Home
Class 12
BIOLOGY
The graph below shows the relationships ...

The graph below shows the relationships of per capita population growth rate (r), fecundity (b) and age at first reproduction `(alpha)` in an animal speies

What is the most important conclusion to be drawn from the graph ?

A

The population growth rate decreases as first reproduction in postponed to a later stage, regardless of fecundity

B

At any `alpha`, the higher the fecundity the higher is the population growth rate achieved

C

As the age at first reproduction is postponed further, the benefits of increasing fecundity on the population growth rate become progressively negligible

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Fecundity is the reproductive output, usually of an individual or number of offspring produced or the capacity of reproduction . In the given curve, the population growth rate decreases as first reproduction is postponed to a later stage regardless of fecundity.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS ENGLISH|Exercise EXEMPLAR|13 Videos

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS ENGLISH|Exercise ASSERTION-REASON|15 Videos

  • REPRODUCTIVE HEALTH

    NCERT FINGERTIPS ENGLISH|Exercise Reproductive Health|133 Videos

  • REPRODUCTION IN ORGANISM

    NCERT FINGERTIPS ENGLISH|Exercise All Questions|137 Videos

  • SEXUAL REPRODUCTION IN FLOWERING PLANTS

    NCERT FINGERTIPS ENGLISH|Exercise Sexual Reproduction In Flowering Plants|145 Videos

Similar Questions

Explore conceptually related problems

U.r graph of a particle performing SHM is as shown in figure. What conclusion cannot be drawn from the graph?

The diagram in Fig. 11.8 below shows the change of phases of a substance on a temperature-time graph on heating the substances at a constant rate. (a) What do the parts AB, BC, CD and DE represent? (b) What is the melting point of the substance ? (c) What is the boiling point of the substance ?

Knowledge Check

  • In laboratory experiments, two species of the protist Paramecium (species 1 and 2) were grown alond and in the presence of the other species. The following graphs show growth of species 1 and species 2, both alone and when in mixed culture with the other species. Which of the following conclusions can be drawn from the graphs ?

    A
    Competitive exclusion occurred in these experiments.
    B
    Both species are affected by interspecific competition but species 1 is affected less.
    C
    Both species are affected by interspecific competition but species 2 is affected less.
    D
    Both species are affected equally by interspecific competition.

  • The relationship between population density (N_(t)) and population growth rate (R = N_(t+1) l N_(t)) in a certain animal species is shown below. Choose from the following graphs the appropriate populations growth patterns that would be obtained if the population is at the densities (I, II, III) shown in the graph above. [Note : THe y-axis in A to D is relative density that cannot be compared to the absolute density in the figure]

    A
    `I-A, II - B, III -C`
    B
    `I-D, II-C, III-B`
    C
    `I-B, II-C, III-D`
    D
    `I-C, II-A, III-B`

  • The given graph shows how much nitrate (NO_(3)^(-)) is exported from the continent towards the ocean by 16 major rivers in the world rivers in the world compared to the density of human populations living along those drainage basins (i.e., along these rivers). What interpretation can be drawn from this graph ?

    A
    Nitrate exported through rivers from heavily populated cities can cause eutrophication and toxic algal bloom in marine coastal regions.
    B
    Small drainage basins export more `NO_(3)^(-)`.
    C
    Drainage basins with higher populstion densities export lesser `NO_(3)^(-)`.
    D
    both (a) and (c )

    • Similar Questions

    Explore conceptually related problems

    Electrical resistance of certain materials, known as superconductors, changes abruptly from a nonzero value of zero as their temperature is lowered below a critical temperature T_(C) (0) . An interesting property of super conductors is that their critical temperature becomes smaller than T_(C) (0) if they are placed in a magnetic field, i.e., the critical temperature T_(C) (B) is a function of the magnetic field strength B. The dependence of T_(C) (B) on B is shown in the figure. . In the graphs below, the resistance R of a superconductor is shown as a function of its temperature T for two different magnetic fields B_1 (solid line) and B_2 (dashed line). If B_2 is larget than B_1 which of the following graphs shows the correct variation of R with T in these fields?

    the graph above represents the reaction rate,r, at which an unfinished iron nail rists in water during the first 10 days of an experiment, where d gives time measured in days. What was the total amount of rust produced from d=2 to d=6?

    To determine the effect of intra-specific competition on the growth of saplings of Eucalyptus dives, an experiment was designed in which two sets of pots were used. In the first set only 1 sapling was planted per pot. To check for the effect of intra-specific competition on allocation to each set. the results have been graphically indicated below. Which of the following conclusions can be best drawn from the study ?

    The graph above shows the percent of school-age children in the United States who received immunization for various illnesses beetween 1996 and 2012. What was the average rate of increase in the percent of children immunized per year over the given time period ?

    Adriana used the data from a scatterplot she found on the U.S. Census Bureau's website to determine a regression model showing the relationship between the population in the area where she lived and the number of years, x, after she was born. The result was an exponential growth equation of the form y = x _(0)(1+r ) ^(x). Which of the following does x _(0) most likely represent in the equation ?

    Home
    Profile