Asexual reproduction in ascomycetes takes place by means of
A. ascogonia.
B. zygospores.
C. motile gametes.
D. conidia.
E. ascospores.
Answer: D
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Use the following information to answer the following question(s): You wake up one morning feeling slightly under the weather. A close family member enthusiastically suggests that you take some Echinacea, an herb commonly used as a cold remedy. You then decide to design an experiment to test Echinacea and see if this claim is true. You think, "If taken at the beginning of a cold, Echinacea will reduce cold symptoms."If you give 100 sick people tablets similar to Echinacea but with no herb (called a placebo), and do not tell them whether they are receiving the placebo or the Echinacea tablet, what kind of control would this be?
A. A positive control, since you are expecting a change to happen in this control group B. A blind control, since the sick people do not know whether they are receiving the placebo or the Echinacea C. A negative control, since you are expecting no change to happen in this control group D. Both B and C are correct
Future kidney cells and heart cells can differentiate into their respective specialized cell types because
A. they express a different set of genes during development B. they possess different genes C. they arise from different embryonic stem cells D. they utilize different transcription factors E. they express different genes and utilize different transcription factors during development
Which of the following best describes night-neutral plants?
A) The plants flower at night. B) Plants tend to flower when nights become longer. C) Plants tend to flower when nights become shorter. D) The flowering in these plants is not affected by photoperiod.
Natural penicillins and cephalosporins are made by members of Domain _______.
A. Bacteria B. Archaea C. Eukarya