Why does the scaphoid bone take so long to heal?

A student placed a disk of filter paper in each of the following solutions: disinfectant 1, disinfectant 2, disinfectant 3, and distilled water.

As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato.

The plants in a red-tailed hawk's food chain produce 3 million kcal of chemical energy per day. How much energy is available to the hawk's trophic level, assuming 90% loss at each level?

What is a flexible barrier that protects the inside of a cell?

Is reproduction necessary for the survival of a species?

Based on this information what is the probability of producing a P plant with green seeds in a yellow pod? I/2 1/4 1/8 1/16

The decline in response of an organism to stimulus once that stimulus becomes familiar

Some people only 'burn" when exposed to the sun. the reason they do not tan is that:

Which cells migrate through the body, increase markedly in number whenever tissue damage occurs, and may develop into cells responsible for the production of antibodies?

Which would most likely decrease the genetic variation in the human population