At approximately what age is the maximal level of bone mineralization reached?
A. 45-50
B. 30-40
C. 15-18
D. 20-30
B
You might also like to view...
The metabolic diversity of photosynthetic bacteria stems from different
A) bacteriochlorophylls and pigments they contain. B) chlorophylls they can have and organic compounds they can produce. C) light-harvesting complexes, electron donors, and organic compounds they produce. D) unrelated taxa capable of photosynthesis.
When a photon collides with a pigment in a photosystem, an electron is boosted to a higher orbital and then ________
a. returns to its ground state, emitting the extra energy as heat b. returns to its ground state, emitting the extra energy as a photon of lower energy c. the electron enters an electron transfer chain in the stroma d. the electron enters an electron transfer chain in the thylakoid membrane
What accounts for carbon’s importance to life?
a. its ability to form rings b. its nonpolarity c. its versatile bonding behavior d. its ability to form rings e. its large size
Water draining from the land mixes with seawater
carried in on tides in which of the following? a. upper littoral b. midlittoral c. lower littoral d. estuary e. upwellings