An example of a hydrogenous sediment is:

a. diatomaceous ooze.
b. siliceous ooze.
c. manganese nodules.
d. calcareous ooze.
e. coccolithophore ooze.


C

Biology & Microbiology

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Results from the study of globin variants indicate that ____

a. all amino acid substitutions cause severe phenotypic effects b. a change in a single nucleotide is sufficient to cause a genetic disorder c. extended chains of phosphorus molecules function to carry oxygen

d. all of the changes in globin are due to changes in amino acid sequences e. sickle cell anemia is not primarily an inherited disease

Biology & Microbiology

Treadmilling of actin filaments only occurs in a test tube.

a. true b. false

Biology & Microbiology

Which of the following trace elements needed by humans is commonly added to table salt?

A) iodine B) iron C) magnesium D) fluoride

Biology & Microbiology

A(n) ________ occurs when a gametophyte generation alternates with a sporophyte generation.

What will be an ideal response?

Biology & Microbiology