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To categorise plants by comparing their characteristics

Natural sciences

Life and way of living

Educator section

Memorandum

Assignment 1:

An instrument that is used to identify a plant or an animal (to determine the name). It provides options according to which the characteristics of the plant or animal can be selected to serve as a guide to the answer (the name of the relevant plant or animal).

Activity 4: to categorise plants by comparing their characteristics [lo 2.2]

The development of a key with which to classify plants

You have now been introduced to various characteristics of plants and have learned that we can group the plants in terms of their characteristics. A lot of work has already been done in this regard by biologists and all the plants that are known to people have already been divided into groups. New plants that are discovered can also be placed into a group immediately.

The advantage of this is that we can identify any plant that we see, find out its name and discuss it with other people. For example, we can determine whether a plant is indigenous or exotic, whether it is a harmful weed, what we can do with it, etc.

To be able to identify a plant we can make use of a key . We will now use our knowledge about plant characteristics and plant groups to compile our own key.

The easiest way is to pretend that you have seen a particularly interesting plant and want to go to a plant expert (botanist) to ask him/her to which group the plant belongs. Try to think what type of questions you would ask such a person in order to find out the answer.

The person most probably will ask questions to which you can answer yes or no. In this manner, it is possible to use each question to eliminate one possibility and thereby to move in the direction of the answer.

Let us try. Use the diagrammatic division of plants on the previous page and work through it from top to bottom on the basis of the questions that follow:

1. Does the plant form seeds?

  • Yes ____________________________________________________

(Proceed to 2)

  • No ___________________________________________ Algae or mosses

(Proceed to 4)

2. Does the plant bear flowers?

  • Yes _____________________________________________ (Proceed to 3)
  • No _______________________ Coniferous plants, e.g. fir tree (Proceed to 12)

3. Does the plant have vein-like leaves or does it have an adventitious root?

  • Yes ________________ Dicotyledonous plants e.g. proteas (Proceed to 20)
  • No ____________ Monocotyledonous plants, e.g. grasses (Proceed to 40)

Assignment 1:

Describe in your own words what a key for the identification of plants or animals is and how it is used.

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Assessment

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

Assessment Standard 2.2: We know this when the learner categorises information (can compare the properties of categories of organisms).

Questions & Answers

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
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
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 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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