________ is the process by which internal and external structures of cells and organisms are preserved and maintained in position.

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


Fixation

Biology & Microbiology

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Which of the following steps is not one of the phases of a fungal invasion of a plant?  

A.  Windblown fungal spores land on plant leaves. B.  Hyphae grow through cell walls and press against the cell membrane. C.  Fungal DNA is replicated by the plant cells. D.  Hyphae differentiate into specialized structures called haustoria. E.  A fungal spore germinates and forms an adhesion pad that allows it to stick to a plant's leaf.

Biology & Microbiology

Hensen's node is located:a

in the walls of the archenteron. b. at the end of the primitive streak. c. on the outer side of the chorion. d. inside a blastomere. e. inside the neural groov

Biology & Microbiology

To join a fragment of human DNA to bacterial or yeast DNA, both the human DNA and the bacterial or yeast DNA must first be treated with the same

A) DNA ligase. B) DNA gyrase. C) restriction enzyme. D) DNA polymerase.

Biology & Microbiology

Which of the following represents an abnormal electrolyte serum level?

A) Sodium, 140 mEq/L B) Potassium, 6 mEq/L C) Calcium, 9.5 mEq/L D) Magnesium, 1.7 mEq/L

Biology & Microbiology