What did Mendel’s cross-pollination of pea plants prove? 1.All the cells in an organism carry the same hereditary factors.
2.Inheritance of certain factors is dependent upon the genetic code
3.Certain factors are dominant, and other factors are recessive.
4.Crossing a tall plant with a tall plant will always result in a tall plant.

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

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

The mammal pictured below is a silvery mole rat. which statement is an inference based on the picture? the animal is ugly. the animal has hairless feet with sharp claws. the animal has prominent upper and lower incisor teeth. the animal likely has poor vision since its eyes are so small.