Why did mendel use pure lines in his experiment? a. pure lines grew faster. b. he needed a control group. c. he had no other plants to use. d. pure lines produce more offspring.

Isotopes of the same element have differ in their

Preventive health behaviors rarely have much influence on health as most diseases are genetic. a. true b. false

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a). it must be open to modification if new evidence doesn't completely support it. b). it must be based on scientific observations that can be repeated in a controlled setting. c). it must be applicable to future events and occurrences. d). it must be consistent with only a small portion of relevant observations or data.