How does the nicotine from cigarette smoking disrupt oxygen distribution to the cells?
> it restricts air flow through the bronchi.
> it reduces the surface area of alveolar sacs.
> it binds to hemoglobin in red blood cells.
> it affects the nerve signals that regulate breathing.

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give