M250 EXAM 4 2026 ACTUAL TEST PAPER ANSWERS COMPLETE GRADED A+

M250 EXAM 4 2026 ACTUAL TEST PAPER
ANSWERS COMPLETE GRADED A+

⩥ How does electron microscopy compare to light microscopy?.
Answer: Higher magnification and much higher resolution


⩥ Which type of microscope uses electrons?.
Answer: Electron microscope


⩥ What is the main difference between prokaryotic and eukaryotic
cells?.
Answer: Eukaryotes have a nucleus; prokaryotes do not


⩥ Are bacteria prokaryotic or eukaryotic?.
Answer: Prokaryotic


⩥ Are fungi prokaryotic or eukaryotic?.
Answer: Eukaryotic


⩥ Are protozoa prokaryotic or eukaryotic?.
Answer: Eukaryotic

,⩥ Are viruses cellular or non‑cellular?.
Answer: Non‑cellular


⩥ What is the correct order of taxonomic classification?.
Answer: Domain, Kingdom, Phylum, Class, Order, Family, Genus,
Species


⩥ How many kingdoms are in Whittaker's system?.
Answer: Five


⩥ Which kingdoms are prokaryotic in Whittaker's system?.
Answer: Monera


⩥ What are protists?.
Answer: Mostly unicellular eukaryotes


⩥ What criterion did Whittaker use for classification?.
Answer: Cell structure and mode of nutrition


⩥ What criterion did Woese use for classification?.
Answer: rRNA sequences

, ⩥ What are the three domains of life?.
Answer: Bacteria, Archaea, Eukarya


⩥ Which domains are prokaryotic?.
Answer: Bacteria and Archaea


⩥ Which domain is eukaryotic?.
Answer: Eukarya


⩥ What is binomial nomenclature?.
Answer: Two‑part scientific naming system


⩥ How is a scientific name written correctly?.
Answer: Genus capitalized, species lowercase, italicized


⩥ What does sterile mean in microbiology?.
Answer: Free of all living organisms


⩥ Why are endospores the gold standard of sterility?.
Answer: They are extremely resistant


⩥ Who first observed microorganisms?.