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

Which state would best be suited to harness wind energy?

A runner complained to his friends that he could not "get enough breath." They suggested that he talk with his doctor.

When scientists read research articles in scientific journals, they apply skepticism in order to a. revise the conclusions. b. describe experimental procedures. c. decide what other scientists will think. d. evaluate experimental procedures.

Why are the primers used to amplify the D1S80 region complementary to unique sequence outside the actual repeats, instead of using primers that would be directly complementary to the actual repeats?

Which of these is a behavioral adaptation in wolves A) Keen eyesight B) hunting in pacs C) sharp teeth C) thick fur

What initiates the contraction of cardiac muscle?

1. If the sequence on a DNA molecule was CCTAG, the complementary sequence on the mRNA would be: GGAUC GGUTC GGATC UUATU

Adrienne has a pet mollusk. Lately she noticed that her pet has learned how to escape its tank. What kind of mollusk is Adrienne's pet? What makes you believe this?

What math skill do scientists use

How are producers and consumers alike a. they both need sublight to make their own food b. they both are considered heterotrophs c. they both carry out nitrogen fixation d. they both need nutrients to carry out life functions?