Which of these is NOT an effect of exercise on veins?

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.

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?

Hydroelectric uses moving water to do work such as grinding grains in a mill true or false