Download B1 Biology Summary Topic 1 (RP)

Keywords: variation, adaptation, Kingdom, characteristics, species, fertile, hybrid.
B1 Topic 1Classification, Variation and Inheritance
This topic looks at:: Classification, vertebrates and invertebrates, species, variation, reasons for variety, evolution, genes, explaining inheritance, genetic disorders.
List the 5 main groups of invertebrates.
Give the features of the five kingdoms of
organisms.
Describe how you would tell the difference
between a plant and a fungus.
Describe what we mean by variation in a species.
Give two problems with classifying a
group of organisms as a species.
Problem one...
Match each word to its correct definition.
Definitions
Oviparous
Controlled body temperature
Viviparous
Lays eggs
Poikilotherm
Live births
homeotherm
Varying body temperature
Problem two...
Keywords: fertilisation, oxygen, reproduction, thermoregulation, absorption. Chordata,
List the seven
classification groups
of organisms in order,
stating with the
largest.
Viruses are not classified
in a kingdom. Explain
why.
Keywords: adapted, distribution curve, genetic variation. Environmental, variation.
Give two extreme environmental conditions in deep-sea hydrothermal vents and
B1 Topic Classification, Variation and Inheritance
•l
give an adaptation the Pompii worm has to live there.
Describe how you would tell the difference
between a protoctist and a prokaryote. .
Variation
When a characteristic only occurs in distinct forms,
it show continuous /discontinuous variation
Human blood group is an example of continuous/discontinuous variation.
Discontinuous variation is caused by genes only/by genes and the environment.
Give two problems with classifying a group of organisms as a species
Problem one
How do scientists share new discoveries with other scientists?
Problem two
Bats and birds are vertebrates with wings, but they are classified in different
vertebrate groups. Use these examples to help explain why it is sometimes difficult
to classify vertebrates.
Describe the four ways that scientists sort vertebrates into main
groups.
Keywords: eggs, temperature, live births, varying, backbones, gills, internal, lungs, internal, external, classified,
Keywords: overproduction, evolution, advantageous, survival, struggle, existence, DNA.
B1 Topic Classification, Variation and Inheritance
Artic foxes have thick fur and are white in winter. Explain how these
characteristics are adaptations to the environment.
Explain what an identification key is used for
Construct a key to identify the following four animals:
elephant, dog, dolphin and human.
Darwin’s Theory
Give two sources of evolution by natural selection.
Define the terms
a) Natural selection
Name two extreme environmental conditions that occur near deep-sea
hydrothermal vents.
1.
2.
a) evolution
Choose the correct words to make these sentences correct.
When a characteristics only occurs in distinct forms,
it shows continuous/discontinuous variation.
Human blood group is an example of continuous/discontinuous variation.
Discontinuous variation is caused by genes only/by genes and the
environment.
Keywords: adapted, genes, extreme, polar, hydrothermal, high pressure, oxygen, acidic, pressure,
Keywords: gene, homozygous, heterozygous monohybrid, inheritance, recessive, allele,
B1 Topic 1Classification, Variation and Inheritance
Write down the meaning of the following words...
a) Allele
Explaining Inheritance.
Genotype for blue
eyes is .......
Coat colour is inherited in rabbits by one gene. The dominant allele for this gene
(B) gives a brown coat colour. The recessive allele (b) gives a black coat.
Phenotype tells us ..
a) Write down the genotype and phenotype for a rabbit that is heterozygous
for coat colour.
b) Gene
A pea plant has a recessive allele for white flower colour and a dominant
allele for purple flower colour.
b) B) Complete the Punnett square to show the possible offspring form two
heterozygous parents.
C) Write down the ratios of possible
genotypes and phenotypes of the offspring.
a) Identify if the plant is homozygous for heterozygous for flower colour
and explain your answer.
Heterozygous or homozygous?
Reason why..
Genetic Disorders
Family Pedigrees.
Describe sickle cell disease
Explain what a pedigree
diagram is, what it shows and
how the are used .
b) State whether the plant will have purple or white flowers.
Purple or white?
Reason why...
Cystic Fibrosis
Describe the symptoms of cystic fibrosis.
Keywords: genotype, phenotype, dominant, recessive, gene, chromosomes, nucleus, alternative, offspring, gametes.