The mbuna cichlids of lake malawi are a model for adaptive radiation. currently, there are over 400 species, all derived from one common ancestral species. the graph shows the current count of species scientists have discovered in the lake. this diversification most likely took place because a) water temperatures varied with location. b) mutation happened at a very high rate in the lake ecosystem. c) different fish lineages evolved to take advantage of different foods. d) different fish groups were isolated by barriers within the lake from other groups.

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Diego conducted an experiment to find out what kind of ball bounces the highest when dropped from a five-foot platform. he used a golf ball, a tennis ball, and a soccer ball. he dropped each ball from the balcony once. diego recorded his observations after each drop. what can diego do to best improve the reliability of his results? a) drop each ball from the platform three more times b) record his observations in more than one unit c) write at least two scientific questions after the experiment is complete d) share his results with other people who have done similar experiments you for the !

List five ways we are indebted to phytoplankton