The human body uses many different kinds of minerals, but there six that are considered essential. Which group is made up of only essential minerals?

calcium, magnesium, and iodide
magnesium, chloride, and zinc
potassium, phosphorus, and iron
sodium, calcium, and magnesium

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Name the glands associated with human digestive system

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin