What does a pine tree an octopus and bacterium have in common?
They both are enclosed with a cell membrane filled with cytoplasm. In all the cells ribosomes are responsible for the protein synthesis. Both the cells have DNA as genetic material. The cells of pine tree and bacteria have cell wall whereas octopus lacks cell wall.
What are the three rules of the cell theory?
The three principles of cell theory are: All living organisms are composed of one or more cells. Cell is the basic structural and functional unit of living organisms. All cells arise from pre-existing cells.
Which component of the cell theory argues?
Which component of the cell theory argues against life on Earth evolving from inorganic molecules? All organisms are made of one or more cells, the cell is the fundamental unit of life, and all cells come from preexisting cells.
What would be the reason for a scientist engineering a cell for a high surface area to volume ratio Group of answer choices?
What would be the reason for a scientist engineering a cell for a high surface area-to-volume ratio? To maximize the relative surface area to exchange nutrients, water, and waste.
What is the theory of endosymbiosis based on?
The word endosymbiosis means living together within (endo = within, sym = together, bio = living). Endosymbiosis refers to the theory that organelles originated from independent cells that were engulfed by another cell.
What is the main function of the bacterial cell wall quizlet?
What is the function of a bacterial cell wall? To provide bacteria with shape and protection against osmotic lysis and mechanical forces.
What is cell theory briefly describe the essential features of a prokaryotic cell?
The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms. Cells arise from pre-existing cells.
What is a cell?
(sel) In biology, the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell.
Which cells are bacteria?
Prokaryotic cells (i.e., Bacteria and Archaea) are fundamentally different from the eukaryotic cells that constitute other forms of life. Prokaryotic cells are defined by a much simpler design than is found in eukaryotic cells.
How did Rudolf Virchow contribute to the cell theory?
In 1855, at the age of 34, he published his now famous aphorism “omnis cellula e cellula” (“every cell stems from another cell”). With this approach Virchow launched the field of cellular pathology. He stated that all diseases involve changes in normal cells, that is, all pathology ultimately is cellular pathology.
Why is it important that a cell have a large surface area relative to its volume?
A high surface area to volume ratio is important to cells. When the surface area is greater than volume, there is more plasma membrane relative to the inside of the cell. This allows for materials to be transported as efficiently as possible into, out of, and around the cell.
How does the ratio of surface area to volume change if you increase the length of the side?
As you can see from the formulas, surface area is a square function (side 2 x 6), while volume is a cubic function (side)3. As a result, as the size of an object increases, its ratio of surface area to volume decreases. Conversely, as the size of an object decreases, its ratio of surface area to volume increases.
What is a bacterial endosymbiont?
Endosymbionts, such as Wolbachia, Rickettsia, and Cardinium, are a type of bacteria commonly found in arthropod species including insects, spiders, crustaceans, and mites, as well as in other invertebrates such as filarial nematodes (Stouthamer et al.
How did endosymbiosis between an algae and a bacterium start?
Scientists speculate that chloroplasts and algae arose through a series of endosymbiotic events. The first endosymbiotic event occurred when a eukaryotic cell engulfed a prokaryote (SF Fig. 2.4 Step 3). This process, known as primary endosymbiosis, created the mitochondrion.
What is the main function of the bacterial cell wall?
The cell wall has multiple functions during bacterial growth, including maintaining bacterial cell integrity and shape as well as resisting internal turgor pressure. Furthermore, it must remain flexible to accommodate the remodeling that is required for cell division and growth.
What is the function of bacteria cell?
Cytoplasm – The cytoplasm, or protoplasm, of bacterial cells is where the functions for cell growth, metabolism, and replication are carried out. It is a gel-like matrix composed of water, enzymes, nutrients, wastes, and gases and contains cell structures such as ribosomes, a chromosome, and plasmids.
Which of the following describes a structure that both prokaryotic and eukaryotic cells have in common?
Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA.
How do the functions of cell organelles support the life processes of plants and animals?
Plant & Animal Cells Have Organelles. Organelles are parts of a cell that help the cell to function and stay organized. The mitochondria, for example, is where sugars are used to produce energy. The vacuole is a membrane bound organelle that stores fluids. The cell membrane controls what comes in and out of a cell.
What is a cell for kids?
The cell is the smallest unit with the basic properties of life. Some tiny organisms, such as bacteria and yeast, consist of only one cell. Large plants and animals have many billions of cells. Human beings are made up of more than 75 trillion cells.
What are tissues?
There are 4 basic types of tissue: connective tissue, epithelial tissue, muscle tissue, and nervous tissue. Connective tissue supports other tissues and binds them together (bone, blood, and lymph tissues). Epithelial tissue provides a covering (skin, the linings of the various passages inside the body).
Is bacteria an animal or plant?
Bacteria are neither animals nor plants. With bacteria sharing similar processes and characteristics to plants and animals it's understandable why people would ask, “are bacteria animals or plants?”.
What do bacteria do?
Some of them help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese. But infectious bacteria can make you ill. They reproduce quickly in your body.
Who is Rudolf Virchow and what did he discover?
Virchow's many discoveries include finding cells in bone and connective tissue and describing substances such as myelin. He was the first person to recognize leukemia. He was also the first person to explain the mechanism of pulmonary thromboembolism.
What was Rudolf Virchow trying to prove through?
The work of Robert Virchow was trying to prove that cells came from preexisting cells.
Why are cellular transport and cellular communication factors that limit cell size?
Why are cellular transport and cellular communication factors that limit cell size? Cellular communication has the need for signaling proteins to move throughout the cell. Cellular transport is less efficient if the cell is too big.
How could cell growth create a problem that is similar to a traffic jam?
How could cell growth create a problem that is similar to traffic jam? If a cell got too large, it would be more difficult to get sufficient amounts of oxygen and nutrients in and waste products out.
What is a sphere in math?
sphere, In geometry, the set of all points in three-dimensional space lying the same distance (the radius) from a given point (the centre), or the result of rotating a circle about one of its diameters. The components and properties of a sphere are analogous to those of a circle.
How does cell volume affect nutrient exchange between the cell and its external environment?
How does cell volume affect nutrient exchange between the cell and its external environment? The ratio of cell volume to surface area determines the efficiency of nutrient exchange.
What are 2 examples of endosymbiosis?
Termites and their protozoan gut inhabitants are one example of the endosymbiont living within a cavity of the associate organism. Another common example is the fauna in the stomach of ruminating animals, or animals that regurgitate and rechew food particles, such as deer, cattle, and antelope.
What does the endosymbiotic theory explain the origin of?
The Endosymbiotic Theory states that the mitochondria and chloroplast in eukaryotic cells were once aerobic bacteria (prokaryote) that were ingested by a large anaerobic bacteria (prokaryote). This theory explains the origin of eukaryotic cells.