About 10% because I know about 90-95% of DNA is junk DNA(doesnt perform serious function)
Answer:
Option A, Key stone
Explanation:
A keystone species plays a major role in an ecosystem as it is the species whose presence effects all other species in the ecosystem .In general a keystone species is always a dominant predator that feed on prey population. If it is removed, the prey population will explode and the population diversity will reduce. For example - bison, prairie dog etc.
Hence, option A is correct
Answer: B. Rough strained and heat killed smooth strain kills mouse
Explanation:
