Why are c4 plants able to photosynthesize with no apparent photorespiration? they conserve water more efficiently. they exclude oxygen from their tissues. they do not participate in the calvin cycle. they use pep carboxylase to initially fix co2?

Which of the following is an example of a tissue on the digestive system a.the stomach b.smooth muscle that lines the stomach c.nerve cells in the stomach d. enzyme molecules in the stomach

Lactic acid and energy are produced in muscle cells during choose 1 aerobic respiration cellular respiration anaerobic respiration cellular division

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures