GCSE AQA Combined Science Trilogy Biology Paper 2

[question number = 01.1] Use some of the following words to fill in the blanks:
Gene, allele, sugar, oxide, phosphate

[question number = 01.2] Drag and drop to match the base pairs in DNA

(short answer) [question number = 01.3] What is a gene and what is its primary function

[question number = 01.4] Which term do we use to describe the entire DNA of an individual?

[question number = 02.1] Drag and drop to match the role and structure

[question number = 02.2] Choose the correct set of sex chromosomes to fill in this genetic diagram (genetic cross).

(short answer) [question number = 02.3] Selective breeding has been used in the past to change the behaviour of domestic animals such as dogs. A farmer is having persistent issues with goats escaping from their pens. Goats are very good at escaping because they can climb and jump over fences. A farmer decides that enough is enough and they will selectively breed the goats to change their behaviour. Describe the process the farmer should carry out in order to change the behaviour of the goats using selective breeding.

[question number = 02.4] Put the following steps in order to describe how genetic engineering of bacteria can be carried out to produce insulin.

[question number = 02.5] Which of the following is a risk of genetic engineering of crops?

[question number = 03.1] Which modern development led to the suggestion of the Three-Domain System?

[question number = 03.2] What are the three domains? (short answer)

[question number = 03.3] Evidence for Darwin’s Theory of Evolution was found when resistance to what emerged in some species of bacteria? (short answer)

[question number = 03.4] What groups of organisms are eukaryotes?

[question number = 04.1] What term do we use to describe the release of an egg from the ovary? (short answer)

(short answer) [question number = 04.2] Describe how hormones control the menstrual cycle

[question number = 04.3] Blood glucose levels are controlled with insulin and glucagon to maintain suitable levels of blood glucose concentration. What type of feedback mechanism is this?

[question number = 04.4] What effects does adrenaline have on the heart? (short answer)

[question number = 04.5] What effect does adrenaline have on the liver? (short answer)

[question number = 04.6] What are two systems which allow your body to respond to its surroundings? (short answer)

[question number = 05.1] Drag and drop to match the role to each part of the nervous system.

[question number = 05.2] Sensory neurones have a fatty layer of insulation, what is it called? (short answer)

[question number = 05.3] What is the gap between neurones called? (short answer)

[question number = 05.4] Use some of the following words to fill in the blanks.

Receptor, effectors, detection, reflection, sensory

[question number = 05.5] What travels along neurones to pass information through the nervous system? (short answer)

[question number = 05.6] Arrange the steps in the correct order to describe how the nervous system reacts to changes in the external or internal environment.

[question number = 06.1] Which term do we use to describe the relationships between species that depend on each other for resources?

[question number = 06.2] Drag and drop to match the description to the correct term

[question number = 06.3] Which of the following are strategies organisms use to adapt to changing abiotic conditions?

(short answer) [question number = 06.4] Small fish → Mackerel → Tuna

Due to warming temperatures in the Celtic Sea, more blue sharks have been reported in areas where they were previously rare. The blue sharks feed on mackerel. For each organism in the original food chain, explain how its population size would change and why.

[question number = 06.5] Drag and drop to match the factor to the correct type

[question number = 06.6] A biologist wants to investigate the abundance of crabs on a rocky shoreline. (enter your answer)

Describe a method the biologist could use to estimate the abundance of crabs in this environment.

You should include:

• how to set up the sampling method
• how to collect and record data
• how to ensure accuracy and reliability of results.

[question number = 06.7] Conservation of habitats is also important to protect endangered species. Which of the following are potential reasons for maintaining high levels of biodiversity?