Answer the following statements true (T) or false (F)
1. The nervous system of a cnidarian consists of a central ganglion leading into a nerve net.
2. The two body forms of some Radiata is an example of alternation of generations.
3. A medusa and polyp have similar body plans.
4. All Platyhelminthes are parasitic.
5. The disease schistosomiasis is caused by a parasitic trematode.
1. FALSE
2. FALSE
3. TRUE
4. FALSE
5. TRUE
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A patient complaining of watery, itchy eyes and sneezing after being given a flower bouquet as a birthday gift should first be treated with _____
A) a vaccine B) complement C) sterile pollen D) antihistamines E) monoclonal antibodies
What key words does the question contain and what do they mean?
What will be an ideal response?
Neutral theory proposes that _____
A) molecular clocks are more reliable when the surrounding pH is close to 7.0 B) most mutations of highly conserved DNA sequences should have no functional effect C) DNA is less susceptible to mutation when it codes for amino acid sequences whose side groups (or R-groups) have a neutral pH D) a significant proportion of mutations are not acted upon by natural selection
If the codon AAA is changed to AAG, it still codes for the amino acid lysine; this is an example of a
A) silent mutation. B) nonsense mutation. C) frameshift mutation. D) dimer formation. E) missense mutation.