<< Chapter < Page Chapter >> Page >
Figure 1 Threads of mucor or mould on bread
Figure 2 Mushroom with spore-bearing gills below the cap
Figure 3 The Botelus, another edible fungus

When you examine fungi under a microscope, you will see many threads growing in all directions, almost like an untidy cobweb. Each thread is branched, like a tree, and each branch has a further range of branches. Small round knobs are visible at the ends of some branches. These little knobs are containers, because they actually are hollow and are full of small seeds. These are called spores. They are so very small that a thousand of them will fit onto the head of a pin. Fungi are different from other plants in that they do not need light for regeneration, but they do need air, food and water. People do not need to plant the seeds of fungi as spores will simply begin growing wherever there is food, air and moisture, for instance on a damp towel. The skin of fruit is also always infested with spores, but they will not develop while the fruit is kept dry.

Assignment 16

Cultivating Bread Mould

You will be cultivating fungi now. Take two slices of white bread. Break them in half. Wipe each piece of bread along the floor or across a windowsill to pick up some spores. Now sprinkle water on the bread, but take care not to wet it too much or the bread will break. Place each piece of bread in an airtight container, and screw on the lid. Place the containers in a warm, dark cupboard. The spores will have all that they need, namely food (the bread), water and the air that is trapped in the container. Warmth is not necessary, but will encourage faster growth of the spores. Take the containers out of the cupboard after three days and examine them to answer the following questions:

CONTROL YES NO
Did I execute the experiment with care? ______ ______
Was my experiment successful? ______ ______
Did a downy, white growth develop on the bread? ______ ______
Did black spores like grains of pepper occur in the bread mould? ______ ______
Give a possible reason, if necessary, for the lack of success of the experiment: ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________

(ii) Usefulness for people

Except for the fact that people use some fungi as food, fungi are also used as medication. A fungus that has become a wonderful friend to people, namely Penicillium, kills harmful bacteria in the human body.

The best-known fungus of those used by people probably is the yeast fungus that is used in wine making.

Assignment 17

Do some research to find out how the yeast fungus manages to make wine. Write two paragraphs on how this fungus operates and on other useful ways of using the fungus.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

The food chain therefore is an endless process.

Food is the medium through which materials, to construct body tissues, are acquired. In this way energy for life is passed on along the chain!

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner We know this when the learner leads investigations and gathers data.

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.3: We know this when the learner interprets information.

Questions & Answers

I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 6' conversation and receive update notifications?

Ask