Daphnia Project

Question 1

Daphnia magna

Answer 1

• small crustaceans called water fleas
• serve as a food source for fish and other organisms

Question 2

Significance of Daphnia magna

Answer 2

• useful model to study toxicology, since they are sensitive to water chemistry changes; cheap and easy to raise in a lab
• used in variety of tests, such as drug testing and water quality

Question 3

Describe scientific literature

Answer 3

• similar format in five sections Introduction, methods, results, discussion, and citation)
• peer reviewed: others familiar with the topic have read the paper and offered suggestions for improvement, verified methods used

Question 4

Two types of papers

Answer 4

Primary research: articles that contain original data and are written with five sections of importance

Review papers: articles that contain overviews of many papers on a particular topic/field

Question 5

What was the hypothesis of the Daphnia magna lab?

Answer 5

Overall, the study anticipates that the mortality rate of Daphnia Magna will increase as the amount of Lysol disinfectant cleaner they are exposed to is increased.

Question 6

What were the dependent variables of the Daphnia magna lab?

Answer 6

The heartrate(BPM) and mortality rate

Question 7

What were the independent variables of the Daphnia magna lab?

Answer 7

the milliliters of Lysol disinfectant

Question 8

What control and treatment groups were included in the Daphnia Magna lab?

Answer 8

there was one control group of zero milliliters of disinfectant and 2 treatment groups of 1 and 10 milliliters of disinfectant

Question 9

How was data collected in the Daphnia magna lab?

Answer 9

Data was collected by a table; it labeled the individual daphnia magna along with recorded heartrates and mortality

Question 10

What equipment was used in the Daphnia lab?

Answer 10

An impression well, droppers, microscope, paper towels, and a waste beaker

Question 11

What is the experimental timeline for the Daphnia magna lab?

Answer 11

The time spanned over three hours; a daphnia was transferred to a slide, given transfer time of 2 minutes, viewed, applied Lysol disinfectant, given adjustment time of 2 minutes, and recorded for heartrate every 10 minutes 4 times; mortality was recorded and another daphnia was used to repeat experiment until time was up