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Co-dominance is when two alleles are expressed equally in the phenotype in the heterozygote. For example, plants that are homozygous for one allele may be red and plants that are homozygous for another al...

The process responsible for gas exchange in animals is diffusion.
Air, containing oxygen needed for cellular respiration, is inspired in fills the lungs. The high concentration of oxygen in the lung...

Saliva contains salivary amylase which digest some carbohydrates in mouth

Enzymes: Enzymes are biological catalysts, meaning they speed up the rate of the reaction without being used up. An example of an enzyme is amylase, which is produced by the saliva...

White blood cells can have different roles and are important for protecting the body against pathogens. They can ingest a pathogen and destroy it, some produce antitoxins...