Which phrase describes the equator? check all that apply. more than one is a line of latitude it is situated at 0 degrees connects the north and south poles circles earth as an invisible line on a globe separates the eastern and western hemispheres

The correct options are:

The equator is an imaginary line around the middle of the Earth at a latitude of 0°. It is the great circle at an equal distance from the North Pole and the South Pole. Thus, the equator divides the Earth in into two equal symmetrical halves.  

is a line of latitude

it is situated at 0 degrees

circles Earth as an invisible line on a globe

The equator is an invisible imaginary line that lies between the middle of the earth. It lies at latitude of 0°C. It circles the earth in the middle and divides the earth into two surface hemispheres such as Northern and Southern hemisphere. The equator is equidistant from North Pole and South Pole.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."    

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.