What is the earliest sign of puberty in girls?
A) The first menstrual period
B) The appearance of pubic and axillary hair
C) The onset of breast development
D) The increase in muscle mass
E) The appearance of sebaceous and axillary glands
C
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Choose the correct steps of the cell cycle that follow centriole replication.
G2 -> S -> M G2 -> M -> S S -> G2 -> M S -> M -> G2 M -> G2 -> S
The yellow color of urine comes from the presence of:
A) sodium ions. B) urochrome. C) glucose. D) ammonia.
The nasal complex consists of all of the following bones except the ________ bone
A) zygomatic B) ethmoid C) sphenoid D) frontal E) maxillary
The advantage of anaerobic metabolism is __________.
A) greater use of fat stores. B) fewer pesky by-products. C) greater endurance. D) rapid ATP production. E) high yield of ATP.