Name a bacterium that lives in the root nodules of the leguminous plants.

What are finger-like projections in Amoeba known as?

The binomial system of naming organisms was given by

1. Carolus Linnaeus.
2. Charles Darwin.
3. Gregor Mendel.
4. Carl Moyer.

The largest unit of classification is

1. phylum
2. kingdom
3. species
4. genus