Question

Choose the correct answer 1. Bacteria have a cell wall made up of polysaccharides and polypeptides. This helps scientists place them into groups. Another name for this chemical make up is the glycocalyx e. capsule b. pili d. peptidoglycan 2. Protists are part of the organisms that float on currents of water. They are a copepods c. plankton b. viruses d. none 3. Which organisms are able to fic nitrogen gas to make it usable for others? a fungi c. viruses b. bacteria d. beetles 4. Bacteria that live in extreme conditions belong in the domain 2. eukarya c. archae b. bacteria d. cyanophyta 5. Brown algae belong in the phylum a. chrysophyta b. phaeophyta c. rhodophyta d. chlorophyta 6. Coccus bacteria are 2. rod-shaped b. round c. spiral d. rectangular 7. Which organism is prokaryotic? a. E coli b. mushroom c. Plasmodium d. none 8. Agar, a medium used to grow bacteria is extracted from which group of algae? a. diatoms c. red b. brown d. green 9. What type of cell division do bacteria use? a. meiosis b. binary fragmentation c. binary fission d. mitosis 10. Which group of algae are probably the ancestors to all land plants? a. diatoms c. brown b. red d. green

pls help

Answer 1

1. a. glycocalyx

The glycocalyx is a carbohydrate-enriched coating that covers the outside of bacteria. Glycocalyx can be a factor used for the recognition of the cell. On bacterial cells, the glycocalyx provides a protective coat from host factors.

2. c. Plankton

Crysophytes. This group includes diatoms and desmids. They are found in fresh water as well as in marine environments. They are microscopic and float passively in water currents (plankton).

3. b. Bacteria

Nitrogen fixation is carried out naturally in soil by microorganisms termed diazotrophs that include bacteria such as Azotobacter and archaea.

4. c. Archae

Archaea are unicellular, prokaryotic microorganisms that differ from bacteria in their genetics, biochemistry, and ecology. Some archaea are extremophiles, living in environments with extremely high or low temperatures.

5. b. Phaeophyta

Phaeophyta or brown algae are a group of autotrophic, multicellular organisms, belonging to the class Phaeophyceae