Provide several reasons why our estimates of species numbers are incomplete
What will be an ideal response?
One reason is that some areas of Earth remain mostly unexplored, such as the ocean depths, hydrothermal vents, and the tree canopies and soils of tropical forests. Another reason is that many species are tiny and easily overlooked; these inconspicuous organisms include species of bacteria, nematodes (roundworms), fungi, protists, and soil-dwelling arthropods. In addition, many organisms are so difficult to identify that a population thought to be a single species turns out to be two or more species on close investigation. The opposite could also be true, where two populations considered as separate species are, on close investigation, actually the same species.
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Only some of the heat radiated by the Earth escapes to space
Indicate whether the statement is true or false
The focal point of the earliest Russian culture was centered around Slavic principalities in the area of which two modern cities?
A. Moscow and St. Petersburg B. Vladivostok and Irkutsk C. Novgorod and Kiev D. Stalingrad and Leningrad
What is the tenacity of a mineral, and how can it be described?
a. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming, although the deformation always reverts to the original shape of the mineral. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. b. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as brittle, elastic, malleable, or sectile. c. Tenacity is the mineral's resistance to breaking, bending, or otherwise deforming. A mineral's tenacity can be described as tenacious, very tenacious, or not tenacious. d. Tenacity is the mineral's crystal's ability to stay attached to other crystals. It can be described as tenacious, very tenacious, or not tenacious. e. Tenacity describes how easily a mineral crystal can be separated from other crystals and is described as brittle, elastic, malleable, or sectile.
How do the properties of water help our oceans to remain in liquid form?