Why does compact bone have canaliculi, but spongey bone does not?
a) spongy bone does not have osteocytes, unlike compact bone.
b) spongy bone does not require a blood supply.
c) nutrients and waste cannot diffuse through spongy bone
d) nutrients and wastes cannot diffuse through compact bone.

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

What is the difference between an igneous, sedimentary and metamorphic rock

How and why organisms are hierarchically classifies