All scientific names of organisms must be
A.) unique and have two Latin words
B.) different and repeat the phylum name
C.) similar and include the common name
D.) general and use the species name
Answer: A.) unique and have two Latin words
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Why does the number of species on an island level off at S?
A. Because resources become scarce as more species colonize an island. B. Because predation increases as more species colonize an island. C. Because extinction rates increase as more species colonize an island. D. Because colonization rates eventually decrease. E. All of the answer options are correct. F. None of the answer options is correct.
While innate immunity is ancient and universal amongst animals, the adaptive immune system is generally considered to be unique to the vertebrates. However, some researchers have suggested, with much controversy, that invertebrates may have a form of adaptive immunity as well. What sort of evidence would be required to fully demonstrate such a claim? (Check all that apply.)
_____ B and T cells _____ CD4 receptors _____ efficacy of vaccination _____ highly variable molecules that can bind various antigens _____ identified cells that are necessary to provide acquired immunity _____ immunoglobulin molecules _____ resistance upon second exposure to a pathogen _____ specific resistance to one strain but not another after exposure _____ thymus gland _____ Toll-like receptors
In an experiment, the control group
a. is not subjected to experimental error. b. is exposed to experimental treatments. c. is identical to the one being tested except for the variable being studied. d. is treated exactly the same as the experimental group, except for the one independent variable. e. is statistically the most important part of the experiment
When crossing a true-breeding red snapdragon flower with a true-breeding white flower of the same species, all offspring are pink. This would seem to support the pre-Mendel view that inheritance is a blending of parental traits. However, Mendel and conventional wisdom agree that "blending" of parental traits is not correct and that particles of inheritance are actually involved. Which of the following statements supports the idea of particulate inheritance? Select all that apply.A) Two parents that show the incompletely dominant phenotype produce some offspring that are red and some that are white.B) Over many generations of crossing individuals with the incompletely dominant phenotype, all the progeny are pink.C) There is no way to directly prove that incomplete dominance is not a case
of blending.D) In meiosis, alleles of different genes assort independently of each other during gamete formation. What will be an ideal response?