A student put an elodea plant in a test tube for 24 hours. For 12 hours, the plant received light; for the next 12 hours, the plant was kept in the dark.
The student measured the pH in both conditions. Explain why the water
became acidic at highttime. (You may use the formula for photosynthesis:
6CO, + 6H 0 -- CH, 20. + 602.)

The body is protected against harmful flu viruses by

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.

Moving down the ramp from 6 meters to