I'm bored who want to talk as friend

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?