Thorium-234 has a half-life of roughly 24 days. If you have a 500 g sample of thorium-234, how much will be left after 48 days?

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these