Describe what the relationship is between the trough and the crest as they relate to wave speed?

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.

An animal cell (left) and a plant cell (right) are shown.which organelle, labeled x in the diagram, is found in both plant and animal cells?