The thing that distinguishes one element, such as chlorine, from another, such as neon, is the number of:
A) protons in the nucleus.
B) protons and neutrons in the nucleus.
C) electrons.
D) protons, neutrons, and electrons.
E) neutrons in the nucleus.
A) protons in the nucleus.
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The Na+/K+ pump creates a ____ charge inside the cell and a ____ charge outside the cell
a. negative; negative b. positive; negative c. positive; positive d. negative; positive e. neutral; positive
Peripheral proteins are linked to either surface of the plasma membrane by:
a. covalent disulfide bonds. b. associating with fatty acids through hydrophobic interactions. c. associating with glycoproteins on the inner membrane surface. d. bonding to integral proteins through noncovalent interactions. e. embedding in one side of the membrane and, thus, not extending through to the other side.
Explain how the hypotheses of island biogeography can be used to understand problems in conservation biology
What will be an ideal response?
Plant species regularly hybridize in nature, but only some crosses result in new polyploid species. Of the crosses below, if each one occurred, which would be most likely to result in a new stable polyploid species?
A. A cross between a species with a CC genome and a species with a DD genome, forming a hybrid with a CD genome. B. A cross between a species with a BB genome and a species with a DD genome, followed by a doubling of chromosomes, forming a hybrid with a BBDD genome. C. A cross between a 4n gamete and a 1n gamete, forming a 5n hybrid. D. A cross between a 2n gamete and a 1n gamete, forming a 3n hybrid.