3 and 4 are correct. A compound is a collection of two or more molecules, whereas a molecule is a collection of two or more atoms. 1 is not true because its talking about two atoms together which is a molecule. 2 is not true because it is still talking about two atoms which is still a molecule. 3 is true because molecule are subunits of compounds. 4 is true because elements and atoms are the same thing, and two or more atoms is a molecule.
In Chemistry, Dynamic Equilibrium refers to a state of balance in between two forces in motion. It exists once a reaction which is reversible ceases to change its ratio of the reactants but the substances move at an equal rate in between the chemicals.
Answer:
random mating
<h3>matution:a change in the chromosomes or genes of a cell</h3>
Explanation:
crossing over(or recombination) between chromotids or homologous chromosomes during meiosis
Answer:
active transport
Explanation:
Active transport is the energy-requiring process of pumping molecules and ions across membranes "uphill" against a gradient. The active transport of small molecules orions across a cell membrane is generally carried out by transport proteins that are found in the membrane.
