Which of the following methods involves counting the number of organisms in a specific area?
a.

mark/recapture
b.

direct observation
c.

sampling
d.

indirect observation

The answer is C. The method which involves counting the number of organism in a specific area is sampling. It is one common method to estimate the population of certain organisms used by biologists. In a given range, the number of plot is determined and per plot the number of individuals is multiplied to the number of plots then this results to an approximate population size.

Answer C

Explanation:The Correct Answer is C

Solid metals are appeared shiny as metals have plenty of free electrons.

Option: D

Explanation:

The surface of solid metals appear shiny, this is because elements consists of small atoms which has electrons, neutrons and protons in metals the electrons are distant from the nucleus hence, metals appear shiny.

When a bunch of metal atoms come together in a group, these outer electrons move side to side with small rapid movements. Light bounces or reflects these electrons and makes it look shiny.