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Bilateral symmetry is said to have evolved in those ancestral forms which started moving on ocean floor. A crawling predator is expected to encounter food or its prey with the advancing end. So mouth developed at the anterior end. The sensory organs and coordinating brain also developed near mouth at the front end, enabling the animals to sense and recognize edible or non-edible organisms. This is expected to initiate the development of brain and head, a process known as cephalisation.
Wiki User
∙ 11y ago
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∙ 9y agoBilateral symmetry is not only advantageous to motile organisms, but it is essential for correct movement. For example, humans have two legs, dogs have four legs, and birds have two wings. Take one of these appendages away and, if it is not replaced, movement becomes hindered.
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∙ 14y agocill your sellf
De'Mauri Mack
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What makes organisms motile?
An organism is motile if it has the power to move.
Are protozoa motile?
air, water, and other organisms
What are motile bacteria?
Motile bacteria are bacteria which can move. Examples; Spirochetes move using a corkscrew motion powered by an axial filament. Campylobacter jejuni has two flagella. Pseudomonas secreat slime and can glide over surfaces.
What are the main characteristices of organisms?
1-living 2-can breath 3-motile 1-living 2-can breath 3-motile
How is SIM medium used to detect motility?
SIM agar may be used to detect motile organisms. Motility is recognized when culture growth (turbidity) of flagellated organisms is not restricted to the line of inoculation. Growth of non-motile organisms is confined to the line of inoculation.
Can Some motile organisms produce growth on artificial media with a spreading edge?
Yes
What are examples of motile?
staphylococcus,shigella
Is cuttlefish nekton?
Cuttlefish ARE nekton because they are aquatic, motile (self-propelled) living organisms.
What aspect of microbial properties can be observed via stab inoculation technique?
The motility of a microorganism can be observed. Motile organisms, using the flagellum, will move away from the stab line, hence will appear to have "diffused" into the medium. Non-motile organisms will remain in the stab line.
Are organisms in the phylum porifera motile?
Sponges are normally stationary organisms, they attacj=h themselves to a surface when very small and grow in that same place.
Are plants motile or non-motile?
If an organism is motile then it can move. Plants are not motile.
Are viruses free-living organisms?
viruses are not technically alive because they cant reproduce by themselves, eat, break down food, or grow
