The Chloroplasts of Red Algae Retain Certain Pigments of the Original

question 40

Multiple Choice

The chloroplasts of red algae retain certain pigments of the original cyanobacterial endosymbiont that are absent in green algal chloroplasts.The evolutionary significance of this is that

• A) red algae cannot photosynthesize,leading to heterotrophy.
• B) neither green algae nor red algae can be classified as protists.
• C) chloroplasts likely originated as free-living cyanobacteria.
• D) red algae are classified as cyanobacteria.
• E) red algae are classified as prokaryotes.

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Definitions:

E(x)

The expected value of a random variable x, representing the mean or average outcome.

Variance

A measure of how much values in a dataset differ from the mean of the dataset, indicating the spread of data points.

Discrete Probability Distribution

A statistical function that describes the probability of occurrence of each value of a discrete random variable.

Discrete Random Variable

A variable that takes on a countable number of distinct values and is often used to model scenarios where outcomes are distinct and separate.