Lichens are formed by symbiotic relationshipsthat may involve any of the following except
A. green algae.
B. cyanobacteria.
C. protists.
D. sac fungi.
E. ascomycetes.
Answer: C
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In dry shrublands, ____
a. plants are adapted to episodes of fire b. primary production is abundant throughout the year c. there are constant cool temperatures throughout the year d. winters are mild and summers are wet e. precipitation occurs evenly year round
Any substance that triggers an immune response in the body is called a(n) ________
A) MHC marker B) memory cell C) antigen D) complement
A normal tidal volume at rest is approximately ________ mL.
A) 100 B) 500 C) 5000 D) 1000 E) 10,000
Differential gene expression is defined as the:a
ability of some cells to arrest their development under varying environmental conditions. b. progressive fixation of the fates of a cell's descendants. c. genetic variation found in various somatic cells of the same individual. d. regulation during development that varies the type and quantity of gene products among cells. e. constitutive expression of all genes in the somatic cells.