The cell spends 90% of its time in what phase of the cell cycle?

According to the law of conservation of energy, energy can neither be created nor destroyed. if this is true, why is there less energy in the top of the energy pyramid than there is in the bottom of the energy pyramid?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.