1. Which of these is an example of chemical weathering?
O Plants wedge their roots into cracks in rock and push it apart.
O Acid rainwater seeps into the ground and dissolves limestone.
O Gravitational force pulls rocks to the bottom of a mountain.
Rock pieces carried by river water wear away pieces of rock in the riverbed.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. chinchilla x albino a) all chinchilla b) 1/2 chinchilla, 1/2 albino c) 3/4 chinchilla, 1/4 albino

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material