how do organisms reproduce ? — Science STD 10 — Question

Name the ancestor of the following: Broccoli, Kohlrabi, Kale

What can be said about the curvature of the eye lens if it becomes thin?

How do germ cells make a single set of genes from the normal two copies in all other cells of body?

Which treatment do you suggest to a patient whose both kidneys have stopped functioning?

The electron of which shell is removed when sodium cation is formed from sodium atom?

What are called. Biodegradable substances?

What does an electric circuit mean?

Amit is a domestic help (or maid) working at Mr Dave's house. One day Amit complained to Mr Dave that he had difficulty in reading the letter which he had received from his parents. Mr Dave, realising that Amit had an eye defect, took him to an eye specialist doctor. The doctor tested his eyes carefully and told Amit to wear spectacles containing certain type of lenses having specified power. Mr Dave bought the required spectacles for Amit. By wearing this spectacle, Amit could read and write easily. He was very happy and thanked Mr Dave.
(1) What could be the eye defect Amit was suffering from?
(2) What could be the two possible reasons responsible for his eye defect? What type of lenses do you think the doctor recommended for Amit's spectacles ?
(3) What values are displayed by Mr Dave in this episode?