
The organisms which contain a nucleus that is encloses it in a membrane are known as eukaryotes. Plants, animals,

Answer to Problem 1TQ
All the eukaryotic organisms are not multicellular. There are also free living, unicellular eukaryotic organisms.
Therefore, option a is correct.
Explanation of Solution
Justify the reasons for the correct statement:
Most of the eukaryotic organisms are multicellular. Only a few eukaryotes are unicellular. For example, single cell-protists. Therefore, the description that states “they are multicellular” is not true of all eukaryotes.
Option (a) is given as, “They are multicellular”.
Hence, the option (a) is correct.
Justify the reasons for the incorrect statements:
Option (b) is given as, “They have cellular organelles”.
All the eukaryotic organisms contain membrane bound organelles like mitochondria and Golgi bodies. This description is true of all eukaryotes. Hence, it is a wrong answer.
Option (c) is given as, “They have a larger cell size than prokaryotes have”.
The cell size of a eukaryotic organism is complex and larger than the prokaryotic cells. This description is true of all eukaryotes. Hence, it is a wrong answer.
Option (d) is given as, “They have a true nucleus”.
All the eukaryotic organisms contain a true nucleus. This description is true of all eukaryotes. Hence, it is a wrong answer.
Option (e) is given as, “All of the above are characteristics of all eukaryotes”.
All the eukaryotes are not multicellular therefore, all of the given “options” are not the characteristics of eukaryotes. Hence, it is a wrong answer.
Hence, options (b), (c), (d), and (e) are incorrect.
The given description “the eukaryotes are multicellular” is not true of all eukaryotes.
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