Zadanie 1a
State the mean annual decline in insect biomass.
- Materiał graficzny
Zadania wzorowane na pytaniach z tego arkusza: te same umiejętności, format i punktacja, inne dane i kontekst. Treści arkusza IB nie publikujemy.
W bazie 20 zadań z tego arkusza, razem 35 punktów, każde z kluczem i schematem punktowania. Najwięcej zadań sprawdza: Recording and interpreting biological data (5), Evaluating biological evidence and methods (3), Inferring inheritance from pedigrees (3).
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Dodaj cały arkusz do zestawuState the mean annual decline in insect biomass.
Compare and contrast the results for flies and grasshoppers.
Calculate the expected number of true-bug species remaining after one year from an initial 90 000 species, using the model mean decline.
Identify how many diets have a greater mass of sucrose consumed than of protein:lipid mixture.
Compare and contrast consumption on the 1:1 and 1:8 diets.
Calculate the mass of lipid consumed on the 4:1 diet.
Suggest a reason why less mixture is consumed at 20:1 than at 40:1.
State the relationship between high dietary lipid content and survival on day7.
Suggest, with a reason, which mixture is closest to a suitable natural diet.
Discuss whether these studies show that habitat loss can affect global bumblebee numbers.
The diagram represents part of a cell membrane. Annotate the diagram to show why phospholipids are amphipathic.
Draw a circle around the carboxyl group.
State one protein or peptide that functions as a hormone.
Draw the correct symbol and shading for X.
Calculate the probability that Y carries the variant allele.
Explain how the family group in box B excludes X-linked inheritance of this variant.
Explain how a single-base substitution can change a protein.
Identify X.
Outline how arrival of a signal stimulates neurotransmitter release.
Plants participate in energy flow and carbon cycling. (a) Outline energy flow through an ecosystem. (b) Describe how plants influence atmospheric carbon dioxide.
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