Maternal blood mixes directly with the embryo’s blood in the placenta
a. True
b. False
ANSWER: False
Biology & Microbiology
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The first line of plant defense against pathogen infection is(are) the:
A. cuticle. B. plasmodesmata. C. stomata. D. pathogens. E. cell walls.
Biology & Microbiology
A biological response to changes in the length of darkness or light in a circadian rhythm is known as ________
a. thigmotropism b. photosynthesis c. photoperiodism d. phototropism
Biology & Microbiology
An infection of the thin layer of tissue around the inner cavities of the heart itself would affect the ________
A) pericardium B) endocardium C) myocardium D) sinoatrial node
Biology & Microbiology
Which of the following pairs is mismatched?
A) NaOH ? Na+ + OH- — base B) HF ? H+ + F- — acid C) MgSO4 ? Mg2+ + SO42- — salt D) KH2PO4 ? K+ + H2PO4- — acid E) H2SO4 ? 2H+ + SO42- — acid
Biology & Microbiology