The septum in a fungus is
A. the seventh nucleus in a dikaryote cell.
B. the seventh cell from the tip of the hypha.
C. a cross wall that separates hyphae into cells.
D. the seventh cellular division.
E. the demarcation between the mycelium and the fruiting body.
Answer: C
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A rare recessive trait in a pedigree is indicated by which pattern of inheritance?
A) vertical B) horizontal C) diagonal D) both vertical and horizontal E) pure-breeding
Secondary protein structure is dependent on
a. hydrophobic interactions. b. hydrogen bonds between two amino acids. c. covalent linkages between carbons and nitrogens of adjacent amino acids. d. covalent linkages between carbons and oxygens of adjacent amino acids. e. all of these.
When two frog species, Rana pippins and Rana sylvatica, mate, the offspring die early in embryonic development. This is an example of ___________.
A. Hybrid sterility B. Reduced hybrid fertility C. Mechanical isolation D. Reduced hybrid viability
Genes at one locus that affect the expression of genes at a different locus are said to be
A. epistatic. B. linked. C. codominant. D. continuous. E. alleles.