Which of the following components of the immune system form memory cells after you receive a vaccine?

skin and saliva

monocytes and macrophages

neutrophils and histamines

b and t cells

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

If the rna molecule in a human has the nucleotide sequence of guu, this would the amino acid valine would be needed to make the protein. how would this cha process was occurring in a mushroom?

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit