Which of the following is NOT a cause for siblings to look differently? sexual reproduction

independent assortment

crossing over

mutations

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.