Read the following statements about 'Terror of Bengal' and select the correct ones.
(i) 'Terror of Bengal' is the name given to water hyacinth (Eichhornia), an algae.
(ii) Eichhornia was introduced in India due to its aesthetic value.
(iii) Eichhornia drains oxygen from the water which leads to death of fishes.

Assertion: Eichhornia crassipes was introduced in India because of its beautiful flowers and shape of leaves. Reason: Water hyacinth drains oxygen from the water, which leads to death of the fishes.

Study the following statements and select the correct ones . (i) Methanogens are archaebacteria which fixes atmsopheric nitrogen (ii) Nostic is a filamentous blue green alga which fixes atmospheric nitrogen. (iii) Mycoplasma lack cell wall and can surive without oxygen.

Read the following statements and select the correct option. Statement (i)Pure water has the highest water potential, i.e. zero. Statement (ii)Process of diffusion does not require any input of energy. Statement (iii)Water moves from the system containing water at higher water potential to the one having lower water potential.

Which of the following statements are correct about the plant known as ' Terror of Bengal '? I. It has been a native of India since hundreds of years . II. It is commonly called water hyacinth and have mauve flowers. III. Its scientific name is Eicchornia crassipes . IV. It causes disturbance in ecosystem dynamics of water body in a short span of time.

Which of the following statements are correct about the plant known as ' Terror of Bengal '? I. It has been a native of India since hundreds of years . II. It is commonly called water hyacinth and have mauve flowers. III. Its scientific name is Eicchornia crassipes . IV. It causes disturbance in ecosystem dynamics of water body in a short span of time.

Read the following statements and select the correct ones. (i) A given species may occupy more than one trophic level in the same ecosystem at the same time. (ii) Productivity of an aquatic ecosystem is less than that of a terrestrial ecosystem. (iii) Producers constitute the first trophic level of a detritus food chain. A) i and ii B) ii and iii C) i and iii D) i, ii and iii

Read the following statements and select the correct ones. (i) A given species may occupy more than one trophic level in the same ecosystem at the same time. (ii) Productivity of an aquatic ecosystem is less than that of a terrestrial ecosystem. (iii) Producers constitute the first trophic level of a detritus food chain. A) i and ii B) ii and iii C) i and iii D) i, ii and iii

Read the following statements and select the correct ones. (i) A given species may occupy more than one trophic level in the same ecosystem at the same time. (ii) Productivity of an aquatic ecosystem is less than that of a terrestrial ecosystem. (iii) Producers constitute the first trophic level of a detritus food chain. A) i and ii B) ii and iii C) i and iii D) i, ii and iii

Read the following statements and select the correct option. Pure water has the highest water potential, i.e. zero. Process of diffusion does not require any input of energy. Water moves from the system containing water at higher water potential to the one having lower water potential.