How does the ozone layer depletion affect life on earth?

Mention two body features of Australopithecus.

We should not insert sharp objects into the ear to remove ear wax. Give a suitable reason.

In a school experiment, a few students grow plants in pots placed horizontally as shown below. After a few days, the students observed that the roots bent downward, and the shoots curved upward.

(a) Name the tropic movement seen in shoots.

(b) Why do roots always grow downwards?

(c) Which phytohormone regulates the above tropic movements?