What is the function of the Z ring in binary fission?
A. It controls the replication of DNA.
B. It forms a contractile ring at the septum.
C. It separates the newly synthesized DNA molecules.
D. It mediates the addition of new peptidoglycan subunits.
Answer: B. It forms a contractile ring at the septum.
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Which of the following statements is FALSE
about cowbirds? a. Their host relationship is similar to cuckoos. b. They are insect-eaters. c. Females can lay thirty eggs in a season. d. Cowbird hatchlings are recognized as imposters by host parents. e. They now parasitize at least fifteen species of native North American birds
To date, humans have interfered with all of the biogeochemical cycles on Earth, but this interference has been of the
greatest magnitude, in terms of human-induced changes in climate, in the:a. hydrologic cycle. b. nitrogen cycle. c. carbon cycle. d. sulfur cycle. e. phosphorus cycle.
Which of the following classes of amino acids is buried within the folded structure of the protein?
a. Acidic b. Basic c. Nonpolar d. Polar
Gram-negative bacteria do not have peptidoglycan in their cell walls.
Answer the following statement true (T) or false (F)