After a rain, a puddle of water remains on a sidewalk. After a day of sunshine, the puddle is gone. What caused the water to disappear?

What is the main function of the Krebs Cycle? A To supply energy for cell functions B To make carbon dioxide molecules C To fuel the glycolysis process D To produce energy-carrier molecules

Why does drool leave marks on paper

A woman with severe periodontal disease has a ___ times greater risk for a preterm infant with low birth weight compared with women with little or no periodontal disease.

Which of the following is true? A. Soil is not an important part of an ecosystem. B. Soil plays an important role in many ecosystems. C. Soil's only role is to hold plants in place.

Members of kingdom fungi are most closely related to which other group of eukaryotes?

Influenza (the flu) is caused by a virus that attacks the respiratory system. Which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus?

How much time would it take for the second of thunder to travel 2000 meters if sound travels at the speed of 330 meters per sec

How can communities of organisms thrive on both active and extinct volcanoes?

The desert and tundra are alike because they both have A) extreme daily temperature changes. B) large seasonal variation. C) limited available water. D) sandy soils.

What are the potential effects of a supercell thunderstorm? Select all that apply. a. hail b. wind c. lightning d. tornadoes E. hurricanes F. squall lines