AQA A Level Biology復習筆記5.4.1 Nutrient Cycles
Nutrient Cycles Living organisms require?nutrients?from their?environments?for?growth?and other processes (e.g. reproduction) These nutrients are then?returned?to the environment when organisms pro...
AQA A Level Biology復習筆記5.3.1 Primary Producers
Plants are Primary Producers An?ecosystem?in a?particular area?includes: All the?living?components (i.e.?biotic factors?such as organisms and their interactions) All the?non-living?components (i.e....
AQA A Level Biology復習筆記5.2.1 Mitochondria & the Need for Energy
Structure & Function of the Mitochondria Mitochondria are rod-shaped organelles 0.5 - 1.0 μm in diameter They are the site of aerobic respiration in eukaryotic cells The function of mitochondri...
AQA A Level Biology復習筆記5.1.1 Chloroplast Structures & their Functions
Chloroplast Structures & their Functions Chloroplasts are the?organelles?in plant cells where?photosynthesis?occurs Each chloroplast is surrounded by a?double-membrane envelope Each of the enve...
AQA A Level Biology復習筆記4.6.1 Biodiversity Within a Community
Biodiversity Biodiversity can be thought of as a study of all the?variation?that exists within and between all forms of life Biodiversity looks at the range and variety of genes, species and habita...
AQA A Level Biology復習筆記4.5.1 Courtship
Courtship Organisms belong to the?same species?if they interbreed in their natural habitat to produce?fertile offspring The process of successful interbreeding or mating is preceded by some form of...
AQA A Level Biology復習筆記4.4.1 Genetic Diversity
Genetic Diversity Organisms of the same species have very similar genomes, but two individuals (even twins) will have differences between their DNA base sequences Considering the size of genomes, t...
AQA A Level Biology復習筆記4.3.1 Genetic Mutations
Genetic Mutations A?gene mutation?is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur?continuously As the DNA base sequence determi...
AQA A Level Biology復習筆記4.2.1 The Genome
The Genome A gene is a length of DNA that codes for a polypeptide/protein A?genome?is the complete set of?genes?present in a cell The full genome is present within every cell of an organism, but no...
