| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.HL.TZ2.18 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Identify | Question number | 18 | Adapted from | N/A |
Question
What promotes natural selection?
I. Overpopulation
II. Competition
III. Variation
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Markscheme
D
Examiners report
This was a good discriminator. Many of the weaker candidates failed to realise that overpopulation also promotes natural selection.
Syllabus sections
Show 67 related questions
- 17N.1.SL.TZ0.21: What causes variation within a population? A. Fertilization and change in the...
- 16N.2.HL.TZ0.4b: Describe how variation contributes to evolution by natural selection.
- 16N.1.SL.TZ0.21: What is the major contributor to the increase in antibiotic resistance in bacteria? A....
- 16N.1.SL.TZ0.19: Lichens are returning to the forests of the industrial areas of the United Kingdom due to...
- 16M.1.HL.TZ0.32: How can species of bacteria evolve to be resistant to antibiotics? I. A variation within one...
- 16M.1.SL.TZ0.22: Which process promotes variation in a population? A. MutationB. MitosisC. Ageing in a...
- 15M.2.SL.TZ1.5c: Explain the evolution of antibiotic resistance in bacteria.
- 15N.1.SL.TZ0.23: Darwin described evolution as “descent with modification”. What would make evolution less...
- 15N.2.SL.TZ0.5c: Explain how evolution may happen in response to an environmental change.
- 15N.3.SL.TZ0.10a: State the infant mass relative to mother mass of Homo sapiens.
- 15N.3.SL.TZ0.10b: Outline the difference in infant mass relative to mother mass in extinct hominids and modern...
- 15N.3.SL.TZ0.10c: Suggest a hypothesis, based on evidence in the data, for when the shift to giving birth to...
- 15N.3.SL.TZ0.10d: Suggest one disadvantage of infants being born with a relatively large size in humans.
- 13M.2.HL.TZ1.7c: Explain two examples of evolution in response to an environmental change.
- 13M.2.SL.TZ2.3b: Outline how overpopulation of a species in a given environment may lead to evolution.
- 13N.1.SL.TZ0.20: What causes heritable variation in a species? I. Muscle development through exerciseII....
- 13N.2.SL.TZ0.6b: Explain the various possible consequences of overproduction of offspring.
- 13M.1.SL.TZ1.22: The long-term exposure of bacteria to antibiotics has led to the spread of resistant...
- 11M.3.HL.TZ2.1a (i): Determine the greatest genetic distance between any pair of colonies of V. squamosa.
- 11M.3.HL.TZ2.1a (ii): Identify the greatest geographic distance between any pair of colonies of V. maculifrons.
- 11M.3.HL.TZ2.1b: Describe the relationship between the geographic distance and genetic distance in the two...
- 11M.3.HL.TZ2.1c: Compare the two species in terms of genetic distance between the pairs of colonies.
- 12M.1.HL.TZ2.18: What type of process causes antibiotic resistance to develop in bacteria? A. Competition...
- 12M.3.HL.TZ2.1b: Suggest one feature of butterfly wings that might help a butterfly to escape from a predator.
- 12M.3.HL.TZ2.1c (ii): The graph shows that distasteful butterflies tend to have a lower ability to escape from...
- 12M.3.HL.TZ2.1a: State which butterfly (sub)family contains the species with the greatest escaping ability.
- 12M.3.HL.TZ2.1c (i): Explain how the ability of a butterfly to escape from predators could increase by natural...
- 12M.1.SL.TZ2.22: What type of process causes antibiotic resistance to develop in bacteria? A. Competition...
- 12M.2.SL.TZ1.4c: Explain how sexual reproduction promotes variation in a species.
- 09M.2.HL.TZ1.7a: Outline how antibiotic resistance in bacteria can arise in response to environmental change.
- 09M.1.HL.TZ1.17: What is the mechanism of natural selection? A. Any individuals in a population can be...
- 09M.2.SL.TZ2.6b: Describe how natural selection leads to evolution.
- 09M.1.SL.TZ2.21: Which process tends to reduce variety within a population? A. Natural selectionB. Random...
- 10M.2.HL.TZ2.8c: Antibiotic resistance in bacteria is an example of evolution in response to environmental...
- 10M.2.SL.TZ2.6b: Explain how sexual reproduction can eventually lead to evolution in offspring.
- 10M.3.HL.TZ1.1b (i): Compare the data for wing size of D. subobscura in North and South America with wing size in...
- 10M.3.HL.TZ1.1b (ii): Suggest one reason for the differences.
- 10M.3.HL.TZ1.1c: Predict, with a reason, what might happen to D. subobscura in the future as a result of its...
- 10M.3.HL.TZ1.1a: Identify the relationship between wing size and latitude shown by D. subobscura in Europe.
- 09N.1.SL.TZ0.21: Charles Darwin used domesticated animals to provide evidence for evolution by natural...
- 11N.3.HL.TZ0.1a: State the year in which G. fortis had the greatest change in relative beak size.
- 11N.3.HL.TZ0.1b: Compare the trends in relative beak size of G. fortis and G. scandens.
- 11N.3.HL.TZ0.1c: Outline possible reasons for the trends in relative beak size in finches.
- 12N.2.SL.TZ0.4a: The correlation shown in the data above can be explained by natural selection. Outline how...
- 10N.3.SL.TZ0.16d: Suggest how antibiotic-resistant bacteria are passed from animals to humans.
- 10N.3.SL.TZ0.16b: Compare the incidence of drug resistance in bacteria from chickens and egg laying hens.
- 10N.3.SL.TZ0.16a: Calculate the percentage risk of bacteria becoming resistant to more than five kinds of...
- 10N.3.SL.TZ0.16c: Discuss the hypothesis that giving antibiotics increases antibiotic resistance in poultry...
- 09N.3.HL.TZ0.1b: Suggest, giving a reason, the expected trend in the proboscis length of the soapberry bug in...
- 09N.3.HL.TZ0.4a(i): State the effect of the presence of the helpers on mean chick mass.
- 09N.3.HL.TZ0.1a(i): Outline the trends in proboscis length in soapberry bugs shown in the graph.
- 09N.3.HL.TZ0.4b: Calculate the percentage decrease in mean egg volume found in the presence of helpers as...
- 09N.3.HL.TZ0.4c: With reference to the data, suggest why the activity of the helper affects the probability of...
- 10N.3.HL.TZ0.7b: Compare the incidence of drug resistance in bacteria from chickens and egg laying hens.
- 10N.3.HL.TZ0.7d: Suggest how antibiotic-resistant bacteria are passed from animals to humans.
- 10N.3.HL.TZ0.7a: Calculate the percentage risk of bacteria becoming resistant to more than five kinds of...
- 10N.3.HL.TZ0.7c: Discuss the hypothesis that giving antibiotics increases antibiotic resistance in poultry...
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 17M.2.SL.TZ2.4b.ii: Some lice live in human hair and feed on blood. Shampoos that kill lice have been available...
- 17M.2.SL.TZ1.4b.ii: Suggest one type of additional evidence that could provide strong support for Turtles 3 as...
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.1.HL.TZ2.28: The photograph shows vegetation in a rocky area. Which characteristic of the plants...
- 17M.1.HL.TZ1.17: A bacterial population with no resistance to an antibiotic may develop into a bacterial...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive...
- 17M.1.SL.TZ2.21: What is a direct consequence of the overproduction of offspring? A. Individuals become more...
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 17M.1.SL.TZ1.20: A bacterial population with no resistance to an antibiotic may develop into a bacterial...
