Reeds → Herbs → Floating → Plants → Shrubs → Trees

(c) Shrubs → Trees → Submerged Plants → Floating Plants → Reeds → Herbs

(d) Submerged Plants → Floating Plants → Reeds → Herbs → Shrubs → Trees

Question-5

Which one of the following is a primary consumer in maize field ecosystem?

(a) Grasshopper

(b) Lion

(c) Wolf

(d) Phytoplankton