Mature cardiac cells remain metabolically active but do not proliferate. this type of arrest is known as the

Mature cardiac cells remain metabolically active but do not proliferate. this type of arrest is known as the G o phase.

The stages of a cell cycle is divided into four phases namely the G1 phase, S phase (synthesis), G2 phase (interphase) and M phase (mitosis or meiosis). But the cells that have stopped dividing are said to have entered a phase of quiescence called the G o phase.

G o phase refers to a non-dividing cellular phase outside the replicative cell cycle. The cells in this stage remain metabolically active but do not divide and increase in their number. G o phase irreversible in the differentiated cells of bone, cardiac muscle and nerve. The cardiomyocytes or the heart muscle cells simply increase in size as the heart goes larger.

Thus, the mature or differentiated cardiac cells remain metabolically active but do not divide and get arrested in the G o phase of cell division.

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the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.  

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?