Which nutrient is considered the primary source of energy?

The characteristic by which organisms are able to detect and respond to changes in their environment.

The characteristic by which living organisms get rid of toxic and unwanted substances.

The characteristic by which all types of organism are able to produce new organisms like themselves.

The type of reproduction that involves one parent only.

The gas that all living organisms produce during respiration and plant use in photosynthesis.

The gas that plants produce and we use in respiration.

The heart is an example of this level of organization.

The thick layer on the outside of a plant cell.

The thin layer between the cell wall of plant cells and their cytoplasm.

The clear jelly that fills most of a cell.

Substance that fill chloroplasts.

Substance in red blood cells that helps them to carry oxygen.

The specialized cells that carries electrical signals around the body.

The blood cells with no nuclei.

A tissue found in animals but not in plants, which helps to sweep mucus up from the lungs.

The gas needed for photosynthesis is carbon dioxide.

Plants provide animals with both food and oxygen.

The main nutrient which milk, meat, egg and chicken are rich in.

The young of this group of vertebrates live in water but their adults live on land.

The group of vertebrates to which humans belong.

The only group of vertebrates that feed their offspring on milk.

The two groups of vertebrates that lay eggs on land.

The group of arthropods with six jointed legs.

The group of arthropods with multiple body segments and one or two pairs of jointed legs emerging from each segment.

Animals that feed upon meats of animals only.

Animals that feed upon plants only.

The organ that stores urine until it is expelled outside the body.

The type of respiration that needs oxygen.

The type of respiration that take place in absence of oxygen.

The blood component that helps blood to clot.

The liquid part of blood.

The organ that absorbs water and minerals from the soil in plants.

All cells have nuclei.

The main aim of digestion is to break down complex food particles into small soluble molecules which could be absorbed and which the body can make use of.

The food group that is needed for both building tissues, growth and repair.

The specialized animal cell that defends the body against harmful microorganisms.

White blood cells have no nuclei.

Which of the following is NOT true?