Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

A. Some of the organisms depicted by the tree had lived in different habitats.
B. None of the organisms depicted by the tree ate the same foods.
C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns.
D. The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing).
E. Transitional fossils had not been found.


C. Relationships between DNA sequences among the species did not match relationships between skeletal patterns.

Biology & Microbiology

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Metabolism is best described as how fast mitochondria work

Indicate whether the statement is true or false.

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Which of the following is the usual trigger for seed germination?

A) water B) warm temperatures C) oxygen D) sunlight

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Which of the following nutrient cycles relies heavily on the role of bacteria? 

A. carbon cycle B. hydrologic cycle C. nitrogen cycle D. phosphorus cycle  

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During meiosis, a hexaploid hybrid spontaneously eliminates one set of chromosomes (eliminates 1n). What is the most likely result of this deletion?

A. The hybrid will be able to reproduce with one of the parental species. B. The hybrid will be able to reproduce only by self-fertilization. C. The hybrid will no longer be polyploid. D. The hybrid will no longer be able to reproduce.

Biology & Microbiology