Design a complete ecosystem that would sustain a number of living organisms for several years in a sealed container
The only thing that can be added is sunlight. Explain why you have selected each organism. What will be an ideal response?
Concepts to Consider: Include producers (plant), consumers (animal), and decomposers (heterotrophic bacteria and fungi); plants convert sunlight to organic energy, animals
consume the plants, and decomposers recycle nutrients within the dead plants and animals;
animal and bacterial wastes are taken up by plants.
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Which of the following characteristics is not associated with cardiac muscle?
A) intercalated discs B) contracts spontaneously C) involuntary D) pointed ends E) striations
T cells are produced in the bone marrow but mature in the thyroid
Indicate whether the statement is true or false.
Biologic agents are:
A) synthetically manufactured and weaponized by mixing the synthetic component with an organism. B) least preferred by terrorists because they are difficult to disseminate over a large population. C) the ideal weapons of mass destruction if the terrorist's objective is to affect a small geographic area. D) naturally occurring organisms that are cultivated in a laboratory.
Viruses are lifelike structures that have characteristics of living cells with the exception of _______________.
A. a requirement for a host cell for replication B. nucleic acid transcription C. nucleic acid to transmit viral characteristics D. structural proteins