MCQ
Alexander von Humboldt described for the first time
  • A
    laws of limiting factor
  • species area relationships
  • C
    population growth equation
  • D
    ecological biodiversity.

Answer

Correct option: B.
species area relationships
b
(b) : Alexander von Humboldt described species area relationship for the first time. He observed that within a region, species richness increases with increasing explored area, but only upto a limit.

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

Read the following five statements $(A$ to $E)$ and select the option with all correct statements.

$A.$ Mosses and lichens are the first organisms to colonise a bare rock.

$B.$ Selaginella is a homosporous pteridophyte.

$C.$ Coralloid roots in Cycas have $VAM$.

$D.$ Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.

$E.$ In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.

It provides medium for enzymatic activities needed for growth.
Devices for self-pollination are
Maize grain is
Which of the following statements are correct for Griffith experiments ?
(i) Frederick Griffith did experiments with Streptococcus pneumoniae.
(ii) Mice infected with the S strain die from pneumonia infection but mice infected with the R strain do not develop pneumonia.
(iii) Heat-killed S strain bacteria injected into mice did not kill them.
(iv) Mixture of heat-killed S and live R bacteria injected into mice then the mice died, and living S bacteria recovered from the dead mice.
(v) Some transforming principle' called genetic material transferred from the heat-killed S strain to R strain bacteria and enabled the R strain to become virulent.
(vi) The biochemical nature of genetic material was not defined from this experiments.
Which of the following is correct sequence in Kreb's cycle
$PEP$case and $RuBisCO$ in $C_4$ plants are present respectively in
The smallest living cells with cell wall are
The genetic defect-adenosine deaminase $(ADA)$ deficiency may be cured permanently by
The type of pollination which brings genetically different pollen grains to the stigma is