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Biology Unit B1 - Topic 1
Classification, variation and inheritance
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
Links
Demonstrate an understanding of how biologists classify organisms according to how closely they are related to one another including: a Species – groups of organisms that have many features in common b Genus – contains several species with similar characteristics c Family – comprising of several genera d Order – comprising of several families e Class – comprising of several orders f Phylum – comprising of several classes g The Five Kingdoms – animalia, plantae, fungi, protoctista and prokaryotes
Describe the main characteristics of the five kingdoms including: a Animalia – multicellular, do not have cell walls, do not have chlorophyll, feed heterotrophically b Plantae – multicellular, have cell walls, have chlorophyll, feed autotroprically c Fungi – multicellular, have cell walls, do not have chlorophyll, feed saprophytically d Protoctista – unicellular, have a nucleus e Prokaryotes – unicellular, have no nucleus
Explain why scientists do not classify viruses in any of the five kingdoms and regard them as non-living
Describe the main characteristics of the phylum
Chordata as animals with a supporting rod running the length of the body, an example of this being the backbone in vertebrates
Explain how scientists place vertebrates into groups based on: a Oxygen absorption methods – lungs, gills and skin b Reproduction – internal or external fertilisation, oviparous or viviparous c Thermoregulation – homeotherms and poikilotherms
Demonstrate an understanding of the problems associated with assigning vertebrates to a specific group based on their anatomy and reproduction methods and why many vertebrates are difficult to classify Discuss why the definition of a species as organisms that produce fertile offspring may have limitations:
some
Biology Unit B1 - Topic 1
Classification, variation and inheritance
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
Links
Demonstrate an understanding of how biologists classify organisms according to how closely they are related to one another including: a Species – groups of organisms that have many features in common b Genus – contains several species with similar characteristics c Family – comprising of several genera d Order – comprising of several families e Class – comprising of several orders f Phylum – comprising of several classes g The Five Kingdoms – animalia, plantae, fungi, protoctista and prokaryotes
Describe the main characteristics of the five kingdoms including: a Animalia – multicellular, do not have cell walls, do not have chlorophyll, feed heterotrophically b Plantae – multicellular, have cell walls, have chlorophyll, feed autotroprically c Fungi – multicellular, have cell walls, do not have chlorophyll, feed saprophytically d Protoctista – unicellular, have a nucleus e Prokaryotes – unicellular, have no nucleus
Explain why scientists do not classify viruses in any of the five kingdoms and regard them as non-living
Describe the main characteristics of the phylum
Chordata as animals with a supporting rod running the length of the body, an example of this being the backbone in vertebrates
Explain how scientists place vertebrates into groups based on: a Oxygen absorption methods – lungs, gills and skin b Reproduction – internal or external fertilisation, oviparous or viviparous c Thermoregulation – homeotherms and poikilotherms
Demonstrate an understanding of the problems associated with assigning vertebrates to a specific group based on their anatomy and reproduction methods and why many vertebrates are difficult to classify Discuss why the definition of a species as organisms that produce fertile offspring may have limitations:
some