Please match the following nutritional types with the statements that most accurately describe them, to test your understanding of the main categories of nutritional types among organisms.
Autotroph
B) An organism that must obtain its carbon in an organic form
C) An organism that gains energy from chemical compounds
D) An organism that acquires energy from light
A) An organism that uses inorganic carbon dioxide as its carbon source
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Why is it necessary to have a standard for the interpretation of stable isotope ratios?
A) A standard is necessary to calculate how much radioactivity was added to a sample. B) A standard is necessary to determine the stable isotope ratio in the absence of biological activity. C) A standard is necessary to determine the weight of each isotopes. D) A standard is necessary to determine the age of the sample.
The division of the cytoplasm occurs ____
a. after prophase b. between prophase and metaphase c. after anaphase d. after telophase e. between anaphase and telophase
Life on earth arose from non-life approximately _________ years ago.
A. 4 million B. 3.4-3.8 billion C. 8 trillion D. 400 billion
The speed of impulse conduction along an axon may be increased by
A) myelin sheaths. B) graded potentials. C) neurotransmitters. D) effector cells.