Endochondral ossification step 3
What will be an ideal response?
Periosteal bud invades cavities, leading to formation of spongy bone (bud is made up of blood vessels, nerves, red marrow, osteogenic cells, and osteoclasts)
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What is a disadvantage of using fossils to reconstruct phylogenetic history?
A. Fossils are a physical record of organismal structure. B. Fossils yield information about the timing and order of events in the past. C. Fossils reveal relatedness. D. The probability of fossilization varies among species.
An activator is to an enhancer as a(n) _____ is to a silencer.
A. transcription factor B. inducer C. repressor D. mediator E. RNA polymerase II
DNA can be transferred from one bacterial cell to another by ____
a. conjugation only b. transformation only c. conjugation and transformation only d. conjugation and transduction only e. conjugation, transformation, and transduction
Which one of the following statements is TRUE regarding parathyroid hormone (PTH)?
A) It stimulates the release of growth hormone. B) It is released when blood calcium levels are high. C) It has the same function as calcitonin. D) It causes the breakdown of bone. E) It causes decreased activity of osteoclasts.