What is the most common compound in the cell walls of Gram positive bacteria?
Most Gram-positive bacteria have a relatively thick (about 20 to 80 nm), continuous cell wall (often called the sacculus), which is composed largely of peptidoglycan (also known as mucopeptide or murein).
Which of the following types of pathogenic prokaryotes cause cholera?
Vibrio cholerae is the bacteria that causes cholera.
What is the difference between an F+ donor and an HFR donor?
What is the difference between an F+ donor and an Hfr donor? The Hfr donor has an F factor integrated into its main chromosome, but the F+ donor does not. You just studied 30 terms!
How are archaea most similar to bacteria?
Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl. Explain the statement that both types, bacteria and archaea, have the same basic structures, but built from different chemical components. Both bacteria and archaea have cell membranes and they both contain a hydrophobic portion.
What type of organism is cholera?
Cholera is an acute diarrheal illness caused by infection of the intestine with Vibrio cholerae bacteria. People can get sick when they swallow food or water contaminated with cholera bacteria. The infection is often mild or without symptoms, but can sometimes be severe and life-threatening.
Which bacteria is responsible for cholera?
Cholera is an acute, diarrheal illness caused by infection of the intestine with the toxigenic bacterium Vibrio cholerae serogroup O1 or O139.
Do soil microorganisms protect against crop disease?
Soils are a rich source of microbes that are thought to help plants suppress pathogens by improving the health of the plant, induce natural plant defense, produce antibiotics, compete against pathogens, or hyperparasitize the pathogen (see succeeding text).
Why does conjugation between an Hfr strain?
Hfr strains have the F plasmid integrated into the chromosome. Why does conjugation between an Hfr strain and an F- strain not result in two Hfr strains? Conjugation is typically disrupted before the fertility factor can be transferred. Which of the following is a characteristic of an F+ cell?
What is the major difference between an F+ cell and an HFR cell?
The key difference between F+ strains and Hfr is that F+ strains have F plasmids in the cytoplasm freely without integrating into bacterial chromosomes while Hfr strains have F plasmids integrated to their chromosomes.Jun 6, 2017
How are organisms in the domains Bacteria and Archaea similar?
Similarities Between Them. Archaea and bacteria are both prokaryotes, meaning they do not have a nucleus and lack membrane-bound organelles. … Both archaea and bacteria have flagella, thread-like structures that allow organisms to move by propelling them through their environment.Dec 19, 2021
What are the similarities and differences between Bacteria and Archaea?
Similar to bacteria, archaea do not have interior membranes but both have a cell wall and use flagella to swim. Archaea differ in the fact that their cell wall does not contain peptidoglycan and cell membrane uses ether linked lipids as opposed to ester linked lipids in bacteria.
Which group of organisms ciliates animals or plants has the most complex cells?
protistsThe ciliates (phylum Ciliophora) is one of the largest groups of protists and contains those forms with the most complex cell structures.
How to apply parsimony to a phylogenetic tree?
To apply parsimony to constructing a phylogenetic tree, choose the tree that represents the fewest evolutionary changes, either in DNA sequences or morphology. The relative lengths of the frog and mouse branches in the phylogenetic tree in the figure below indicate that. the homolog has evolved more slowly in mice.
What is the function of anabaena?
Anabaena is a cyanobacterium with two types of cells. One type of cell can carry out photosynthesis and the other type can carry out nitrogen fixation. However, the oxygen produced by photosynthesis inhibits the enzymes for nitrogen fixation.
What are cell walls made of?
cell walls are made primarily of pepditoglycan. The following question refers to the figure. In this eight-year experiment, a population of E. coli, begun from a single cell, was grown in low-glucose conditions for 20,000 generations. Each culture was introduced to fresh growth medium every 24 hours.
Which is the oldest island in the world?
Kauai is the oldest and most northwestern big island. Hawaii is also closest to, and Kauai furthest from, the seafloor spreading center from which the Pacific plate originates, which lies about 5,600 km southeast of the island of Hawaii .
How do chemotrophs get energy?
chemotrophs obtain energy from chemicals and phototrophs obtain energy from light. A type of bacteria colonizes on the surface of a leaf, where it obtains nutrition from the leaf's nonliving, waxy covering without harming the plant, and inhibits the growth of other microbes that are plant pathogens.
Is a salamander a lizard?
Salamanders are a sister group to the group containing lizards, goats, and humans. Salamanders are more closely related to lizards than to humans. salamanders are a sister group containing lizards, goats, and humans.
What is a female fly?
A female fly, carrying fertilized eggs, is hypothetically swept by high winds to an island far out to sea. She is the first and only fly to arrive on this island. Thousands of years later, her numerous descendents occupy the island and have overlapping geographic ranges. They are separated into several different species with different foods, ...