Active transport is the process in which substances are absorbed against a concentration gradient, i.e. from a lower to a higher concentration.
Answer:
Air is matter because it's make up of a mix of different gases. These are made up of elements such as hydrogen, oxygen, and nitrogen, which are made of matter.
Explanation:
is there a word count requirement?
Thought and action are the two main functions
Always remember quadrilateral means 4 sides
