Biology, 15.12.2020 01:00 mayaduke9482
The arrows in the diagram show continuous, cyclic movements from one subsystem to another without an end. Reflect upon your previous answers and knowledge of Earth’s subsystems to determine whether the arrows in the diagram best represent matter, energy, or both. Explain your answer and provide at least one example that occurred during the Precambrian era. You have to write out an explanation.
Answers: 1
Biology, 21.06.2019 20:40
Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling
Answers: 3
Biology, 21.06.2019 21:00
The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?
Answers: 2
Biology, 22.06.2019 02:30
What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.
Answers: 1
Biology, 22.06.2019 05:50
Which of the following is not a possible effectof increasimg carbon dioxide levels in the atmosphere ?
Answers: 1
The arrows in the diagram show continuous, cyclic movements from one subsystem to another without an...
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