Innate immunity is not effective against fungus infections.
Answer the following statement true (T) or false (F)
False
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The cell wall of Gram-negative organisms
A. has a thick peptidoglycan layer. B. has a thin peptidoglycan layer. C. is more permeable to various molecules than the Gram-positive cell wall. D. is characterized by an outer membrane containing LPS. E. has a thin peptidoglycan layer AND is characterized by an outer membrane containing LPS.
An increase in which of the following will increase the rate of diffusion?
a. Temperature b. Solvent density c. Molecule mass d. Number of proteins
What key research question was addressed by King and others while studying sponges?
A. Do the genes of sponges contain information that might explain the rapid evolution of animal groups during the Cambrian explosion? B. How similar is the DNA of living marine sponges to that of fossil sponges from the Cambrian? C. Why were the sponges an evolutionary dead end, with little change and diversity since the Cambrian? D. Did sponges survive the precambrian mass extinction, with genes unique from other animal groups? E. Were the sponges the last common ancestor of eumetazoans?
During gas exchange, body cells
A) take up CO2 and release O2. B) release O2 to red blood cells. C) increase in size to accommodate the reuptake of O2. D) release CO2 and take up O2.