Discuss how DNA sequence data can show evolutionary relationships between species
Discuss how DNA sequence data can show evolutionary relationships between species
1 Answer
Questions and Answers
Outline the theory of evolution as a process leading to the formation of new species from pre-existing species over time, as a result of changes to gene pools from generation to generation
Outline the theory of evolution as a process leading to the formation of new species from pre-existing species over time, as a result of changes to gene pools from generation to generation
1 Answer
Outline the following examples of selective breeding: • the introduction of disease resistance to varieties of wheat and rice • inbreeding and hybridisation to produce vigorous, uniform varieties of maize • improving the milk yield of dairy cattle
Outline the following examples of selective breeding: • the introduction of disease resistance to varieties of wheat and rice • inbreeding and hybridisation to produce vigorous, uniform varieties of maize • improving the milk yield of dairy cattle
1 Answer
Describe the principles of selective breeding (artificial selection)
Describe the principles of selective breeding (artificial selection)
1 Answer
Use the Hardy–Weinberg principle to calculate allele and genotype frequencies in populations and state the conditions when this principle can be applied (the two equations for the Hardy–Weinberg principle will be provided, as shown in the Mathematical requirements)
Use the Hardy–Weinberg principle to calculate allele and genotype frequencies in populations and state the conditions when this principle can be applied (the two equations for the Hardy–Weinberg principle will be provided, as shown in the Mathematical requirements)
1 Answer
Outline how bacteria become resistant to antibiotics as an example of natural selection
Outline how bacteria become resistant to antibiotics as an example of natural selection
1 Answer
Explain how selection, the founder effect and genetic drift, including the bottleneck effect, may affect allele frequencies in populations
Explain how selection, the founder effect and genetic drift, including the bottleneck effect, may affect allele frequencies in populations
1 Answer
Explain how environmental factors can act as stabilising, disruptive and directional forces of natural selection
Explain how environmental factors can act as stabilising, disruptive and directional forces of natural selection
1 Answer
How does natural selection lead to adaptation in populations?
How does natural selection lead to adaptation in populations?
1 Answer
Explain that natural selection occurs because populations have the capacity to produce many offspring that compete for resources; in the ‘struggle for existence’, individuals that are best adapted are most likely to survive to reproduce and pass on their alleles to the next generation
Explain that natural selection occurs because populations have the capacity to produce many offspring that compete for resources; in the ‘struggle for existence’, individuals that are best adapted are most likely to survive to reproduce and pass on their alleles to the next generation
1 Answer
Quiz Leaderboard
1st
Sourav
Score: 90%
Questions: 20
2nd
Priyanka
Score: 90%
Questions: 10
3rd
Vesnce
Score: 45%
Questions: 20
4th
Hector
Score: 40%
Questions: 10
Total Questions 2747
Top Questions
-
Discuss the advantages and disadvantages of genetically modifying crops, including soya, maize and rice
Genetically modified (GM) crops, such as soybeans, maize, and rice,
Sourav
-
Outline the process of genetic modification using bacterial production of a human protein as an example, limited to: (a) isolation of the DNA making up a human gene using restriction enzymes, forming sticky ends (b) cutting of bacterial plasmid DNA with the same restriction enzymes, forming complementary sticky ends (c) insertion of human DNA into bacterial plasmid DNA using DNA ligase to form a recombinant plasmid (d) insertion of recombinant plasmids into bacteria (specific details are not required) (e) multiplication of bacteria containing recombinant plasmids (f) expression in bacteria of the human gene to make the human protein
<h2 class="mb-2 mt-6 text-lg first:mt-3">Process of Genetic Modification Using Bacterial
-
Outline examples of genetic modification: (a) the insertion of human genes into bacteria to produce human proteins (b) the insertion of genes into crop plants to confer resistance to herbicides (c) the insertion of genes into crop plants to confer resistance to insect pests (d) the insertion of genes into crop plants to improve nutritional qualities
<h2 class="mb-2 mt-6 text-lg first:mt-3">Examples of Genetic Modification</h2> Genetic modification involves
-
Describe genetic modification as changing the genetic material of an organism by removing, changing or inserting individual genes
Genetic modification (GM) refers to the deliberate alteration of an
-
Describe and explain the conditions that need to be controlled in a fermenter, including: temperature, pH, oxygen, nutrient supply and waste products
<h2 class="mb-2 mt-6 text-lg first:mt-3">Conditions to Control in a Fermenter</h2> Fermenters
-
Describe how fermenters can be used for the large-scale production of useful products by bacteria and fungi, including insulin, penicillin and mycoprotein
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Fermenters for Large-Scale
-
Explain the use of lactase to produce lactosefree milk
<h2 class="mb-2 mt-6 text-lg first:mt-3">The Use of Lactase to Produce
- All Questions