Which of the following simple machines does a person use when raising a flag up a flagpole?

A. lever

B. wheel and axle

C. wedge

D. pulley

Determine who has made the correct statement. Betty said biologists never use the fossil record to determine the age of the earth. Cate said only geologists use the fossil record to determine the age of the earth. Betty is correct. Cate is correct.

Give a detailed account of adaptation which enable animals to live in a desert

Which of these is an example of quantitative data collection? A. recording amounts of chemicals used in an experiment and any temperature changes observed B. listing the materials, equipment, and process required for an experiment C.

Compared with a plant cell with few aquaporin proteins in its membrane, a similar cell containing many aquaporin proteins will

A pair of wild type fruit flies of unknown origin are mated and produce wild type F1 offspring. The F1s are allowed to interbreed and produce an all wild type F2.

Games like tag and hide and seek are examples of: A: Constructive play B: Fantasy play C: Creative play D: Motor play E: Parallel play

Explain in a complete sentence why it is important for scientists to share information with one another.

The DNA message depends on the order of the a. nitrogen bases. b. acids. c. sugars. d. genes.

How to tell if a fossil is older

Males have only one copy of each type of sex chromosome; therefore, all sex-linked genes are expressed, even recessive alleles. Based on this information, which statement is true? A.