When plasmogamy occurs in two compatible mating types of fungi, a dikaryotic cell is formed in the hyphae. For some groups of fungi, only one or a few cells are dikaryotic
In other
groups of fungi, a majority of the cells that make up the fungal hyphae are dikaryotic. What
might be an advantage of having dikaryotic hyphae?
A. Dikaryotic hyphae have more nuclei and
there can be higher rates of transcription and
translation and more digestive enzymes
made by each cell.
B. Dikaryotic hyphae are able to divide more
rapidly than hyphae with only one nucleus.
C. Karyogamy can occur in more than one
cell and more fruiting bodes can be produced,
increasing the number of spores produced
through sexual recombination.
D. Karyogamy can occur more rapidly when a
dikaryotic hypha finds an alternate mating
type.
C
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Darwin's inference that individuals within a population compete for limited resources was based on which
observation(s)?
a. Most organisms produce more than one or two offspring. b. Populations do not increase in size indefinitely. c. Food and other resources are limited for most populations. d. Most organisms produce more than one or two offspring and populations do not increase in size indefinitely.
e. Most organisms produce more than one or two offspring, populations do not increase in size indefinitely, and food and other resources are limited for most populations.
A short base sequence near the poly-A tail of a mature mRNA functions to ________
a. encode a destination for the molecule and block translation before it is delivered b. aid binding of the mRNA by the small ribosomal subunit c. bind to complementary regions on microRNAs, signaling degradation of the message d. delay the degradation of the coding region by exonucleases
Which of the following is not a characteristic of the normal biota of the female reproductive tract during childbearing years?
A. Estrogen causes glycogen release. B. Candida albicans is present in small amounts. C. Lactobacilli convert sugars to acid. D. Secretory IgA provides protection. E. Vaginal pH is neutral.
Which of the following groups of organisms demonstrated a sudden appearance in the fossil record
and continues to exhibit remarkable diversity today? a. ferns and mosses b. fungi c. algae d. flowering plants e. pines