In the ABO blood type system the alleles IA, IB, and i produce

A. two phenotypes.
B. three phenotypes.
C. four phenotypes.
D. type A and type B blood types only.
E. one phenotype.


C. four phenotypes.

Biology & Microbiology

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Lateral gene transfer means that phylogenetic analyses of different individual genes from the same set of organisms often yield results that are inconsistent with each other

What technique seems to avoid this problem and give us the clearest, most consistent view of the "tree of life"? A) the polymerase chain reaction (PCR) B) molecular clock analyses C) "shotgun" rRNA sequencing from environmental samples D) Bayesian phylogenetic reconstruction E) whole-genome phylogenetic analysis

Biology & Microbiology

Water moves from regions of high water potential to regions of low water potential

Indicate whether the statement is true or false

Biology & Microbiology

Effector molecules

A) are associated with the induction of enzyme synthesis. B) are associated with the repression of enzyme synthesis. C) induce conformational changes. D) are often small organic molecules. E) All of these are true.

Biology & Microbiology

Refer to the accompanying figure. Which best describes what is happening to the red blood cells in Figure A?

a. Pinocytosis has occurred. b. Plasmolysis has occurred. c. There has been no net water movement. d. There has been a net flow of water out of the cell. e. There has been a net flow of water into the cell.

Biology & Microbiology