Echinoderms are a group of aquatic invertebrates, but they are only found in
blank water.

The blank
of an echinoderm is made of hardened plates, which make the animal feel bumpy.

The body of an echinoderm is arranged like the spokes on a wheel. This is called
blank symmetry.

fill in the blanks Choose the word that best completes each sentence

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water