Plants on Earth provide food, some even provide shelter to some animals, and plants such as trees provide oxygen to the environment.
Objectivity: The test should be free from subjective—judgement regarding the ability, skill, knowledge, trait or potentiality to be measured and evaluated. 2. Reliability: This refers to the extent to which they obtained results are consistent or reliable.
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Explanation:
red blood cells,white blood cells and platelets
A water molecule, because of its shape, is a polar molecule. That is, it has one side that is positively charged and one side that is negatively charged. The molecule is made up of two hydrogen atoms and one oxygen atom. The bonds between the atoms are called covalent bonds, because the atoms share electrons.
Dependent reaction is the factor that is observed and measured