In Drosophila, a developmental mutation called ssa (spineless aristapedia) results in flies with mini leg parts on the antennae. What kind of gene is this mutation?

A) gap gene
B) pair-rule gene
C) homeotic gene
D) segment polarity gene
E) maternal effect gene


C

Biology & Microbiology

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The highest level of the hierarchy of life is the ____

a. population b. biosphere c. ecosystem d. multicellular organism e. cell

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The mechanism of prokaryotic growth, DNA replication, and cell division resulting in two identical

daughter cells is called ____.

a. mitosis b. meiosis c. binary fission d. budding e. zygote formation

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One of the most common causes of intellectual disability in the United States is ____

a. congenital rubella syndrome b. cocaine addiction c. fetal alcohol syndrome d. the use of thalidomide by pregnant women e. the use of tetracycline by pregnant women

Biology & Microbiology

Which one of the following ions outside the neuron would make it very difficult for a depolarization to occur?

A) potassium B) sodium C) chloride D) manganese

Biology & Microbiology