Crabs Have Claws on Their Front Legs and Many Sets

question 38

Essay

Crabs have claws on their front legs and many sets of walking legs (which lack claws) on segments posterior to the claws. Crabs can regenerate legs if they are lost. A walking leg was removed and tissue from the claw was transplanted onto the stump. If homeobox genes are responsible for the differentiation of leg types, what would you predict would happen to the stump? Describe analogous experiments that have been performed in other species.

---

Definitions:

Adjusting Entry

An accounting journal entry made at the end of an accounting period to allocate income and expenditure to the appropriate period.

Interest-Bearing Note

A debt instrument that pays interest to the holder at a specified rate over the life of the note until its maturity.

Interest-Bearing Note

A debt instrument that pays interest to the holder until the maturity date when the principal amount is repaid.

Interest Expense

The cost incurred by an entity for borrowed funds, representing the interest payable on any type of debt.