Jackie read that Aloe vera promote healing of burned tissue. She decided to investigate the effect of varying amounts of Aloe ve
ra on the regeneration of planaria (a freshwater flatworm), regeneration is the process of growing back a lost body part. Jackie bisected (cut in half) five planaria to obtain 10 parts (5 heads and 5 tails) for each experimental team. She applied concentrations of 0%, 10%, 20%, 30%, and 40% Aloe vera to the teams. Fifteen milliliters of Aloe vera solutions were applied. All planaria were maintained in a growth chamber with identical food, temperature, and humidity. On Day 15, Jackie measured the amount of regeneration of the planaria parts and categorized regeneration as full, partial or none.1. What is the hypothesis (if/then statement) for this particular experiment?2. What are the dependent variable and the independent variable?3. What controls are they using in their experimental setup?4. When they performed the experiment, they collected the data shown below:Percent Aloe Vera Count of Regenerated Planaria0% 210% 520% 730% 35. Should the hypothesis be supported or rejected based on the experiment? Why?
Paleontology in the real world isn't as careless and usually in movies they mis-label things. Paleontology isn't as simple as it seems and in many movies they portray little effort or processing and handling of the fossils. It requires much attention and you have to take care of the bones. Jurassic Park is a great example of fake paleontology and comparing it to real paleontology can surprise you.
Errors can occur when the chromosomes segregate into the gametes during meiosis resulting in egg or sperm with too many or too few chromosomes. As a result, fertilised eggs and the ensuing embryos may have trisomy (an extra chromosome of a particular pair) in each cell or monosomy (one chromosome fewer in each cell).
