When Mendel crossed two plants that were heterozygous for a single trait, what was the phenotypic ratio of their offspring?
A. 1:2:1
B. 9:3:3:1
C. 3:1
D. 7:4
E. Varied depending on the trait
C
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Mycorrhizae
A. are vital for the survival of lichens. B. are vital for the survival of many plants. C. increase the absorptive ability of roots. D. are used in the production of wine, beer, and bread. E. are vital for the survival of many plants AND increase the absorptive ability of roots.
What are Koch’s postulates?
a. A set of rules on how to treat a disease b. A set of theories that explains how a bacteria can cause a disease c. A set of rules that provide a classification system of disease-causing bacteria d. A set of guidelines to follow in order to isolate a particular bacteria from an infected organism
e. A set of guidelines to demonstrate that a specific pathogen causes specific disease symptomsExplain the reciprocal nature of the net chemical reactions for photosynthesis and respiration.
What will be an ideal response?
Which action best illustrates in situ conservation?
a. breeding captive species in zoos b. collecting eggs from nature c. participating in artificial insemination d. breeding captive species and collecting eggs from nature e. designating a large area as a national reserve