The two strands of a dna molecule are said to be antiparallel. what does this mean?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

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.