How old dose boy's hit puberty

A scientist estimated that a mixture would need 5 milliliters of a chemical to balance. The actual amount needed was 7 milliliters. What was the percent error of the scientist's estimation?

Can the differences in temperature in the Earth's interior cause the plates to move? (I know this was listed under biology but, the subject is actually science sorry)

If a haploid cell has 20 chromosomes, how many chromosomes would be found in the diploid cells?

Crabs, lobsters and shrimp are all classified as

Write one reason why you would be a biologist

Vertebrae protect the cerebellum. true or false

Which of these is NOT a way that large molecules, like glucose, can enter a cell? A) diffusion through the cell membrane. B) facilitated diffusion through protein channels in the cell membrane.

The specialized functions of different membranes are largely determined by the blank they contain. Membrane lipids are blank molecules, composed of a hydrophilic portion and a hydrophobic portion.

Which of the following aren't eukaryotes? plants bacteria animals fungi

In pea plants, smooth pea shape is dominant to wrinkled pea shape. If a pea plant that is true-breeding for smooth pea shape is crossed with a pea plant that is true-breeding for wrinkled pea shape, what will be true of the offspring?