Variation and selection — IGCSE Sciences - Co-Ordinated (0973) questions by topic
Variation and selection questions track antibiotic introduction dates against resistance reports, identify which process produces antibiotic-resistant bacteria, classify fingerprint shapes into discrete categories, and complete sentences on discontinuous pea-seed colour inheritance, worth from 1 to 11 marks in this IGCSE Co-ordinated Sciences set.
State, identify, complete and describe lead the command words, with define also common: describe natural selection as a process acting over time, not a single event. 11 real questions from 2023 to 2025 papers make up this page. Submit each attempt for instant marking to check discontinuous variation is distinguished correctly from continuous variation.
May–June 2025, Paper 11
Which graph represents variation in the height of humans? Each graph plots number of individuals (y-axis) against height (x-axis). Graph A shows a smooth bell-shaped (normal)…
Answer this question and get it marked →May–June 2025, Paper 21
The table shows the dates that different antibiotics were introduced and the dates that antibiotic-resistant bacteria were first reported. antibiotic date introduced date…
Answer this question and get it marked →May–June 2025, Paper 32
Pea plants produce seeds. The seeds are either green or yellow. Complete the sentences about pea plants. Use words from the list. asexual continuous discontinuous genotypes…
Answer this question and get it marked →May–June 2025, Paper 42
Orcas are large mammals that live in the sea. Orcas reproduce using egg cells and sperm cells like humans. Describe two adaptive features of egg cells.
Answer this question and get it marked →The explosion of a supernova forms a nebula. State what may form from this nebula.
Answer this question and get it marked →May–June 2024, Paper 11
The graph shows the masses of samples of two different types of potato, Y and Z (both with bell-shaped distributions of mass). [Graph: number of potatoes vs mass/g for types Y and…
Answer this question and get it marked →May–June 2023, Paper 12
Fingerprints are classified by their shape. A class of students identified the type of fingerprint they have on the thumb of their left hand. The chart shows the results as…
Answer this question and get it marked →May–June 2023, Paper 22
Which process results in the development of strains of antibiotic-resistant bacteria? A artificial selection B discontinuous variation C natural selection D selective breeding
Answer this question and get it marked →May–June 2023, Paper 32
A school investigates variation in one class. Define the term variation.
Answer this question and get it marked →May–June 2023, Paper 41
Fig. 7.1 is a diagram showing the development of a strain of antibiotic resistant bacteria (stage 1 antibiotic given, stage 2; key: non-resistant, resistant and dead bacteria).…
Answer this question and get it marked →October–November 2023, Paper 11
Continuous variation is defined as a ...(1)... of phenotypes ...(2)... . Which words correctly complete gaps 1 and 2? A 1 limited number, 2 between two extremes B 1 limited…
Answer this question and get it marked →Other IGCSE Sciences - Co-Ordinated topics
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