Antitoxins: a. contain modified bacterial exotoxin molecules. b. are always genetically engineered. c. contain select antigenic components of a pathogen rather than whole cells or viruses. d. confer passive immunity. e. utilize dna strands that will produce the antigen.

The correct option is d. confer passive immunity.

Explanation:

An antitoxin is an antibody formed in an organism in response to the presence of a bacterial toxin inside, which it can neutralize. We speak of passive immunity, when it is obtained by the passage of antibodies (antitoxins) to the individual in a natural or artificial way, having as main feature that it is short-lived, since they remains only until the transferred antibodies or lymphocytes disappear.

which are post-impressionist paintings? check all that apply?

explanation:

post-impressionism is a predominantly french art movement that developed roughly between 1886 and 1905, from the last impressionist exhibition to the birth of fauvism. post-impressionism emerged as a reaction against impressionists' concern for the naturalistic depiction of light and color.

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the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.