Which term describes an additional layer of skin that forms a sheath like covering over the glans of a penis?
A. urethra
B. fourchette
C. scrotum
D. foreskin
D. foreskin
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Which of the following were key events in the evolution of vascular plant leaves? Select all correct choices
A. the conversion of stems (or branches) to flattened structures B. the development of apical meristem identity genes C. the development of leaf meristematic cells D. the development of leaf identity genes
Transnational corporations
A) were not initially based in Japan and South Korea. B) first appeared in the middle of the twentieth century. C) are, by definition, not conglomerate corporations. D) have declined in number over the last three decades. E) first appeared in the early nineteenth century.
What is the primary difference between NAD+ and NADP+ (shown in the figure above)?
a. NAD+ functions as an electron transporter, whereas NADP+ does not. b. NAD+ functions as an electron transporter in chloroplasts while NADP+ functions as an electron transporter in mitochondria. c. Both function as electron carriers, but NADP+ has a third phosphate group and NAD+ does not. d. Both transport electrons to the electron transport chain (ETC) found on the inner mitochondrial membrane, but NADP+ transfers its electrons to the ETC at a higher energy level. e. NAD+ functions as a free energy source for cells while NADP+ does not.
Eutrophication is associated with all of the following
characteristics of a lake EXCEPT a. decrease in depth. b. limited transparency. c. abundant oxygen at all levels. d. increased abundance of anaerobic decomposers. e. abundant phytoplankton.