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How do we know whether our results indicate whether or not there is a relationship between our variables?

We can test for 'significance' in order to determine whether it's likely that the results that we see are due to random chance or due to a relationship between them. This involves using a statistical test (t...
HS
Answered by HENRY S. • Biology tutor
3158 Views

Describe how oxygen in the air reaches capillaries surrounding alveoli in the lungs?

The air that is breathed in passes down the trachea, the bronchi and bronchioles before reaching the alveoli. Oxygen is able to diffuse across the walls of the alveoli and the pulmonary capillaries into the ...
JW
Answered by Jennifer W. • Biology tutor
21471 Views

What is the function of ATP and explain how is it suitable for its function

ATP is a molecule called adenosine triphosphate, used to provide energy for various reactions within the cell and hence sometimes called 'universal currency' of the cell. ATP molecule is made of adenine, rib...
AK
Answered by Antonina K. • Biology tutor
16959 Views

Why are more cells produced as a result of Meiosis (compared with mitosis) but they contain fewer chromosomes?

The reason for this is due to the process of Meiosis involving an additional cell division step.Mitosis involves 1 cell, which replicates it's DNA resulting in there being 2 'full sets' of chromosomes contai...
GL
Answered by Grace L. • Biology tutor
3785 Views

Explain how are the lungs adapted for fast gas exchange?

The lungs are specifically adapted for gas exchange (diffusion) - meaning the lungs allow oxygen into the blood stream and carbon dioxide out. To ensure our cells can respire properly, we want fast and effic...
KB
Answered by Katie B. • Biology tutor
16138 Views