Researchers tested the effects of acid rain on seedlings of two different species, camphor tree (cinnamomum camphora) and chinaberry tree (melia azederach). results of the experiments are shown here. note that acid rain caused a significant reduction of growth in chinaberry trees ( ∗∗∗ means p< 0.001), but not in camphor trees. what was the approximate percentage of growth reduction observed in the chinaberry trees treated with acid rain?

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

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.