The classification system includes the domain Archaea. What characteristic would NOT be found in an organism in this domain?
A) a cell membrane
B) a set of genetic instructions
C) a nucleus
D) a cell wall
Ans: C) a nucleus
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A man and woman are each heterozygous for the autosomal recessive disorder cystic fibrosis. If they
want to have three children, what is the probability that only one of the children will have cystic fibrosis?
a. 1/4 b. 3/4 c. 9/16 d. 9/64 e. 27/64
What is the key difference between protostomes and deuterostomes?
a. Protostomes are animals with soft exteriors and deuterostomes are animals with hard exteriors (i.e., shells). b. Protostomes represent a lineage of bilaterally symmetrical animals, whereas deuterostomes represent a lineage of radially symmetrical animals. c. The protostome gut develops from back to front and the second opening becomes the mouth. The deuterostome gut develops from front to back, so the first opening is the mouth. d. The protostome gut develops from front to back, so the first opening is the mouth. The deuterostome gut develops back to front and the second opening becomes the mouth. e. Protostomes represent animals that are prokaryotes, and deuterostomes represent all over animals.
What is the definition of the term gene?
What will be an ideal response?
All of the following are the results of complement activation, except
A. opsonization which enhances phagocytosis. B. lysis of bacterial cells. C. enhanced inflammation. D. increased antibody production.