Circle the letter of each sentence that is true about genes, chromosomes, and proteins.
a. genes control the production of proteins in an organism’s cells.
b. proteins determine the size, shape, and other traits of an organism.
c. chromosomes are made up mostly of proteins.
d. a single gene on a chromosome contains only one pair of nitrogen bases.

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The largest unit within which gene flow can readily occur is a