25 Questions
What is the main characteristic of a plasmid?
Has an origin of replication
Who is credited with coining the term 'plasmid'?
Joshua Lederberg
What type of enzymes are used in the construction of plasmids?
Restriction enzymes
What is the function of a selectable marker in a plasmid?
Identifying transformed cells
In what process can a plasmid be integrated into a host bacterium?
Integrating (episomes)
What is the main outcome of natural selection when resources are limited?
'Stronger' individuals outcompete others
What distinguishes cyanobacteria from other bacteria?
They are oxygen producers
How do most bacteria grow and divide?
By binary fission
Which type of protozoa moves using flagella?
Mastigophora
What is the main role of heterocysts in cyanobacteria?
Nitrogen fixation
Which domain includes all unicellular and prokaryotic organisms not classified as Archaea?
Bacteria
What is the distinguishing characteristic of mesophilic archaea?
Live in habitats supporting most bacteria and eukaryotes
What is an adaptive trait?
Any genetic characteristic that increases an organism's chance of survival
What did Louis Pasteur's experiment with the swan-necked flask disprove?
The theory of spontaneous generation
What key breakthrough helped cure millions of infectious diseases?
Discovery of antibiotics
What is a unique feature of methanogens among archaea?
Ability to produce methane
What did the smallpox vaccine achieve?
It eradicated smallpox completely
How do members of the domain Archaea differ from those in Bacteria and Eukarya?
They possess unique cell membrane compositions
What is the main reason why algae are not classified as true plants?
Lack of vascular tissues
Which of the following is NOT a characteristic of algae?
Embryo formation after fertilization
What can be a consequence of overgrowths of algal populations in water bodies?
Harmful algal blooms
What is the main role of protozoan organisms in the environment?
Contributing to soil fertility
How are multicellular algae structured?
Contain thallus, holdfast, and stipe structures
What is the main photosynthetic pigment found in algae?
Chlorophyll
Why are algae classified along with plants during taxonomy?
Ability to carry out photosynthesis
Explore the world of archaea, including extremophiles like hyperthermophiles, halophiles, and acidophilic archaea. Learn about mesophilic archaea and their habitats. Discover the important roles archaea play in biochemical cycling and human health.
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