What defines a mixture? a. it cannot be broken down into simpler substances. b. it can be described by a single chemical formula. c. it can be created through a chemical reaction. d. it can be broken down into its basic substances through physical means.

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Astudent analyzed ears of corn that demonstrated two traits in the f2 kernels, purple or white colors and smooth on wrinkled shapes. a tabulation of 135 individual kernels gave the following results: purple and smooth = 75 white and smooth = 28 purple and wrinkled = 24 white and wrinkled = 8 what would be the only phenotype present in the f1 ger