What is the most penetrating kind of radiation product that can be shielded with aluminum foil? alpha particles beta particles gamma rays high-energy photons

Why is specialization useful

Controls are defined as ___. A) variables scientists observe for changes B) things that change during an experiment C) variables that are changed by the scientist D) things that are kept constant during an experiment

If an active cell produces an important protein for secretion, what is the correct sequence of organelles that are involved in the production of the protein?

A scientist makes the argument that she has found DNA evidence that shows that evolution does not exist.

What is the main reason that viruses are not considered to be living organisms? A They are too small to be living. B They do not have DNA. C They need the host cell to replicate. D They kill the host cells.

Compare and contrast photosynthesis and cellular respiration. you must write at least 1 similarity and 1 difference

Which of the following is the longest distance from Earth? A. the distance to the nearest star beyond the Sun B. the distance to the edge of the Universe C. the distance to the next galaxy D. the distance to the edge of our solar system

Which activity would eventually result in a stable ecosystem?

What cell structure would a leaf or a tree have that a fingernail wouldn't A. mitochondria B. Cilia C. chloroplasts D. ribosomes

Which phrase defines a law? a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable A statement of fact that is generally accepted to be true and universal because it has always been