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A student looks at a slice of tissue on an unlabeled microscope slide. The student concludes the tissue is not from an animal becasue the cells in the tissue have |
Cell walls |
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Look at the illustration in figure 25-2, this animal can be classified as |
A pseudocoelamate |
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The coelom is a body cavity |
Completely lined with mesoderm |
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One advantage of asexual reproduction is that animals can |
Increase their numbers rapidly |
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The notochord is responsible for which function in an embryo |
Structural support |
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A marine biologist discovered a new tiny aquatic invertebrate species that lacks gills. The most reasonable hypothesis would be that the animal gets oxygen through |
Diffusion across its skin |
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Which of the following is a fertilized egg |
A zygote |
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The difference between a protostome and a deuterostome is that |
The blastopore in a deuterostome develops into the animal’s anus |
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Which cordage characteristic is visible on the outside of an adult cat |
A tail that extends beyond the anus |
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Which of the three germ layers in animal embryo gives rise to muscles and much of the circulatory, reproductive, and excretory systems |
Mesoderm |
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Organisms that must obtain nutrients and energy by eating other organisms are |
Heterotrophic |
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Animals have nervous systems that |
Gather information |
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Look at the illustration in figure 25-4. Do you think that the bud on the side of the adult hydra is an embryo? Why? |
No, because budding is a type of asexual reproduction |
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Homeostasis is a |
Stable internal enviornemtn |
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Scientists rely on which of the following in order to classify animals |
Embryology all development patterns and adult body plans for all animals |
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Which of the following is anode that you would expect to find on the clad organ for animals |
Deuterostome development |
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A blastula is |
A hollow ball of cells in an embryo |
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Look at the illustration in figure 25-1 above. Which letter represents the hollow nerve cord |
B |
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A cell that contain a nucleus and membrane-bound organelles is |
Eukaryotic |
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An animals that has body parts that extend outward from its center shows |
Radial symmetry |
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When an animal’s environment changes, sexual reproduction improves a species’ ability to |
Adapt to new living conditions |
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The skeleton of a vertebrate is |
Internal and made of bones |
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In an animal that is bilaterally symmetrically which two halves mirror each other |
The left and right sides |
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The presence of legs or other limbs indicates that the animal is |
Segmented |
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Look at figure 25-5, which letter point to the endoderm |
C |
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Animals have an excretory system that eliminates which type of waste |
Ammonia |
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