Adepression in the ground due to a cave collapse or acidic water dissolution of limestone is called aa. sinkholeb. stalactitec. stalagmited. cave

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

If there are 350 trout found in 200 square feet of a pond measuring 1000 square feet what is the estimated trout population of the pond? a. 1350 b. 1550 c. 1750 d. 2000