MCQ
Ecological pyramids are of
  • A
    Two types
  • Three types
  • C
    Four types
  • D
    Five types

Answer

Correct option: B.
Three types
b
(b)Three types i.e., pyramid of number, pyramid of biomass and pyramid of energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Allen's rule applies to
Specific property attributed to gibberellins is
$A$ : Gibberellic acid increases the yield of malt from barley grain.
$R$ : Gibberellins stimulate the synthesis of amylase, protease and other hydrolytic enzymes for mobilisation of reserve food.
How many $\text{ATP}$ and $\ce{NADPH _2}$ are required for the synthesis of one molecule of Glucose during Calvin cycle$?$
Choose correct pair :
Fill in the blanks.
(i) The cambium is generally more active on the A side than on the B.
(ii) In the C season, cambium is very active and produces a large number of xylarly elements having vessels with wider cavities.
(iii) The D wood is lighter in colour and has a lower density.
(iv) The two kinds of woods that appear as alternate concentric rings, constitute an E.
(v) In old trees, the greater part of F xylem is dark brown due to deposition of organic compounds like tannins, resins, oils, gums.
(vi) In old trees, the region comprising dead elements with highly lignified walls and is called G wood.
(vii) The peripheral region of the secondary xylem is lighter in colour and is known as the H wood.
(viii) The I is impervious to water due to suberin deposition on the cell wall.
(ix) J phellem, and K are collectively known as periderm.
(x) L is a non-technical term that refers to all tissues exterior to the vascular cambium. When it is formed early in the season, it is called M or N bark.
(xi) In the dicot root, the vascular cambium is completely O in origin.
(xii) The ground tissue system forms the main bulk of the plant. It is divided into three zones- P, pericycle and Q.
(xiii) The wood is actually a secondary R.
In glycolysis, the end product is
$A :$ Scientific names for plants have been standarized through $ICBN.$
$R :$ Naming system which uses three word format was given by Linnaeus.
In the given figure, which component has thin outer walls and highly thickened inner walls?
$I.$ Population evolve to maximise their reproductive fitness, also called Darwinian reproductive fitness (higher $r$ value), in the habitat in which they live

$II.$ The population growth rate $r$ is inversely related to generation time

$III.$ The housefly, which has a short life span and produces a large number of eggs, could be considered as a ' $K$ ' selected species

$IV.$ Under a particular set of selection pressures, organisms evolve towards the most efficient reproductive strategies

$V.$ Life history traits of organisms have evolved in relation to the constraints imposed by biotic and abiotic factors in their habitat Select the combination of correct statements