- - Tubellaria (free-living flatworms) - Trematoda (flukes)- Monogrnea (flukes)- Cestadai (tapeworms)
- 1) Urochordates (marine tunicates) 2) Cephalochordates (marine lancelets) 3) Vertebrates (animals with backbones)
- In all animals, except the sponges, the growing embryo develops different layers of cells during the process known as ___
- Protostome clade ______, which encompasses the mollusks, annelids, and several other phyla.
- Bilateria-3 Germ Layers :______Raidata-2 Germ Layers : _____
- Molting animals such as the nematodes and the arthropods
- After fertilization, an animal zygote undergoes ____, which produces a hollow sphere called a _____
- In a technique known as preimplatnation genetic diagnosis, a single cell from an approx. eight-cell human embryo is removed for genetic testing. The rest of the embryo can be implanted to complete its development. What property of development makes this possible for humans?-determinate cleavageindeterminate cleavage-radial cleavage-spiral cleavage
- Germ layers in animal embryos begin to form during the process of:
- Humans can be placed in all of the following groups EXCePT:eumetazoacoelomatesbilateriaprotostomes
- Animals lacking a fluid-filled body cavity are referred to as:
- The upper part of an organism is referred to as:
- All of the following may have contributed to the Cambrian explosion EXCEPT:the evolution of the Hox gene complex-the development of the ozone layer-high oxygen levels due to the arrival of land plants-a warm and wet environment with no ice at the poles-the evolutionary arms race between predators and prey
- All of the following are characteristics common to most animals except: heterotrophs, movement, multicellularity, cell walls, anchoring, tight and gap junctions
- Which germ layer lines the digestive tract?-ectoderm-endoderm-coelom-mesoderm
- The animal kingdom is ____ because all the taxa have evolved from a single common ancestor.
- T/F Some animals reproduce sexually.Some animals reproduce asexually.
- t/f Fertilization can occur externallyFertilization can occur internally
- T/F Some animals undergo metamorphosisAll embryos develop inside the mother
- The ancestor of animals is most closely related to which present-day group?