Being an effective predator requires efficient sense organs. Prey often has to be located from a considerable distance and good spatial awareness comes into play during the moments of capture. The precise mix of sensory inputs used varies a good deal, just as it does in other animal groups; many rely on good eyesight for hunting; for others, smell and/or hearing are especially important. And you'll know from the TV programme (for example, in what was said about the importance of smell in brow

By the end of this unit you should be able to:

describe the lifestyle of a variety of insect eaters, from four orders;

give examples of adaptations linked to feeding in insect eaters;

explain the limited extent to which insectivores can be regarded as â€˜primitiveâ€™;

characterise typical adult mammalian dentition and understand dental formulae;

recognise teleology and write down accounts of evolution that do not assume

The electric and magnetic fields given by Equations 7.21 and 7.23 can satisfy all four of Maxwell's equations in empty space. Gauss's law and the no-monopole law are immediately satisfied because the fields are transverse. Faraday's law and the AmpÃ¨reâ€“Maxwell law will also be satisfied if we can find electric and magnetic fields that obey Equations 7.24 and 7.26.

We are looking for wave-like solutions, so it is sensible to try

5.1.4 Getting agreement with the no-monopole law

Substituting Equation 7.23 into the no-monopole law gives immediate agreement because

The no-monopole law is analogous to Gauss's law in empty space, and it leads to a similar conclusion: the magnetic wave must be transverse. This has already been established using Farada

5.1.2 Getting agreement with Gauss's law

Substituting the assumed form of the electric field (Equation 7.20) into the empty-space version of Gauss's law (Equation 7.16) gives

The first two partial derivatives are equal to zero because *f* does not depend on *x* or *y*. So we obtain

Information is everywhere these days â€“ in the form of images, written records, tables and graphs. In this part of the unit we want you to realise how useful graphs can be to analyse numerical information, and to show you some techniques that can help you decide how reliable this numerical information is.

It's often difficult to spot a trend or a relationship in a long list of numbers. Because the human mind is highly adapted to recognising visual patterns, it is often much easier to u

1.3 Marking decimals on a scale

Figure 2 shows a picture of a ruler. The major units are marked in centimetres (1 to 11 cm), whilst the intervals between the centimetres have each been split into ten equal, smaller units. These minor units are therefore *tenths* of a centimetre, commonly known as â€˜millimetresâ€™. (There are 10 millimetres in 1 centimetre

Simple rules for dealing with orders of magnitude and decimal points in decimal numbers: values ten times bigger than the order of magnitude you are looking at go to the left, ten times smaller go to the right, and less than 1 to the right of the decimal point.

*Note:* in many European countries, a comma is used instead of a decimal point. For instance in France and Germany two and a half (in other words 2.5) can be written as 2,5. This is important to bear in mind, for example, if

Suppose you have less than one of any particular unit: how would you represent that using the decimal system?

Well, we've already seen that decimal numbers rely on a positional system, in which values get smaller by factors of ten as you read from left to right. If we continue doing this, then the number to the right of a single unit represents tenths of that unit. A **decimal point** is then used to mark the boundary between the whole units and tenths of that unit.

For instanc

1.1 Introducing the decimal system of numbers

Many different systems for writing numbers have been developed over the history of humankind.

The easiest way of counting small numbers is to use your fingers, and for this reason many numerical systems, such as the decimal system, are based around the number ten. But what happens when you run out of fingers to count on?

Numbering systems get round this problem by using a system of *scale* in which many small units are represented by a single larger unit, and many of these la

By the end of this unit you should be able to:

understand the decimal system of numbering (hundreds, tens, units);

explain the best way to write down decimal numbers and associated units of measurement in the healthcare workplace, in a manner that avoids confusion;

understand the concepts of discrete and continuous variables and the best types of graphs used to represent these data;

analyse, construct and extract information from grap

This sample of S110 material is taken from Module 2, entitled *Using numbers and handling data*. As you read the material, bear in mind that it is taken from a work-based course, designed for those who are employed in the health services, perhaps as a paramedic or as operating theatre staff. If you were a student on the course, you would have an OU tutor to help you, plus a work-based mentor supplied by the employer â€“ normally the NHS. The aim is to use the workplace as a teaching aren

The content acknowledged below is Proprietary (see terms and conditions). This content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

## Author(s):

Now you have completed this unit, try the following questions to test your understanding of this material.

## Question 19

Like the Variscan Orogenic Belt, the Caledonian includes large granitic intrusions. Using the Author(s):

Most of the usable water is derived from the 1.1 Ã— 10^{5} km^{3} that falls over the land surface each year as rain, snow, sleet or hail. The collective term for all of these sources of water is **precipitation**. At this point, you will consider the size of the drops of water that make up clouds or rain (Figure 5).

By the end of this unit you should be able to:

recognise definitions and applications of each of the terms printed in

**bold**in the text;understand and apply basic grammatical terminology;

describe briefly the different types of sounds used in speech in both acoustic and articulatory terms;

outline the key features of human language as compared to the vocalisations of other species;

describe the complex psychologi

7 Sedimentation and tectonics at a mid-Ordovician to Silurian active margin

The document attached below includes the seventh section of *Mountain building in Scotland*. In this section, you will find the following subsections:

7.1 Introduction

7.2 Mid-Ordovician to Silurian sedimentation in the Midland Valley Terrane

7.2.1 Ordivician sedimentation

7.2.2 Silurian sedimentiation

7.2.3 Summary of Section 7.2

7

Some findings indicate that, for moderate loudness levels, humans can detect a frequency change of about 1 to 3 Hz for frequencies up to about 1000 Hz. Figure 37 shows a plot of the smallest frequency difference for which two tones can be discriminated for a number of reference tones. You can see from the figure that up to about 1000 Hz, the D

## Activity 14

What is the condition that results from vitamin C deficiency and what are its symptoms?

### Answer

You will probably remember from the start of this

Vitamin B_{12} is yet another group of compounds, this time with an atom of the metal called cobalt (present in only trace quantities in the body) in their structure, hence the alternative name â€˜cobalaminâ€™. Vitamin B_{12} works alongside folate and if levels of it are low, folate deficiency symptoms occur too. It is stored in the liver and in general the body does not appear to need a regular intake. Many people have enough B_{12} stored in their liver to last for