Home
Class 11
BIOLOGY
In a grassland ecosystem, if the number ...

In a grassland ecosystem, if the number of primary producers is approximately 6 million plants, the number of top carnivores (in million), which may be supported by it, may be

A

3

B

30

C

6

D

60

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ECOSYSTEM

    AAKASH SERIES|Exercise EXERCISE-II (PLANT SUCCESSION)|26 Videos
  • ECOSYSTEM

    AAKASH SERIES|Exercise EXERCISE-II (NUTRIENT CYCLING)|14 Videos
  • ECOSYSTEM

    AAKASH SERIES|Exercise EXERCISE-II (ENERGY FLOW)|4 Videos
  • CELL CYCLE AND CELL DIVISION

    AAKASH SERIES|Exercise Exercise-III|18 Videos
  • ENVIRONMENTAL ISSUES

    AAKASH SERIES|Exercise Exercise-III (Previous AIPMT/NEET Questions)|41 Videos

Similar Questions

Explore conceptually related problems

In a hydrogen sample, if the atoms are excited to states with principal, quantum number 20, then the number of different wavelengths which may be observed in the spectrum is

If producer is a large tree that supports a number of herbivorous animals which are further attacked by ectoparasites, the pyramid of number shall be

Radioactive decay is a statisticle process i.e., we cannot precisely predict the timing of a particular radioactivity of a particular nucleus . The nucleus can disintegrate immediately or it may take infinite time . Simply the probability of the number of nuclei being disintegrated at any instant can be predicted . the rate at which a particular decay process in a radioactive sample is directly proportional to the number of radioactive nuclei present and thus obeys first order kinetics . the factor dN/N expresses the fraction of nuclei decayed in time dt. t_(1//2) is the time in which half of the atoms are decayed and average life is the time for the nucleus to survive before decay . 75 atoms of a radioactive species are decayed in 2 half lives (t_(1//2) = 1 hr ) if 100 atoms are taken initially . Number of atoms decayed if 200 atoms are taken in 2 hr are :

Radioactive decay is a statisticle process i.e., we cannot precisely predict the timing of a particular radioactivity of a particular nucleus . The nucleus can disintegrate immediately or it may take infinite time . Simply the probability of the number of nuclei being disintegrated at any instant can be predicted . the rate at which a particular decay process in a radioactive sample is directly proportional to the number of radioactive nuclei present and thus obeys first order kinetics . the factor dN/N expresses the fraction of nuclei decayed in time dt. t_(1//2) is the time in which half of the atoms are decayed and average life is the time for the nucleus to survive before decay . A freshly prepared radioactive source of half period 2 hour emits radiations on intensity which is 64 times of the permissible safe level. The minimum time after which it would be possible to work with this source is :

Radioactive decay is a statisticle process i.e., we cannot precisely predict the timing of a particular radioactivity of a particular nucleus . The nucleus can disintegrate immediately or it may take infinite time . Simply the probability of the number of nuclei being disintegrated at any instant can be predicted . the rate at which a particular decay process in a radioactive sample is directly proportional to the number of radioactive nuclei present and thus obeys first order kinetics . the factor dN/N expresses the fraction of nuclei decayed in time dt. t_(1//2) is the time in which half of the atoms are decayed and average life is the time for the nucleus to survive before decay . Which of the following relation is correct ? (t_(1//2) and t_(3//4) are time required to complete half and 3/4 decay respectively )

The equation of Schroedinger for the hydrogen atom in the time-independet, non-relativistic form is a partial differential equation involving the position coordinates (x, y and z). The potential energy term for the proton-electron system is spherically symmetric of the form -1//4pi in_(0) xx (e^(2)//r) . THus it is advantages to change over from the cartesian coordinates (x,y and z) to the spherical polar coordinates, (r, theta and phi ). In this form the equation become separable in the radial part involving r and the angular part involving theta and phi . The probability of locating the electron within a volume element d tau = 4pi r^(2)dr is then given |Psi|^(2)(4pir^(2)dr) , where Psi is a function of r, theta and phi . With proper conditions imposed on Psi , the treatment yields certain functions, Psi , known as atomic orbitals which are solutions of the equations. Each function Psi correspods to quantum number n, l and m, the principal, the azimuthal and the magnetic quantum number respectively, n has values 1, 2, 3,...., l has values 0, 1, 2, ....(n-1) for each value of n and m (n-1) for each value of n and m (m_(l)) has values =1, +(l+1),...1,0,-1,-2...-l i.e., (2l+1) values for each value of l. In addition a further quantum number called pin had to be introduced with values +-1//2 . Any set of four values for n, l , m and s characterizes a spin orbital. Pauli.s exclusion principle states that a given spin orbital can accomodate not more than electron. Further the values l = 0, l=1, l=2, l=3 are designated s,p,d and f orbitals respectively. It is a basic fact that any two electrons are indistinguishable. 3 electrons are to be accomodated in the spin orbitals included under the designated 2p, conforming to the Pauli principle. Calculate the number of ways in which this may be done.

Find the number of three digited numbers that can be formed using 7,6,8 and 9 when each digit may be used any number of times ?

A railway carriage can seat 5 each side . The number of ways a party of 4 girls and 6 boys can seat themelves so that the girls may always have the corner Q and s is

A survey was conducted by a group of students as a part of their environment awareness programme , in which they collected the follwing data regarding the number of plants in 20 houses in a locality . Find the mean number of plants per house . {:("Number of plants","Number of houses"),(0-2,1),(2-4,2),(4-6,1),(6-8,5),(8-10,6),(10-12,2),(12-14,3):}

AAKASH SERIES-ECOSYSTEM-EXERCISE-II (TROPHIC LEVELS AND FOOD CHAINS)
  1. Read the following statements and select the correct ones. (i) A gi...

    Text Solution

    |

  2. Organisms which are associated with first as well as third trophic lev...

    Text Solution

    |

  3. In a grassland ecosystem, if the number of primary producers is approx...

    Text Solution

    |

  4. In the given food web, an increase in the population of hawks will not...

    Text Solution

    |

  5. Select the option that correctly identifies A, B and C in the given ta...

    Text Solution

    |

  6. Study the following statements concerning food chains and select the c...

    Text Solution

    |

  7. Given food web contains some missing organisms, (1), (2), (3) and (4)....

    Text Solution

    |

  8. In an aquatic ecosystem, the organism present at the trophic level equ...

    Text Solution

    |

  9. Animals which occupy the same trophic level

    Text Solution

    |

  10. Food chains are met with only in the

    Text Solution

    |

  11. Where there is no difference

    Text Solution

    |

  12. Trees to Birds to Lice to Bacteria. Above food chain is

    Text Solution

    |

  13. Which of the following organisms convert plant matter into animal matt...

    Text Solution

    |

  14. What kind pyramid is represented by the given figure ?

    Text Solution

    |

  15. Which kind of the pyramid is represented by the given figure

    Text Solution

    |

  16. The given pyramid does not represents

    Text Solution

    |

  17. Read the following statements and select the correct option: (a) In...

    Text Solution

    |

  18. Which of the following acts as a primary as well a secondary consumer ...

    Text Solution

    |

  19. Study the following statements and select the incorrect one.

    Text Solution

    |

  20. Which kind of pyramid is represented by the given figure?

    Text Solution

    |