1.
Check all statements that are part of the Modern Cell Theory.
Correct Answer(s)
A. Cells are the basic unit of all living things.
C. New cells come from already existing cells.
F. All living organisms are made of cells.
Explanation
The Modern Cell Theory states that cells are the basic unit of all living things, new cells come from already existing cells, and all living organisms are made of cells. This theory emphasizes the fundamental role of cells in all living organisms and the continuous process of cell division and growth. It also highlights the fact that cells do not spontaneously form and that they have a limited lifespan, eventually leading to cell death.
2.
Multicellular organisms are also prokaryotic.
Correct Answer
B. False
Explanation
The statement is false because multicellular organisms are not prokaryotic. Prokaryotic organisms, such as bacteria, lack a nucleus and other membrane-bound organelles, while multicellular organisms, such as plants and animals, have a nucleus and other membrane-bound organelles. Multicellular organisms are eukaryotic, meaning their cells have a true nucleus. Therefore, the correct answer is false.
3.
An example of a prokaryotic organism is bacteria.
Correct Answer
A. True
Explanation
Bacteria are prokaryotic organisms because they lack a nucleus and other membrane-bound organelles. They have a simple cellular structure and their genetic material is not enclosed within a membrane. This distinguishes them from eukaryotic organisms, which have a membrane-bound nucleus and other complex organelles. Bacteria are single-celled microorganisms that can be found in various environments and play important roles in nutrient cycling, decomposition, and human health. Therefore, the statement "An example of a prokaryotic organism is bacteria" is true.
4.
A unicellular organism is a cell with no nucleus.
Correct Answer
A. True
Explanation
A unicellular organism is a type of organism that consists of only one cell. In these organisms, the cell performs all the necessary functions for survival. One characteristic of unicellular organisms is that they lack a nucleus, which is the membrane-bound organelle that contains the genetic material. Instead, the genetic material in unicellular organisms is usually found in the cytoplasm. Therefore, the statement that a unicellular organism is a cell with no nucleus is true.
5.
An example of an eukaryotic organism is a tiger.
Correct Answer
A. True
Explanation
An example of a eukaryotic organism is a tiger because eukaryotes are organisms that have cells with a nucleus and other membrane-bound organelles. Tigers, like all animals, are composed of eukaryotic cells that contain a nucleus and various organelles such as mitochondria and endoplasmic reticulum. This distinguishes them from prokaryotic organisms, such as bacteria, which lack a nucleus and membrane-bound organelles. Therefore, the statement "An example of a eukaryotic organism is a tiger" is true.
6.
The discovery of cells were made possible by the invention of the microscope.
Correct Answer
A. True
Explanation
The invention of the microscope played a crucial role in the discovery of cells. Before the microscope, it was not possible to observe and study cells, as they are too small to be seen with the naked eye. The microscope allowed scientists to magnify and observe cells, leading to the discovery of their existence and the development of the cell theory. Therefore, the statement "The discovery of cells were made possible by the invention of the microscope" is true.
7.
Multicellular cells are very simple and basic, whereas, unicellular cells carry out specialized functions.
Correct Answer
B. False
Explanation
This statement is incorrect. Multicellular cells are actually more complex and specialized compared to unicellular cells. Multicellular organisms are made up of different types of cells that are organized into tissues, organs, and systems, allowing them to carry out a wide range of specialized functions. Unicellular organisms, on the other hand, are made up of only one cell that is capable of performing all necessary functions for survival.
8.
A group of cells is called a(n)
Correct Answer
B. Tissue
Explanation
A group of cells with similar structure and function is called a tissue. Tissues are the building blocks of organs and perform specific functions in the body. Organs are made up of different types of tissues working together to carry out specific tasks. Muscle and nerve cells are types of tissues, but they are not the correct answer for the question.
9.
The only type of cell that can not repair itself is a(n)
Correct Answer
D. Nerve cell
Explanation
Nerve cells, also known as neurons, are unable to repair themselves. Unlike other cells in the body, nerve cells do not have the ability to divide and reproduce. Once damaged, nerve cells cannot regenerate or repair themselves, leading to permanent damage or loss of function. This is why injuries or diseases affecting the nervous system can have long-lasting effects.
