Which of the following is a catalytic protein that speeds up biochemical reactions? O endoplasmic reticulum
O enzyme
O organ
O organelle

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

Which greenhouse gas is emitted when burn fossil fuels for energy? a. nitrogen b. oxygen c. carbon dioxide d. helium

Animals have a variety of adaptations, including trachea and gills, which allow this key process to occur. which provides the molecules necessary for cellular respiration and efficient atp synthesis?