What is (are) the role(s) of complement proteins in the immune response?
I. They attract white blood cells to the site of infection.
II. They help other cells avoid infection.
III. They cause pathogens to clump together, making the pathogens easier to identify and destroy.
IV. They form a pore in the plasma membrane of a pathogen, causing it to rupture.
I only
II and IV only
II and III only
I and IV only
I, II, and IV only

Pathogens are recognized by a variety of immune cells, such as macrophages and dendritic cells, via pathogen-associated molecular patterns (PAMPs) on the pathogen surface, which interact with complementary pattern-recognition receptors (PRRs) on the immune cells' surfaces.

Explanation:

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

meiosis is the first to occur after the nuclei of opposite of opposite mating types fuse