AP Biology: Experimental Design

hypothesis makes a statement that suggests or advises a potential result or outcome that an investigator or researcher expects

• null hypothesis

• standard hypothesis

• alternative hypothesis

• research hypothesis

Tags

NGSS.HS-LS3-2

the hypothesis that there is no significant difference between treatments, any observed difference being due chance

• null hypothesis

• standard hypothesis

• alternative hypothesis

• research hypothesis

variable the experimenter changes or controls and is assumed to have a direct effect on another variable

• independent variable

• dependent variable

Tags

NGSS.MS-PS2-2

variable being tested and measured in an experiment

• independent variable

• dependent variable

Tags

NGSS.MS-PS2-2

Researcher tested ability of yeast to grow on media. Mutant haploid yeasts (1&2) used. What was the role of Treatment I?

• treatment, determine that yeast was viable

• control, determine that yeast was viable

• treatment, determine that mutant 1 & 2 unable to grow without amino acids

• control, determine that mutant I & 2 unable to grow without amino acids

Researcher tested ability of yeast to grow on media. Mutant haploid yeasts (1&2) used. Predict diploid yeast on each.

• No growth on any treatment media (1, 2, 3, & 4)

• Growth on treatment medias 1, 3, & 4, but no growth on 2.

• Growth on all treatment media (1, 2, 3, & 4)

• Growth on treatment medias 1, but no growth on 2, 3, or 4.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

To test experimenter's claim (mobile invertebrates transfer pollen in absence of water) - Identify negative control.

• female flower & invertebrates (no male flower)

• male flower & invertebrates (no female flower)

• male flower, female flower, and invertebrates

• male flower & female flower (no invertebrates)

Tags

NGSS.HS-LS2-6

To test experimenter's claim (mobile invertebrates transfer pollen in absence of water) - Identify experimental group.

• female flower & invertebrates (no male flower)

• male flower & invertebrates (no female flower)

• male flower, female flower, and invertebrates

• male flower & female flower (no invertebrates)

Tags

NGSS.MS-LS1-4

Identify dependent variable.

• Fertilized male flower

• Presence of invertebrates

• Fertilized female flower

• Absence of invertebrates

Tags

NGSS.HS-LS2-6

To investigate the role of genes on insecticide resistance, researchers deleted genes. Identify the control strain.

• I

• II

• III

• IV

Tags

NGSS.HS-LS4-4