Consider a Sheet of Epithelial Tissue That Invaginates to Form

question 14

Short Answer

Consider a sheet of epithelial tissue that invaginates to form a tube along the anterior-posterior axis of a developing vertebrate embryo. The tube is then closed concomitant with a "convergence and extension" process similar to that observed in germ-band extension in Drosophila melanogaster. During this process, the tube elongates and narrows before pinching off from the sheet. Which axis (1 or 2) in the following schematic drawing of the tube cells do you think corresponds to the anterior-posterior axis? Write down 1 or 2 as your answer.

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Definitions:

CAPM

The Capital Asset Pricing Model; a formula that calculates expected return on investment based on its risk relative to the market.

Risk-Free Rate

The projected gain from an investment without any risk, commonly exemplified by the returns on government bonds.

Market Proxy

A benchmark or index that represents the overall movement of the market, used for comparative analysis of an investment's performance.

CAPM

Capital Asset Pricing Model, a formula that describes the relationship between the expected return of an investment and its risk.