Biology Final '25

The first step in sequencing the human genome is

• locating overlapping sequences
• identifying genes by finding promoters
• cutting the DNA into manageable pieces
• sorting introns from exons

Figure 1-2 shows that tree finches and ground finches are descended from a common ancestor. This example represents which big idea in biology?

• interdependence in nature
• growth, development, and reproduction
• homeostasis
• evolution

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A scientist working in which area of biology is MOST likely to study DNA?

• information and heredity
• cellular basis of life
• matter and energy
• interdependence in nature

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NGSS.HS-LS1-1

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What are the smallest units of life?

• cells
• body organs
• molecules
• organisms

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The three particles that make up atoms are

• protons, neutrons, and isotopes
• protons, isotopes, and electrons
• protons, neutrons, and electrons
• positives, negatives, and neutrals

What subatomic particle is found in the space surrounding the nucleus of an atom?

• protons
• electrons
• neutrons
• ions

Isotopes are atoms of the same element with the same number of protons and a different number of

• electrons
• molecules
• neutrons
• ions

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Which of the following makes up a molecule of water?

• one atom of hydrogen and one atom of oxygen
• one atom of sodium and one atom of chlorine
• one atom of hydrogen and two atoms of oxygen
• two atoms of hydrogen and one atom of oxygen

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NGSS.MS-PS1-1

A covalent bond is formed as the result of

• transferring electrons
• sharing electrons
• transferring protons
• sharing protons

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When salt is dissolved in water, water is the

• reactant
• solution
• solute
• solvent