Questions

Secondary succession means in an ecosystem renewal of itself after all or a portion has been destroyed.

After a forest fire, the whole forest had destroyed but after that again renewal of that forest is also an example of secondary succession.

Venus has a very high surface temperature of 500o Cand the pressure is 90 times that on the earth.

Amazon Rainforest Forests are located in South America.

Cobalt therapy or cobalt-60 therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer.

Cobalt 60 is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. It is produced artificially in nuclear reactors.

Answer :  Y

Explanation:    Start on the left hand of the diagram, and move clockwise. Letters are written in alphabetical order, in steps of 10 letters at a time.

Wide-mouth frog is the simplest known key distribution center (KDC) authentication protocol

Nuclear power energy source generates radioactive waste.