Edexcel A level Biology UPDATED ACTUAL Exam Questions and CORRECT ANSWERS
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Course
Edexcel A level Biology
Institution
Edexcel A Level Biology
Edexcel A level Biology UPDATED
ACTUAL Exam Questions and CORRECT
ANSWERS
Molecular phylogeny - CORRECT ANSWER- It compares the structure of a particular
molecule from different organisms to discover their degree of evolutionary relation.
Somatic cell - CORRECT ANSWER- A cell in an organism...
Edexcel A level Biology UPDATED
ACTUAL Exam Questions and CORRECT
ANSWERS
Molecular phylogeny - CORRECT ANSWER✔✔- It compares the structure of a particular
molecule from different organisms to discover their degree of evolutionary relation.
Somatic cell - CORRECT ANSWER✔✔- A cell in an organism which isn't a gamete.
DNA - CORRECT ANSWER✔✔- Deoxyribose nucleic acid. Carries the genetic information
for cells and some viruses.
mRNA - CORRECT ANSWER✔✔- Messenger ribose nucleic acid (single stranded). The
product of transcription.
Speciation - CORRECT ANSWER✔✔- The process through which a species is created
Sympatric - CORRECT ANSWER✔✔- Due to reproductive isolation.
Allopatric - CORRECT ANSWER✔✔- Due to geographical isolation
Niche - CORRECT ANSWER✔✔- The role an an organism in an ecosystem.
Habitat - CORRECT ANSWER✔✔- The natural environment in which a species lives.
Biodiversity - CORRECT ANSWER✔✔- The diversity of plant and animal life in a
particular habitat
Ecosystem - CORRECT ANSWER✔✔- Organisms and their interactions with biotic and
abiotic factors.
, Carpentered world hypothesis - CORRECT ANSWER✔✔- People who live in a world with
many straight lines and right angles tend to interpret obtuse and acute angles as right angles.
Muller-Lyer Illusion - CORRECT ANSWER✔✔- An illusion where a man could be pointing
at two different objects, but depth cues let us know it is the object in the foreground he is
pointing to.
Inhibitory synapse - CORRECT ANSWER✔✔- These are synapses that make it less likely
that an action potential will happen in the post synaptic membrane.
Auxins - CORRECT ANSWER✔✔- Plant hormones that stimulate growth by causing cells
to elongate.
Indoleacetic acid (IAA) - CORRECT ANSWER✔✔- A specific type of auxin.
Summation - CORRECT ANSWER✔✔- When the effect of multiple impulses adds up.
Spatial summation - CORRECT ANSWER✔✔- Summation from many impulses from
different neurons.
Temporal summation - CORRECT ANSWER✔✔- Summation from multiple consecutive
impulses from a single neuron.
Excitatory synapse - CORRECT ANSWER✔✔- These synapses make the postsynaptic
membranes more permeable to sodium ions.
Synapse - CORRECT ANSWER✔✔- Where two neurones meet.
Synaptic cleft - CORRECT ANSWER✔✔- The gap in a synapse.
Nodes of Ranvier - CORRECT ANSWER✔✔- These are gaps in the myelin sheath where
depolarisation can occur.
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