Page 8 - Kindergarten.indd

23 A diagram of the carbon cycle is shown below.

Carbon Dioxide
in Atmosphere

X

Plants Animals Industry

Bacteria Fossil Fuels

Each arrow represents a process in the carbon cycle. Which statement below
best describes the process that occurs at arrow X?

A. Bacteria breaks down molecules in animals into carbon-based soil
nutrients.
B. Animals release oxygen that is used by bacteria to produce carbon dioxide.
C. Animals release carbon dioxide that is used by bacteria for growth and
reproduction.
D. Bacteria combines carbon-based nutrients from plants and animals to
produce glucose.

24 The diagrams below represent a plant and an animal cell.

Which part of the cell is labeled A in both diagrams?

A. cell wall
B. cytoplasm

C. chromosome
D. nucleus

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