Question

a scientist wanted to investigate how changes in
the frogs can tolerate a ph between 4.5 and 6.
the frogs can tolerate any ph less than 4.
the frogs can tolerate any ph greater than 6.
the frogs can tolerate a ph between 3.5 and 5.
the effect of ph on frog embryo hatching

ph exposure	embryos exposed (n)	embryos hatched (n)	percentage hatched
ph 6	30	11	36.7
ph 5.5	30	16	53.3
ph 5	30	20	66.7
ph 4.5	30	27	90
ph 4	30	0	0
ph 3.5	30	0	0

Explanation:

Looking at the table, at pH 6.5 no embryos hatched, at pH 6 some hatched, at pH 5.5 - 4.5 the percentage hatched increased, and at pH 4 and 3.5 no embryos hatched. This indicates that the frogs can tolerate a pH between 4.5 and 6 as there is successful hatching within this range and no hatching outside it.

Answer:

The frogs can tolerate a pH between 4.5 and 6.