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Natural sciences

Ecosystems and the environmental balance

Educator section

Memorandum

Assignment 15:

1. Plants and animals die

2. Plants and animals produce waste material

3. Decomposers degrade the waste material and use some parts of it as food

4. Other parts are degraded as chemicals and then released into the air or soil

5. The chemicals are absorbed by other plants and taken up into the food chain

Leaner section

Content

Activity: to study the important role of plants in the ecosystem [lo 1.2, lo 2.3]

Plants (producers) simply take non-living material (water, sunlight, carbon dioxide and minerals) and produce plant food. This process is called photosynthesis, of which you will learn a great deal in the next module. Oxygen is released simultaneously.

Design two more food chains with plants as the producers.

(a) The role of fungi in the ecosystem

Fungi are regarded as the “poor” family members of the plant kingdom because they do not contain green colouring. The green colouring, chlorophyll, enables green plants to produce their own food from carbon dioxide and water. Green plants are therefore self-sufficient and do not depend on other living things for food. Fungi and bacteria, on the contrary, are as dependent as animals on the food that plants have to prepare for them.

When a plant or an animal dies, the energy stored in them is not lost. Microscopic fungi and bacteria live on the dead bodies and thereby break them down. In this way, such dead material becomes part of the soil once more. Plants that do this are called decomposers because of the unique role they play in nature.

Assignment 15

Study the following diagrammatic representation of the process of decay. It shows how dead organisms are broken down and recycled by decomposers. Read the captions that are provided below and copy them into the appropriate spaces. Take note of the fact that the captions are not given in the correct order:

  • Plants and animals produce waste material, e.g. leaves.
  • Decomposers break down the waste material and use part of it as food.
  • Other parts are broken down into chemicals and are released into the air or the soil.
  • Plants and animals die.
  • The chemicals are absorbed by other plants and are again taken up into the food chain.

(i) The structure of fungi

Fungi consist of branched threads that may be divided into sections (e.g. bread mould) or may be combined in a large, solid body (e.g. mushrooms). Many fungi are edible, but some are extremely poisonous. It is much safer to eat well-known mushrooms only. The mushroom is pushed up from below the soil as a small, round button. When it grows bigger, it stretches out on a stem and eventually opens up like an umbrella.

Below the umbrella the spore-bearing gills radiate from the stem. In the common edible button mushrooms these gills are pale pink when the fungus is young and become blackish-brown as the fungus matures. None of the poisonous toadstools have this colour, so the colour provides the best indication to whether you are dealing with a poisonous toadstool or an edible mushroom. One should never eat a fungus that looks like a mushroom but has white gills, because this could lead to death.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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