Some algae demonstrate the phenomenon of alternation of generations, in which a multicellular, diploid, spore-producing organism gives rise to a multicellular, haploid, gamete-producing organism. which of the following statements about alternation of generations is false?

a. the haploid and diploid organisms may or may not differ morphologically.
b. the haploid and diploid organisms differ genetically.
c. only the haploid organism may also reproduce asexually.
d. haploid gametes can produce new organisms only by fusing with other gametes.
e. diploid sporophytes may undergo meiosis to produce haploid spores.

Which of the following diseases may be transmitted through an accidental needle stick? a. syphilis b. tuberculosis c. cellulitis d. hepatitis b

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.

Which could be a pathway of food through an ecosystem