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Unit Exam #3 Trashketball

Unit Exam #3 Trashketball. 1. An animal has radial symmetry, a sac-like body with only one opening and tentacles with stinging structures. To which phylum does this animal belong? A. Annelida B. Cnidaria C. Mollusca D. Porifera.

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Unit Exam #3 Trashketball

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  1. Unit Exam #3 Trashketball

  2. 1. An animal has radial symmetry, a sac-like body with only one opening and tentacles with stinging structures. To which phylum does this animal belong? • A. Annelida • B. Cnidaria • C. Mollusca • D. Porifera

  3. 2. Which of the following is a characteristic of platyhelminthes? • A. Many pairs of legs • B. Flat body • C. Hard exoskeleton • D. Presence of cnidocytes

  4. 3. Which process tends to reduce variety within a population? • A. Natural selection • B. Random fertilization • C. Independent assortment • D. Crossing over

  5. 4. Which of the following will promote variation in a species? I. Meiosis II. Fertilization III. Natural selection • A. I only • B. II only • C. I and II only • D. I, II and III

  6. 5. What is evolution? • A. A measure of the relative survival and reproductive success of an individual • B. A cumulative change in the genetically controlled characteristics of a population • C. A physical change during an organism’s life that is inherited by its offspring • D. A random change in the proportions of alleles from generation to generation

  7. 6. Two different trees have been classified as Pinuspineaand Pinusnigra. Which of the following statements is correct? • A. Both trees belong to the same class but a different genus. • B. Both trees belong to the same family and same genus. • C. The species name of both trees is Pinus. • D. The family names are pineaand nigra.

  8. 7. To which group do sponges belong? • A. Cnidaria • B. Filicinophyta • C. Porifera • D. Mollusca

  9. 8. Interbreeding to form livestock animals or bigger profit corn plants would be anexample of… • A. Immigration • B. Artificial Selection • C. Emigration • D. Natural Selection

  10. 9. When a particular organism leaves its habitat, this is known as… • A. Gradualism  • B. Immigration • C. Evolution  • D. Emigration

  11. 10. When a small population settles and there is no environmental resistance, that population could be reaching a(an)… • A. Exponential growth phase • B. Environmental resistance • C. Transitional phase • D. Plateau phase

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