| For this portion of the exam you
will be creating the three HTML documents as shown in the handouts.
Instructions
Create a folder on the datadrive and name it: firstname_lastname_exam
-- as in doug_johnson_exam
Note: After you complete the exam, please copy
your exam folder to a floppy disk. This becomes your back-up in
case something goes wrong when your file is uploaded to my server.
Below you will find the images and text required to build the
three pages of this website.
Right click and save the images below into the exam folder you
have just created.
The three file names you are to use for your HTML documents are:
index.htm
month.htm
survey.htm
For the survey.htm - make the form action to be --- mailto:doug@digitalvertebrae.com
When you have completed the exam, please let me know and I will
come over and upload to my server. I will also create a floppy
copy as a back-up for myself.
Ensure that your image files are named the same as they are below.
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| Text for index.htm
True Bugs belong in the insect Order Heteroptera. There are approximately
40,000 species of true bugs in the world, and over 3,800 in the
United States.
Defining the Order
The True Bugs are insects that have two pairs of wings, the front
or outer pair of each divided into a leathery basal part and a
membranous apical part. These wing covers are held over the back
and often partly folded. True bugs have hypodermic-needle-like
mouthparts that allow them to extract subsurface fluids from plants
and animals. Bugs undergo incomplete metamorphosis, with their
young looking much like adults, but without wings.
Interesting Facts about True Bugs
Some true bugs have been utilized as food for both humans and
pets.
Certain water bugs are used to give particular flavors to Chinese
food, and are even imported into California for this purpose.
An examination of commercial "turtle food" may reveal
that it is composed largely of small water bugs.
Some bugs are capable of producing a foulsmelling chemical from
glands in the sides of their bodies, especially the group known
as Stink Bugs. This disagreeable odor turns away predators, but
has no staining effect to humans.
The Common Milkweed Bug has bright orange and black colors, and
feeds on milkweed plants. These colors are a warning to vertebrate
predators that the bug is poisonous, with milkweed plant toxins.
Although sound making in insects is generally restricted to katydids
and their relatives, and cicadas, some Assassin Bugs can produce
hissing sounds by rasping their feeding tube against the underside
of their body.
Aquatic Bugs
Many true bugs are aquatic. Bugs of the Family Notonectidae are
known as Water Boatmen, and are capable predators of other insects
on the water surface. More familiar is the group of aquatic bugs
known as Water Striders, which move on the water surface with
their "feet" barely touching the surface. They detect
the ripples of other insects on the water and run quickly to capture
and kill the prey. Water scorpions are true bugs in the Family
Nepidae that have long breathing tubes on their rear ends, which
enables them to breathe air while still under water. They can
survive in warm ponds or polluted waters low in oxygen.
The Marvel of Insect Wings
Insects can hover, fly backwards, accelerate suddenly to over
150 kilometres per hour, and perform acrobatics that put a fighter
pilot to shame.
Yet science has spent the past three decades struggling to explain
how. Aeroplanes rely on a smooth flow of air over wings that are
forced forward by their engines. Insects, which lack engines,
flap their wings to get airborne, creating an unstable, turbulent
air flow that actually generates several times more lift than
conventional aerodynamics predicts.
"The better we understand the functioning of insect wings,
the more subtle and beautiful their designs appear. Structures
are traditionally designed to deform as little as possible; mechanisms
are designed to move componant parts in predictable ways. They
have few if any technological parallels yet." - (Robin J.
Wootton, "The Mechanical Design of Insect Wings", Scientific
American, v. 263, November 1990, p.120 )
Visit Scientific
American for more information on bugs! |
| Text for month.htm
Black Ant
Order: Hymenoptera ("membrane winged")
Characteristics: Elbowed antennae: biting mouthparts; if present,
two pairs of membranous wings, fore and hindwings hooked together;
abdomen constricted at base giving appearance of a waist which
bears characteristic nodes or scales; metamorphosis complete,
with egg, larval, pupal and adult stages; possess complex social
system.
Family: Formicidae
Species Characteristics: Black Ant (Lasius Niger). Workers 3.4
- 5mm long, queens 15mm long;
Colour: workers dark brown-black, queens mid-brown; waist of
only one segment.
Distribution: In Britain comparatively few indigenous species,
which nest outdoors, are likely to enter houses regularly. One
such species is the Common black ant (Lasius niger). An active
insect, it nests outside in grass and walls and under paving.
It will forage widely in search of food, which is how it comes
to enter domestic premises.
Significance: Foraging worker ants cause a nuisance as they travel
widely in search of food, following well-defined trails and clustering
around the food source. Sweet foods are preferred. In gardens
their excavations around plant roots make the soil excessively
dry. They will also cultivate greenfly, themselves pests, in order
to obtain the sugary honeydew secretions that these aphids produce.
On the other hand they can be beneficial; predators of other insects
and general scavengers. They are obviously an unpleasant sight
and may damage food used for human consumption.
Life-cycle: The gregarious habits of ants have resulted in the
development of a caste system, whereby individuals are responsible
for specialised duties within the community. There are:
workers (sterile females)
fertile males
queens (fertile females).
The worker ants build and extend the nest, look after larval forms
and forage for food, whereby they become pests. The queens do
none of these duties, but remain almost exclusively within the
nest. Mating amongst sexual individuals takes place on the wing.
These spectacular swarms involve large numbers of ants. The actual
swarms only persist for 2 - 3 hours. After mating the males perish
but the females shed their wings and dig a cell in the soil where
they overwinter. The eggs are laid in late spring and the white
legless larvae hatch 3 - 4 weeks later. The larvae are fed on
secretions from the queen's salivary glands until fully grown,
when they will pupate, forming the well-known "ant eggs".
From these pupae emerge the first brood of worker ants. These
workers take over foraging duties and tend subsequent broods.
The sexual forms are not produced until later. The entire cycle
takes about 2 months to complete. Under favourable conditions
a nest may persist for several years.
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