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of 613 available terms
(13 exact duplicates found)

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5 Written Questions

5 Matching Questions

  1. threatened species
  2. culture
  3. bilateral symmetry
  4. biomass
  5. stop codon
  1. a the amount, or mass, or organic material in an ecosystem
  2. b as defined in the U.S. Endangered Species Act, a species that is likely to become endangered in the foreseeable future throughout all or a significant portion of its range
  3. c an arrangement of body parts such that an organism can be divided equally by a single cut passing longitudinally through it. A bilaterally symmetrical organism has a mirror-image right and left sides.
  4. d the ideas, customs, skills, rituals, and similar activities of a people or group that are passed along to succeeding generations
  5. e in mRNA, one of the three triplets (UAG, UAA, UGA) that signal gene translation to stop.

5 Multiple Choice Questions

  1. the middle layer of the three embryonic cell layers in gastrula; gives rise to muscles, cones, and the dermis of the skin, and most other organs in the adult.
  2. in molecular biology, a piece of DNA, usually a plasmid or a viral genome, that is used to move genes from one cell to another
  3. the long-term prosperity of human societies and the ecosystems that support them
  4. a type of prezygotic barrier between species; the species remain isolated because structural differences between them prevent fertilization
  5. in animal behavior, an inquiry that focuses on the environmental stimuli, if any, that trigger a particular behavioral act, as well as the genetic, physiological, and anatomical mechanisms underlying it.

5 True/False Questions

  1. monophyleticpertaining to a taxon derived from a single ancestral species that gave rise to no species in any other taxa


  2. self-fertilizationa hard, external skeleton that protects an animal and provides points of attachment for muscles.


  3. biodiversity crisisthe current rapid decline in the variety of life on Earth, largely due to the effects of human culture


  4. horseshoe craba bottom-dwelling marine chelicerate, a member of the phylum Arthropoda.


  5. r-selectionthe concept that in certain populations, a high reproductive rate is the chief determinant of life history


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