Most protein synthesis happens on the surface of the ___________

A. rough endoplasmic reticulum D. mitochondrion
B. smooth endoplasmic reticulum E. nucleus
C. Golgi complex


A

Biology & Microbiology

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placement of the phylum Platyhelminthes in the phylogenetic tree differs between a morphologically based phylogeny and a molecular based phylogeny. Which of the following statements best describes the interpretation based on molecular phylogeny?

A. Modern Platyhelminthes do not have a coelom but did originate from an ancestor that had one. B. The Platyhelminthes clade separated from other clades before coeloms evolved and consequently Platyhelminthes have never had a coelom. C. Platyhelminthes originated from ancestors with a coelom and have retained it to the present time. D. Platyhelminthes evolved from an ancestor without a coelom but developed one during the course of their evolution. E. Some Platyhelminthes have a coelom but others do not and it is difficult to conclude anything about its evolution within the clade.

Biology & Microbiology

The animal(s) often associated with Salmonella strains is/are

A. turtles. B. iguanas. C. baby chickens. D. ducks. E. All of the choices are correct.

Biology & Microbiology

The equalization of pressures between the ear and throat is made possible by the

a. pharynx. b. Eustachian tube. c. cupula. d. semicircular canals. e. round window.

Biology & Microbiology

The first multicellular organisms (algae) appeared about __________ billion years ago. 

A. 1 B. 1.8 C. 3.5 D. 13

Biology & Microbiology