Bio 1150 exam 1 - Study guides, Class notes & Summaries

BIO 1150 Exam 1 - Questions with Verified Answers Postzygotic barrier A reproductive barrier that prevents hybrid zygotes produced by two different species from developing into viable, fertile adults Morphological species concept A definition of species in terms of measurable anatomical criteria. Ex. body shape and other structures Ecological species concept A definition of species in terms of ecological niche, the sum of how members of the species interact with the nonliving and living parts o...

BIO 1150 Exam 3 - Questions with Verified Answers Derived traits of land plants Alternation of generations Multicellular, dependent embryos Walled spores produced in sporangia Multicellular gametangia Apical meristems Symbiotic relationships with fungi Cuticle A waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants. Lignin Substance in vascular plants that makes cell walls rigid Sporophyte The stage in the life cycle of a plant ...

BIO 1150 Exam 4 questions and answers graded A+ What are four ways that a psychoactive drug may alter normal neurotransmitter signaling? -drug may stimulate release of neurotransmitter and enhance response of receiving neuron -drug may inhibit release of neurotransmitter and dampen response of neuron -may increase and prolong effect of neurotransmitter -drug may bind to receptor and effect activity of receiving neuron What is a gene? -segment of DNA on a chromosome that directs synt...