Viruses are often referred to as non-living infectious particles as they lack many characteristics of living organisms like cellular structure. They do not have the ability to carry out reproduction and metabolism without a host cell.
True or False and why?
a
True - if a living organism requires a cellular structure, even if they can reproduce - they are by definition non-living.
b
False - viruses, like bacteria, do not have a cellular structure and yet, bacteria are considered living organisms.
c
False - viruses do have a clear cellular structure, including a cell membrane called an envelope.
d
False - viruses are able to reproduce and use energy without a host cell.
b - False: This statement is incorrect because viruses are not considered living organisms. Although they may exhibit some characteristics of living things, such as reproduction and metabolism, they require a host cell to carry out these processes. Therefore, they are referred to as non-living infectious particles.
Which of the following statements is NOT part of the "Cell Theory"?
a
All living things or organisms are made of cells.
b
All cells arise from preexisting cells.
c
Cell is the basic structural and functional unit of life.
d
All cells arise spontaneously.
d - All cells arise spontaneously. This statement is not part of the Cell Theory. The Cell Theory states that all living things are made up of cells, cells are the basic structural and functional units of life, and all cells arise from preexisting cells through cell division. It does not support the idea of cells arising spontaneously.
Herpes simplex and HIV are excellent examples of which of the following?
a
antigens
b
virus
c
bacteria
d
immunity
b - virus: Herpes simplex and HIV are both viral infections. Therefore, they are considered examples of viruses, not bacteria, antigens, or immunity.
The diffusion of WATER across a selectively permeable membrane is called
a
facilitated diffusion.
b
active transport.
c
osmosis.
d
endo-aqua thermogenesis.
c - osmosis: The diffusion of water across a selectively permeable membrane is referred to as osmosis.
The cellular process shown in the image below would be vital in a cell/organism which ________________
INNER CELL SPACE OUTER CELL SPACE
a
needs to take in a large amount of liquid
b
takes in waste for metabolic uses
c
needs to absorb viral particles
d
releases hormones needed by nearby cells/the organism
a - needs to take in a large amount of liquid: The process shown in the image is likely depicting endocytosis, where substances are engulfed by the cell through the formation of vesicles. This process is commonly used by cells to take in large amounts of liquid or other substances.
When a duck dives into cold water, the capillaries in its skin constrict and move deeper below the surface of the skin. This reaction is an example of
a
homeostasis.
b
respiration.
c
duckosis
d
biosynthesis.