Animals Worksheet - A-Level - Intermediate

Animals worksheet for A-Level / Vocational (Ages 16-18). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•A-Level / Vocational (Ages 16-18)•Animalsintermediate

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Exploring Animal Physiology and Behaviour

A-Level Science: Animals (Ages 16-18, Intermediate)

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Instructions: This worksheet delves into various aspects of animal physiology and behaviour. You'll engage in activities that require critical thinking, data analysis, and application of scientific concepts. Each task is designed to enhance your understanding of animal biology and its ecological significance.

Animal Physiology: Respiratory Systems

Compare the respiratory systems of mammals and fish. Consider the structure and function of lungs and gills, and how these adaptations suit their respective environments. Use diagrams and examples to support your analysis.

Discuss the differences in respiratory systems between mammals and fish, focusing on adaptation to their environments. [15 marks]

Data Analysis: Population Dynamics

Analyse the table below, which presents data on a population of rabbits over several years. Answer the questions that follow to demonstrate your understanding of population dynamics and factors affecting population size.

Year	Population Size	Births	Deaths
2018	500	100	50
2019	550	120	60
2020	610	130	70
2021	670	140	80

1. Calculate the net change in population size from 2018 to 2021.

2. Identify the year with the highest birth rate.

3. Discuss one factor that could cause a decrease in population size.

Genetics and Evolution: Natural Selection

Explain the process of natural selection and how it leads to evolution. Use a specific animal example to illustrate your points. Consider variations, survival, and reproduction in your explanation.

Describe how natural selection operates in a population of cheetahs, focusing on speed as an adaptive trait. [15 marks]

Ecology: Food Web Analysis

Examine the food web diagram provided and answer the questions below. Consider the roles of producers, consumers, and decomposers, and how energy flows through the ecosystem.

Word Bank

AntherSepalStamenPistilPetalReceptacle

1. Identify the primary producers in the food web.

2. Explain the impact of removing a top predator from the ecosystem.

Animal Behaviour: Communication

Discuss the various ways animals communicate with each other. Focus on visual, auditory, and chemical signals, providing examples for each type of communication.

Evaluate the effectiveness of different communication methods in animals, using examples such as bird songs, pheromones in ants, and visual displays in peacocks. [15 marks]

Practical Skills: Investigating Enzyme Activity

Design an experiment to investigate the effect of temperature on the activity of the enzyme catalase. Consider variables, controls, and how you would measure enzyme activity.

Outline the steps for an experiment to test how temperature affects catalase activity in potato tissue. Include a hypothesis and describe how you would ensure the reliability of your results. [15 marks]

Answer Key

Activity 1: Discuss differences in respiratory adaptations; lungs vs. gills

Activity 2: 170 ; 2021 ; Disease or predation

Activity 3: Speed increases survival and reproduction rates in cheetahs

Activity 4: Plants ; Disruption of food web balance

Activity 5: Bird songs, ant pheromones, peacock displays

Activity 6: Temperature affects reaction rate; control variables, repeat trials