Question

Fill in the blanks USING the terms in the word bank

___________ have no symmetry or germ layers, no nervous system, and are completely aquatic. They have ___________________ for feeding. _______________ have two germ layers, a ______________ with no brain and in which messages can travel in both directions, and stinging cells. Ctenophores resemble them in some respects, but have ___________________ instead of stinging cells. Flatworms have a(n) ____________________, with a brain and one-way conduction. Many rotifers and roundworms are _________________, i.e., females lay unfertilized eggs which develop into females. Animals with a mouth but no anuss are said to have a(n) _______________________. Many marine animals have larvae in the plankton; this is an example of _______________________. Such animals are often _______________ as adults, meaning they do not move. Three shared derived characteristics of the Phylum Mollusca are _______________, ______________, and ________________. Most mollusks have a(n) __________ circulatory system, but cephalopods have a(n)__________ circulatory system. The largest phylum, Arthropoda, includes ______________, the only invertebrates that can fly, who use _________________ for respiration. Arthropods with antennae, maxillae, and mandibles include Pancrustacea and ______________. The ______________, who have simple but no compound eyes, include spiders, or _____________, and mites, or _____________. Beetles are found in Order ____Coleoptera_____. Order ____Lepidoptera _ includes moths and butterflies. (23)

Word bank (not all are used): sessile, Araneae, Lepidoptera, choanocytes, radula, nerve net, insects, Acari, colloblasts, mastax, open, central nervous system, Coleoptera, spicules, ctenidia, Myriapoda, parthenogenetic, sponges, benthic, complete gut (also known as an alimentary canal), Cnidaria, arachnids, closed, indirect development, mantle, tracheae, Scorpiones, incomplete gut (also known as gastrovascular cavity), direct development, Hymenoptera

Answer 1

a) Sponges have no symmetry --- (11) Chanocytes for feeding ") Cnidaria have two gesem lay en a nerve net with no brain Stamiduse instead of stingeing cells Colloblasts (5) Central nervous system with a brain and one way conduction Parethenogenetic (Many omotifers and Roundworms) » incomplete gut Indirect development such animal are often sessile

- 10 Shared derived characleotice a Phylum mollusca are Radula, mantle complete gut. " o system but Most have oben uswulelery system but Cephalopods have closed Include Insects who use trachal ho Pancrustacea and myriopoda 14) Spiders or Arachnide Beetle and scorpions.