Which scenario represent a scientific investigation a. a measurement of growth patterns of crystals space b. a selection favorite songs in a survey c. a questionnaire on the quality of care in the hospital d. survey on the best opinions for reducing air pollution

The correct answer is A. A measurement of growth patterns of crystals space

Explanation:

A scientific investigation is a type of investigation that uses the scientific method (observation, question, creating a hypothesis, testing, analyzing information, share results) to formulate explanation about the world or a certain phenomenon. Because of this, the scientific investigation is mainly used to study phenomena of the natural world or any other phenomenon that can be testable and that is based on facts and reality rather than on perception or opinions. Considering this, the scenario that represents a scientific investigation is "A measurement of growth patterns of crystals space" because this focuses on a phenomenon of reality that can be testable, while others just focus on opinion or personal perspectives that cannot be tested.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: