This collection of STEM resources is based on the living world. Resources are listed in order of stage.

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### bioNRICH

bioNRICH is the area of the stemNRICH site devoted to the
mathematics underlying the study of the biological sciences,
designed to help develop the mathematics required to get the most
from your study of biology at A-level and university.

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### Mathematical issues for biologists

STEM students at university often encounter mathematical
difficulties. This articles highlights the 8 key problems for
biologists.

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### Core Scientific Mathematics

This is the area of the advanced stemNRICH site devoted to the core applied mathematics underlying the sciences.

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### chemNRICH

chemNRICH is the area of the stemNRICH site devoted to the
mathematics underlying the study of chemistry, designed to help
develop the mathematics required to get the most from your study of
chemistry at A-level and university.

problem

### Discuss and Choose

This activity challenges you to decide on the 'best' number to use in each statement. You may need to do some estimating, some calculating and some research.

problem

### Big and small numbers in the living world

Work with numbers big and small to estimate and calculate various quantities in biological contexts.

project

### Terrariums

Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.

problem

### Maths is everywhere!

Maths is everywhere in the world! Take a look at these images. What mathematics can you see?

problem

### Alternative Record Book

In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

problem

### Biology measurement challenge

Analyse these beautiful biological images and attempt to rank them in size order.

problem

### Packing 3D shapes

What 3D shapes occur in nature. How efficiently can you pack these shapes together?

problem

### Ratios and Dilutions

Scientists often require solutions which are diluted to a
particular concentration. In this problem, you can explore the
mathematics of simple dilutions

problem

### Robot Camera

Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?

problem

### Dilution series calculator

Which dilutions can you make using 10ml pipettes and 100ml measuring cylinders?

list

### Disease Dynamics - understanding the spread of diseases

A chance to explore the mathematics of networks as applied to epidemics and the spread of disease.

problem

### Big and small numbers in biology

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

problem

### Catalyse that!

Can you work out how to produce the right amount of chemical in a
temperature-dependent reaction?

problem

### Chi-squared faker

How would you massage the data in this Chi-squared test to both
accept and reject the hypothesis?

problem

### Population Dynamics - part 5

Fifth in our series of problems on population dynamics for advanced students.

problem

### Reaction types

Explore the rates of growth of the sorts of simple polynomials
often used in mathematical modelling.

problem

### Stats statements

Are these statistical statements sometimes, always or never true?
Or it is impossible to say?

problem

### Drug stabiliser

How does the half-life of a drug affect the build up of medication
in the body over time?

problem

### Population Ecology using Probability

An advanced mathematical exploration supporting our series of articles on population dynamics for advanced students.

problem

### Whose line graph is it anyway?

Which line graph, equations and physical processes go together?

article

### Genetic Intrigue

Dip your toe into the fascinating topic of genetics. From Mendel's
theories to some cutting edge experimental techniques, this article
gives an insight into some of the processes underlying a
fundamental biological discipline.

problem

### Predator - prey systems

See how differential equations might be used to make a realistic
model of a system containing predators and their prey.

problem

### Bird-Brained

How many eggs should a bird lay to maximise the number of chicks
that will hatch? An introduction to optimisation.

problem

### Why multiply when you're about to divide?

A brief introduction to PCR and restriction mapping, with relevant
calculations...

problem

### Graphic biology

Several graphs of the sort occurring commonly in biology are given.
How many processes can you map to each graph?

problem

### Real-life equations

Here are several equations from real life. Can you work out which measurements are possible from each equation?

problem

### Is your DNA unique?

Use combinatoric probabilities to work out the probability that you
are genetically unique!

problem

### Population Dynamics - part 3

Third in our series of problems on population dynamics for advanced students.

list

### Population Dynamics Collection

This is our collection of tasks on the mathematical theme of 'Population Dynamics' for advanced students and those interested in mathematical modelling.

problem

### Blood buffers

Investigate the mathematics behind blood buffers and derive the
form of a titration curve.

problem

### Population Dynamics - part 2

Second in our series of problems on population dynamics for advanced students.

problem

### Population Dynamics - part 1

First in our series of problems on population dynamics for advanced students.

problem

### Population Dynamics

This problem opens a major sequence of activities on the mathematics of population dynamics for advanced students.

problem

### Population Dynamics - part 4

Fourth in our series of problems on population dynamics for advanced students.

problem

### Branching Processes and Extinction

An advanced mathematical exploration supporting our series of articles on population dynamics for advanced students.

problem

### Population Dynamics - part 6

Sixth in our series of problems on population dynamics for advanced students.