What internal process helps plants to keep their movements and other responses synchronized with the day-night cycle?

A. Auxin cycling
B. Gravitropism
C. A circadian clock
D. Purine monitoring
E. Solar tracking


Answer: C

Biology & Microbiology

You might also like to view...

In an XX embryo, ____ inactivation of one X chromosome usually occurs when the embryo has about 32 cells

a. phenotypic b. inhibited c. cascading d. selective e. random

Biology & Microbiology

The three main groups of known organisms include (select all that apply):

A. Bacteria. B. Archaea. C. Eukaryotes. D. Fungi. E. Prokaryotes.

Biology & Microbiology

A gene has been discovered in a eukaryote that is identical to a gene of a bacterium that the eukaryote normally engulfs and digests. This is probably due to

A. horizontal evolution. B. vertical evolution. C. convergent evolution. D. horizontal gene transfer.

Biology & Microbiology

Which of the following is a molecule that stimulates a response in the immune system?

a. MHC class II molecules b. Immunoglobins c. Antigens d. Interferons

Biology & Microbiology