Earth’s ozone layer filters harmful ultraviolet radiation from the sun.
Explanation:
when glucose concentration is high the pancreas secretes more insulin while if the glucose level falls the pancreas secretes glucagon to raise them
Answer:
E) there are at least two groups, one of which does not receive the experimental treatment.
Explanation:
A controlled experiment is an experiment that is manipulated by the scientist to suits his methods. They are conducted to test a single variable at a time. It helps to minimize the random effect of wild environment on the experiment.
In a controlled experiment there are two groups; one group receive treatment in certain proportion it is referred to as controlled group while the other group are exposed to the standard environment known as experimental group.
Answer:
yes!
Explanation:
hi, the atomic number of an element is usually right above the element symbol on the periodic table, and represents the amount of protons in the atom.
