Summary IGCSE/GCSE Biology Edexcel Revision Notes PDF - Section 1 - The nature and variety of living organisms
5 views 0 purchase
Course
Biology
Institution
GCSE
IGCSE/GCSE Biology Edexcel Revision Notes PDF - Section 1 - The nature and variety of living organisms. Includes deatiled and comprehensive revision notes on the first topic from the Biology 9-1 Edexcel specification.
Characteristics of Living Organisms
● Living organisms show a range of characteristics that distinguish them from dead of
non-living material
● The life processes are supported by the cells, tissues, organs and systems of the body
The 8 Characteristics of Life - MRS H. GREN
Movement
An action by an organism or part of an organism causing a change of position or place.
- Animals can move their entire bodies, whereas plants move parts of their body in response
to external stimuli such as light
Respiration
The chemical reactions that take place in living cells to release energy from nutrients. This energy
is used for all chemical reactions that keep the body alive.
Sensitivity
The ability to detect and respond to changes in their external or internal conditions (stimuli)
Homeostasis
The control of internal conditions to provide the best conditions inside cells for all the reactions
needed for life to exist.
- E.g. our bodies control how much water is absorbed and removed from the blood, so cell
processes can work efficiently
- E.g. internal body temperatures for enzyme reactions to work efficiently
Growth
This is the permanent increase in the size of cells or the whole body of an organism
Reproduction
All the processes of producing more offspring of the same kind of organism to survive
Excretion
The removal from organisms of toxic waste products.
- E.g. animals cannot use C02 produced during respiration.
Nutrition
The taking of nutrients, such as organic substances and mineral ions, into the body. Nutrients are
the raw materials that cells need to release energy and to make more cells
- E.g. animals eat other organisms - heterotrophic (different feeding)
- E.g. plants use photosynthesis - autotrophic (self feeding)
Questions - page 11
1. For each of the 8 characteristic, give one example for:
a. A human
b. An animal
c. A plant
2. For each of the eight characteristic, explain why they are essential to a living organism
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller abbiestuart. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.84. You're not tied to anything after your purchase.
