Cat's leg, dolphin, s flipper, bat's wing these similarites provides evidence for which of the following hypotheses? a. legs and wings may have evolved from flippers. b. all mammals have evolved from ancestor that was a bat. c. a cats leg, a dolphin's flipper, and a bat's wing have identical functions. d. cats, dolphins, and bats may have had the same ancestor millions of years ago.

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

What was the land like over 500 million years ago? what was under the sea?