Non-conventional souces of energy bring more pollution.

Point and Non-pouint sources of water pollution.

Name two non-degradable pollutants.

Assertion: Some cells enter G_(0) phase leading to inactivation of cell cycle. Reason: G_(0) phase occurs due to non-availability of mitogen and energy rich compounds.

Study the following statements and select the incorrect ones. (i) Pyramids of energy and yearly biomass production can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted, since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprohytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.

Conventional vasectomy and Non-scalpel vasectomy

In flowering plants, both male and female gametes are non-motile. The method to bring them together for fertillisation is

Explain how microbes are useful in pollution control and also in production of alternative source of energy.