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natita [175]
3 years ago
6

Type of symmetry in which body parts are arranged in a circle around a central point

Biology
1 answer:
lukranit [14]3 years ago
8 0
Type of symmetry in which body parts are arranged in a circle around a central point is called radial symmetry.  
<span>
This type of symmetry is characteristic for the sessile animals like Cnidaria and Echinodermata. Organisms with radial symmetry have no left or right sides, they have a top and a bottom surface, or a front and a back.</span>
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During an action potential, which of the following changes significantly? Group of answer choices
tino4ka555 [31]

The process is ocurring by steps, starting with depolarization.

1- Na+ permeability > K+ permeability

2- Vm (membrane potential) approaches ENa+ (quilibrium potential for potassium)

3- K+ permeability > Na+ permeability

4- Vm (membrane potential) approaches EK+ (quilibrium potential for potassium)

4 0
3 years ago
How do i do this:
elena-14-01-66 [18.8K]

Answer:

multicellular animal,plant,fungi,microorganisms

8 0
2 years ago
What would a solar eclipse look like if the Moon were smaller than it is now?
Step2247 [10]

Answer

Explanation:

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3 0
3 years ago
Improve the student’s model of gas exchange by drawing the missing component.
larisa [96]

Answer:

The diagram can be improved by:

                                  Lungs

                                       ↓

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                                       ↓

                      Red blood cells (carrying oxygen)

                                       ↓

                  Organs (like stomach and liver etc) from where carbon    

                               is taken and oxygen is supplied

                                         ↓

                   RBC's carrying Carbon dioxide to the lungs

The component which is missing in the diagram are the organs where exchange of gases occurs. The red blood cells carry oxygenated blood from the lungs to all parts of the body and carries the wast carbon dioxide gas from them back to the lungs. The carbon dioxide is then exhaled by the lungs.

8 0
3 years ago
Read 2 more answers
The epidermis is composed of five cell types. match each type to its description.
WITCHER [35]
Listed under are the 5 different type of cells found in the epidermis and their description:

1. Stem cells
These are what you call undifferentiated cells. These are cells found in the stratum basale, which is the deapest layer of the epidermis. These cells divide to create keratinocytes. 

2. Keratinocytes
The make up the majority of the cells in the epidermis. They synthesize keratin which are proteins that make up your hair, skin, and nails. They can also be found in other organs inside your body.  

3. Melanocytes
These cells can only be found in the stratum basale. They synthesize melanin with a brown to black pigment. These dark pigments serves as protection for the skin from harmful UV rays. 

4.Merkel cells
Merkel cells are also known as <em>tactile cells</em>. They are the sensory receptor for touch. Merkel cells and the nerve fiber together are called the Merkel disc. 

5. Dentritic cells
They are also known as <em>Langerhans cells</em>. They can be found in two layers of the epidermis: the stratum spinosm; and stratum granulosm. They are what you call macrophages that come from the bone marrow. They serve as immune cells that provide protection against toxins, microbes and other pathogens that try to penetrate the skin. 

Hope you find some information above that will help you.
3 0
3 years ago
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