What is the effect of expressing a dominant active form of the small gtpase rac1 in a human neutrophil?

(a) the actin cytoskeleton of the neutrophil undergoes depolymerization.
(b) the neutrophil forms lamellipodial extensions.
(c) the neutrophil forms stress fibers.
(d) the neutrophil forms filopodia.
(e) the neutrophil forms focal adhesions to attach to the substratum.

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen