Describe the symbiotic relationship between zooxanthellae and their hosts. How do both benefit from the relationship?
What will be an ideal response?
Zooxanthellae supply their hosts with food from their photosynthetic process. In return, the host provides shelter, nutrients such as nitrates and phosphates, and carbon dioxide, which are all needed by the zooxanthellae for their photosynthesis. In addition, the hosts ensure that the zooxanthellae have access to sunlight by remaining near the surface of the ocean.
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Substances that cannot be broken down into simpler substances are called ____________.
A. neutrons B. elements C. compounds D. protons
Staphylococcus aureus is a gram-positive organism that produces the enzyme ?-lactamase, which renders certain types of antibiotics inactive. The mode of action that is prevented in certain antibiotics sensitive to this enzyme is:
a. cell wall synthesis. b. protein synthesis to the 30S ribosomal subunit. c. protein synthesis to the 50S ribosomal subunit. d. deoxyribonucleic acid (DNA) synthesis.
What is the most extensive surgery for breast cancer is?
A. Modified radical mastectomy B. Radical mastectomy C. Simple mastectomy D. Lumpectomy
Which statement best describes the function of NADH and FADH2?
a. Both produce ATP by substrate-level phosphorylation. b. Both transport acetyl-CoA to mitochondria. c. Both provide electrons to the electron transfer system. d. Both release energy for glycolysis to proceed.