How do cells in the body of a multicellular organism communicate with each other?
a. by way of signaling molecules that interact with specific receptors
b. through long projections that directly connect cells to each other
c. through electrical signals passed within a cell
d. by the transport of ions between cells in different parts of the organism
e. by the transport of ions in water
A
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Influenza virus targets
A) respiratory epithelium. B) gastrointestinal cells. C) oral cavity cells. D) throat epithelium.
The organisms that causes toxic shock syndrome is ________.
A. Lactococcus lactis B. Streptococcus pneumoniae C. Staphylococcus aureus D. Staphylococcus epidermidis
Which of the following statements about ecological
succession is false? a. A disturbed area within a community may recover quickly if improved soil remains. b. Pioneer species are the start of community structure. c. The wastes and remains of early colonizers favor the survival of new species. d. Secondary succession occurs on a new volcanic island. e. Later successional species outcompete earlier species.
Fungal spores are common allergens that cause hypersensitivities.
Answer the following statement true (T) or false (F)