Which of the following characteristics is most beneficial in an environment with limited nutrients? a. cilia b. pilus c. endospore d. exotoxin e. endotoxin
Endospore is a highly tough, durable & non reproductive type structure which produced from phylum firmictus.
When the available source of nutrients is low it helps to survive longer because it is stable in high temperature, high uv radiation etc
For eg gram positive bacteria
Which of the following characteristics is most beneficial in an environment with limited nutrients? a. cilia...
1) Without prokaryotes... a) much decomposition in the soil would stop b) PCR would be much more difficult to do c) plants would have fewer nutrients to absorb d) there would be less methane in the world e) all of the above would occur 2) Which is least likely associated with prokaryotes? a) nitrogen fixation b) botulism c) methane production d) total global photosynthesis 3) Genetic variation in bacterial populations cannot result from: a) transduction b) transformation c) conjugation d)...
which of the following nutrients has the most calories per gram?a. mineralsb. carbohydratesc. fatsd. proteine. vitaminsis it C
please answer all
6. If you observe rod-shaped, pink cells on a slide that had just been Gram stained, you can assume that the cell carries: Select one: a. Exotoxin. b. Endotoxin c. An endospore. d. Membrane lipid rafts. e. Sterols 7. The enzyme that is found in tears and saliva, can hydrolyze the peptide bonds cross-linking in the glycan chains of peptidoglycan. Select one: a. Nuclease b. Lysozyme c. Lysosome d. Penicillinase e. Peptidase 8. Plasmids in bacteria are:...
prokaryotes Bacilli Bacillus Capsule Chlamydias Cilia Cocci Endospore Fimbriae Flagella Glycocalyx Proteobacteria Pilli Bordatella Helicobacter Legionella Mycobacteria Neisseria Rhizobium Klebsiella Bifidobacterium Agrobacterium Gram-Negative or Positive Yersinia Lactobacillus Clostridium Plasma membrane Nucleoid Cell wall Cyanobacteria Spirochetes Treponema Trypanosoma 18. Sugary envelope that surrounds the cells (loosely or tightly) to promote attachment and prevent immune detection CS 19. Proteinaceous, sticky bristleb that can be used for attachment & biofilms. 20. If this structure connects the cytoplasm of two bacteria, one of the...
1) If you were given a microscope slide with a sample from a habitat rich in bacteria and nitrogen, you would expect to see.. a) peptidoglycan b) heterocysts c) filaments d) halophiles e) biofilms 2) A research ship catches a fish from the depths of the ocean. In the dark it glows. What are the prokaryotes doing in the fish? a) decomposing it b) providing bioluminescence c) fixing nitrogen d) photosynthesizing 3) Without prokaryotes... a) much decomposition in the soil...
Which of the following statements is true? 1 a. All cells need a highly acidic environment to function b. Long strands of human DNA coil into 10 pairs of chromosomes. e c. Most genes contain instructions for making fat molecules. d. Each cell's nucleus contains DNA. e. Cells do not need nutrients for their growth.
30. Which of the following uses cilia as its means of locomotion? a. Entamoeba b. Plasmodium C. Anopheles d Giardia e. Paramecium
Mucous membrane and cilia lining the respiratory tract fight microorganisms by: A. producing hydrochloric acid. B. trapping them. C. providing a barrier. D. removing nutrients. E. washing them away.
Adding nutrients to streams is beneficial to biological communities and is one way to improve water quality Select one: True False High levels of carbon dioxide and low levels of oxygen in water may indicate . . . Select one: a. high levels of bacterial growth b. high water temperature c. low levels of bacterial growth d. a healthy stream system High levels of nitrates and phosphates cause animals to die in streams by Select one: a. stimulating blooms of...
the following are all characteristics of members of the phylum hemichordata. which is the most primitive deuterostome characteristics as evidence by the fact that it is shared with chordates A. the pharyngeal slits B. a coelom divided into three cavities C. a dorsal neeve cord D. the well developed proboscis