2. When a piece of charcoal burns, it
a. neither absorbs nor releases energy.
b. loses matter and energy.
c. absorbs energy.
d. releases energy.

Which best summarizes the finding of avery? a. some traits are recessive. b. humans reproduce sexually. c. dna is a transforming factor. d. traits cannot be inherited.

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?