The Hormone Ecdysone

question 102

Multiple Choice

The hormone ecdysone

• A) is released from the posterior pituitary.
• B) stimulates molting in insects.
• C) maintains an insect in larval stages unless PTTH is present.
• D) stimulates the secretion of juvenile hormone from the prothoracic glands.
• E) keeps the insect exoskeleton flexible to permit growth.

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Definitions:

General Rule

An established guideline or principle that is generally followed or considered as a norm in a particular field or situation.

Herfindahl Index

A measure used to calculate the level of concentration in a market, by summing the squares of the market shares of each firm.

Greater Than

A mathematical symbol (>) denoting that a value on the left is larger than the value on the right.

Four Firms

Often refers to a concentration ratio in economics that measures the output or revenue share of the four largest firms within an industry.