White blood cells migrate to a source of infection by amoeboid migration along the surfaces of endothelial cells. Imagine you have discovered a toxin that suppresses the immune system by specifically inhibiting pseudopod formation in white blood cells. Which of the following is your toxin's most likely mechanism of action? O It interferes with the interaction between actin monomers. O It prevents hydrolysis of GTP. O It causes Ca++ to leak out of the smooth ER. O It prevents ATP hydrolysis.

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

Explain light independent reactions

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.