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.

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

Ineed some everybody. the production of cells during mitosis into specialized function is called: recombination or differentiation

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.