The age dating of the solar system is done by radioactive dating of ________.
Fill in the blank(s) with correct word
Question 2
The choices below each describe the appearance of an H-R diagram for a different star cluster. Which cluster is the youngest?
A) The diagram shows main-sequence stars of every spectral type except O, along with a few giants and supergiants.
B) The diagram shows no main-sequence stars at all, but it has numerous supergiants and white dwarfs.
C) The diagram shows main-sequence stars of spectral types G, K, and M, along with numerous giants and white dwarfs.
D) The diagram shows main-sequence stars of all the spectral types except O and B, along with a few giants and supergiants.
The bicarbonate buffer system
An overview of the arterial system.
Selected Central Nervous System Neurotransmitters and Their Functions
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