Which two generalizations can be made based on what you know about cycles of matter in a closed system? New matter is added, and old matter is destroyed. Matter changes its physical form, allowing it to return to its original state. The amount of matter within the system remains the same. Matter and energy can cross the boundaries of the system. The cycle has a well-defined starting and stopping point.

Choose a mutation from those in model 2 that would be neutral for a cell. explain your reasoning by relating the mutation to the cellular respiration process.

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.

How many copies of genes do gametes have?