In the pressure flow theory, any part of a plant that does not carry out photosynthesis is a
A. source.
B. sink.
C. reservoir.
D. aqueduct.
E. companion cell.
B. sink.
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The role of a tumor suppressor protein in a cell is to
a. promote cell division of healthy cells. b. halt cell division in healthy cells experiencing difficulties in DNA replication. c. promote cell division of abnormal cells. d. trigger DNA replication in preparation for cell division. e. activate cyclin-dependent protein kinases.
The ________ in sperm whales is thought to play a part in the whale's echolocation system
a. rostrum b. ambergris c. spermaceti d. melon
Which of the following contains indigestible fiber, mucus, and dead microorganisms that are eliminated from the body?
A) Ghrelin B) Pancreatic juice C) Bile D) Chyme E) Feces
After a wound has healed, an enzyme called ________ is secreted to dissolve the clot
Fill in the blank(s) with correct word