What is a suggested and testable explanation for an event called?

1. Discovery
2. Hypothesis
3. Scientific methods
4. Theory

Which branch of science is NOT considered a natural science?

1. Astronomy
2. Biology
3. Computer science
4. Physics

What is the name for the formal process through which scientific research is checked for originality, significance, and quality before being accepted into the scientific literature?

1. Publication
2. Public speaking
3. Peer review
4. Scientific methods

1. (i) diseases affecting humans, pollution affecting species habitat;

   (ii) calculating surface area of rectangular ground, functioning of planetary orbitals

2. (i) calculating surface area of rectangular ground, functioning of planetary orbitals;

   (ii) formation of metamorphic rocks, galaxy formation and evolution

3. (i) plant responses to external stimuli, functioning of planetary orbitals;

   (ii) formation of metamorphic rocks, galaxy formation and evolution

4. (i) plant responses to external stimuli, study of the shape and motion of physical objects;

   (ii) formation of metamorphic rocks, galaxy formation and evolution

1. Most swimming animals use fins; therefore, fins are an adaptation to swimming.
2. Mitochondria are inherited from the mother; therefore, maternally inherited traits are encoded by mitochondrial DNA.
3. Small animals lose more heat than larger animals. One would not expect to find wild mice in the North and South Poles.
4. Water conservation is a major requirement to survive in the desert. Long leaves increase loss of water by evaporation. Therefore, desert plants should have smaller leaves.

1. Viruses are not made of cells.
2. Viruses do not have genetic material.
3. Viruses have DNA and RNA.
4. Viruses are obligate parasites and require a host.

1. Bacteria
2. Eukaryotic cells
3. All living organisms
4. Prokaryotic cells

1. A community
2. An ecosystem
3. A family
4. A population

1. Biosphere, ecosystem, community, population, organism
2. Organelle, tissue, biosphere, ecosystem, population
3. Organism, organ, tissue, organelle, molecule
4. Organism, community, biosphere, molecule, tissue, organ

1. At the base
2. At the nodes
3. At the branch tips
4. Within the branches

1. Homeostasis and regulation
2. Metabolism
3. Nucleus containing DNA
4. Reproduction