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It explains the flow of information in biological systems, especially in eukaryotes. It can be simplified to "DNA makes RNA makes protein". This explains how DNA, which is passed down the genera...

This is a rather fundamental question and it's important to get it right. Remember, the central dogma of biology is, in its most basic form, DNA makes RNA makes protein. Transcription is the process by wh...

Aerobic respiration uses oxygen/O2 while anaerobic respiration doesn't use oxygen.Aerobic respiration produces carbon dioxide/CO2 as a waste product while anaerobic respiration doesn't (it produces lactic...

Good question. You must think about these questions in progressive steps. The first step is given - vasoconstriction. What does this cause? A reduction in the diameter of the blood vessel. So you've got t...

Within a population there is genetic variation between individuals. For example, individuals have different combinations of different alleles, which may or may not be passed onto their offspring. Genetic ...