Ellen grabs a topsoil sample in her hand. she rolls it into a ball. the soil feels gritty and the ball falls apart. what part of the topsoil most likely made the topsoil feel gritty? a-clay b-sand c-silt d-humus

If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

Which of the following is not associated with invasive species?