watch video and 2 paragraph essay http://www. hhmi. org/biointeractive/making-fittest-n atural-selection-humans with question of How does Sickle Cell Anemia protect the infected person from Malaria? What genotype provides this protection? What is the significance of the association between Malaria and Sickle Cell Anemia?

How had the study of mitosis affected scientists knowledge of cancer

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 !

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi