Based on the Figure Above,the Two Roots (Labeled)represent Which of the Following

question 8

Multiple Choice

Based on the figure above,the two roots (labeled) represent which of the following?
1) Ancestral populations
2) A common ancestor of birds and crocodilians
3) A common ancestor to all tetrapods
4) The ancestral lineage from which all other lineages on the tree are derived

• A)1 and 2
• B)1 and 3
• C)3 and 4
• D)1,2,3,and 4

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Definitions:

Stroma

The supportive tissue framework of an organ, gland, or other structure, often referring to the connective, functional tissue of an organ as opposed to its parenchyma.

Rubisco

An enzyme that catalyzes the first major step of carbon fixation in the process of photosynthesis.

Photorespiration

A metabolic pathway in plants that consumes oxygen, releases carbon dioxide, generates no ATP, and decreases photosynthetic output; it occurs when oxygen levels are high and carbon dioxide levels are low.

RuBP

Ribulose bisphosphate, a sugar involved in the initial step of carbon fixation in the process of photosynthesis.