Astudent is scratching a mineral on a white plate in science class. what property is this student testing?

a
luster

b
cleavage

c
color

d
streak

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

Which of the following is a common response to cell signaling?

Vinegar has a ph of 3, and household ammonia has a ph of 11. is the concentration of h+ greatest in the vinegar or ammonia?