Based on the Experiment in Which Drosophila Flies Were Raised

question 38

Multiple Choice

Based on the experiment in which Drosophila flies were raised in a higher than normal oxygen concentration,which statement is most likely true?

• A) Fly body size is constrained because there are not enough alleles that increase body size.
• B) Fly body size is constrained because alleles that increase body size are selected against at normal oxygen levels.
• C) At normal oxygen concentration levels,fly body size is under strong directional selection.
• D) Fly body size would likely increase if flies were raised at lower than normal oxygen concentrations.
• E) Increased oxygen levels appear to have little effect on fly body size,even after many generations.

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Definitions:

Lobules

Small, defined sections or subdivisions in an organ or gland, often referenced in the context of the liver or breast tissues.

Central Venous Structure

Refers to the major veins located near the heart that collect blood from the body and transport it back to the heart for reoxygenation.

Taenia Coli

Bands of longitudinal muscle fibers on the colon's surface, contributing to its segmentation and movement of contents.

Haustra

The sacculations or pouches formed by the folding of the colon's wall, allowing expansion and elongation for the process of digestion.