Which of the following is a characteristic of uracil?
a. It has the ability to bond with adenine.
b. It has the ability to bond with guanine.
c. It is a purine.
d. It has the ability to bond with cytosine.
e. It contains two nitrogenous rings.
c
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Arbuscules are structures associated with which fungal phylum?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Which statement regarding fungal reproduction is true?
A) Fungi do not produce spores. B) Many fungi can reproduce either sexually or asexually. C) Fungi can only reproduce sexually. D) Fungi alternate between sexual and asexual reproductive generations.
Fortunately, even in cases where we suffer from an omitted variable bias, it is often the case that with careful reasoning it is possible to:
A. construct alternative p-values. B. report appropriately adjusted standard errors. C. make the size of bias not statistically significant from zero. D. sign the bias.
Which of the following statements is true regarding Drosophila?
A) The ratio of autosomes to fly Y and X chromosomes determines fly sex. B) The Y chromosome plays no role on fly sex determination but does contain genes for fly reproduction. C) The Y chromosome determines male flies. D) The Y chromosome plays no role in fly sex determination or fly reproduction. E) The ratio of X to Y chromosomes determines fly sex.