Which of the following statements is true?

97% of the earth's water is fresh water.
30.1% of the earth's water is salt water.
97% of the earth's water is salt water.
0.3% of the earth's water is fresh water.

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity