Jon is researching the oxygenation of Earth's atmosphere. Which unicellular organism do biologists consider to be the main contributor to that process?

A. paramecia

B. amoebae

C. dinoflagellate

D. cyanobacteria

Answer is D. cyanobacteria

The rest of plays movement can be seen at

Which city has the greatest wind velocity

Which of the following correctly describes the series of events occurring during a parasympathetic nervous system response? a. Stimulation of cranial regions; cranial root ganglion; acetylcholine release b.

A trout eats smaller fish and insects. It is eaten by hawks and bears. What trophic level does it belong to? * Producer primary consumer secondary consumer tertiary consumer

What is the variable that responds to the manipulated, or changed, variable?

Wich can modern taxonomy do

A nurse is caring for a patient who has been receiving a drug by the intramuscular route but will receive the drug orally after discharge. how does the nurse explain

What patterns are observed in the organization and distribution of matter in the universe

The speed of sound is at 300 feet below the sea than at 200 feet. slower faster

The taxonomic classification category that contains the least number of different organisms is __. family species kingdom domain Biological Taxonomy is the science of a.) naming everything b.) comparing the molecular clocks between organisms c.