Answer:
Experimental groups: type of dogs
Dependent variable: hearth rate
Independent variable: the amount of caffeine
Explanation:
The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.
It is a matter of surface area to volume. The ratio of surface area to volume decreases (as it gets larger, volume increases faster than surface area). Because of this, cells can only intake so many nutrients and other things they need, meaning growth is limited.
Water would move out of the by osmosis from of high concentrations to an area of low concentration. Salt ions would undergo a net movement by diffusion from the surrounding solutions into the cell.
Answer:
As latitude increases, the temperature decreases
Answer: An element is a pure substance that can not be broken into smaller particles.
Explanation: An element may comprises of two or more atoms that are chemically embedded or combined together. Elements are building blocks of matter, they are mostly abundant in the universe e.g Oxygen, Hydrogen, Carbon.
