The growth rate of a population is expressed as:
a. b ? d.
b. i ? e.
c. K ? N.
d. dN / r.
e. (K ? N) / K.
A
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Which of the following cell junctions are associated with the proper alignment of intestinal epithelial cells?
A) gap junctions B) adhesive junctions C) tight junctions D) desmosomes E) all of the above
For most multicellular eukaryotes, including humans, mitochondria are inherited
a. only from the father. b. from both the father and the mother. c. from the mother for females and from the father for males. d. randomly from either the father or the mother. e. only from the mother.
Compared to uric acid, using urea as the main form of nitrogenous waste requires
a. more energy and water. b. less energy and water. c. more energy and less water. d. the same amount of energy and water. e. less energy and more water.
The following coat colors are known to be determined by alleles at one locus in horses:
palomino = golden coat with lighter mane and tail cremello = almost white chestnut = brown The following table gives ratios obtained in matings of the above varieties: Cross Parents Offspring 1 cremello x cremello all cremello 2 chestnut x chestnut all chestnut 3 cremello x chestnut all palomino 4 palomino x palomino 1/4 = chestnut 1/2 = palomino 1/4 cremello Assign gene symbols for the genetic control of coat color on the basis of these data. A) C1C1 = cremello, C2C2 = chestnut, C1C2 = palomino B) C1C1 = chestnut, C2C2 = palomino, C1C2 = cremello C) C1C1 = palomino, C2C2 = chestnut, C1C2 = cremello D) C1C1 = palomino, C2C2 = cremello, C1C2 = chestnut E) C1C1 = chestnut, C2C2 = cremello, C1C2 = palomino