Which of the following cells contain a plasma membrane?
A) Animal cells only
B) Animal cells and plant cells only
C) Animal cells, plant cells, and bacterial cells
D) Bacterial cells only
C
You might also like to view...
When yeast cells of opposite mating types are in close proximity, cell changes occur inside those cells that result in the polymerization of actin filaments, allowing the yeast cells to mate
Those changes in cell behavior are initially due to signaling molecules (pheromones) released by the yeast cells. Pheromones are A) a type of steroid hormone that diffuses through the plasma membrane causing cytoplasmic actin proteins to form filaments B) a type of hormone that binds cell surface receptors causing cytoplasmic actin proteins to form filaments C) signaling molecules that bind cell surface receptors causing yeast cells to become motile, insuring mating success D) signaling molecules that cause the extracellular matrix of yeast cells to thicken in preparation for cell fusion E) signaling molecules that cause intracellular G proteins to be inhibited
Fungal hyphae in which two genetically distinct kinds of nuclei occur together are said to be __________.
Fill in the blank(s) with the appropriate word(s).
Which tissues are correctly matched to their progenitor germ layer? (Check all that apply.)
_____ ectoderm—lining of the digestive tract _____ ectoderm—epidermis _____ endoderm—lining of the respiratory tract _____ endoderm—muscles _____ mesoderm—blood vessels _____ mesoderm—gonads
Which of the following normally leads to the production of functional messenger RNA in eukaryotic cells?
(A) A decrease in the rate of ribosome synthesis (B) The removal of portions of RNA known as intervening sequences (introns) (C) A decrease in RNA polymerase activity (D) The replication of new messenger RNA molecules from existing messenger RNA molecules