Top answers

How does an invasive species cause negative effects on the biodiversity of an ecosystem?

Invasive species can cause negative effects on biodiversity through out-competing native species, becoming a voracious top predator and killing most of the native animals/fauna (especially since if there are...
SB
Answered by Susan B. • Biology tutor
3248 Views

In answer section.

The polymerase chain reaction (PCR) is a process to 'amplify' DNA to provide sufficient quantities for further analysis. PCR involves repeated cycles of heating and cooling of the reaction mixture. A single ...
JP
Answered by James P. • Biology tutor
3488 Views

Q: Give examples of how the human body maintains homeostasis when we exercise.

A: When we exercise the tissues of our body have an increased requirement for oxygen. The body facilitates this by increasing the respiratory and heart rate, thereby increasing the rate of gas exchange in th...
AM
Answered by Amy M. • Biology tutor
3638 Views

Explain the process of synaptic transmission (6 marks).

When the action potential reaches the pre-synaptic knob, voltage gated Ca 2+ channels open which allows Ca 2+ into the pre-synaptic knob - This causes vesicles which contain neurotransmitter such as acetylch...
DH
Answered by Dominic H. • Biology tutor
11593 Views

Contrast facilitated diffusion and active transport

Since the key word is contrast infomation about both facilitated diffusion and active transport is needed. Facilitated diffusion does not require ATP whereas active transport does require ATP Facilitated dif...
DS
Answered by Daniel S. • Biology tutor
5094 Views