If the head of cockroach is cut off, it will still alive for as long as one week. Give reason

Cockroach is uricotelic animal. Give reason.

The handle of a door is always found at one edge of the door which is located at a maximum possible distance away from hinges. Give reason for it.

The function P is defined as "to each person on the earth is assigned a date of birth." is this a function one-one? Give reason.

Rate of a reaction is the change in concentration of any one of the reactants or any one of the products in unit time. 2HI to H_(2)+I_(2) Whether the molecularity and the order of the above reaction are the same? Give reason.

Ammonia is a base because it has a lone pair of electrons. Predict the change in -basicity in the following cases and give reason for each. a) When one hydrogen of ammonia is replaced by methyl group. b) When one hydrogen of ammonia is replaced by phenyl group.

Consider the following functions. f:ZrarrZ defined by f(x)=3x+7 and g:RrarrR defind by g(x)=2x-3 . Of the above two functions one is a bijective function and the other is not.Give reason.