In phytoremediation, plants are used to remove ________ and ________ from the soil
A) carbon… heavy metals
B) radioactive isotopes… heavy metals
C) nitrogen… phosphorus
D) water… sulfur
B
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This sequence of questions should help students understand how microbes were historically characterized and classified, how technology changed our perception of the microbial world,
the assumptions scientists made about prokaryotes, the unique features of archaea that distinguish this group of microorganisms from bacteria, and how fossils impact on our understanding of prokaryotic evolution on Earth. Prior to the advent of DNA sequencing technology and its application to the study of bacterial diversity and phylogeny, traditional taxonomic methods succeeded in characterizing thousands of bacterial species. As mentioned in the text, the cultured species represented less than 1% of the total number of bacterial species in nature. Knowledge of the nucleotide sequence for the gene encoding the small subunit of the ribosomal RNA (rRNA) provides little information about the metabolic capabilities of microorganisms found in soil and seawater other than what can be inferred from sequence similarity to 16S rRNA genes from cultured species. A. true B. false
The centrosome is a specialized region of the kinetochore.
a. true b. false
A molecule that consists only of carbon and hydrogen atoms is called a _______________.
A. hydrocarbon B. nucleic acid C. sugar D. starch E. carbon
Geographical allopatry between species is definitive evidence of interspecific competition.
Answer the following statement true (T) or false (F)