Biology Lab Portion of Midterm

What are the main lab safety rules?

Use goggles, gloves, and aprons when handling chemicals or biological materials. Know how to respond to spills, broken glass, and chemical exposure.

What is the purpose of a beaker?

A beaker is used for mixing, stirring, and heating liquids in a laboratory setting.

What is the most accurate tool for measuring volume?

A graduated cylinder is the most accurate tool for measuring liquid volume.

What are the 8 main characteristics of life?

1. Made of cells 2. Use energy 3. Grow and develop 4. Reproduce 5. Respond to stimuli 6. Maintain homeostasis 7. Have DNA 8. Evolve/adapt.

How do you read a thermometer?

Read the temperature at the level of the liquid in the thermometer, ensuring your eyes are at the same level to avoid parallax error.

What does percent error indicate?

Percent error indicates the accuracy of a measurement; a lower percent error means a more accurate measurement.

What does standard deviation show?

Standard deviation indicates how spread out the data is; a small SD means data is consistent, while a large SD means data is spread out.

What are the levels of classification in biology?

The levels of classification are: Kingdom → Phylum → Class → Order → Family → Genus → Species.

What is a cladogram?

A cladogram is a diagram that shows the evolutionary relationships among various species based on shared characteristics.

What is allele frequency?

Allele frequency refers to how often a particular allele appears in a population, and it can indicate changes in the population over time.

What is the role of yeast in fermentation?

Yeast consumes sugar and produces carbon dioxide (CO₂) during fermentation, which can cause inflation of a balloon in a lab setting.

What do stomata do?

Stomata are small openings on plant leaves that allow for gas exchange and regulate water loss.

What does floating vs sinking of leaf disks indicate?

Floating leaf disks indicate that oxygen is being produced during photosynthesis, while sinking indicates a lack of oxygen production.

What do bubbles represent in the Bubble Lab?

Bubbles represent oxygen being produced during photosynthesis; more bubbles indicate a faster rate of photosynthesis.

What is the importance of understanding lab tools?

Understanding lab tools is crucial for accurately conducting experiments and interpreting results.

How should you study for the biology lab exam?

Review old labs, worksheets, diagrams, and practice explaining concepts in your own words, rather than just memorizing.

What is the significance of balanced chemical equations?

Balanced chemical equations ensure that the same number of atoms of each element are present on both sides of the equation, which reflects the conservation of mass.

What is the effect of light on the rate of photosynthesis?

Increased light intensity generally increases the rate of photosynthesis, up to a certain point.

What is the role of carbon dioxide in photosynthesis?

Carbon dioxide is a key reactant in photosynthesis, and its availability can affect the rate of the process.

What happens to image size under higher magnification in a microscope?

Under higher magnification, the image size increases, but the brightness and field of view may decrease.