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How can white blood cells defend against pathogens? (Give 3 ways)

White blood cells (WBC) are like our body's guards patrolling our blood to look for any pathogens (bacteria and virus).WBC kills pathogens in the following ways before pathogens make us ill. Eating them : WB...
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Answered by Yvonne L. • Biology tutor
44775 Views

What are the differences and similarities between animal cells and plant cells in terms of structure and function?

Animal cells and plant cells similarities: Structure Both animal and plant cells contain a nucleus, cytoplasm, cell membrane, mitochondria and ribosomes.Both animal and plant cells are eukaryotic (i.e. conta...
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Answered by Mariyum K. • Biology tutor
20895 Views

Describe the process of a cardiac cycle.

Cardiac cycle is the contraction and relaxation of the heart to push the blood to the rest of the body. Systole = contraction (so, atrial systole means contraction of the atrium, ventricular systole means co...
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Answered by Yvonne L. • Biology tutor
5283 Views

How do bacteria have a role in the nitrogen cycle?

This answer is best supported with a whiteboard All living things need nitrogen, but nitrogen gas is too unreactive for plants and animals to use directly. Bacteria's main role in the nitrogen cycle is to be...
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Answered by Katie D. • Biology tutor
13987 Views

How does DNA replication work?

First, the DNA Helicase enzyme ‘unzips’ the two stranded DNA by breaking the hydrogen bonds present between the complimentary base pairs on the two opposing strands. Then this leaves two exposed strands, all...
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Answered by Tarek K. • Biology tutor
3301 Views