A fossil is defined as any evidence of an organism from

A. at least 500 years ago.
B. at least 1000 years ago.
C. at least 25,000 years ago.
D. at least 10,000 years ago.
E. at least 100,000 years ago.


Answer: D. at least 10,000 years ago.

Biology & Microbiology

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What technique can be used to identify a proteins function?

A. Functional protein microarray B. Antibody microarray C. DNA microarray D. RNA microarray

Biology & Microbiology

Place the basic steps involved in a molecular hybridization assay in sequence from first to last in the order in which they would be performed

a. Heating sample to obtain single-stranded target nucleic acid, hybridization of target to probe, detection of hybridization, labe-ling of probe b. Labeling of probe, heating sample to ob-tain single-stranded target nucleic acid, hybridization of target to probe, detection of hybridization c. Hybridization of target to probe, detection of hybridization, labeling of probe, heating sample to obtain single-stranded target nucleic acid d. Hybridization of target to probe, labeling of probe, heating sample to obtain sin-gle-stranded target nucleic acid, detection of hybridization

Biology & Microbiology

The spread of endospores in the US in 2001 was declared an act of bioterrorism when cases of ______ suddenly increased within the human population

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which of the features listed below is not found in all cells?

A) Cytoplasmic membrane B) Ribosomes C) DNA D) Nucleus

Biology & Microbiology