Cercariae, metacercaria, redia, and sporocysts are all life cycle stages of trematodes
Indicate whether the statement is true or false
TRUE
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Recognizing pathogens that contain multiple unique proteins which enable the human immune system to recognize just one and mount an effective response has opened the door on development of some vaccines only being
A) attenuated carrier viruses. B) monovalent. C) subunit vaccines. D) purified protein administered.
Self-recognition is based on T cell receptors recognizing:
a. MHC markers b. perforins c. complement d. naive B cells e. antibodies
In the section "Investigating Life: Birds Do, Bees Do It", when the researcher crossed M. lewisii and M. cardinalis, the hybrids had which genotype?
A. YUP/yup B. yup/yup C. YUP/YUP D. YUP E. yup
The early evolution of higher apes and early ancestors of modern humans most closely resembles
A. two streams, Australopithecus and Homo, that merge into one lineage leading to humans. B. a straight-line vine with one main trunk and many unsuccessful short branches, with only one or two forms coexisting at any one time. C. a many-branched tree with all modern forms extending back relatively unchanged until reaching the common "missing link" at an origin about 33 million years ago. D. two main trunks leading to apes or humans, and where each newly advanced species of Homo immediately eliminated any coexisting hominids. E. a complex bush with many branches and perhaps as many as ten species of hominins 2 million years ago.