Question

can you put this in your own words?

Our class was divided into three groups and everyone followed the same procedure and steps. Each group had to keep track of their daphnia’s rate of growth based on how many lives and reproduce and how many die. To start off with this experiment, we had to come up a group name and then filled the “Daphnia life history data sheet” on which we recorded all our group member’s phone numbers and the date each person was responsible for collecting the information. We had total of seven 50 ml of plastic tube and we had them all labeled with our group name and the density of Daphnia. The tubes were labeled as follows: two tubes -1 D. magna per 2.0 ml of water, one tube – 1 D. magna per 1.0 ml of water and one tube of 1 D. magna per 0.5 ml of water. After that, we filled all of the tubes with 6 to 8 ml of well water that was in a big container. Throughout this whole experiment we used well water whenever we had to add water to the tubes. Then, our instructor provided us with three-day old Daphnia and after that we added Daphnia to the assigned tubes which are as followed: we added 5 Daphnia to tube labeled 1 D. magna per 2.0 ml of water and tube labeled 1 D. magna 1.0 ml of water received 5 daphnia each. Then these three-day old daphnia were obtained by placing egg in well water and collecting all the offspring that appeared during the next 24 hours. Then, we separated the adults form the babies and transfer the number of baby daphnia from their nursey to tube with a clean plastic dropper. We had to be really carefully when making the transfer so we don’t injure the daphnia. be careful to ensure that the tip of the dropper in submerged in the water before releasing the daphnia into your tubes. air bubbles can get trapped under the daphnia's carapace if you allow them to be exposed to the air. the, adjust the volume of water in each tube to 10 ml by adding or removing sufficient water with a dropper.

Answer 1

After dividing the class into three groups, each student was asked to follow the same strategy. The objective was to record their daphina's rate of development on the basis of how many are able to survive and multiply and how many die. The experiment began with deciding a group name and filling details of each group member's phone numbers and date each individual was dependable for collecting the data on a sheet entitled "Daphnia life history data sheet". We had to label the given seven 50 ml of plastic tube with our group name and the density of Daphnia.

Two tubes were labeled as - 1 D. magna per 2.0 ml of water, one tube was labeled as 1 D. magna per 1.0 ml of water, and lastly one tube with 1 D. magna per 0.5 ml of water. This was followed by adding 6 to 8 ml of water in each tube from a big container. Only well water was added to the tubes whenever required. Then we were provided three-days old Daphnia by our instructor which was added to the assigned tubes.

5 Daphnias were added to the tube labeled 1 D. magna per 2.0 ml of water and also to the tubes labeled 1 D. magna per 1.0 ml of water.

To obtained these three-day old Daphnia, egg was placed in well water and all the offsprings were collected that showed up amid the next 24 hours. Then we isolated the grown-ups from the babies and exchanged the number of infant daphnia from their nursey to tube with a clean plastic dropper. We had to be truly carefully when making the exchange so we don’t harm the daphnia. Before releasing the daphnia into our tubes, we had to be sure that the dropper's tip is submerged in the water as daphnia's carapase can become entrapped with air bubbles if exposed to the air. Volume in wach tube was adjusted to 10 ml by adding or removing adequate water with the help of a dropper.

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P.S. The class was given 7 tubes but according to this data, a total of 4 tubes were labeled.