Which of the following technologies seeks to manipulate components of the environment to bring about positive change?
A. ocean acidification
B. genetic engineering
C. geoengineering
D. eutrophication
Answer: C
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The most common form of calcium has 20 protons, 20 nuetrons and 20 electrons. Which of the following element is an isotope of calcium?
a. an atom with 21 protons, 20 neutrons, 21 electrons b. an atom with 20 protons, 20 neutrons, 18 electrons c. an atom with 21 protons, 21 neutrons, 21 electrons d. an atom with 20 protons, 21 neutrons, and 20 electrons
In addition to a vertebral column, all vertebrates have
A. scales. B. gills. C. an open circulatory system. D. a tunic. E. a distinctive head or skull.
What components make up the ribosomes?
A. lipids and rRNA B. proteins and rRNA C. proteins and DNA D. proteins and DNA E. carbohydrates and rRNA
What is the name of the first cervical vertebra? Why?
A. axis, Roman mythology B. atlas, it allows "yes" motion of the head C. axis, it allows the "no" motion of the head D. sphinoid, Egyptian sphinx mythology E. atlas, Greek mythology