Summary
Summary LIFE SCIENCE GLOSSARY - assists in Biology Learning
Every section in the matric syllabus contextualized in glossary words and definitions. Extremely useful in exams and tests, and to understanding sections fully
[Show more]
Seller
Follow
Content preview
Bio GlossaryGrade 12 Syllabus
1.
Biosphere- part of the earth where living organisms are found.
Ecosystem- made up of groups of different species of organisms that interact with each other with the
environment
Organism- individual form of life, composed of a single cell or complex cells that are capable of
growing and reproducing (bacterium, fungus, animal, plant)
Community- group of different species that inhabit and interact in a particular area.
Species- a group of closely related organisms that are capable of interbreeding and producing fertile
offspring.
Individual- a single organism capable of independent existence.
Population- a group of organisms of the same species that occupy the same area and can breed freely.
Demographics (of population)- the statistics such as the size, age distribution, growth rate, density of
populations.
Natality- birth rate in animals or the production of seeds in plants.
Mortality- death rate.
Immigration- individuals move into a population and do not stay.
Emigration- individuals leave a population and do not return.
Exponential- increasing more and more rapidly.
Environmental resistance- the total number of factors that stop a population from reproducing at its
maximum rate.
Carrying capacity- the population density that the environment can support.
Aerobic- needs oxygen.
Sterile- contains no bacteria.
Nutrient- food.
Ecological niche- all the conditions necessary for an organism to survive and reproduce.
Specialization- the structural and behavioral adaptations that enable individuals of different species to
co-exist.
, Mob- to surround and overpower.
Social organization- structure of relationships within a group.
Eusocial- species that exhibit the highest level of social organization.
Age structure- the relative numbers of individuals of each age in a population.
Biocapacity- the amount of productive land and water available to produce the resources we use and to
absorb the waste we produce.
Sustainable development- the development that meets the needs of the present while not compromising
the needs of future generations.
2.1
Endocrine glands- a variety of hormones secreted from this special glands or tissue.
Hormone- an organic chemical substance (carbon hydrogen, oxygen), usually a protein, can be a
steroid. Secreted by an endocrine gland, carried via blood to target organs, regulates metabolic
reactions. Broken down by enzymes, do not last long in the body.
Target organs- the hormones only affect these certain cells, they have receptor sites for that hormone
and respond to it. “Target tissue or target organs” they can be a single gland or organ or scattered
throughout the body.
Vascular- richly supplied with blood vessels.
ADH- anti-diuretic hormones.
TSH- thyroid stimulating hormone.
LH- luteinizing hormone.
Prolactin- stimulates milk production.
ACTH- Adrenocorticotropic hormone.
ICSH- Interstitial cell stimulating hormone.
GH/ STH- Growth hormone/ Somatotrophic hormone.
Hypersecretion- over secretion of a hormone.
Hyposecretion- under secretion of a hormone.
Corpus- body.
Goitre- swollen thyroid.
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller erinmester. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R140,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now