An amoeba is a one-celled organism. The cell theory states that which of the following characteristics of amoebas must be true? *

Consider the diagram below, which represents components of the biosphere. what do the two arrows in the diagram most likely represent? a. radiation b. photosynthesis c. cellular respiration d. energy conversions will give to anyone who answers quickly

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000