Embibe Experts Solutions for Chapter: UPSC CDS (II) Previous Year Paper 2021, Exercise 3: General Knowledge

What is the approximate percentage of carbonn in Earth's crust?

In pea, a pure tall plant (TT) is crossed with a short plant (tt). What will be the ratio of pure tall plants to short plants in the F2 generation ?

Which one of the following statements about variations is not true?

While studying vegetation of an area, terms like ‘population’ and ‘community’ are often used. Which one of the following statements best describes a population?

In the human body, blood flows through a process of double circulation. Which one of the following statements is true in this regard ?

In which of the following groups of organisms, food material is broken down outside the body and absorbed? 

A sound wave has a frequency of $4$ kHz and a wavelength of $30$ cm. How long will it take to travel $2.4$ km?

An electric bulb is connected to a $110$ V generator. The current is $0.2$ A. What is the power of the bulb?