Answer:
During a chemical change, the composition of matter always changes. Four possible clues to chemical change include a transfer of energy, a change in color, the production of a gas, or the formation of a precipitate.
Explanation:
Answer:
Gap junctions within the intercalated disks
Explanation: Gap junctions within the intercalated disks allow impulses to be propagated from one cardiac muscle cell to another. It allows sodium, potassium, and calcium ions to flow between adjacent cells, propagating the action potential, and ensuring coordinated contractions.
Answer:
A lot of carbon passes through the atmosphere and into the biosphere through the plants consuming it, or in other words, photosynthesis, and the plants waste is oxygen, which animals breathe and turn into carbon dioxide
TL;DR Plants enter carbon into the biosphere and animals release it into the atmosphere
Answer:
gymnosperms produce male cones and female cones, and the pollen from a male cone fertilize the egg inside a female cone
