Step 1: bacteria through nitrogen fixation and nitrification convert nitrogen into a usable form

Humans often think of themselves as unique, but in reality there are only a few distinguishing features. Which of these is unique to humans as compared to other mammals? a. Eccrine glands for thermoregulation b. Red blood cells that lack nuclei c.

If enough changes occur in the gene pool of a specles, it is possible that a new species would be created.

Function is to allow certain materials to move in and out of the cell

The nurse is providing education for a patient newly diagnosed with diabetes. the patient is discussing healthy sources of carbohydrates. what sources should be included? select all that apply.

Planets store carbohydrates as what

What is the difference between a meteor and a meteorite? A meteor has more mass A meteorite reaches Earth and has not burned up A meteorite orbits the sun and a meteor does not A meteorite glows

Which of these was NOT characteristic of the first cells on Earth? A) anaerobic B) prokaryotic C) single-celled D) contained organelles

Which process occurs only in autotrophic organisms?

Nylon fiber is classified under which one of these headings? A. Protein B. Polyurethane C. Polyester D. Polyamide

What factors influence the growth of organisms and their ability to reproduce?