Special organs that store leukocytes are the thymus and spleen thymus and hypothalamus spleen and liver pancreas and pituitary

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.