Four different phylogenetic trees of a group of salamanders have been proposed. trees a and b each require 12 homoplasies, but tree a requires 14 synapomorphies and tree b requires 13 synapomorphies. tree c requires 15 homoplasies and 13 synapomorphies. finally, tree d requires 10 homoplasies and 15 synapomorphies. according to the principle of parsimony, which tree(s) is/are the most accurate? a) tree a only b) tree b only c) tree c only d) tree d only e) both tree a and tree b

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes “if” a certain set of circumstances are present “then” there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forceschoose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.

Explain how light energy is turned into chemical energy? ! due tomorrow!

Which feature would you expect to find in a population in which sexual selection depends on male competition?