63. a student wanted to determine if slugs preferred green leaf lettuce
leaves over purple cabbage leaves for food. pieces of both leaves
were cut. one piece of each type of leaf and one slug were placed in
each often containers. after three days, the surface area of each leaf
section was measured and the results were recorded in a data table.
state one reason that the results of this experiment might be considered
invalid.

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey