Invertebrate chordates include __________ and
__________, both marine filter-feeders. Fill in the blank(s) with the appropriate word(s).
Answer: tunicates; lancelets
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Consider the accompanying figure. Four of the following are true statements about the structure indicated by “D.”
Which statement is false? a. It first evolved in arthropods. b. It extends anteriorly into the head region. c. It provides support for muscle contraction. d. It is replaced in most adult vertebrates by the vertebral column. e. It is one of the four exclusive features of chordates.
Q fever is apt to occur in epidemic form among ________.
A. slaughterhouse workers B. farmers C. veterinarians D. All of the choices are correct.
For this problem, you may want to create a
Punnett Square on a separate piece of paper. Manuel has both cystic fibrosis, a recessive disorder, and sickle cell anemia which is also a recessive disorder. Manuel’s partner, Lucretia, is normal for both conditions. What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?
a. 0% b. 25% c. 75% d. 100% e. it is not possible to solve this problem with the information provided
In order to add the gene for human insulin to a bacterial plasmid, the DNA molecules have to be "cut" with enzymes called restriction endonucleases and then pasted back together with enzymes called DNA ligases. Imagine that during this process, the first
five nucleotides of the human insulin gene were accidentally cut out before it was pasted into the bacterial plasmid. What is the most likely outcome if this plasmid was added to bacterial cells? A) The human insulin protein would not be produced because transcription would not take place since the RNA polymerase would not recognize the promoter. B) The human insulin protein would be produced as normal. C) The human insulin protein would not be produced because the start codon is missing. D) The human insulin protein would be shorter than normal because it will be missing one amino acid.