Which one of the following is a kingdom?
A) Eukarya
B) Primates
C) Archaea
D) Animalia
E) Bacteria
D
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Which of the following is INCORRECT about ribosome biosynthesis and structure?
A. Ribosomes are composed of two subunits. B. Ribosomes are composed of RNA. C. All components of the ribosome are produced in the cytosol. D. Ribosomal proteins are produced in the cytosol. E. Ribosomes are composed of proteins.
Which of the following is an example of therapeutic cloning?
a. Splitting an embryo into two halves to produce two embryos within a laboratory b. Using cells from a cloned human embryo for medical purposes c. Asexual cloning in bacteria d. Transferring DNA of an adult donor's body cell into an unfertilized egg e. Splitting of an embryo within the uterus, producing identical twins
Which extraembryonic tissue burrows into, and thus attaches to, maternal tissues?
a. the amnion b. the yolk sac c. the chorion d. the blastocyst protein coat e. the inner cell mass
The standard classification system used by biologists today groups and classifies organisms on the basis of similar physical traits. This system was first developed by Carl Linnaeus
At the time of his work, there were other methods for grouping organisms that were based on similar habitats, similar diets, or similar behaviors. Why is the Linnaen system still useful to biologists today? A) This system is the simplest; the others are too complicated. B) This system classifies based on shared traits and infers evolutionary relationships. C) This system included all organisms found on Earth. D) This system relies on Latin names that make the most sense to biologists.