SAT Subject Biology Practice Question 47: Answer and Explanation
1. Which of these plant forms are diploid?
A. I only
B. II only
C. III only
D. I and II
E. II and III
Correct Answer: B
Only the sporophyte is diploid. The sporophyte produces haploid spores, which divide mitotically to produce the gametophyte. The gametophyte produces haploid gametes.