Some beetles and flies have antler-like structures on their heads, much like male deer do. the existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of a synapomorphy parsimony homology convergent evolution

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.