Which of the following statements is NOT true?
a. All isotopes of an element have the same
number of electrons.
b. All isotopes of an element have the same
number of protons.
c. All isotopes of an element have the same
number of neutrons.
d. We refer to isotopes by mass number.
e. 12C and 13C are isotopes.
Answer: c
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You are asked to determine whether an unknown tissue specimen comes from a plant or an animal
Closer inspection with an electron microscope reveals that the cells are connected by small openings lined by extensions of the cell membrane and containing tubules connecting the endomembrane systems of adjacent cells. Which of the following conclusions can be drawn from your observations? A. The openings are plasmodesmata, so the tissue must come from a plant. B. The openings are plasmodesmata, so the tissue must come from an animal. C. The openings are gap junctions, so the tissue must come from a plant. D. The openings are gap junctions, so the tissue must come from an animal. E. The openings could be either gap junctions or plasmodesmata, so it cannot be determined whether the tissue came from a plant or an animal.
Eukaryotes have which of the following characteristics?
a. DNA wrapped around histones b. A single, circular chromosome c. Single-stranded linear chromosomes d. Ribosomal RNA within the chromatin
autotroph (plants, bacteria, algae)
What will be an ideal response?
why plants need to move water
What will be an ideal response?