The following is an example of what characteristic of life? As a tree ages, it becomes larger and more massive.

A. homeostasis
B. Response to external stimuli
C. Reproduction
D. Growth
E. Genetic code

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

Which three statements represent the benefits of performing experiments using computer simulations?

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.