A covalent bond forms when
A. electrons are present in a valence shell.
B. a valence electron is removed from one atom and added to another.
C. a pair of valence electrons is shared between two atoms.
D. one atom attracts electrons more strongly than another atom.
Ans: C. a pair of valence electrons is shared between two atoms.
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One advantage that angiosperms have is a unique triploid ____, a nutritive tissue produced during
fertilization.
a. seed coat b. endosperm c. ovule d. pollen sac e. ovary
Which of the following solutions has the
potential to diffuse the fastest?
a. one with large molecules as opposed to smaller ones b. one with a higher concentration of molecules as opposed to one with a lesser concentration c. one under low pressure as opposed to one under high pressure d. one at a low temperature as opposed to one at a higher temperature e. all of these have the potential to diffuse equally fast
Which cells are least likely to proceed into G1?
a. most skin cells b. most liver cells c. most intestinal cells d. most red blood cells e. most nerve cells
Barbara McClintock identified corn mutants with the unstable mutant phenotype with what pattern of color?
What will be an ideal response?