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How are animals adapted for effective gas exchange?

Many alveoli which provide a large surface area for rapid diffusion. The walls of the capillaries are only one cell thick which provides a short diffusion pathway, allowing rapid diffusion. Blood circulation...
RV
Answered by Rose V. • Biology tutor
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What is a mitochondria?

A mitochondria is found inside of the cell, and it is used to make energy (or ATP).
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Answered by maathiny k. • Biology tutor
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What is the structure of a protein?

Proteins are long chains of amino acids connected by peptide bonds. The structure of proteins is broken down into 4 components. The primary structure of a protein is simply the order of amino acids found in ...
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Answered by Richard N. • Biology tutor
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Describe semi-conservative DNA replication

The double helix structure unzips which is catalysed by the DNA Helicase enzyme. DNA Helicase overcomes hydrogen bonding between nitrogenous bases. Two strands are produced, each one acts a template. Free DN...
PA
Answered by Prashant A. • Biology tutor
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Explain how pressure differences in the heart ensure sufficient pumping of blood into the arteries. (3)

increased pressure in the ventricles the pressure in the ventricles is higher than the pressure in the atria causing the atrioventricular valves to closecausing the semilunar valves to open and the blood flo...
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Answered by Kelly W. • Biology tutor
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