Seth tests some objects against each end of a bar magnet. One object he tested is attracted to both ends of the magnet. Which item is MOST LIKELY the object Seth tested?
A) battery
B) iron needle
C) plastic spoon
D) another bar magnet

Creation of an unnaturally uniform sample to represent a diverse populationcan be avoided by: a. including only willing b. asking another scientist for .c. choosing only identical participants.d. selecting individuals at random.

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?