Which one of the following statements CORRECTLY describes the location of compact bone and spongy bone?
A) Spongy bone is located at the ends, and compact bone is located in the core of the shaft of the bone.
B) Compact bone covers the ends of the bone and forms the shaft, and spongy bone is inside the ends, under the compact bone.
C) Spongy bone is found on the outside of the shaft, and compact bone forms the hard core of the shaft.
D) Spongy bone is found throughout the shaft and ends, covered by a thin layer of compact bone.
E) The ends of long bones are solid compact bone, and the shaft is predominantly spongy bone.
B
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Which of the following best explains this phenomenon?
There is a population of frogs living in a pond, 25 are green, 25 are brown, 25 are yellow with green spots and 25 are all yellow. A drought occurred and 75% of the frogs died. The remaining frogs were green and brown, after 25 generations the frogs still were green and brown, yellow frogs never appeared in the population again. A. Sexual selection. B. Balancing selection. C. Bottleneck effect. D. Heterozygote advantage. E. Founder effect.
Which group of organisms are viroids (not viruses) most likely to parasitize?
a. cattle b. fungi c. plants d. fish e. bacteria
One type of symbiotic relationship between a fungus and a plant involves
A. nitrogen fixation. B. lichen. C. mycorrhiza. D. endospores.
Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called
A. cytopathic effects. B. pocks. C. lysogeny. D. budding. E. plaques.