Ectomycorrhizae, associations in which the fungal hyphae surround but do not penetrate the cell walls of the plant roots, usually involve
A. ascomycetes.
B. basidiomycetes.
C. zygomycetes.
D. ascomycetes and basidiomycetes.
E. ascomycetes and zygomycetes.
B. basidiomycetes.
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The anterior-posterior orientation of Drosophila embryos is initially controlled by ____
a. maternal effect genes b. gap genes c. pair rule genes d. segment polarity genes e. homeotic genes
Why are scientists separating the protists into several different groups?
What will be an ideal response?
Which involves adaptive cell-mediated immunity?
A. a neutrophil killing a bacteria by direct cell-to-cell contact B. a cytotoxic T cell destroying a virus-infected cell C. antibodies produced that destroy an invading pathogen D. a neutrophil killing a bacteria by direct cell-to-cell contact, and a cytotoxic T cell destroying a virus-infected cell E. a cytotoxic T cell destroying a virus-infected cell, and antibodies produced that destroy an invading pathogen
Carbon dioxide (CO2 ) is released during which of the following stages of cellular respiration?
A) glycolysis and the oxidation of pyruvate to acetyl CoA B) oxidation of pyruvate to acetyl CoA and the citric acid cycle C) oxidative phosphorylation and fermentation D) fermentation and glycolysis