Top answers

Biology
All levels

Biology AQA Past Paper (2015) - Topic 7. Ecology: What is eutrophication?

Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants (algal blooms), depletion of fish speci...

DM
Answered by Diego M. Biology tutor
3856 Views

How does a syanpse work?

An electrical impulse (action potential) travels along the axon of the pre-synaptic neuron. This causes the neuron to release chemical neurotransmitters which diffuse through the synaptic cleft and bind t...

PD
Answered by Pavleen D. Biology tutor
2954 Views

What is the tertiary structure of a protein?

The tertiary structure of a protein is the final folding of a protein into its final shape. It involves interactions between the R-groups of the amino-acids in the polypeptide chain. These interactions ar...

SS
Answered by Shiv S. Biology tutor
6684 Views

what is the structure of a photosystem?

Photosystems sit in the thylakoid membrane of chloroplasts. There job is to capture light energy and convert it into energy that can be used by the plant to eventually create ATP. Photosystems are made up...

MF
Answered by Matthew F. Biology tutor
18155 Views

examiners can ask us to design an experiment in order to explore an aspect of ecology. How would I go about doing this?

  1. Name the exact type of equipment used i.e. belt or line transect; frame, open or point quadrat. The answer to this will relate to the aims of the study. Trancsects are useful for studying change...

MF
Answered by Matthew F. Biology tutor
2651 Views

We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning