*Question*
Answer the following question given this paragraph: For natural selection to take place, organisms must vary in their traits. Asexual reproduction results in offspring that are all the same. They are also identical to the parent cell. So how can prokaryotes increase genetic variation? They can exchange plasmids. This is called genetic transfer . It may happen by direct contact between cells. Or a "bridge" may form between cells. Genetic transfer mixes the genes of different cells. It creates new combinations of alleles. Q: What is the exchange of plasmids by prokaryotes called? Choices: - biochemical transfer - artificial transfer - transcription - genetic transfer A:
**Answer**
genetic transfer

*Question*
Answer the following question given this paragraph: Some people who are obese have an eating disorder. Eating disorders are mental illnesses that require treatment by health professionals. Q: Who should an obese person with an eating disorder seek for help? Choices: - psychiatrist - body builder - social worker - health professional A:
**Answer**
health professional

*Question*
Answer the following question given this paragraph: DNA encodes instructions for proteins. RNA copies the genetic code in DNA and carries it to a ribosome. There, amino acids are joined together in the correct sequence to make a protein. Q: Dna encodes instructions for what kind of molecules? Choices: - acids - cells - fats - proteins A:
**Answer**
proteins

*Question*
Answer the following question given this paragraph: After trees are cut, logging companies often move these materials down a river to a sawmill where they can be shaped into building materials or other products. The logs float on the water because they are less dense than the water they are in. Knowledge of density is important in the characterization and separation of materials. Information about density allows us to make predictions about the behavior of matter. Q: What property allows cut logs to float on water? Choices: - polarity - heat - precipitation - density A:
**Answer**
density