Starburst galaxies
a. contain a large number of very young stars, but very little evidence of gas clouds.
b. contain a large number of very old stars and almost no gas or dust.
c. are often associated with a galaxy that is colliding with another galaxy.
d. are common in rich clusters.
e. are composed of filaments and voids.
Question 2
Both the CNO cycle and the proton-proton fusion chain convert hydrogen to helium using catalysts.
a. True
b. False
Indicate whether the statement is true or false