Why are fungi classified in the supergroup Opisthokonta, which includes animals and heterotrophic protists?
What will be an ideal response?
Answers may vary. DNA sequencing suggests that fungi, animals, and their protist relatives form a clade. All evolved from a common ancestor, which was most likely a unicellular, flagellated protist. Although most fungi have lost flagellated cells, chytrids and animals have retained this shared ancestral characteristic, as have their related protistan relatives.
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The function of tmRNA in bacteria is to:
A. rescue stalled ribosomes. B. terminate translation at all stopcodons. C. initiate translation at special start codons.
Substitution of one base pair for another in a coding region of a gene can result in a ____ mutation
where the changed codon codes for a different amino acid than was previously coded for.
a. missense b. chromosomal c. frameshift d. silent e. nonsense
Which muscle type is found in the walls of body tubes and cavities of vertebrates, such as blood
vessels and the intestines?
a. cardiac b. smooth c. skeletal d. rough e. epithelial
The unique double shells of diatoms are made of
A. silica. B. chlorophylls. C. proteins. D. cellulose. E. agar.