The 5' and 3' designations used in reference to DNA and RNA sequences are assigned to the
A. oxygen atoms contained in the deoxyribose and ribose.
B. hydrogen atoms that form hydrogen bonds between the nucleotides.
C. nitrogen atoms in the nitrogen bases.
D. carbon atoms in the nitrogen base purines and pyrimidines.
E. carbon atoms of deoxyribose and ribose.
E. carbon atoms of deoxyribose and ribose.
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Which of the following systems is the last of those listed below to begin development in the human
embryo? a. nervous system b. excretory system c. reproductive system d. skeletal system e. respiratory system
Which part of the Earth is warming the most quickly?
A) the Arctic B) the tropics C) the Northern Hemisphere D) All parts of the Earth are warming equally.
The deciduous forest of eastern North America has experienced dramatic changes over the past two to three centuries, transitioning from a nearly continuous forested area to increasingly patchy areas of forest broken up by farming and development
Some species are more sensitive to severe habitat fragmentation than others. What are some characteristics that might make a species more susceptible to the effects of habitat and population fragmentation?
Steroid hormones are lipid soluble and diffuse through the plasma membrane into a cell
Indicate whether the statement is true or false