The human skeleton initially consists of just cartilage, which is replaced by bone, except in areas requiring flexibility. Made of highly resilient, molded cartilage tissue that consists primarily of water. Contains no blood vessels or nerves.

What will be an ideal response?


Skeletal cartilages

Biology & Microbiology

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Based on your knowledge of hydrocarbon degradation, what factors most likely limited the rate of petroleum degradation after the Exxon Valdez oil spill off the coast of Alaska?

A) salt concentration B) temperature C) inorganic nutrient concentrations D) temperature and inorganic nutrient concentrations

Biology & Microbiology

What is a trace fossil?

A. a small fossil B. fossil evidence of organisms other than conventional fossils of hard body parts C. a fossil which is part of a series of fossils that trace the evolution of a group of species D. a fossil that allows scientists to trace the movement of the fossilized organism

Biology & Microbiology

You find an Arabidopsis plant in your greenhouse that lacks stamens and carpels, and has two rows of petals and sepals. What happened to cause this abnormal flower development?

A. a mutation in gene C B. an overexpression of gene B C. a mutation in gene A D. a mutation in gene C and overexpression of gene E E. mutations in gene C and gene A

Biology & Microbiology

Skeletons of modern cetaceans have remnants of a __________.

A. rib B. head C. flipper D. pelvis E. spine

Biology & Microbiology