Question

42. Which group of organisms is believed to be among the earliest to evolve on earth
a) Arthropods b) Coelenterates - c) Protozoans d) Reptiles​

Answer 1

Answer:

arthopods and reptiles

Answer 2

Answer:

Explanation:

Arthropods was introduced in $1848$

Coelenterates was introduced in $1888$

Protozoans was introduced in $1818$

First ever reptile was introduced in $1768$

Therefore,

Reptiles is believed to be among the earliest to evolve on earth.

Hence, option $(d)$ is correct.