Why are archaebacteria called extremophiles?

What are Archaebacteria?

Why are dark reactions also called thermochemical reactions?

Why are metals called electropositive elements ?

Give the scientific reasons: Poriferans are called sedentary animals. OR Why are Poriferans called sedentary animals?

Write short note on Why are green plants called producers?

Give examples of archaebacteria and eubacteria.

Why are Platyhelminthes called flatworms?

Why are kidneys called 'retroperitoneal'?

Why are earthworm called the friends of the farmers ?

Why are alkane called paraffins ?