Which nucleotide forms the tail of a completed
messenger RNA transcript?
a. adenine
b. thymine
c. cytosine
d. guanine
e. a combination of more than one of these
A
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How can eating less meat help to protect vulnerable species?
A) It can reduce the amount of pesticides that are applied and subsequently damage aquatic ecosystems. B) It can reduce the need to burn fossil fuels to transport food. C) It can reduce the amount of habitat that is converted to agricultural production D) It can reduce the number of non-native species that compete with native species.
In the periodic table, the value that refers to the number of protons and neutrons is:
A. atomic mass. B. molecular molarity. C. atomic molarity. D. molecular number.
Which of the following is NOT true of
protists?
a. They may reproduce sexually. b. Most have mitochondria. c. Some reproduce asexually by binary fission. d. Most protists are unicellular organisms, but some are multi-celled species. e. Some protists are photoautotrophs
A large groove that runs around the heart, and separates the atria from the ventricles is the
A. anterior interventricular septum. B. posterior interventricular septum. C. coronary sinus. D. coronary sulcus. E. cardiac fissure.