Phyla Ascomycota and Basidiomycota are considered ____ because they share a more recent common ancestor with

each other than either does with any other group.
a. sister taxa
b. homoplastic
c. homologous
d. paraphyletic
e. monophyletic


a

Biology & Microbiology

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G protein-linked receptors are transmembrane proteins that convert a(n) extracellular hormone signal into an

intracellular signal that affects certain cell processes. Indicate whether the statement is true or false.

Biology & Microbiology

Which statements about the complement system of vertebrates are correct? (Check all that apply.) 

_____ The complement system is a part of the immune system of vertebrates. _____ The complement system consists of approximately 30 different proteins that circulate in the plasma. _____ If these proteins encounter the cell wall of a bacteria or fungi they form aggregations and eventually produce a pore that leads to the destruction of the invading cells. _____ Although complement proteins attack invaders, they are not involved with histamine release. _____ The complement system produces antibodies to bind invading cells.

Biology & Microbiology

How many HLA haplotypes does each human have?

a. one b. two c. three d. four e. five

Biology & Microbiology

When homologous chromosomes cross over, what occurs?

A) Two chromatids get tangled, resulting in one re-sequencing its DNA. B) Two sister chromatids exchange identical pieces of DNA. C) Corresponding segments of non-sister chromatids are exchanged. D) Maternal alleles are "corrected" to be like paternal alleles and vice versa.

Biology & Microbiology