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Biology · 100-Mark Comprehensive Assessment

Biology Comprehensive Practice Test 1

A 100-mark Biology assessment covering 0-0-0 — What Is Biology?, 0-0-1 — Cells: The Building Blocks of Life, 0-0-2 — Ecosystems & Biodiversity — progressing from foundational knowledge to application, analysis and higher-order reasoning.

EDUSAMBAM Editorial Team·45 questions · 100 marks·Basic → Advanced

Questions

100

Marks

Sections

100%

Auto-Graded

A — Multiple Choice	15	2	30
B — True / False	10	2	20
C — Fill in the Blank	10	2	20
D — Column Matching	5 pairs	2	10
E — Short Answer	5	4	20
Total	45	—	100
Total	45	—	100

Fill-in-the-blank and short-answer questions are checked automatically against accepted answers — exact wording does not need to match, but the key term should be present.

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Section A — Multiple Choice

30 marks

15 questions · 2 marks each.

1.Which statement best explains why biology is considered an integrative science?Basic2 pts

A. It connects processes across molecular, cellular, organismal and ecological levels

B. It studies only human anatomy

C. It avoids chemistry and physics

D. It focuses only on naming organisms

2.Which structure is the basic unit of life?Basic2 pts

A. Tissue

B. Cell

C. Organ

D. Ecosystem

3.A cell membrane is especially important because it:Basic2 pts

A. Stores all hereditary information

B. Controls movement of substances between the cell and its surroundings

C. Produces every protein directly

D. Prevents all substances from entering

4.Which sequence moves from smaller to larger levels of biological organisation?Basic2 pts

A. Organ → tissue → cell → organism

B. Cell → tissue → organ → organism

C. Ecosystem → organism → organ → cell

D. Organism → organ → tissue → cell

5.An ecosystem includes:Basic2 pts

A. Only animals in a habitat

B. Only plants and microorganisms

C. Living organisms plus the physical environment and their interactions

D. A single population only

6.Which example is a population?Intermediate2 pts

A. All organisms in a pond

B. All frogs of one species living in a pond

C. A frog and the water around it

D. All ecosystems on Earth

7.Biodiversity can include variation:Intermediate2 pts

A. Only between ecosystems

B. Only among individual humans

C. Within genes, among species and among ecosystems

D. Only in body size

8.A hypothesis is strongest scientifically when it:Intermediate2 pts

A. Cannot be tested

B. Produces testable predictions

C. Is accepted by everyone

D. Is based only on opinion

9.Homeostasis refers to:Intermediate2 pts

A. Permanent growth

B. Regulation of internal conditions within suitable ranges

C. Movement between ecosystems

D. Evolution of a species

10.Natural selection can change a population when:Intermediate2 pts

A. Heritable variation affects reproductive success in a particular environment

B. Individuals consciously choose useful mutations

C. All individuals are genetically identical

D. Traits are never inherited

11.Which observation is quantitative?Advanced2 pts

A. The leaf looks darker

B. The plant grew 4.2 cm in seven days

C. The fish behaved unusually

D. The solution became cloudy

12.A food web is more informative than a simple food chain because it:Advanced2 pts

A. Shows only one feeding relationship

B. Shows interconnected feeding relationships among organisms

C. Excludes decomposers

D. Measures population size directly

13.If a habitat loses a major producer, the first major ecological effect is likely to involve:Advanced2 pts

A. Reduced energy entering the food web

B. Immediate creation of a new species

C. No change because consumers make their own food

D. An increase in every population

14.Which statement best connects evolution and biodiversity?Advanced2 pts

A. Evolution contributes to diversification and differences among lineages

B. Evolution eliminates all variation

C. Biodiversity prevents evolution

D. They are unrelated processes

15.A strong biological explanation of a declining frog population should first:Advanced2 pts

A. Assume one cause

B. Identify evidence and consider interacting factors such as habitat, disease, predation and environmental change

C. Ignore environmental conditions

D. Use population size without a time frame

Section B — True / False

20 marks

10 questions · 2 marks each.

16.All living organisms are multicellular.Basic2 pts

True

False

17.Cells maintain organised internal processes using energy and information.Basic2 pts

True

False

18.A community includes organisms of different species living and interacting in an area.Basic2 pts

True

False

19.An ecosystem contains only living components.Basic2 pts

True

False

20.Homeostasis means that every internal condition remains perfectly constant.Basic2 pts

True

False

21.A scientific conclusion can be revised when strong new evidence appears.Intermediate2 pts

True

False

22.Natural selection acts on populations across generations, not because individuals deliberately choose to evolve.Intermediate2 pts

True

False

23.Biodiversity refers only to the number of species in a habitat.Advanced2 pts

True

False

24.Energy generally enters many ecosystems through producers and is transferred through feeding relationships.Advanced2 pts

True

False

25.A correlation by itself always proves that one biological variable causes another.Advanced2 pts

True

False

Section C — Fill in the Blank

20 marks

10 questions · 2 marks each. Type the missing word or term.

26.The basic structural and functional unit of life is the ______.Intermediate2 pts

27.The maintenance of relatively stable internal conditions is called ______.Intermediate2 pts

28.A group of organisms of the same species living in an area is a ______.Intermediate2 pts

29.The variety of life at genetic, species and ecosystem levels is called ______.Intermediate2 pts

30.Organisms that make organic food from inorganic sources are called ______.Intermediate2 pts

31.A proposed explanation that can be tested is a ______.Advanced2 pts

32.The process by which populations change across generations is called ______.Advanced2 pts

33.The biological study of interactions between organisms and their environment is called ______.Advanced2 pts

34.The smallest level in this sequence—cell, tissue, organ—is the ______.Advanced2 pts

35.A network of interconnected food chains is a ______.Advanced2 pts

Section D — Column Matching

10 marks

Use the ▲ ▼ buttons to reorder Column B until each row lines up with the correct term in Column A. 2 marks per correct pair.

36–40.Match each term in Column A with the correct description in Column B.Advanced10 pts

Column A

Cell

Population

Ecosystem

Homeostasis

Biodiversity

Column B

B. Members of one species in an area

C. Organisms plus their physical environment

D. Regulation of internal conditions

E. Variety of life at multiple levels

A. Basic unit of life

Section E — Short Answer

20 marks

5 questions · 4 marks each. Answer in one or two sentences.

41.Explain two reasons why a cell must regulate what enters and leaves it.Advanced4 pts

42.Distinguish a population, community and ecosystem using one consistent example.Advanced4 pts

43.Explain how natural selection can increase the frequency of an inherited trait without an organism intentionally changing its genes.Advanced4 pts

44.A pond loses much of its plant life. Predict two likely consequences and explain the links.Advanced4 pts

45.Why is evidence from more than one biological level often useful when explaining a complex problem?Advanced4 pts

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