🧬 Animal Characteristics & Embryonic Development

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7 Terms

1
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What are the characteristics of animals?

Multicellular, heterotrophic, no cell walls, most reproduce sexually, and undergo specific stages of embryonic development

2
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All animals are multicellular heterotrophs.

True

3
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In embryonic development, the blastula is a hollow ball of cells.

True

4
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In embryonic development like sea star, the gastrula is the hollow ball of cells stage.

False

5
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In starfish embryos, the first opening of the internal sac becomes what?

Anus

6
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Animal embryos have tissue layer as the outer covering and _ tissue layer that lines the digestive tract.

an ectoderm . . . an endoderm

7
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Ediacaran animals have soft body parts, whereas Cambrian animals had hard parts.

True