Unicellular vs Multicellular Organisms — NEET Biology
📚 Practice ConceptAll organisms are composed of cells. Some are composed of a single cell and are called unicellular organisms while others, like us, composed of many cells, are called multicellular organisms.
Consider the following statements: 1. Escherichia coli contains plasmids that may confer antibiotic resistance. 2. Chlamydomonas is a unicellular green alga having a single chloroplast per cell. 3. The ostrich egg is the largest isolated single cell. 4. Nerve cells are among the longest cells in multicellular organisms. 5. Paramecium moves with the help of flagella that show a 9+2 arrangement of microtubules. Which of the above statements are correct?
View solution & NCERT explanation
Correct answer: C — 1, 2, 3 and 4 only
Statement 1 Correct: E. coli has plasmids that provide traits like antibiotic resistance. Statement 2 Correct: Chlamydomonas possesses a single chloroplast per cell. Statement 3 Correct: Ostrich egg is the largest isolated single cell. Statement 4 Correct: Nerve cells are the longest cells in the human body. Statement 5 Incorrect: Paramecium moves by cilia, not flagella, though both show the 9+2 arrangement.
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