Which areas of South America are more likely to experience hot and dry conditions?

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity

The tubes transporting minerals and water upward are called ?