Plant cells assimilate nitrogen in the form of:

a. ammonia and N2
b. N2 and nitrite
c. nitrate and ammonia
d. urea and nitrate
e. N2 and urea


c

Biology & Microbiology

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What type of cells are joined end-to-end, conduct water and are connected to each other with strips of wall material?  

A.  sieve cells B.  tracheids C.  sieve tube members D.  vessel members E.  companion cells

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What characteristics do many deep-sea fish have regarding their eyes? a. They have spheroid eyes and one retina

b. They have tubular shaped eyes and one retina. c. They have tubular shaped eyes and two retinas. d. They have spheroid eyes and two retinas.

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In a completed Gram stain, gram-negative bacteria are colorless

Indicate whether the statement is true or false

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An important source of vitamin K in the intestine comes from which species?

A) Helicobacter pylori B) Streptococcus mutans C) Vibrio cholerae D) Giardia lamblia E) Escherichia coli

Biology & Microbiology