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Natural sciences

Grade 9

Plants: structure, including genetics

Module 26

Structure of a plant cell

Activity:

To understand the structure of a plant cell

[lo 2.1, 2.2, 2.3, 2.4]

Ask your educator for a leaf from a moss plant, or some other example, to study through a microscope.

You could study the structure of a typical leaf. The following illustration is a simple line drawing providing a two-dimensional image of what you might see:

The cell consists of a framework filled with a special liquid – PROTOPLASM – with a variety of structures floating in it. Some of these are too small to be seen through an ordinary microscope. We need to use an electron microscope to examine these small structures. Remember that you see the cell from one side only. It is actually shaped like a brick and we say that it is three-dimensional. Ask your educator to explain this concept to you.

Find out about microscopes and electron microscopes.

Assignment 1:

1. Provide a caption for the sketch.

2. Add labels in the numbered boxes.

3. What are the functions of each?

LabelNumber Labels
1.
2.
3.
4.
5.
6.
7.
8.

Assignment 2 : The nucleus contains fine details that you need to get to know before working through the rest of the module:

Discuss each of the labels of the nucleus in class and summarise their functions.

Label
1. Nucleole
2. Chromatin network
3. Nuclear membrane
4. Nucleoplasm

Can you remember the main function of the nucleus?

Although the nucleus is the control centre of the cell, there are two other organelles that require closer investigation because of the important functions that they perform.

Plants engage in PHOTOSYNTHESIS and RESPIRATION. The organelles that are involved in this are the CHLOROPLAST (photosynthesis) and the MITOCHONDRION (respiration). You will be learning more about these organelles in future.

Your educator will show detailed sketches of these organelles to introduce them in greater detail.

Assessment: The identification of cellular structure

Were you able to distinguish the basic structures?

[ LO 2.1; LO 2.3]

Assignment 3:

Make simple line drawings of the organelles,

Which of the structures and aspects that form part of the plant cell would you not expect to come across in an animal cell? Supply reasons:

(Suggestion: Look at yourself and at a plant, and feel what you are like and what a plant is like.)

Assessment: Line drawings and deductions

Were you able to do the sketches and make deductions? [LO 2.3; LO 2.4]

By now, you probably understand that plant cells have particular characteristics but that they do not all look the same, because they are adapted to fulfil specific functions. These adaptations in their structure are referred to as DIFFERENTIATION and the accompanying change of function is known as SPECIALISATION . Both terms are important in cellular studies.

A group of cells that are adapted to perform a particular function is called a particular kind of TISSUE . Some conduct water through the plant. Other groups of cells are responsible for strengthening the plant. More, still, are adapted for photosynthesis.

Questions & Answers

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
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 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 9. OpenStax CNX. Sep 15, 2009 Download for free at http://cnx.org/content/col11069/1.1
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