The group in an experiment that all the conditions stay the same is the control group.
My guess would be the first one , Hope it’s the correct answer !
Answer:
6.7 to 7.0
Explanation:
In the digestive systems of humans and many other mammals, an alpha-amylase called ptyalin is produced by the salivary glands, whereas pancreatic amylase is secreted by the pancreas into the small intestine. The optimum pH of alpha-amylase is 6.7–7.0.
Oxygen, look at chemical reaction on the pic
Answer: C
Explanation:
Tthe nervous system is a highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body.
