Plants produce sugars from

a. oxygen and carbon dioxide.
b. sunlight and water.
c. oxygen and water.
d. carbon dioxide and water.
e. iron and water.


Answer: d

Biology & Microbiology

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Consider a mutant organism that is unable to make the amino acid arginine. Knowing that the metabolic pathway for

arginine production is ornithine ® citrulline ® arginine, you test the ability of the mutant to grow in the presence of just one of these compounds. You find that the mutant can grow in the presence of arginine, but not in the presence of citrulline or ornithine. From this, you can conclude that the product of the mutant gene is most directly involved in the production of ____.

a. arginine from ornithine b. arginine from citrulline c. citrulline from ornithine d. ornithine from arginine e. citrulline from arginine

Biology & Microbiology

To grow on artificial medium, prototrophic bacteria require

A) sunlight. B) amino acid supplements. C) vitamin supplements. D) All of these E) None of these

Biology & Microbiology

What are some ways that hypertension can kill?

What will be an ideal response?

Biology & Microbiology

The stimulus that causes the parathyroid glands to secrete parathyroid hormone is ________

Fill in the blank(s) with the appropriate word.

Biology & Microbiology