According to Researchers, the Increase in Atmospheric Oxygen Can Be

question 33

Multiple Choice

According to researchers, the increase in atmospheric oxygen can be explained primarily by

• A)the appearance of cyanobacteria.
• B)a decrease in volcanic activity.
• C)an increase in biomass.
• D)a decrease in carbon dioxide.

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Definitions:

Horizontal

Referring to the orientation parallel to the ground or to the bottom and top edges of most two-dimensional objects.

Underground Stem

Plant structures that grow below the soil surface, serving as storage organs and helping in asexual reproduction; examples include rhizomes and tubers.

Detachable Small Plants

Plants that can naturally or artificially separate from the parent plant to propagate asexually and form new individual plants.

Parent Plant

The original plant from which cuttings, seeds, or other reproductive material is taken for the purpose of propagation.