QUICK I NEED THE ANSWER!! Compare the symmetry of an echinoderm to the symmetry of worms

A. Both echinoderms and worms have bilateral symmetry
B. Echinoderms have bilateral symmetry and worms have radial symmetry
C. Echinoderms have radial symmetry and worms have bilateral symmetry
D. Both echinoderms and worms have radial symmetry

Which orbitals form a pi bond? a.the s orbital and three p orbitals b.the s orbital and two p orbitals c.overlapping p orbitals d.overlapping hybrid orbitals

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.