Which group of protists consumes CO2 and produces O2 for much of Earth, serving as the base of food webs in lakes, streams, and the oceans?
A. algae
B. radiolarians
C. amoeba
D. protozoa
E. slime mold
A. algae
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Answer the following statements true (T) or false (F)
1. Strains of Staphylococcus aureus known as MRSA are resistant to methicillin, but are susceptible to most other antibacterial agents. 2. Bacteria can develop resistance to a particular antimicrobial agent as a result of a chromosomal mutation or the acquisition of a new gene. 3. A bacterial cell that receives an R-factor becomes multidrug resistant. 4. A “superinfection” is an infection that cannot be cured. 5. Using two different antimicrobial agents to treat a patient's infection is referred to as antagonism if the result that is achieved is much better than that which could have been achieved using only one of the drugs.
Organisms that demonstrate type I
survivorship are characterized by a. high r, small offspring. b. low r, small offspring. c. low r, large offspring. d. high r, large offspring. e. low r, large population size
Only 20% of cells in the human nervous system are neurons, and the rest are cells that support and protect neurons called ________ cells
Fill in the blank(s) with correct word
Who is responsible for building the first simple microscope?
Isaac Newton The Royal Society of London Antoni van Leeuwenhoek Louis Pasteu