Linnaeus classified organisms based on
1.DNA sequences.
2.protein sequences.
3.morphological characteristics.
4.evolutionary history.
5.existing phylogenetic trees.
3
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A new serotype of Vibrio cholerae, V. cholerae 0139, has picked up the ability to produce
A. pili. B. flagella. C. capsules. D. toxin.
Which feature do bryophytes and flowering plants have in common?
1.flagellated sperm that must swim through water to reach eggs 2.a complex vascular system 3.both asexual and sexual reproduction 4.some cells contain lignin as a strengthener
citric acid cycle is equivalent to what terms
What will be an ideal response?
Superantigens
a. activate more T cells than normal. b. activate more B cells than normal. c. bind to MHC molecules outside of the normal antigen binding site. d. do all of the above. e. are characterized by a and c.