30. Possessing an exoskeleton that must be periodically shed in order to grow is

Question

30. Possessing an exoskeleton that must be periodically shed in order to grow is a synapomorphy defining the: a. Echidnas. b. Echinacaea. c. Ecdysozoans. d. Echinoderms. e. Insects. 31. Basidiomycetes and ascomycetes are similar to the algal ancestor of land plants in that all three: a. are strictly restricted to aquatic habitats like ponds and streams. b. reproduce through the use of diploid spores. c. possess no sporophyte life history stage. d. are never diploid during their life history. 32. In a homosporous plant life cycle, a spore grows into a gametophyte using and a spore is produced from a sporophyte by a. plasmogamy; meiosis b. mitosis; meiosis c. meiosis; mitosis d. karyogamy; meiosis e. plasmogamy; fertilization

Explanation / Answer

30. C. Ecdysozoans because The name Ecdysozoa refers to the animals showing the periodic shedding of the cuticle of an arthropod or the outer epidermal layer of a reptile. This process of periodic shedding of the exoskeletonis called ecdysis that is controlled hormonally by a class of steroids appropriately called ecdysteroids. Ecdysozoans also includes insects

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