Photosynthesis must provide a source of electrons and H+ because ____
a. atmospheric CO2 must be oxidized by adding electrons
b. CO2 must be reduced to produce sugars
c. hydrogen atoms are added to oxygen to form water
d. hydrogen ions and electrons react to produce hydrogen gas
e. hydrogen ions and electrons are converted into oxygen gas
ANSWER: b
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Blood is a type of connective tissue because blood _____
A) has multiple cell types B) has an extensive extracellular matrix C) functions in transportation D) can be both liquid and solid
In legumes, it has been shown that thigmotropism is correlated with _____
A) abscisic acid (ABA)-stimulated closing of guard cells caused by loss of K+ B) rhythmic opening and closing of K+ channels in motor cell membranes C) senescence (the aging process in plants) D) flowering and fruit development
After mutagenesis and screening, you have found a mutant that is able to grow in soil with high salt content. Chemical analysis showed that this plant has a decreased amount of Na+ relative to normal plants
What kind of mutation do you predict this plant contains? A) mutation in the plasma membrane sodium channel B) mutation in the metallothioneins C) mutation in the tonoplast sodium channel D) mutation in the tonoplast antiporter
Which combination of nonfermenting gram-negative bacilli are oxidase positive, but do not grow on MacConkey agar within 24 to 48 hours
a. B. cepacia and Pseudomonas stutzeri b. Brevundimonas dimunuta and Pseudo-monas veronii c. P. aeruginosa and R. insidiosa d. B. vesicularis and Acidovorax facilis