() a sodium-potassium pump within a cell membrane requires energy to move sodium and potassium ions into or out of a cell. the movement of glucose into or out of a cell does not require energy. which statement best describes the movement of these materials across a cell membrane? 1points a sodium and potassium ions move by active transport, and glucose moves by osmosis. b sodium and potassium ions move by active transport, and glucose moves by facilitated diffusion. c sodium and potassium ions move by facilitated diffusion, and glucose moves by osmosis. d sodium and potassium ions move by facilitated diffusion, and glucose moves by active transport.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

If your blood becomes too concentrated with iona, what will happen to the red blood cells

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.