Select the correct answer.
larry is taking a walk in the park. the pollen in the air makes him sneeze constantly. what line of defense is his immune system exhibiting?
a.
first line of defense
b.
second line of defense
c.
third line of defense
d.
fourth line of defense

Your an average, moderately active adult female . therefore , you should consume approximately calories and 60 grams of fat.

Which of the following does not cause blindness? a. cataractsb. glaucomac. osteoarthritisd. diabetes

Which of the following represents a difference between viruses and viroids? a) viruses infect many types of cells, whereas viroids infect only prokaryotic cells.b) viruses have capsids composed of protein, whereas viroids have no capsids.c) viruses have genomes composed of rna, whereas viroids have genomes composed of dna.d) viruses cannot pass through plasmodesmata, whereas viroids can.