Why Do Some Invertebrates, Such as Lobsters, Show a "Stair-Step

question 15

Multiple Choice

Why do some invertebrates, such as lobsters, show a "stair-step" survivorship curve?

• A)Many invertebrates mate and produce offspring on multiyear cycles.
• B)Within a species of invertebrates, younger individuals have a higher survivorship than older individuals.
• C)Many invertebrates moult in order to grow, and they are vulnerable to predation during their "soft shell" stage.
• D)Many invertebrate species have population cycles that go up and down according to the frequency of sunspots.
• E)The number of fertilized eggs that mature to become females in many species of invertebrates is based on ambient temperature.

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Definitions:

Capitalized

Refers to costs that are recorded as an asset on the balance sheet instead of being expensed immediately, in anticipation of future benefit.

Expensed

Describes costs that are charged against income in the period they are incurred, rather than being capitalized.

Normal Return

The expected return on an investment under normal conditions, considering historical averages and market conditions.

Excess Earnings

Profits that exceed the normal expected return on investment or capital for a business operation or asset.