Myxobacteria lyse bacteria and yeasts by secretion of digestive enzymes then use the resulting peptides and amino acids as a source of ________.
A. nitrogen
B. phosphate
C. iron
D. sodium
Answer: A
You might also like to view...
The most selective antibacterial agents are those that interfere with bacterial cell wall synthesis. This is because
A. bacterial cell wall synthesis is easily inhibited whereas eukaryotic cell wall synthesis is more resistant to the actions of the drugs. B. eukaryotic cells inactivate the drugs before they can do any damage. C. bacterial cell walls have a unique structure not found in eukaryotic host cells. D. eukaryotic cells do not take up the drugs.
Four of the following characteristics are required for the life of an individual organism to continue. Which is the
exception?
a. to maintain chemical uniqueness and organization b. to respond to stimuli c. to possess a genetic program to control cell processes d. to reproduce e. to evolve
When a moss spore lands on an appropriate site, it germinates into the first stage of the gametophyte called a(n)
A. prothallus. B. archegonium. C. antheridium. D. rhizoid. E. protonema.
Some nerves are myelinated, and others are not. Myelinated nerves send signals faster than unmyelinated neurons. Draw two neurons of equal length, and wrap segments of myelin along one. Be careful to leave spaces for the nodes of Ranvier. Now, measure
the exposed axons of each, and total up the distance. Describe why the myelinated neurons send signals faster. What will be an ideal response?