Answer: a stain with no other chemicals or detergents added to it should be the control group
Explanation: A control group is defined as as an experiment or study that does NOT relieve any treatment by the researchers so the stain would not have any treatment added to it
I can’t answer 7 because I can’t read the writing on the papers in the image. But for 8, it is important to classify living things because it makes it easier to study and understand the behaviors, lives, and the evolutionary progression of millions of life forms
Answer:
d. all of these
Explanation:
Over the past century, many researchers have questioned whether nonhuman primates could communicate with each other and whether they could communicate with each other. After much research and testing with different nonhuman primates, it was concluded that primates not only communicate, but this communication is done through various processes and has a similar pace to the rate of communication between humans, after all, if genetic differences between humans and chimpanzees are very small.
Among the processes of communication between non-human primates we can mention: vocalization, facial expressions and displays, which ensure that these animals talk to each other.
