Biramous appendages in arthropods are only present in:

A. crustaceans.
B. horseshoe crabs.
C. insects.
D. arachnids.
E. centipedes


A

Biology & Microbiology

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Organisms that have their optimum growth pH between 8.5 and 11.5 are called ________.

Fill in the blank(s) with the appropriate word(s).

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Vertebrate bone consists primarily of a crystalline mixture of 

A. Ca2+; SO4?2. B. Na+; Cl?. C. Ca2+; Cl2. D. Ca2+; PO4?2. E. Adenosine, PO4?2.

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Bacteria protect themselves from bacteriophage infections by producing restriction enzymes that cut

up foreign RNA of the phage. ____________________ Indicate whether the statement is true or false.

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Which disorder is characterized by a lack of the protein dystrophin?

A) hemophilia B) color-blindness C) muscular dystrophy D) Down syndrome E) cystic fibrosis

Biology & Microbiology