Zadanie 3c
Root cells of species S contain 24 chromosomes. (i) State the chromosome number expected in its leaf cells. (ii) S and R can form fertile F₁ hybrids. Predict the diploid number in these hybrids and give a reason.
Diversity of organisms
Umiejętności w tym dziale
Umiejętności z tego działu sprawdza 27 zadań wzorowanych na arkuszach IB z lat 2022–2026. Dział pojawia się w 22 z 54 arkuszy w bazie.
Zadania z tego działu: 27 Otwórz w wyszukiwarce z filtrami
Zadanie 9
Inherited information is encoded in DNA and expressed in phenotypes. (a) Draw a DNA segment containing two base pairs. Label its nucleotide components and the interactions between the bases. (b) Describe how whole-genome sequencing can be used to infer…
Zadanie 21
A survey records Betula pendula, Quercus robur, Betula pubescens and Quercus petraea. What can be deduced from these names? A. All four plants belong to one species B. Betula pendula and Betula pubescens share a genus C. Quercus robur and Betula pendula share…
Zadanie 21
Researchers filter stream water and identify environmental DNA sequences. Which advantage can this offer over a visual survey? A. It proves the precise age of every organism present B. It can reveal an elusive species even when no individual is seen C. It…
Zadanie 22
Biologists filter pond water, extract DNA and compare short sequences with a reference barcode library. What can this procedure help them determine? A. Which species have left genetic material in the pond B. The age of every individual living in the pond C.…
Zadanie 1a
Identify the number of genera represented among the four named species.
Zadanie 1c
Humans have 46 chromosomes, while chimpanzees have 48. The simplified maps compare human chromosome 2 with chimpanzee chromosomes 2A and 2B. In the human chromosome, only one centromere-associated region functions as a centromere. Using the diagrams, justify…
- Materiał graficzny
Zadanie 21
Two wild populations of a sexually reproducing amphibian differ in colour pattern. Which observation most strongly supports classifying them as the same species under the biological species concept? A. They live in neighbouring valleys B. They use the same…
Zadanie 22
A short standardized DNA sequence from a river-water sample is compared with a reference library. What is this use of DNA barcoding designed to determine? A. The exact age of every fish B. Which organisms will necessarily survive next winter C. Which species…
Zadanie 7
A museum exhibit explores biological diversity from genetic sequences to infectious particles. (a) Explain how nucleic acids can encode a wide variety of base sequences. (b) Describe structural diversity among viruses, using named examples. (c) Suggest…