1. (10 pt) all echinoderms move by pumping water into their tube feet, and their body is protected by hard plates. what other characteristic is common to all echinoderms? a. they have tentacles. b. their bodies have radial symmetry. c. their bodies are made up of a head, thorax, and abdomen. d. they have eyespots.

The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?

Why has two different alleles for the same trait?

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure. which would most likely occur in the kidney? a)more water would be transferred from the nephron. b)less water would be absorbed into the nephron. c)the amount of water in the bladder would decrease. d)the amount of water in the blood would increase.