SAT Subject Biology Practice Question 50: Answer and Explanation
4. Which of these describes a difference between monocots and dicots?
A. Monocot embryos form two leaves; dicot embryos form a single leaf.
B. Monocot flowers may consist of five petals; dicot flowers may consist of six petals.
C. Monocot leaves have a branching network of veins; dicot leaves have parallel veins.
D. Monocot roots consist of many small roots growing from a taproot; dicot roots lack a taproot.
E. Monocot vascular tissue is arranged randomly in the stem; dicot vascular tissue is arranged in a ring.
Correct Answer: E
Monocot vascular tissue is arranged randomly in the stem, while dicot vascular tissue is arranged in a ring. All other answer choices have characteristics reversed.