Download App

STD 12 - 11. organisms and populations — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 11. organisms and populations1 Mark
MCQ
The formula for exponential population growthis
  • ✓
    $dN/dt = rN$
  • B
    $dt/dN = rN$
  • C
    $dN/rN = dt$
  • D
    $rN/dN = dt.$
✓

Answer

Correct option: A.
$dN/dt = rN$
a
(a) : Nearly all populations will tend to grow exponentially as long as there are resources available. The formula for exponential population growth is $dN/ dt = rN$. In this equation $d$ is the rate of change, $N$ is the number of existing individuals, $r$ is the intrinsic growth rate, $t$ is time, and $dN/dt$ is the rate of change in population size.

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

Explore more

More "M.C.Q [1M]" from STD 12 - 11. organisms and populations→STD 12 - 11. organisms and populations — all question types→BIOLOGY STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

At which level do herbs and grasses reside?
→
During evolution, which plant had lost hischlorophy $ll$?
→
Assertion : Comparative biochemistry provides a strong evidence in favour of common ancestory of living beings.
Reason : Genetic code is universal.
→
In the following in each set a conservation approach and an example of method of conservation are given
($a$) In situ conservation - Biosphere Reserve
($b$) Ex situ conservation - Sacred groves
($c$) In situ conservation - Seed bank
($d$) Ex situ conservation - Cryopreservation
Select the option with correct match of approach and method
→
Passive immunity can be obtained by injecting
→
Identify the correct statements

$I$. Infertility is the inability to produce viable offsprings due to the defects in the female partner

$II$. Complete lactation helps in contraception

$III$. Spreading awareness can help to create a reproductively healthy society

→
The fluid which is rich in calcium citrate, fibrinolysin, acid phosphatase and contributes about 30% of the total volume of semen is released by:
→
Mark the correct statement
→
Which of the following is beneficial in getting rid of aphids and mosquitos?
→
When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as:
→