Based on the image below, what is the most abundant element found in Earth's crust?
Abundance of Elements in the Earth's Crust
Aluminum
Iron
Silicon
Calcium
Sodium
Magnesium
All Other Elements
Oxygen

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Which is a function performed by stem cells in the skin a. replacing lost skin cells b. making cells for the intestines c. growing new organs d. differentiating into brain cells plz apex