Bank PO Questions

Photoautotrophs are those organisms that can make their own food using sun light with the help of the process of photosynthesis.

Plants can prepare their own food using sunlight. Hence they are Photoautotrophs.

Rust forms when oxygen reacts with chemicals in rocks, and that is often the case with many other elements in general. Like a copper nail being exposed to the air will rust.

A computer software are of two types. They are :

1. System software

2. Application software

Systems software includes the operating system and all the utilities that enable the computer to function. 

Application software includes programs that do real work for users.

Hence, Operating system is an example of system software.

The number of letters in the given word RITUAL = 6

Then, 

Required number of different ways can the letters of the word 'RITUAL' be arranged = 6!

=> 6 x 5 x 4 x 3 x 2 x 1 = 720

Kangaroo.

Footsteps. 

Yes, as you walk forward, you will leave the footstep behind you.

True, the greenhouse effect is caused solely by human activities such as deforrestation, depletion of natural resources and emission of CO2 by using vehicles, refrigerators and AC's.