The most rapid differentiation in an embryo occurs during the first 2 months of pregnancy
Indicate whether the statement is true or false
TRUE
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Answer the question using the accompanying figure. The atom depicted in this figure can form ____ covalent bonds
with another atom.
a. 0 b. 2 c. 4 d. 3 e. 6
Match the terms appropriately
a. nitrogen-containing base, sugar, phosphate group(s) b. copy of an organism c. chromosome that does not determine sex d. DNA wrapped around histones e. fills in gaps, seals breaks in a DNA strand f. two chromosomes copies of each g. adds nucleotides to a growing DNA strand________ nucleosome________ clone________ nucleotide________ diploid________ DNA ligase________ DNA polymerase________ autosome
If the gene for telomerase is turned off in a cell, this is an indication it is a cancer cell.
Answer the following statement true (T) or false (F)
Evolution by natural selection is
A) a process that has occurred only in the past. B) currently occurring but only in scientific laboratories. C) constantly occurring at the same rate in all organisms. D) a rare event that has never been observed by scientists. E) a process that occurs as a result of differences in fitness.