Hydrogen bonds occur between hydrogen in one polar molecule and ___ in another polar molecule. I. Oxygen
II. Fluorine
III. Nitrogen

Sand spinifex grass is adapted to growing on sand dunes. it is a rapidly spreading plant and the creeping runners produce new root systems. which of these best explains the benefits of these features? a. it limits water loss through the leaves. b. it provides support by anchoring the plant. c. it protects the plant from predators. d. it allows the plant to tolerate salt. reset submit

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees