Groups of organisms that can potentially interbreed to produce fertile
Males of species can display certain behaviour to show the female that
they are fit and that they are of the same species.
Most species have some meth
2.9 Outline (part 2)
Oxygen production in photosynthesis
One essential step is the splitting of molecules to release electrons needed in
+ 4 H
H 2 O 4 e
The reaction above is called photolysis:
o It only happens in light
o lysis mean
Monosaccharide monomers are linked by condensation reactions to form
disaccharides and polysaccharides.
Glucose, fructose, ribose are examples of monosaccharides, which can be
linked to make larger molecules.
Hydrogen bonding in water
Water molecules are polar and hydrogen bonds form between them.
Water molecules are formed between an oxygen atom and two hydrogen
atoms by covalent bonding.
Bonds between oxygen and hydrogens involve unequal shari
Molecular biology explains living processes in terms of the chemical substances
Discovery of DNA in 1953 revolutionized biology.
Structures of molecule are diverse and interactions complex, still
considered a new science.
Sources of finance
Cash flow statement
Trading, profit and loss account
8.3 Outline (part 2)
Reduction of NADP
NADP is produced in light-dependent reactions, it is needed in light-independent reactions.
NADP carries a pair of electrons that can be used to carry out reduction reactions (like NAP in
Development of the binomial system
The binomial system of names of species is universal among biologists
and have been agreed and developed at a series of congresses.
There are separate congresses for animals, for plant, fungi.
Sunlight and ecosystems
For most biological systems, the initial source of energy us sunlight. Living
organism can harvest this energy through photosynthesis, these
organisms include, plants, eukaryotic algae and cyanobacteria.
Nucleic acids and nucleotides
The nucleic acids DNA and RNA are polymers of nucleotides.
Nucleic acids were first discovered in material extracted from the nuclei of
cells. Nuclei acids are very large molecules that are constructed by linkin