A qualitative data is one that can not be measured in exact numbers but can be expressed with qualitative words. Here in option A , cloudiness is a qualitative term, it cannot be measured in numerical figures and units.
While a quantitative term is one that can be measured in exact numbers such as volume, weight, mass , height , temperature, area, etc.
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science.
<span>"A butterfly population includes both green and yellow butterflies, and a predator sees yellow more easily than it does green" would lead to evolution since the green ones would live on. </span>
DNA or protein can be used as a ''molecular clock'' that tells how long it has been since two species have diverged from a common ancestor. The fossil record is usually derived from sedimentary rocks laid down millions of years ago.
They all do Birth Rate- Increase Death Rate- Decrease Immigration- Increase Emigration- Decrease Disease- Decrease Competition- Decrease Human Activity- Increase Natural Disasters- Decrease
