This Venn diagram is being used to compare the characteristics of nonvascular and vascular plants. Which characteristic is shared by the two plants, and can therefore be placed in the overlapping section?

have roots
perform photosynthesis
have xylem and phloem
produce seeds

Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth

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

Explain why phospholipid molecules form a bilayer. (3 marks)