Biology and Chemistry Fundamentals Quiz

Compare the advantages of sexual and asexual reproduction.

• Sexual reproduction increases variety, asexual reproduction is rapid and produces many offspring.

• Both have the same advantages.

• Asexual reproduction increases variety, sexual reproduction is rapid.

• Sexual reproduction is always better.

What is the role of a niche in an ecosystem?

• It determines where organisms live and what they eat.

• It only affects plants.

• It is not important for survival.

• It only affects predators.

What is speciation and what can cause it?

• Speciation is the formation of new species due to environmental changes.

• Speciation is the extinction of species.

• Speciation is the mixing of two species.

• Speciation is unrelated to the environment.

How do discrete and continuous variation differ?

• Discrete variation has distinct categories, continuous variation shows a range.

• Both have only two categories.

• Continuous variation has no categories.

• Discrete variation is always inherited.

What is a key characteristic of mammals?

• Mammals give milk to their young.

• Mammals lay eggs.

• Mammals have scales.

• Mammals do not care for their young.

How do you calculate the number of neutrons in an atom?

• Subtract the atomic number from the atomic mass.

• Add the atomic number and atomic mass.

• Subtract the atomic mass from the atomic number.

• Multiply the atomic number by the atomic mass.

What is the chemical formula for carbon dioxide?

• CO₂

• H₂O

• NaCl

• O₂

Which of the following is an example of a chemical change?

• Melting ice

• Cutting paper

• Burning wood

• Freezing water

Which of the following is a physical change?

• Rusting of iron

• Baking a cake

• Dissolving sugar in water

• Burning gasoline

Which of the following is a molecular compound?

• NaCl

• H2O

• Fe

• CuSO4