10.
What organelles are in a plant cell, but not in an animal cell?
Correct Answer
D. Cell wall and chloroplast
Explanation
The correct answer is cell wall and chloroplast. Plant cells have a cell wall, which provides them with structural support and protection. Animal cells do not have a cell wall. Additionally, plant cells contain chloroplasts, which are responsible for photosynthesis and the production of energy. Animal cells do not have chloroplasts.
11.
An example of an organ is
Correct Answer
A. Heart
Explanation
The correct answer is heart because the heart is a vital organ in the human body that pumps blood and circulates it throughout the body. It plays a crucial role in maintaining the body's overall function and is essential for survival.
12.
The structures that make up a cell and have specialized functions are
Correct Answer
C. Organelles
Explanation
Organelles are the structures within a cell that have specialized functions. They are like the organs of a cell, performing specific tasks to ensure the cell's survival and proper functioning. Examples of organelles include the nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus. Each organelle has a specific role, such as storing genetic material (nucleus), producing energy (mitochondria), or synthesizing proteins (endoplasmic reticulum). These organelles work together to carry out the various processes necessary for a cell's survival and functioning.
13.
The following is an example of which life process:A beaver is an organism composed of many different types of cells.
Correct Answer
A. All living things contain cells.
Explanation
The given statement "A beaver is an organism composed of many different types of cells" indicates that the beaver is a living thing composed of cells. This aligns with the concept that all living things contain cells, which is a fundamental characteristic of life. It is a basic understanding in biology that cells are the building blocks of life and are present in all living organisms. Therefore, the statement supports the idea that all living things contain cells.
14.
The following is an example of which life process:Over three years, Tim's height has increased from 5'4" to 5'11".
Correct Answer
B. All living things grow.
Explanation
The given example of Tim's height increasing from 5'4" to 5'11" demonstrates the life process of growth. Growth is a characteristic of all living things, where they increase in size, develop, and mature over time. This process is observed in plants, animals, and humans, as they go through various stages of development and experience physical changes. Tim's increase in height indicates that he is undergoing growth, which is a fundamental life process exhibited by all living organisms.
15.
The following is an example of which life process:Green plants produce their own food through the process of photosynthesis.
Correct Answer
B. All living things obtain and use energy.
Explanation
This answer is correct because obtaining and using energy is a fundamental life process that all living things must engage in. Photosynthesis, which is mentioned in the question, is a process by which green plants convert sunlight into energy-rich molecules, such as glucose, which they can use as a source of energy. Therefore, the ability of green plants to produce their own food through photosynthesis is a specific example of how they obtain and use energy.
16.
The following is an example of which life process:When a human steps out into the cold air, the body begins shiver in order to keep its temperature at 98.6 degrees Fahrenheit.
Correct Answer
D. All living things respond to stimuli.
Explanation
When a human steps out into the cold air, their body shivers in order to generate heat and maintain its temperature at 98.6 degrees Fahrenheit. This response to the cold stimulus is a characteristic of living organisms, as they have the ability to detect and respond to changes in their environment. This process is known as thermoregulation, which is a part of the broader life process of responding to stimuli.
17.
Identify the 7 life processes.
Correct Answer(s)
A. Growth
B. Reproduction
E. Nutrition
F. Respiration
H. Response to stimuli
I. Movement
J. Excretion
Explanation
The 7 life processes are growth, reproduction, nutrition, respiration, response to stimuli, movement, and excretion. These processes are essential for the survival and functioning of living organisms. Growth refers to an increase in size or number of cells. Reproduction involves the production of offspring. Nutrition is the process of obtaining and utilizing nutrients for energy and growth. Respiration is the process of obtaining energy from food through the exchange of gases. Response to stimuli is the ability to react to changes in the environment. Movement refers to the ability to change position or location. Excretion is the process of eliminating waste products from the body.