The common sea lettuce, Ulva lactuca, is said to have an isomorphic life cycle. Which of the following statements about this species is true?
A) The sporophyte and the gametophyte look virtually identical.
B) The diploid and haploid stages of the life cycle are morphologically different from each other.
C) The male and female gametes are different sizes.
D) All of the above
E) None of the above

Question

Quizplus · Accepted Answer

Isomorphic life cycles refer to life cycles in which the sporophyte and gametophyte stages are morphologically similar or identical to each other. Therefore, choice A is correct as the statement explains that the sporophyte and gametophyte stages of Ulva lactuca are virtually identical. Choice B is incorrect as isomorphic life cycles mean that the diploid and haploid stages are morphologically similar. Choice C is also incorrect as the size of the gametes is not related to the isomorphic life cycle.

The Common Sea Lettuce, Ulva Lactuca, Is Said to Have