Concept and use of a classification system

A student investigated four different microorganisms. She recorded whether each microorganism contained a nucleus, chloroplasts and cytoplasm. She then prepared the table below to help identify them. Which organisms are Q, R and S?

May/June 2015

The diagram illustrates several features of different organisms. What do areas X and Y stand for?

May/June 2017

Which term accurately identifies the malarial pathogen?

May/June 2018

The picture shows an arthropod. By following the key, which option correctly identifies the arthropod shown? Key: 1 has wings $\rightarrow$ go to 2 does not have wings $\rightarrow$ A 2 has 2 body parts $\rightarrow$ B has 3 body parts $\rightarrow$ go to 3 3 has 6 legs $\rightarrow$ C has 8 legs $\rightarrow$ D

May/June 2023

Meerkats are small mammals that inhabit deserts, which are dry, open habitats. Desert conditions are very hot in the daytime but cold at night. Meerkats are carnivores that look for food in daylight.

May/June 2023

A previously unknown organism is found. It has DNA within a cellular structure. Which group of organisms might it belong to, and which group might it not belong to?

May/June 2024

Organisms can be sorted into groups by the features they have in common.

May/June 2024

Fig. 2.1 contains four arthropods.

May/June 2024

A newly found small vertebrate with lungs is classified as a reptile. In the key, which vertebrate is a reptile?

May/June 2025

The diagram shows one species of arthropod. To which arthropod group does this species belong?

May/June 2025

Rhizomucor pusillus is a fungus that occurs in heaps of dead plant vegetation. Its optimum growth rate lies between $60\,^{\circ}\text{C}$ and $70\,^{\circ}\text{C}$.

May/June 2025

A newly found organism is discovered. It has DNA within a cellular structure. Which group of organisms might it belong to, and which group of organisms could it not belong to?

Oct/Nov 2016

Which organisms in this list count as microorganisms?

Oct/Nov 2019

The table presents some characteristics of three kinds of microorganism. Which row correctly matches each type of microorganism?

Oct/Nov 2022

Bacteria, fungi and viruses are frequently classified together as microorganisms. Which statement about microorganisms is correct?

Oct/Nov 2022

Which statement gives the definition of a species?

Oct/Nov 2023

The wobbegong, also called the carpet shark, is a shark species that spends its time lying on the seabed. There are twelve species of wobbegong. The biggest one is Orectolobus maculatus, the spotted wobbegong, which grows to about three metres long. What is the genus name of the biggest wobbegong?

Oct/Nov 2024

Scientific names of species are formed from two parts. What is the naming system called?

Oct/Nov 2024

Use the dichotomous key in Fig. 1.1 to work out the five main vertebrate groups, A, B, C, D and E. Fill in Table 1.1.

Oct/Nov 2024

Fig. 3.1 contains photographs of a male and a female insect from the same species. Both insects are green.

Oct/Nov 2024

The international system used to name organisms is the binomial system. Which two parts make up the scientific name?

Oct/Nov 2025

A student has sketched six different arthropods that live in woodland. When making a dichotomous key, which question could be used to distinguish arthropods 2, 5 and 6 from arthropods 1, 3 and 4?

Oct/Nov 2025