Which of the following germ layer-structure is mismatched?
A. mesoderm-notochord
B. endoderm-lungs or respiratory tube
C. ectoderm-epidermis
D. mesoderm-digestive tract
E. ectoderm-brain
D. mesoderm-digestive tract
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Most cervical cancers are caused by:
a. herpes virus b. human papillomavirus c. hantavirus virus d. streptococcus e. staphylococcus
In _____ gas exchange occurs at the body surface and gas is distributed by diffusion alone
a. earthworms c. frogs b. flatworms d. insects
Curtis's contention that if the last blue whale
were to choke on the last panda bear and it still would not be the end of the world was his way of a. stressing the improper attitude of some environmental activists and to encourage the drilling for oil in Alaska. b. stressing the importance of some bacteria to the biosphere. c. encouraging the study of endangered species. d. shocking an audience into the study of conservation biology. e. doing none of these
What is the ability of a plant to continue to grow throughout its lifetime?
A) determinate growth B) indeterminate growth C) secondary growth D) vernalization