Why is a control group important in a scientific experiment? ANSWER ASAP AND GET BRAINLIEST A. It provides a comparison to the test group.
B. It gives the scientist control over WHICH variables to change.
C. It is the group experiencing the changing variables.
D. It gives the scientist control over WHEN to change variables.

B. It gives the scientist control over WHICH variables to change.

Explanation:

This is the correct one!

preservation because he preserves part of the land and preserves means save

explanation:

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.