Which of the following describes what happens in the second step of photosynthesis? a. electrons bond hydrogen atoms to oxygen molecules to form a carbohydrate molecule. b. electrons bond hydrogen atoms to carbon dioxide molecules to form a carbohydrate molecule. c. electrons bond hydrogen atoms to carbon monoxide atoms to form a carbohydrate molecule. d. electrons bond hydrogen atoms to carbon dioxide atoms to form a carbohydrate molecule.

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Fill in the blank with the correct sphere label. a: ⇒ geosphere b: ⇒ biosphere c: ⇒ hydrosphere

How do demetri's results show that digestive enzymes are crucial to maintaining homeostasis inside the body?