________ are soil dwellers; ________ are mostly marine; and ________ mostly inhabit fresh water
A) Earthworms; leeches; annelids
B) Earthworms; leeches; polychaetes
C) Earthworms; polychaetes; leeches
D) Polychaetes; earthworms; leeches
Answer: C
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Why is it necessary to take special safety precautions when using radioactivity?
A. Radioactive substances will ionize cells. B. Radioactive substances have the potential to cause damage to living cells. C. Radioactive substances decay. D. Radioactive substances will perforate plasma membranes.
The recombinant virus assay (RVA) uses which type of amplification methodology?
a. Transcription-mediated amplification (TMA) b. Nucleic acid sequence-based amplification (NASBA) c. Strand displacement amplification (SDA) d. Reverse transcription polymerase chain reaction (RT-PCR)
In phloem movement, ____ does not serve as a source
a. photosynthesizing cells in a leaf b. roots c. photosynthesizing cells in a stem d. food storage cells in a stem e. soil
Specific segments of DNA that are the functional units of inheritance are called ________
A) genes B) telomeres C) chromatids D) chromosomes