Sand is a type of mixture A mixture is a

heterogeneous mixture

sand is a Heterogeneous mixture. Heterogeneous mixture has two or more chemical substances.

A mixture is a material made up of two or more different chemical substance/substances which are not chemically combined!

Explanation:

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the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

flooding wildfire landslides climate change the factors listed have an immediate effect on the animal populations found in any habitat. the four factors would lead to a death. b emigration. eliminate c immigration. d mutations.