Question

Questions: The scientific term for a living thing is a(n) _____________________ All living things are ___________________. What is the simplest level at which life may exist? Give an example of a multicellular organism and an example of a unicellular organism. What is the difference between unicellular and multicellular organisms? What surrounds a cell and separates it from its environment? All cells perform various jobs or ________________. Are all cells alike?

Answer 1

The scientific term for a living thing is an organism. All living things are composed of cells. Unicellular organisms are made up of a single cell, while multicellular organisms are made up of many cells.

Step-by-step explanation:

A living thing is called an organism, which is the scientific term for a living thing. All living things are composed of one or more cells, which are the basic building blocks of life. The simplest level at which life may exist is a single cell, also known as a unicellular organism. A multicellular organism is made up of many cells. An example of a multicellular organism is a human, while an example of a unicellular organism is bacteria.

Unicellular and multicellular organisms differ in their structure and complexity. Unicellular organisms are made up of a single cell and perform all the essential functions of life within that cell. Multicellular organisms, on the other hand, are made up of multiple cells that are specialized to perform specific functions. These cells work together to support the survival and functioning of the organism as a whole.

A cell is surrounded by a cell membrane, which separates it from its environment. The cell membrane controls the movement of substances in and out of the cell. All cells perform various jobs or functions within an organism. These functions can include obtaining and using energy, reproducing, responding to stimuli, and maintaining homeostasis. However, not all cells are alike in terms of structure and function. Different types of cells have specialized structures and perform specific functions to contribute to the overall functioning of the organism.

Answer 2

The scientific term for a living thing is a(n) organism.

All living things are made up of one or more cells.

The simplest level at which life exists is cell.

Example of a multi-cellular organism is human beings.

Example of a unicellular organism is bacteria like E. coli.

Cell membrane surrounds a cell and separates it from its environment.

All cells perform various jobs or functions.

No, all cells are not alike but these cells share some basic similarities. For example: Neuron is very different from that of epithelial cell but they both have nucleus and other membrane bound organelles.

Differences between unicellular and multi-cellular organisms are as under:

1) Unicellular organisms are simpler than multi-cellular organisms. Multi-cellular organisms are complex.

2) In unicellular organisms a single cell performs all the functions required to sustain a life while in multi-cellular organisms a group of one type of cells perform only one function and other function is performed by another group of cells. These group of cells meant for a specialized function is known as tissue. Various tissues in combination form an organ. Various organs collectively form an organ system. These various grades of organization and specialized organs perform various functions and the co-ordinated work of all the organ systems sustain the life of a multi-cellular organism.

3) Unicellular organisms are less efficient than multi-cellular organisms.

4) Unicellular organisms may be prokaryotic or eukaryotic but multi-cellular organisms are always eukaryotic.