Sympatric speciation is: Group of answer choices common among vertebrate animals but not plants. almost never seen in nature. speciation resulting from a geographic barrier. speciation without geographic isolation. speciation resulting from human manipulation in a laboratory.

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

Did you know that a blue wales tongue weighs more than an elephant?

The largest unit within which gene flow can readily occur is a