The "true wrist" or carpus consists of . Select one: a. the phalanges b. the styloid processes of the radius and ulna c. the metacarpals d. a group of eight short bones united by ligaments

The "true wrist" or carpus consists of  D. A group of eight short bones united by ligaments.

Explanation:

The carpus bones are a group of eight bones that connect the hand to the forearm. The name carpus means wrist. Its main function is to help positioning the hand and with the mobility of all this bones, we are allow to do better movements. This eight bones are the following:  

- Distal Row: Trapezium, Trapezoid, Capitate, Hamate

- Proximal row : Scaphoid, Lunate, Triquetrum, Pisiform

the correct option is d

Explanation:

At the base of the hand, that is, at the wrist or the carpus, there are 8 bones distributed in two rows. The bones that are closest to the arm are the ones that connect to the radius and the ulna and are called the trapezius, trapezoid, large and hooky, these are the bones of the distal row

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.