Isotopes that are unstable and decay when their nucleus breaks up into elements with lower atomic numbers, emitting significant amounts of energy in the process, are called:

A. energetic
B. ionic
C. radioactive
D. isometric


C. radioactive

Biology & Microbiology

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Lymph moves throughout the lymph vessels due to ____

a. contraction of the heart b. conscious actions c. constriction of blood vessels d. dilation of blood vessels e. skeletal muscle and breathing movements

Biology & Microbiology

The most recent international project to assess the diversity, distribution, and abundance of marine life was called which of the following?

What will be an ideal response?

Biology & Microbiology

Which step in the evolution of life is the most

complex and probably occurred last? a. formation of DNA b. formation of protein-RNA systems c. formation of membrane-bound proto-cells d. spontaneous formation of organic compounds under abiotic conditions e. formation of ATP

Biology & Microbiology

The region of the small intestine with the lowest pH is the ________

Fill in the blank(s) with correct word

Biology & Microbiology