Which role of protists has the most positive effect on maintaining the plant population in an ecosystem? A. Protists are a major food source for animals.
B. Protists produce approximately 75 percent of the oxygen on Earth.
C. Protists decompose dead materials, returning nutrients to the soil.
D. Protists found in the gut of animals assist in digestion.

Refer to the family pedigree shown here. in generation i, one parent is affected by the gene mutation and one parent isn't. in generation ii, all three children are affected by the gene mutation. what can you conclude about this gene mutation? a. all children born in future generations will be affected by this disorder. b. this gene mutation is a dominant disorder. c. this gene mutation is a recessive disorder. d. the generation i mother is a carrier of this gene mutation.