Why might the xiphoid process be missing from the sternum in a set of human remains?
What will be an ideal response?
The remains are from an adult younger than 40 years of age, and the hyaline cartilage does not preserve as well as bone
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Adaptive radiation could resulted in which of the following?
A. Many ancestral species evolve into one of descendant species that differ greatly in habitat, form and behavior from the ancestral species. B. The evolution of the horse which depended on the change in food supply. C. The abundant species of Hawaiian honeycreepers. D. The 1,000 species of Drosophila found dispersed throughout the Hawaiian Islands. E. The abundant species of Hawaiian honeycreepers and Drosophila found on the Hawaiian Islands.
During prophase I of meiosis
1.chromosomes condense. 2.chromosomes are aligned on the equator of the cell. 3.nuclear envelopes form in some species but not in others. 4.homologous chromosomes are separated. 5.DNA is replicated.
The type of tissue forming the covering around muscle fibers is:
a. epithelial tissue. b. connective tissue. c. nervous tissue. d. specialized muscle tissue. e. synovial fluid
Which of the following skin derivatives is incorrectly matched with the organism on which it is found?
A. birds - feathers B. mammals - hair and nails C. fishes - bony scales D. amphibians - epidermal scales