Biology, 18.01.2020 04:31 xxheartbreakerxx11
The specific defenses of the immune system include a variety of cells that circulate in the blood and that make up organs such as the spleen and thymus. how are the cells of the immune system able to differentiate pathogens from the cells of the body?
a. the cells of pathogens are much smaller than human body cells.
b. pathogens move through the body, while human body cells are stationary.
c. pathogens contain foreign molecules, or antigens, on their outer surface.
d. pathogens release foreign molecules, or antigens, when cells of the immune system approach them.
Answers: 1
Biology, 22.06.2019 10:00
Suppose you use three different scale to weigh a bag of oranges. one scale says the nag weighs 2.1 lb, and third says it weighs 2.1 lb. the actual weight of the bag of oranges is 2.153 lb. which of the following best decribes these results?
Answers: 2
Biology, 22.06.2019 11:00
Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?
Answers: 2
Biology, 22.06.2019 12:30
Gram-negative bacteria have a cell wall that is! and does not accept the stain, making itappear
Answers: 2
Biology, 22.06.2019 13:30
Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what
Answers: 1
The specific defenses of the immune system include a variety of cells that circulate in the blood an...
Spanish, 03.11.2020 14:10
Spanish, 03.11.2020 14:10
Computers and Technology, 03.11.2020 14:10
Mathematics, 03.11.2020 14:10
Biology, 03.11.2020 14:10
History, 03.11.2020 14:10
Mathematics, 03.11.2020 14:10
English, 03.11.2020 14:10
Social Studies, 03.11.2020 14:10
English, 03.11.2020 14:10
English, 03.11.2020 14:10
Mathematics, 03.11.2020 14:10
Mathematics, 03.11.2020 14:10
History, 03.11.2020 14:10