BS Bachelor of Science: Life, Physical, and Chemical 5

Question 1

Which scientist proposed the theory of natural selection as a mechanism for evolution?

Accepted Answer

Charles Darwin

Answer

Charles Darwin published 'On the Origin of Species' in 1859, proposing natural selection as the driving mechanism of evolution.

Question 2

Which gas law describes the inverse relationship between the pressure and volume of a gas at constant temperature?

Accepted Answer

Boyle's law

Answer

Boyle's law states that pressure and volume are inversely proportional at constant temperature (PV = constant).

Question 3

Which type of ecological relationship benefits one organism while the other is neither harmed nor helped?

Accepted Answer

Commensalism

Answer

Commensalism benefits one species while the other is unaffected, such as barnacles living on whale skin.

Question 4

In the electromagnetic spectrum, which type of radiation is used in MRI (magnetic resonance imaging) machines?

Accepted Answer

Radio waves

Answer

MRI machines use radio waves combined with strong magnetic fields to produce detailed images of internal body structures.

Question 5

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

The coulomb (C) is the SI unit of electric charge, equal to the charge transferred by one ampere in one second.

BS - Bachelor of Science Practice Test