The Vibrio cholerae has a holotoxin formed of two sub units A-B, in which 'B' part adheres to the target cell while 'A' part forms the biological function.
a. true
b. false
Ans: a. true
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Limiting factors
a. produce more pronounced effects as a population grows. b. prevent a population from producing a Jshaped curve. c. can be either density-dependent or densityindependent. d. act together in concert to form the environmental resistance to population growth. e. have all of these characteristics
The cell shown here is most likely _____
1.finished with metaphase and transitioning to anaphase
2.preparing to duplicate its chromosomes
3.getting ready to align its chromosomes between the spindle poles in metaphase
4.preparing to decondense its chromosomes at the spindle poles
In this graph of yellow-eyed penguins, the data indicate that
A. 10% of the yellow-eyed penguins live to eleven years of age.
B. reproductive age of the yellow-eyed penguins is three years.
C. most of the yellow-eyed penguins die in their first year of life.
D. All of the answer choices are correct.
E. just less than 30% of the yellow-eyed penguins survive to reproductive age.
The specific function of a protein is determined by the
A) number of peptide bonds it contains. B) exact sequence of amino acids. C) fatty acids that are joined together in the polypeptide. D) number of disulfide bonds. E) hydrophilic head attached to the hydrophobic tail.