The increase in life expectancy in the United States in the last 100 years is mainly due to healthier lifestyles slowing the process of ageing
Indicate whether the statement is true or false
FALSE
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Why have plants been implicated in the Ordovician and Devonian glaciations, but not the Proterozoic glaciations?
A. Proterozoic plants used anoxygenic photosynthesis. B. Proterozoic plants had simple root structures that did not increase rock weathering. C. Land plants had not yet evolved during the Proterozoic. D. The non-vascular plants present during the Proterozoic did not contribute to global nutrient cycles. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about glaciation? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Synathroses
What will be an ideal response?
Which one of the following sexually transmitted diseases is currently the most prevalent in the United States?
A) gonorrhea B) syphilis C) AIDS D) genital warts E) chlamydia
Special bone cells, called ________, are responsible for laying down new bone.
A. osteoclasts B. Haversian canals C. osteocytes D. osteoblasts