GCSE AQA Biology Paper two
, "Natural Selection - CORRECT ANSWER A theory for evolution put forward by natural
selection. It is where species have naturally evolved over time in order to survive:
1) there is a struggle for existence.
2) more organisms are born that can survive.
3) the ones that survive breed and pass on their characteristics to their offspring.
4) over long periods of time the characteristics of the population change."
"Reasons Why Darwin's Theory for Evolution Took Along Time for People to Accept. -
CORRECT ANSWER - it challenged Christianity.
- there was little evidence at the time.
- inheritance and variation were discovered 50 years later."
"Darwin's Theory of Evolution - CORRECT ANSWER Those individuals that are best
adapted to the environment will survive and reproduce; those traits that help them,
become more common in a species and maladaptive traits die out. This is called natural
Selection."
"Lamarck's Theory About Giraffes - CORRECT ANSWER They have longer necks
because they were constantly stretching to reach food off the trees. They then passed
this characteristic onto the next generation."
"Different Fossil Formations - CORRECT ANSWER - hard parts of animals have not
decayed.
- parts of animals have not decayed as conditions needed were absent.
- parts of organisms are replaced by other materials as they decay.
- as preserves traces. E.g. footprints."
"Reasons why there is a Gap in the Fossil Record - CORRECT ANSWER - many early
forms of life were soft bodied so they leave behind few traces.
- traces may have been destroyed by geological activity."
"Selective Breeding - CORRECT ANSWER The process of selecting a few organisms
with desired traits and characteristics then breeding them together to form offspring with
these features."
"Genetic Engineering - CORRECT ANSWER This involves changing the characteristics
of an organism by introducing a new gene:
1) enzymes are used to isolate the required gene.
2) the gene is inserted into a vector.
3) the vector is used to insert the gene into the require cells."
"Genetically Modified Crops - CORRECT ANSWER Crops that have been modified for
desired characteristics using genetic engineering. E.g. to increasing fruit productivity, or
to become resistant to diseases, etc."
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, "Natural Selection - CORRECT ANSWER A theory for evolution put forward by natural
selection. It is where species have naturally evolved over time in order to survive:
1) there is a struggle for existence.
2) more organisms are born that can survive.
3) the ones that survive breed and pass on their characteristics to their offspring.
4) over long periods of time the characteristics of the population change."
"Reasons Why Darwin's Theory for Evolution Took Along Time for People to Accept. -
CORRECT ANSWER - it challenged Christianity.
- there was little evidence at the time.
- inheritance and variation were discovered 50 years later."
"Darwin's Theory of Evolution - CORRECT ANSWER Those individuals that are best
adapted to the environment will survive and reproduce; those traits that help them,
become more common in a species and maladaptive traits die out. This is called natural
Selection."
"Lamarck's Theory About Giraffes - CORRECT ANSWER They have longer necks
because they were constantly stretching to reach food off the trees. They then passed
this characteristic onto the next generation."
"Different Fossil Formations - CORRECT ANSWER - hard parts of animals have not
decayed.
- parts of animals have not decayed as conditions needed were absent.
- parts of organisms are replaced by other materials as they decay.
- as preserves traces. E.g. footprints."
"Reasons why there is a Gap in the Fossil Record - CORRECT ANSWER - many early
forms of life were soft bodied so they leave behind few traces.
- traces may have been destroyed by geological activity."
"Selective Breeding - CORRECT ANSWER The process of selecting a few organisms
with desired traits and characteristics then breeding them together to form offspring with
these features."
"Genetic Engineering - CORRECT ANSWER This involves changing the characteristics
of an organism by introducing a new gene:
1) enzymes are used to isolate the required gene.
2) the gene is inserted into a vector.
3) the vector is used to insert the gene into the require cells."
"Genetically Modified Crops - CORRECT ANSWER Crops that have been modified for
desired characteristics using genetic engineering. E.g. to increasing fruit productivity, or
to become resistant to diseases, etc."
1|Page
