What on a bird, besides it's feet, is chemically similar to scales?

a. beakB. feathersC. wings

How is climate change relate to Environmental science

If evolution does not occur, what happens to the frequency of genes in the gene pool?

Which macromolecule forms a double layer as the primary structure of cell membranes? A) fats B) oils C) phospholipids D) steroids

A plant is heterozygous for height (Tt) and red flowers (Rr). What possible gametes will this plant produce?

Describe basic science

Q: A: Which numbered organelle produces ATP during cell respiration

From earliest to most recent, what is the correct order in which organisms appear in the fossil record? a. dinosaurs, invertebrates, reptiles, mammals b. invertebrates, amphibians, dinosaurs, mammals c.

Is it possible for technological advancements to have both positive and negative effects on the world

The plasma membrane (cell membrane) is made up of a (n)

In a plants stem the vascular tissue is A. is always arranged in rings of vascular bundles B. is continuous from the roots to thel leaves C. carriers nutrients up the stem but not down D. plays a role in photosynthesis and storage.