Top answers

How do white blood cells protect the body?

White blood cells in the body can attack pathogens, which are micro-organisms which cause disease. The white blood cells can ingest the pathogen, produce antibodies which destroy a particular pathogen, or pr...
EM
Answered by Eleanor M. • Biology tutor
12641 Views

How does Meiosis increase variation?

In the first stage of Meiosis 1 - Prophase 1, after the chromosomes have coiled and condensed they ay touch each other at points known as chiasmata, and Crossing Over occurs. This is where genetic informatio...
BC
Answered by Bobbie C. • Biology tutor
11816 Views

How is an electrical impulse transmitted through the heart?

Contraction of the heart is myogenic meaning it initiates from within the heart muscle itself (myo=muscle, genic= created). Therefore, no extra nerves need to signal the heart to contract which is important ...
RZ
Answered by Rebecca Z. • Biology tutor
19857 Views

Name the three components of a nucleic acid

pentose sugar and phosphate group backbone nitrogenous base
GS
Answered by George S. • Biology tutor
4836 Views

How do humans regulate their body temperature?

The hypothalamus in the brain controls the body temperature. If the temperature gets too high: receptors in the hypothalamus detect the change. the heat loss centre is stimulated causing 3 things: vasodialat...
OH
Answered by Ollie H. • Biology tutor
5302 Views