If True, Which of the Following Would Be Most Important

question 63

Multiple Choice

If true, which of the following would be most important in determining whether P. chromatophora's cyanelle is still an endosymbiont, or is an organelle, as the term cyanelle implies?

• A) If P. chromatophora is less fit without its cyanelle than with it.
• B) If the cyanelle is less fit without the host cercozoan than with it.
• C) If there is ongoing metabolic cooperation between the cyanelle and the host cercozoan.
• D) If the magnesium-containing porphyrin ring in the cyanelle's chlorophyll molecules is built by the cyanelle, whereas the organic portion of the chlorophyll molecules is built by the host cercozoan.
• E) If there has been movement of genes from the cyanelle genome to the nuclear genome, such that these genes are no longer present in the cyanelle genome.

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Definitions:

Epidermis

The outer layer of cells covering an organism, particularly the surface layer of skin or leaves in plants, acting as a protective barrier against environmental stress.

Lateral Roots

Secondary roots that grow out from the main root of a plant, contributing to the stability and water/nutrient absorption capabilities of the plant.

Pericycle

A layer of cells found just inside the endodermis of plant roots, important for initiating lateral root growth.

Cortex

The outer layer of an organ or structure, such as the brain’s cortex involved in many higher-level brain functions, or the cortex of plants responsible for storage and transport.