Question at position 10 The basic structural and functional unit of living organisms is the __________. cell organelle plasma membrane nucleus单项选择题
A
cell
B
organelle
C
plasma membrane
D
nucleus

Question

Question at position 10 The basic structural and functional unit of living organisms is the __________. cell organelle plasma membrane nucleus

BlackTom AI · Accepted Answer

The question asks for the basic structural and functional unit of living organisms, so we evaluate each option in turn.
Option 1: 'cell' — This option identifies the fundamental unit of life. A cell is the smallest unit that can carry out all the processes of life, including metabolism, growth, and reproduction, thereby fitting the description of the basic unit of living organisms.
Option 2: 'organelle' — An organelle is a specialized subunit within a cell that performs a specific function (like mitochondria or ribosomes). While organelles are essential components of cells, they are not the basic unit of life themselves, which makes this choice incorrect in the context of the question.
Option 3: 'plasma membrane' — The plasma membrane encloses the cell and regulates what enters and exits, serving as a boundary and gateway. It is crucial for cellular function but not the fundamental unit of life; the membrane is a structure within or surrounding the cell, not the unit that embodies life itself.
Option 4: 'nucleus' — The nucleus houses genetic material and controls many cellular activities, but it is an organelle inside certain cells (not present in all organisms or cell types). Thus, it is not the universal basic unit of life, rendering this option inaccurate for the question.
In summary, among the choices provided, the term that best matches the description of the basic structural and functional unit of living organisms is the cell, while the other options describe important components or substructures that depend on cells to exist.

Question at position 10 The basic structural and functional unit of living organisms is the __________. cell organelle plasma membrane nucleus单项选择题

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