The troops (soldiers) equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on landing ?

Why do we call as plants producers on land?

A paratrooper id dropped from an airplane. After some time his parachute opens and he reaches the ground with almost zero speed. This speed of fall (v) versus time (t) grapg will look like :

The given diagram is an outline of human body showing the posttion of certain organs. In this diagram (I) Name the parts labelled 1-5. (ii) Name the hormone released from 1 that influences the working of part 2. (iil) How do part labelled as 3 differs from parts labelled as 1 and 2 in general? Name the endocrine cells present in part 3. (iv) What will happen if the part labelled as 4 is removed ? (11) Name the hormones released by part 5. (VI) Why the part labelled as 1 called master gland? Which part of the forebrain controls the gland labelled 1 ? (vii) Name the gland that secretes 'emergency hormone.

The countries which do not have oil reservoirs in their land import oil from other countries. But sometimes during transporting oil through sea routes, accidental oil spilling occurs. This oil spilled in the ocean may prove fatal and toxic to aquatic animals. Therefore, removel of this spilled oil is essential for protection of aquatic life. For removing this oil layer, certain microbes like Pseudomonas spp. and Alcanivarax borkumensis are used. These microbes have the ability to destroy the pyridines and other toxic chemicals. The hydrocarbonoclastic bacteria (HCB) are able to decompose the hydrocarbons and bring about the reaction carbon with oxygen resulting in formation of C O 2 and water. Like oil spills cause damage to aquatic life. plastic forms the major part of the garbage on land. Plastics are difficult to degrade as they are made up of PET. By research, various species like Vibrio and Idenoella sakaiensis which can degrade PET have been identified. There are certain species of microbes which can decompose rubber from garbage. Based on the given paragraph answer the following question.Why should there be a ban on plastic bags ?