Today,the Fossil Record

question 11

Multiple Choice

Today,the fossil record

• A)can be dated only in terms of how layers relate to each other (i.e.older layers are below younger layers); no actual dates can be estimated.
• B)can be dated reasonably well only with uranium-238.
• C)can be dated reasonably well using a variety of radioactive isotopes with known half-lives.
• D)can be dated precisely,to within a single year,using radioactive isotopes.
• E)can be dated precisely,to within a single year,using DNA hybridization.

---

Definitions:

Upkeep

The process of maintaining or preserving someone or something, or the cost involved in maintaining a property, equipment, etc.

Depreciation Tax Shield

A reduction in taxable income for businesses that results from the allowance for depreciation expenses.

CCA Class

Stands for Capital Cost Allowance Class, which is a categorization used in Canadian tax law for the purpose of calculating depreciation for tax purposes.

Borrowed Money

Funds that are loaned to an individual or business with an obligation to repay the amount plus interest.