Qcaa Study guides, Class notes & Summaries

QCAA ATAR Biology Questions and answers, rated A+ 10% - -Only ______ of the energy is transferred from one level to another. Energy is lost through: -heat -metabolic processes -waste (faeces) Abiotic factors - -Nonliving components of environment: -climate -temp -O2/CO2 conc -soli pH Abundance - -The number of individuals in each species acceleration phase - -When growth rate is faster because there are: -greater numbers of individuals to produce increasingly more offspring ac...

QCAA Biology Unit 3&4 Questions and answers, graded A+ Carrying Capacity definition - -the size of the population that can be supported undefinedly on the available resources and services of that ecosystem. Polygenetic Inheritance definition - -when one characteristics is controlled by 2 or more genes Keystone species definition - -a plant or animal that plays a unique and crucial role in the way an ecosystem functions gene definition - -region/s of DNA that are made up of nucleotides;...

QCAA ATAR BIOLOGY UNIT 3 Questions and answers, VERIFIED/ Ecosystems - -a biological community of interacting organisms and their physical environments Limiting factor - -any biotic or abiotic factor that restricts the existence of organisms in a specific environment. examples include: the amount of water, amount of food, temperature, amount of space and availability of mates Hierarchical classification - -Arranging things into groups according to their similarities from larger genera...

UNIT 3 - QCAA Exam questions and answers, rated A+ 3.1.1.a - recognise that biodiversity includes - -the diversity of species, habitats and ecosystems. 3.1.1.b - determine diversity of species using measures such as species evenness (relative species abundance) which is a measure of - -the population size of a particular species relative to the population size of other species within the community 3.1.1.b - determine diversity of species using measures such as species percentage cover w...

QCAA Cognitive Verbs Exam Studyguide ...

QCAA Biology Unit 1 and 2 Exam Questions and answers, rated A+ explain, using an example, how the arrangement of internal membranes can control biochemical processes - -- the inner membrane folds and creases itself to expand then amount of surface area it has - this is called the cristae - this means there is a greater area for enzymes to work and cause reactions explain how biochemical processes are controlled and regulated - -- enzymes are catalysts - enzymes are proteins folded and ...

QCAA Biology Unit 3 Exam Questions and answers, rated A+ What is biodiversity? - -The variety of living organisms in a particular habitat. Built from species, genetic diversity and an ecosystem. How do you determine diversity using species richness? - -Count the number of organisms that belong to the species. What is species evenness/species abundance? - -Amount of species within a particular area What is percentage cover? - -Area covered by a species. What is percentage frequency? - ...

QCAA Biology Unit 1 Questions and answers, rated A+ Macromolecules - -A very large organic molecule composed of many smaller molecules Four main types of macromolecules - -proteins, carbohydrates, lipids, nucleic acids Chemical composition of a carbohydrate - -C-H-O [Think C₆H₁₂O₆] Polymer - -A long molecule consisting of many similar or identical monomers linked together. Autotroph - -An organism that makes its own food Heterotroph - -An organism that obtains energy from the fo...

QCAA chemistry Unit 4 Topic 1: Properties and structure of organic materials, Questions and answers/ What are the two types of structural isomers? Positional isomer: Where a functional group is bonded at different locations on an organic molecule. Chain isomer: Where an organic molecule contains branching. A geometric isomer is a type of ______isomer Stereoisomer What is a geometric isomer? A molecule with the same structural formula but with different arrangement of atoms in space as...