Which of the following organisms is not in the phylum Echinodermata?

a. brittle star

b. lancelet

c. sea star

d. sand dollar

What provides the information necessary to specify the three-dimensional shape of a protein?

Imagine that a clam accumulates one unit of mercury in its body from the water it lives in. How many units of mercury would a stingray accumulate if it eats 50 clams a day for 10 years, assuming no mercury is lost between the clams and stingray?

What is a major difference between skeletal muscle and cardiac muscle? what is a major difference between skeletal muscle and cardiac muscle?

What are 2 ways that all cells are alike

What sort of environment (hypotonic, hypertonic, isotonic) did the extra fertilizer create around the roots of the corn?

What primarily determines whether a planet has plate tectonics

A wave hits an object as shown Which kind of wave interaction is shown? absorption Diffraction Refraction Reflection

Which colorimetric test could be used to assay a person's urine and what color change could indicated mild diabetes? biuret or benedict

Observing animal tracks is an example of direct observation, which is used to estimate population size. True or False

How do valley glacier forms Someone answer this now!