Which of the following is an adult organism that has fewer than 1,000 cells?
A) chickens, Gallus domesticus
B) African clawed frogs, Xenopus laevis
C) fruit flies, Drosophila melanogaster
D) nematodes, Caenorhabditis elegans
D
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An evil genius wants to stop all vascular plants from photosynthesizing. He decides to send his minions out to cut off the structures in plants where most photosynthesis takes place. Which structures should his minions remove?
A. roots B. flowers C. leaves D. stems
When scientists were attempting to determine the structure of the genetic code, Crick and coworkers found that when three base additions or three base deletions occurred in a single gene, the wild-type phenotype was sometimes restored
These data supported the hypothesis that ________. A) the code is triplet B) AUG is the initiating triplet C) the code contains internal punctuation D) there are three amino acids per base E) the code is overlapping
In the formation of biofilms, such as those forming on unbrushed teeth, cell signaling serves which function?
A) formation of mating complexes B) aggregation of bacteria that can cause cavities C) secretion of substances that inhibit foreign bacteria D) digestion of unwanted parasite populations
The ________ is used to convert the linear sequences of bases in DNA to the sequence of amino acids in proteins
Fill in the blank(s) with correct word