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25) Isotopes of an element have the same ________, but different ________. A) number of electron shells, numbers of protons B) atomic number, atomic masses C) number of neutrons, numbers of protons D) atomic mass, atomic numbers

4) Which one of the following is a TRUE statement? A ) Molecules are considered to be the smallest unit capable of exhibiting all the characteristics of life. B) Cells arise spontaneously from nonliving chemical elements. C) All living things are made up of at least one cell. D) Cells are incapable of maintaining homeostasis because they are too small.

Semipermeable membranes:

Circumduction is:

24) The total number of protons and neutrons in an atom can best be determined by A) atomic mass B) the subscript number following the chemical symbol C) atomic number D) the charge of the atom

The area on an enzyme where the reaction occurs is known as the ______________________.

The term _____________ means “boat shape”:  

13) Which one of the following best describes the evolutionary advantage of bipedalism? A) allows an organism to have precise control over the action of the thumb and fingers B) frees the hands for carrying objects C) results in improved eye-hand coordination D) in early humans, allowed for complex motions associated with the use of tools

Movement of large amounts of material into the cell using ATP:  

This muscle type lacks troponin & tropomyosin: