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Biology
GCSE

Describe how different environmental factors affect the direction of root and shoot growth in plants. You should refer to the role of plant hormones.

You could refer to the following. Shoots grow upwards towards light (positive phototropism) and grow against the force of gravity (negative gravitropism). Roots grow with the direction of gravity (posi...

LP
Answered by Liam P. Biology tutor
23543 Views

What are the advantages provided to plant cells by having a cell wall?

Cell walls provide plant cells with protection and structure. Protection may be from adverse conditions or from biotic threats like fungi or bacteria. The structure of the plant is dependent on the pre...

PO
Answered by Peter O. Biology tutor
7059 Views

What is a pathogen?

A pathogen is a microorganism that causes a disease. Pathogens spread communicable diseases meaning that they are transmitted person to person and are infectious.
Types of pathogens include bacteria,...

FD
Answered by Francesca D. Biology tutor
22801 Views

How can bacteria become resistant to antibiotics and how can doctors reduce the number of bacteria that become resistant?

-A mutation in a pathogen may produce a new strain. This new strain may become resistant to an antibiotic through natural selection. The new strain ma...

HC
Answered by Helen C. Biology tutor
15206 Views

What does an organism use energy from respiration for?

In all organisms, allows creation of bigger molecules from smaller ones

In animals, enables muscle contraction

In some animals (mammals and birds), provides heat to maintain...

BH
Answered by Bertie H. Biology tutor
9628 Views

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