WorksheetsChapter 28.
Total questions: 10
Worksheet time: 15mins
Cyanobacteria are?
Primary producers.
Consumers.
Herbivores.
Decomposers.
More than one of the above.
Which of the following is false?
Culture techniques are an accurate way of determining which members in a microbial community are most common.
Fluorescence in situ hybridization (FISH) can be sued to distinguish subsets of prokaryotes that contain a specific nucleotide sequence.
Taxonomic diversity of prokaryotes can be studied by examining 16S rRNA sequences.
Studying the genome of one organims can give insights into the characteristics of another.
Which of the following Paris that relate to aquatic environments does not match?
Oligotrophic---O2 poor.
Hypoxic----O2 poor.
Epilimnion---O2 poor.
Hypolimnion---Lower layer.
Eutrophic---Nutrient rich.
Adding high levels of nutrients to a lake or inshore area would have all of the following in that environment except?
Death of calms and crabs.
Increased growth of heterotrophic microbes.
Increased growth of photosynthetic organism.
Increased levels of dissolved O2-.
Which of the following is not a matching pair?
Soil--minimal biodiversity.
Bacillus---endospores.
Streptomyces--geosmin production.
Fungi--lignin degradation.
Rhizosphere--soil that adheres to plant root.
Atmospheric nitrogen can be used?
Directly by all living organisms.
Only by aerobic bacteria.
Only by anaerobic bacteria.
In symbiotic relationships between rhizobia and plants.
In photosynthesis.
Which process converts ammonium (NH4+) into nitrate (No3-)?
Nitrogen fixation.
Ammonification.
Nitrification.
Denitrificatoin.
Anammox.
Energy for ecosystems can come from?
Sunlight via photosynthesis.
Oxidation of reduced inorganic chemicals by chemoautotrophs.
Sunlight via photosynthesis & Oxidation of reduced inorganic chemicals by chemoautotrophs.
Mycorrhizas represent associations between plant roots and microorganism that?
Are antagonistic.
Help plants take up phosphorus and other nutrients from soil.
Involve algae in the association with plant roots.
Form nodules on the plant's leaves.
Lead to the production of antibiotics.
In symbiotic nitrogen fixation by rhizobia and legumes?
The amount of nitrogen is much greater than by non symbiotic organism.
Neither the bacteria nor the legume can exist independently.
The bacteria enter the leaves of the legume.
The bacteria operate independently of the legume.
