What endogenous process helps plants to keep their movements and other responses synchronized with the environment?  

A.  purine monitoring
B.  solar tracking
C.  a circadian clock
D.  auxin cycling
E.  gravitropism


C.  a circadian clock

Circadian rhythms relate the day-night cycle to the eukaryotic organism that has them.

Biology & Microbiology

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What type of bond joins neighboring water molecules

Biology & Microbiology

What is the function of erythrocytes?

a. carry oxygen b. form clots c. fight off infections d. produce blood cells e. secrete erythropoietin

Biology & Microbiology

Systems biology is also called integrative biology

__________________ Indicate whether the statement is true or false.

Biology & Microbiology

Short chain proteins and _______________ are the end products of protein digestion that can be taken up by the absorptive cells of the small intestine.

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

Biology & Microbiology