All of the following separate geologic time into eras, periods, and epochs except:

major extinctions

periods of biological diversity

changes in the earth's geology

extinction of one type of species

Ruth is heterozygous for the BRCA1 mutation. One of her parents contributed a normal allele to her whereas the other parent contributed a mutant allele to her.

2. What occurs first during DNA replication? A. Two new daughter cells are formed. B. Two identical DNA molecules are formed. C. The two sides of a DNA molecule separate between the nitrogen bases. D.

What kind of fertilization do reptiles utilize? a. internal. b. external. c. partly internal and partly external. d. none of the above.

1) A plant gets 628.3 kcal of energy from the sun, what energy is left at the quartenary consumer level? 2) a food chain receives 650 units of energy from the sun. HOW much is still available at the tertiary consumer level?

You have a 31-year-old male who was bitten by a venomous snake while working in the yard. the scene is now safe. choose the answer that best lists the proper steps for treating a venomous snake bite of the hand.

Rafflesia arnoldii is a bright red and yellow flowering plant that has no leaves, roots, or stems. rafflesia do not carry out photosynthesis. they take nutrients from the cells of grapevines. rafflesia arnoldii is an example of a

Evolution definition

Fluorescent dyes can be added to groundwater in order to trace the waters path. A researcher placed some fluorescent dye into a stream. Which of the following is the most direct route for the dyed water to take to the ocean? A. Via an aquifer B.

The cell membrane does all of the following except: Answer contains the hereditary material acts as a boundary or border for the cytoplasm regulates passage of material in and out of the cell functions in the recognition of self

How do you think a short-legged sheep would fare in the wild? Make a list of advantages and disadvantages ...