An element's atomic number is 49. How many electrons would an atom of this element have?

Which expression best illustrates the idiosyncratic nature of stress? a. "beauty is in the eye of the beholder." b. "a penny saved is a penny earned." c. "an apple a day keeps the doctor away." d. "beauty is in the eye of the beholder."?

true or false / body systems constantly monitor internal and external conditions in the body, and respond to return the internal conditions to equilibrium

Write a series of paragraphs that shows your knowledge of the following: the biochemical structure of DNA, how DNA replicates, how the DNA structure forms the genetic code, and how that genetic code comes to be expressed as a phenotype.

Which observation proves that a cell is a eukaryote? A. The cell has a cell membrane. B. The cell contains a nucleus. C. The cell uses ribosomes to create protein. D. The cell contains DNA

Which of the following contains the lipid bilayer structure that allows for cells to be selectively permeable? a. ribosome b. nucleus c. cell membrane d. Endoplasmic reticulum

Any problem of inquiry can be proved or disproved using the scientific method. True False

What was the first living cells to evolve on earth?

Natural lakes are formed by erosion. ALL BUT one of these is a type of erosion that forms lakes. A) glaciers. B) gravity. C) rivers. D) wind.

If one mole each of CH4, NH3, H2S, and CO2 is added to 1 liter of water in a flask (1 liter of water = 55.

Fossil Fuels are considered nonrenewable resources because they ... a. burn so quickly b. are in such high demand c. take millions of years to form d. pollute the air