Biology Lab Concepts and Applications

Mr. Anderson reviews the first seven AP Biology labs, focusing on inquiry-based learning. Labs include artificial selection with Fast plants, Hardy-Weinberg equilibrium using beads and spreadsheets, DNA comparison through cladograms, diffusion and osmosis experiments, photosynthesis rate measurement, respiration analysis with respirometers, and cell division studies using onion roots and sordaria.

What type of selection is demonstrated when only the tallest plants are chosen to breed in the artificial selection lab?

• Stabilizing selection

• Disruptive selection

• Balancing selection

• Directional selection

In the Hardy-Weinberg lab, what is the purpose of using beads of different colors?

• To measure the rate of natural selection

• To calculate the mutation rate

• To represent different alleles in a population

• To simulate genetic mutations

What is the main cause of changes in allele frequencies observed in the Hardy-Weinberg spreadsheet simulation?

• Mutation

• Natural selection

• Genetic drift

• Gene flow

What is the primary method used in Lab 3 to determine evolutionary relationships between organisms?

• DNA sequencing and BLAST analysis

• Behavioral studies

• Morphological analysis

• Fossil record examination

In the diffusion and osmosis lab, what happens to the phenalene cubes when placed in sodium hydroxide?

• They shrink in size

• They dissolve completely

• They turn a reddish color

• They remain unchanged

What is the significance of the color change in the dialysis bag experiment?

• It demonstrates the diffusion of iodine

• It indicates the presence of glucose

• It shows the movement of starch

• It reveals the size of the dialysis pores

In the photosynthesis lab, what causes the leaf chads to float to the top of the beaker?

• Production of oxygen bubbles

• Increase in temperature

• Release of carbon dioxide

• Absorption of water

What is the role of potassium hydroxide in the respiration lab?

• To absorb oxygen

• To solidify carbon dioxide

• To provide nutrients

• To increase temperature

In the mitosis lab, which phase do cells spend most of their time in?

• Prophase

• Interphase

• Metaphase

• Anaphase

What does the presence of crossing over in the meiosis lab indicate?

• No genetic variation

• High mutation rate

• Mixing of genetic material

• Stable gene frequency