Answer:
The foaming in the elephant toothpaste demonstration means that a gas is produced. Production of a gas is a clue that a chemical reaction has occurred. The water vapor in the genie-in-a-bottle demonstration also shows the production of a gas.
Answer:
An experiment imposes treatment on the subjects, but an observational study does not
Explanation:
Observational studies are research studies in which an effect, process behaviour etc. are observed, without any change. For example, observation of the possible effect of a treatment on subjects.
On the other hand, experimental studies are studies in which the treatment is included. Experimental studies are randomized, meaning that subjects that are in experiment are randomly put to a treated group or a control group.
The adrenal glands respond to stress by secreting Epinephrine, and Norepinephrine. Epinephrine causes the blood vessels to narrow, and it also opens up airways in the lungs. Norepinephrine increases the heart rate and blood pressure, and it also causes the energy stores to release glucose.
Answer:
the nucleus is divided into two nuclei
Explanation:
Based on this data, you may safely conclude that THE SUPPLEMENT MAY CONTAIN CARBOHYDRATES AND LIPIDS AND ONE OTHER FOOD GROUP BASED ON THE ELEMENT THAT IS PRESENT.
Carbohydrates and lipids are food macro molecules whose building elements are carbon, hydrogen and oxygen. Thus, the presence of these elements in the food supplement means that the food macro molecules are probably present.<span />
