1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
valkas [14]
3 years ago
5

Describe a simple nervous system. Give an example of an organism that has a simple nervous system.

Biology
1 answer:
gulaghasi [49]3 years ago
4 0

Answer:

Annelids. Worms are the simplest bilaterian animals, and reveal the basic structure of the bilaterian nervous system in the most straightforward way. As an example, earthworms have dual nerve cords running along the length of the body and merging at the tail and the mouth.

You might be interested in
During an assessment of a neonate born at 33 weeks' gestation, a nurse finds and reports a heart murmur. an echocardiogram revea
Nina [5.8K]

It can be expected that there will be closure of the patent ductus arteriosus for this is the effect of indomethacin. The adverse effect would include platelet dysfunction, decrease gasto-intestinal motility and an increase in necrotizing enterocolitis. With this, the nurse should anticipate the possible outcomes where there will be increase bleeding time and decrease gastro-intestinal function after giving indomethacin.

 

8 0
3 years ago
What are the reactants of the equation for photosynthesis?
dimulka [17.4K]
The reactants of photosynthesis are water, carbon dioxide and light energy.<span>Plants use these reactants to make the food that is essential for plant growth.</span>
4 0
3 years ago
Read 2 more answers
Starting with a protein that has been inserted into the Endoplasmic reticulum (ER) membrane with the Amino (N) terminal in the E
Vika [28.1K]

Answer and Explanation:

Ribosomes are the primary structure for protein synthesis. They can be found in the rough endoplasmic reticulum or floating in the cytosol.  

Free ribosomes are not attached to any cytoplasmic structure or organelle. They synthesize proteins only for internal cell use. Other ribosomes are attached to the membrane of the endoplasmic reticulum and they are in charge of synthesizing membrane proteins or exportation proteins. Free and attached ribosomes are identical and they can alternate their location. This means that although free ribosomes are floating in the cytosol, eventually, they can get attached to the endoplasmic reticulum membrane.  

Synthesis of proteins that are destined to membrane or exportation starts in the cytoplasm with the production of a molecule portion known as a <u>signal aminoacidic sequence</u>. This signal sequence varies between 13 and 36 amino acids, is located in the <u>amino extreme</u> of the synthesizing protein, and when it reaches a certain length, it meets the <u>signal recognizing particle</u>. This particle joins the signal sequence of the protein and leads the synthesizing protein and associated ribosome to a specific region in the Rough endoplasmic reticulum where it continues the protein building. When they reach the membrane of the endoplasmic reticulum, the signal recognizing particle links to a receptor associated with a pore. Meanwhile, the ribosome keeps synthesizing the protein, and the enlarged polypeptidic chain goes forward the reticulum lumen through the pore. While this is happening, another enzyme cuts the signal sequence, an action that requires energy from the ATP hydrolysis. When the new protein synthesis is complete, the polypeptide is released into the reticulum lumen. Here it also happens the protein folding (which is possible by the formation of disulfide bridges of proteins are formed) and the initial stages of glycosylation (the oligosaccharide addition).  

Once membrane proteins are folded in the interior of the endoplasmic reticulum, they are packaged into vesicles and sent to the Golgi complex, where it occurs the final association of carbohydrates with proteins. The Golgi complex sends proteins to their different destinies. Proteins destined to a certain place are packaged all together in the same vesicle and sent to the target organelle. In the case of membrane proteins, they are packaged in vesicles and sent to the cell membrane where they get incrusted.  

There are certain signal sequences in the <u>carboxy-terminal extreme</u> of the protein that plays an important role during the transport of membrane proteins. A signal as simple as one amino acid in the c-terminal extreme is responsible for the correct transport of the molecule through the whole traject until it reaches the membrane.  

4 0
3 years ago
using the process of bacterial transformtion, a student reseacher inserted a plasmid containing a gene for antibiotic resistance
Elena-2011 [213]

Transfer of newly created plasmids to e coli. The bacteria that contains a plasmid with antibiotic resistance will grow in the presence of antibiotic concludes that the insertion was successful.

<h3><u>Explanation:</u></h3>

The plasmid DNA that contains the foreign DNA when integrated with the competent bacteria which is e coli and heated,  plasmid DNA will be entering into the bacteria by means of some smaller pores that are created in the  membranes of the cell.

The plasmid DNA will be copied many times with the help of the replicating mechanism of DNA of the bacteria. Bacteria will grow on a nutrient rich food called agar after the transformation process. Those bacteria that contains a plasmid containing antibiotic resistance only grow in the antibiotic presence. Transformed bacteria will then grow in larger quantity.

4 0
3 years ago
what is the bodys first line of defense against pathogens? A white blood cells B mucous membranes C lymph nodes D red blood cell
True [87]
The body's first line of defense against pathogens are mucous membranes, as they prevent bacteria from entering the body. Hope this helps!
7 0
3 years ago
Read 2 more answers
Other questions:
  • The cells of organisms found in the phylum porifera (sponges) are not organized into tissues. What structures are absent in orga
    14·1 answer
  • What are the two main types of digestive systems? (list the parts) 20 POINTS!!!
    11·1 answer
  • Are monkeys in africa herbivores or carnivore
    12·1 answer
  • The graph shows the change in a fish population over several years. During this same time, artificial fertilizer was used nearby
    10·2 answers
  • Describe the genetic makeup of the offspring of asexual reproduction
    10·1 answer
  • Do you agree that " a cell is a building unit of organism".if yes explain why?​
    8·1 answer
  • What type of systems are constantly changing and requires homeostasis to keep the body working correctly?
    12·1 answer
  • How could we grow bacteria safely? We<br> don't want to risk getting sick.
    14·1 answer
  • What is photosynthesis?<br><br>is anyone free to talk?​
    11·2 answers
  • A 7 Tesla scanner, or 7T scanner is preferable to a 3T scanner in what scenarios?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!