The rough endoplasmic reticulum and mitochondria evolved from the same evolutionary pathway.

a. true
b. false

Answer: b. false

Biology & Microbiology

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All of the following are general components of the growth factor signaling pathway EXCEPT

A. tyrosine kinase-linked receptor. B. GRB2-Sos-Ras complexes. C. phosphorylated transcription factors. D. Raf-1. E. IP3 and Ca2+.

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Which of the following are NOT components

of the appendicular skeleton? a. arm bones b. collarbones c. finger bones d. ribs e. leg bones

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The part of the brain that receives sensory input from joints and muscles concerning the position of the body and its parts is the

A. cerebrum. B. cerebellum. C. pons. D. hypothalamus.

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What are the two halves of a duplicated chromosome called?

A) alleles B) centromeres C) homologous chromosomes D) sister chromatids

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Biology & Microbiology