Which of the following elements is a plant micronutrient?
1.Calcium
2.Iron
3.Potassium
4.Sulfur
2
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A pollen grain "knows" when to germinate due
to which of the following? a. differentiation upon contact with the flower b. exposure to moisture c. cell signaling pathways d. electromagnetic impulses from the flower e. none of these
You have information about a particle that contains 7 protons, 8 neutrons, and 8 electrons. Which of the following statements would be true?
A) It has an atomic weight of 23. B) It is an ion. C) It has 8 electrons in its outermost shell. D) It has an atomic number of 15.
Tetracycline antibiotics are frequently included in commercial poultry feed. Why is the practice unwise for human health in the long run?
What will be an ideal response?
How does a prokaryotic cell differ from a eukaryotic cell?
a. A prokaryotic cell has no membrane-enclosed organelles. b. A prokaryotic cell has a plasma membrane. c. A prokaryotic cell contains organelles. d. A prokaryotic cell has a nucleus. e. A prokaryotic cell has DNA.