Ga country with a larger percentage of young people will have a higher population growth rate than a country with a larger percentage of old people even if both countries have the exact same mortality and fertility rates. explain and illustrate this using age pyramids (find pyramids from actual countries) for a young country and an old country.

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions

Where is muscle tissue found in the body?

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.