All organisms that photosynthesize fit into which nutritional category? A. mixotroph B. parasites C. heterotrophs D. autotrophs Why are gymnosperms considered to be "naked seed" plants? A. Their seeds...

All organisms that photosynthesize fit into which nutritional category? A. mixotroph B. parasites C. heterotrophs D. autotrophs Why are gymnosperms considered to be "naked seed" plants? A. Their seeds have a thin layer of endosperm B. They do not produce seeds; they produce only spores C. Their seeds are not enclosed within ovaries. D. Their seeds develop on the surface of sporophytes. Sponges are examples of ________. A. animals that lack tissue B. animals that exhibit bilateral symmetry C. photoautotrophs ________ are characterized body tissues, radial symmetry, and tentacles with stinging cells. A. Sponges B. Annelids C. Cnidarians D. Roundworms ________ are the mammalian group that lays eggs. A. Monotremes B. Tunicates C. Eutherians D. Marsupials