In a spinal cord injury, nerve signals cannot proceed past the location of the injury. What part of the spinal cord was damaged if a person, who is paraplegic, can move their head, arm, neck, and hands, but not their abdomen or legs?
A. thoracic
B. cervical
C. lumbar
D. sacral
E. coccyx
A. thoracic
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Present a rationale for using DNA sequence polymorphisms as an index of genetic diversity. Is genetic diversity directly proportional to evolutionary (phylogenetic) diversity?
What will be an ideal response?
What specifically separates during mitosis?
A) Homologous chromosomes B) Sister chromatids C) The cytoplasm D) The genome
What hypothesis did Luis and Walter Alvarez test in relation to the mass extinction of dinosaurs 65 million years ago (MYA)?
A) The mass extinction 65 MYA was caused by a surge of catastrophic cyclones. B) The mass extinction 65 MYA was caused by a slow but steady increase in climate temperatures. C) The mass extinction 65 MYA was caused by an impact of an extraterrestrial object. D) The mass extinction 65 MYA was caused by the loss of preferred plants for food.
During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments he formulated a principle of
A. niche overlap. B. exploitative competition. C. competitive exclusion. D. interspecific competition. E. metapopulation fluctuation.