Some scientists estimate that with the full use of plants' capabilities in feeding the world, the population could safely rise
to billion.
20
50
O
80
100

Which type of neuron stimulates muscles to contract?

Explain the difference between mutations in sex cell and those in somatic cells

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.