Michelle is observing a sand sample under a microscope when she finds many perforated shelled organisms. further testing reveals that these shells are made of calcium carbonate. how should she classify these organisms?

a. they are sarcodines, belonging to phylum heliozoa of protozoa.
b. they are radiolarians, belonging to phylum ciliata of protozoa.
c. they are foraminiferans, belonging to phylum sarcodina of protozoa.

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Which enzymes break down carbohydrates?