Final answer:
Natural selection favors plants producing small seeds in wet environments and larger seeds in dry environments, due to the different survival strategies required for seed germination and growth in varying levels of moisture availability.
Step-by-step explanation:
The statement that natural selection should favor plants producing small seeds in wet environments and plants that produce larger seeds in dry environments is true. This is based on the principle that plant species adapt to their environment to increase their chances of survival and reproduction. In wet environments, where water is abundant, plants can afford to produce a larger number of small seeds, as these seeds do not require as much stored energy to germinate and grow. Conversely, in dry environments, plants benefit from producing fewer, larger seeds because these often have more stored energy and protective coatings that aid in survival during periods of drought. These adaptations are crucial for seed germination and the growth of plants under different environmental conditions.