Population growth is at the root of many serious environmental problems. from the ancient babylonians thousands of years ago, to thomas malthus two centuries ago, to present day neo- malthusians, humans seem to possess an awareness of earth's limitations in the face of growing populations. today, our ability to accurately quantify, monitor, and control population growth is very sophisticated. we can measure growth and make predictions about world growth with mathematical and computer models. can we prevent disaster?

despite dire predictions in the past, humans still inhabit earth. a few economists would argue that this is because
-malthus's measurements were inaccurate
-malthus overestimated the earth's environmental sensitivity
-technological developments have alleviated some of the strain on earth's resources
-space exploration has revealed new frontiers
-world population growth has been slower than expected

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.