Biology Keystone Review Module A #4

Which characteristic of life is best shown by the diagram above?

• DNA is the genetic code in an organism.

• An organism is made of one or more cells.

• An organism responds to changes in its environment.

• Changes occur in an organism as it grows and develops.

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Which statement best explains why these cells have structural differences?

• The cells have different functions.

• The cells evolved in different organisms.

• One of the cells develops into the other type of cell.

• One of the cells is more primitive than the other cell.

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Which of the following is a property of water that allows a water strider to walk on the surface of water?

• solubility

• cohesion

• high specific heat

• low freezing point

Which statement describes the formation of a protein molecule?

• Amino acids combine to form a protein chain.

• Fatty acid monomers dissolve to form a protein chain.

• Fatty acid monomers combine to form a protein chain.

• Amino acids dissolve monomers to form a protein chain.

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A jackrabbit has large ears containing blood vessels that help it maintain a constant body temperature by adjusting heat exchange with the surrounding environment. Which characteristic of life is best described by this example?

• growth

• energy use

• organization

• homeostasis

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The functions of which human organ is most like the cell walls of bacteria?

• skin

• liver

• heart

• pancreas

Which structure and function are common to all plants and some protists and distinguish them from all animals?

• chloroplasts that conduct photosynthesis

• mitochondria that conduct photosynthesis

• chloroplasts that conduct cellular respiration

• mitochondria that conduct cellular respiration

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Which characteristic allows carbon atoms to form chains and rings with other carbon atoms?

• Carbon has several forms.

• Carbon can form four covalent bonds.

• Carbon is the fourth most abundant element in the universe.

• Carbon is a structural part of lipids, carbohydrates, proteins, and nucleic acids.

Cellulose is a carbohydrate and a polymer of glucose. Which statement best describes how cellulose is formed within living organisms?

• It is assembled by bonding individual atoms.

• It is constructed by connecting smaller monomer subunits.

• It is the product of the decomposition of a much larger molecule.

• It is the result of a physical change that alters the shape of a compound.

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Many plants have a waxy coating on their leaves. Which statement describes the most likely structure and function of the waxy coating?

• The waxy coating is a protein that can help attract other organisms for pollination.

• The waxy coating is a protein that can help release waste molecules during transpiration.

• The waxy coating is a lipid that can help prevent excess water loss in dry

  environments.