Top answers

Explain the process of eutrophication

The process begins when excess fertiliser, which has been used for farming, is flushed into rivers or lakes by rainwater. The fertiliser then provides nutrients such as nitrates which allow plant life in the...
HM
Answered by Henry M. • Biology tutor
7159 Views

What is a hormone and what do they do?

A hormone is a chemical messenger which travels in the blood. Hormones cause other tissues and organs to either produce other hormones or carry out chemical reactions. Water-soluble hormones cause this by bi...
AD
Answered by Amber D. • Biology tutor
5166 Views

Why do we use aseptic techniques in laboratories?

Aseptic techniques prevent the contamination of a sample from other bacteria or pathogens. It is important to do this to ensure that the sample we are dealing with remains pure. Microorganisms are in the env...
EB
Answered by Emma B. • Biology tutor
3874 Views

What organelles are found in plant cells, but not in animal cells? What are the functions of these organelles?

chloroplasts which are able to trap light so it can be used to generate energy through photosynthesis - cell wall which provides the plant cell with structure
SA
Answered by Safia A. • Biology tutor
11063 Views

Describe the structure of a standard eukaryotic animal cell

The cell has an outer membrane known as the cell membrane, which envelops the cytoplasm. The cell also contains mitochondria which work to provide the cell with energy (in the form of ATP) and a nucleus, whi...
SA
Answered by Safia A. • Biology tutor
3289 Views