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Not all energy is transferred between different levels of the food chain due to not all the organisms being consumed, often not the entire organism is eaten either, leaving behind energy in the hair/fur, ...
A diseased coronary heart artery has fatty diposits (atheroma) that narrow the lumen, and block bloodflow. As the coronary arteries primarily serve to nourish the heart, this can weaken it and if it remai...
Transcription is the process where a segment of DNA is copied into a segment of mRNA. This takes place in the nucleus. First the segment of DNA needs to be unzipped, so an enzyme breaks the hydrogen bonds...
Both are considered microorganisms but viruses are arguably not living organisms as they cannot reproduce without living hosts . Apart from this, viruses are much smaller than bacteria and differ in terms...
The role of a sperm cell is to fertilise an egg. The head contains the nucleus, which holds the male genetic material. It has a tail for swimming to the egg. It is packed with mitochondria to supply the e...
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