Roots contain starch-heavy plastids known as
A. chloroplasts.
B. plastoplasts.
C. chromoplasts.
D. statoliths.
E. strongoliths.
D. statoliths.
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Cloning of human cells for the purpose of treating a patient is referred to as
A) embryo splitting. B) pluripotency. C) somatic cell nuclear transfer. D) medicinal cloning. E) therapeutic cloning.
Which of the following is a sign that scientific information on a website may be unreliable?
A) The site avoids anecdotal evidence. B) The site backs up its claims with references to primary sources. C) A reputable medical establishment maintains the site. D) The site is set up to allow you to buy the product being described.
Alginates are used in many everyday products, including toothpaste and soap. When added to water, they form a thick gel that binds or emulsifies liquids. Alginates come from a group of multicellular stramenopiles that have one pigment that masks all
others and therefore gives these organisms a distinctive, dark color. Alginates are derived from A) green algae. B) brown algae. C) water molds. D) dinoflagellates.
Human skin color likely represents a locally adapted compromise between
A) the need to block UV radiation that causes cancer and the need to absorb sunlight for heat. B) the need to block UV radiation that destroys folate and the need to synthesize vitamin D. C) the need to block UV radiation that destroys folate and the need to absorb sunlight for heat. D) the need to blend in with the environment and the need to absorb sunlight for heat.