An antigen has invaded a mammal's body. Specific immune cells engulf and ingest it. Some of the digested pieces are displayed on the cells' bodies. What happens next?

Iwill give brainiest to first person who gets it ! what are 3 basic types of interactions we see in an ecosystem?

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.