1.

From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have: ?

A. Tracheids, tracheae and sieve tubes
B. Tracheae and sieve tubes
C. Tracheae, sieve cells and sieve tubes
D. Tracheids, tracheae and sieve cells
Answer» B. Tracheae and sieve tubes


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