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While both smooth and striated muscle are found in the human body, smooth muscle is found in the viscera (internal organs), and striated muscle is attached to the skeleton. Striated muscle is composed of mus...

As the environment changes, some species with disadvantageous alleles will fail to compete successfully for food, shelter or a mater. This means that they are less likely to survive to reproduce, so these al...

To produce a good reliable study, you would first need a sufficient number of participants to represent the actual population. Therefore a large sample size (number of participants in the study) would produc...

A nucleotide is the basic unit that makes up DNA. A singular nucleotide is made up of x3 components: A base (A, T, C or G) 5 Carbon sugar (deoxyribose = DNA or ribose = RNA) Phosphate group (forms a bond bet...

For the heart to pump efficiently the control of contraction of its atrium and ventricles needs to be coordinated. Electrical signal starts at the sinoatrial (SA) node, also known as the pacemaker node. The ...