The manufacture(s) most blood cells.
a. spleen
b. lymph nodes
c. bone marrow
d. liver

Assume that a student is given two different models of bacteria, with one model consisting of big bacteria and the other consisting of small bacteria. how can the student demonstate the theory of endosymbiosis using the models

Which type of bacterial reproduction is depicted in the diagram?

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra