What is a nucleotide made up of

How does carbon enter and exit a consumer?

What is the name given to species like lichen which are the first to colonize bare rock? A) pioneer species B) climax community C) grasses D) settlers

Which statement best explains why the overall charge on an atom is zero? The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud.

A frequent cause of measurement error in polls is due to

BT corn is a genetically modified organism that contains a gene from bacteria that live in soil. This inserted gene allows the corn to kill the corn borer caterpillar because? A. It has RNA from the bacteria that will kill the pest. B.

What is the graphical representation of age structure known as? A. age group B. age graph C. age scale D. age pyramid

Anthony places a drop of water under a microscope and observed some small objects. He concludes that the small objects are cells. Which choice most likely describes the evidence that Anthony saw?

What is the bottom layer of skin? hypodermis epidermis dermis submit rewatch?

The division of cells following telophase is called?

How do matter and energy move differently through the biosphere