Why do cyanobacteria possess heterocysts? View Available Hint(s) for Part A Heterocysts shield the organism's nitrogen fixation enzymes from oxygen. Heterocysts serve as a primitive nucleus in these bacteria. Heterocysts are reproductive structures similar to endospores in other bacteria. Bacterial photosynthetic pigments are located in heterocysts.

Why do cyanobacteria possess heterocysts? View Available Hint(s) for Part A Heterocysts shield the organism's nitrogen fixation enzymes from oxygen. Heterocysts serve as a primitive nucleus in these bacteria. Heterocysts are reproductive structures similar to endospores in other bacteria. Bacterial photosynthetic pigments are located in heterocysts.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter24: Fungi

Section: Chapter Questions

Problem 20RQ: Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: the...

See similar textbooks

Similar questions

Multicellular organisms with a true nucleus, ester-linked fatty acids in their G-3-P cell membranes, histone proteins, and cell walls with a high cellulose content (above 20%), but no collagen, must be: members of kingdom Archaeobacteria members of kingdom Eubacteria members of kingdom Animalia members of kingdom Plantae members of kingdom Fungi
. The light-sensitive, protein component of the complex which pumps hydrogen ions out of the cell when exposed to sunlight (from the halophilic archaeobacterium Halobacterium halobium) is called: the photosynthetic reaction center bacteriorhodopsin retinal cytochrome c bacteriochlorophyll
Comparing and Contrasting Bacterial Shapes The bacillus (rod-shaped), spirillum (corkscrew-shaped), and coccus (round). Describe the difference between these bacteria, and compare them to one another and to the Anabaena. What do the three shapes of the bacteria represent the separate taxonomic groups? What is the ecological and economic importance of these bacteria? Are all bacteria harmful?
Raw red alga of the genus Porphyra is part of a traditionalJapanese diet. This alga is rich in porphyran, a polysaccharide that human digestive enzymes cannot break down. Marine bacteria that live on the alga produce a porphyran-digesting enzyme. In Japan, a homologousenzyme is common in one species of intestinal bacteria. Outside of Japan, people have the same species of intestinal bacteria, but they do not have the gene for the porphyran-digesting enzyme. The marine bacteria andthe intestinal bacteria are not close relatives, so they mostlikely did not inherit the enzyme from a shared ancestor.Propose a scenario to explain the observed distributionof the enzyme.
Yes, but Kelper 28, is a unicellular, carbon based, eukaryotic organism so how is chemosynthesis possible?
Some prokaryotes, especially archaea, are capable of living in extreme environments, such as deep-sea vents, where temperatures can reach 80°C (176°F). Few organisms can survive at this temperature. What adaptations might archaea possess that allow them to survive in such extreme heat?
Name bacteria a, b and c. How do plants obtain their nitrogen? How do animals obtain their nitrogen? Name two plants that have nodules on their roots. Name the three ways atmospheric nitrogen can be changed to nitrates. Why do all livings things need nitrogen? In what type of environmental conditions do bacteria B thrive in?
The bacteria which oxidize various inorganic substancesand use the released energy for the synthesis of food arecalled _______________.(a) Archaebacteria(b) Heterotrophic bacteria(c) Photosynthetic autotrophic bacteria(d) Chemosynthetic autotrophic bacteria Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.
The genus Ferroplasma consists of a few species of acid-loving archaea. One species, F. acidarmanus, was discovered to be the main component of slime streamers (a type of biofilm) deep inside an abandoned California copper mine (Figure 4.11A). F. acidarmanus cells use an ancient energy-harvesting pathway that combines oxygen with ironsulfur compounds in minerals such as pyrite. This reaction dissolves the minerals, so groundwater that seeps into the mine ends up with extremely high concentrations of metal ions such as copper, zinc, cadmium, and arsenic. The reaction also produces sulfuric acid, which lowers the pH of the water around the cells to zero. Despite living in an environment with a composition similar to hot battery acid, F. acidarmanus cells maintain their internal pH at a cozy 5.0. Thus, researchers investigating Ferroplasma metabolic enzymes were surprised to discover that most of the cells enzymes function best at very low pH (Figure 4.11B). A. Deep inside one of the most toxic sites in the United States: Iron Mountain Mine, in California. The water in this stream, which is about 1 meter (3 feet) wide in this photo, is hot (around 40C, or 104F), heavily laden with arsenic and other toxic metals, and has a pH of zero. Slime streamers growing in it are a biofilm dominated by a species of archaea, Ferroplasma acidarmanus. B. pH profiles of four enzymes isolated from F. acidarmus. Researchers had expected these enzymes to function best at the cells cytoplasmic pH (5.0). What does the dashed line signify?
Figure 13.6 Which of the following statements is true? a. Gram-positive bacteria have a single cell wall formed from peptidoglycan. b. Gram-positive bacteria have an outer membrane. c. The cell wall of Gram-negative bacteria is thick, and the cell wall of Gram-positive bacteria is thin. d. Gram-negative bacteria have a cell wall made of peptidoglycan, while Gram-positive bacteria have a cell wall made of phospholipids.
Yeast is a facultative anaerobe. This means that alcohol fermentation takes place only if: the temperature is close to 37°C the atmosphere does not contain oxygen sugar is provided to the cells light is provided to the cells
Bacteria in the α-proteobacterial _______ clade are the most abundant organisms on Earth and demonstrate unique adaptations to life in the oligotrophic open ocean.