Nicole is observing a longitudinal section of a bone. the second innermost layer of the bone appears web-like, less dense than the third layer, and is well-supplied with blood vessels. which layer of bone is she observing? periosteum compact bone spongy bone

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.