Which of the following sequences correctly describes the stages of life for a low-mass star?
A) protostar, red giant, main-sequence, white dwarf
B) protostar, main-sequence, white dwarf, red giant
C) white dwarf, main-sequence, red giant, protostar
D) protostar, main-sequence, red giant, white dwarf
E) red giant, protostar, main-sequence, white dwarf
Question 2
What happened to all of the quarks that existed freely during the particle era?
A) They froze out of the soup of particles at the end of the era.
B) They combined in groups to make protons, neutrons, and their antiparticles.
C) They evaporated.
D) They combined in groups to make electrons and neutrinos.
An overview of the two stages of photosynthesis: light reactions and the Calvin cycle
Inhibition and facilitation of spruce during the major successional stages at Glacier Bay, Alaska (d
Betelgeuse star (Hubble)
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
Stages of Sleep in Cats
Sea Star Body Plan