Who made the earliest attempt to classify living beings?

Say True or False: Charka was the first to make a serious attempt to classify living things.

Who first made an attempt to classify living organisms on scientific basis?

Most abundant element in living beings is:

The mother of Naresh collects the waste material of living beings in an open space. According to her, after a few days, micro-organisms break the waste material of living beings and turn it into fertilizers.What is this fertiizer called?

These questions consist of two statement each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion. B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion: Ernst Haeckel has classified living beings into three kingdoms. Reason. The three kingdoms are Protista, Plantae and Animalia.

Discuss the various characteristics of living beings.