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
ch4aika [34]
2 years ago
15

An ecosystem contains two types of giraffes, some with short necks and others with long necks. The distribution of this trait is

equal among the population. A disease causes low-lying shrubs to die out. The long-necked giraffes can access more food, so they have a better chance of surviving to reproductive age. After several generations, all the giraffes ha
Biology
1 answer:
Lyrx [107]2 years ago
5 0
The population of the short neck giraffes will shrink, and the population of the long neck giraffes will not change.
You might be interested in
What would happen if the cell did not have (a)nucleus (b)endoplasmic reticulum (c)golgi apparatus (d)lysosomes (e)vacuole (plant
Ksju [112]
Without those parts, the cell wouldnt be able to perform its basic function and thus die
4 0
3 years ago
Can mRNA coding for a protein destined to be embedded in the plasma membrane associate with rough ER prior to the initiation of
Debora [2.8K]

Answer:

mRNA must start membrane protein in the cytoplasm and, after that, continue it in the rough ER.

Explanation:

Protein synthesis is initiated when mRNA meets a free ribosome, the primary structure for protein synthesis. Ribosomes can be found in the r<em>ough endoplasmic reticulum</em> or floating in the cytosol. They read the mRNA code and add the correct amino acid using transference RNA to build the protein.

The <u>rough endoplasmic reticulum</u> is in charge of the synthesis and transport of the membrane proteins. It is also in charge of the latest protein modifications after transduction. Synthesis of membrane proteins <u>starts in the cytoplasm</u> with the production of a molecule portion known as a signal sequence. This portion leads the synthesizing protein and associated ribosome to a specific region in the Rough endoplasmic reticulum where it continues the protein building.

Membrane proteins are synthesized in the endoplasmic reticulum and <em>sent to the Golgi complex in vesicles</em>, where it happens the final association of carbohydrates with proteins. Finally, protein is transported <em>from the Golgi complex to its final destiny, the membrane. </em>

4 0
2 years ago
Which statement is true of both the X and Y chromosomes?
katen-ka-za [31]
C they are always found in homologous pairs
7 0
3 years ago
How to get high affinity antibody?
Anit [1.1K]

Human monoclonal antibody (mAbs) are emerging in the field of cancer therapy and have become an increasing proportion of new drugs that are recently approved. Although there are some methods to obtain antigen-specific mAbs from human B cells, it is generally impossible to directly immunize human beings with antigens of interest. For example, for infectious agents, those approaches are largely restricted. To solve these obstacles, two main approaches have been developed; either by humanizing antigen-specific antibodies from small experimental animals (which is laborious due to the great genetic differences from humans) or rely on the in vitro selection of antigen-specific binders from human antibody repertoires. However, the human mAbs developed by these methods are usually with low affinity.

We are now coming up with a much better idea that is humanizing non-human primates mAbs instead of murine mAbs. Due to the close genetic relationship with humans, immunized NHPs have more potential to be isolated with high affinity antibody to human target than other experimental species, such as mouse, rat and rabbit. In addition, with appropriate method, NHP antibodies are much<span> easier to be humanized</span> without any loss of affinity compared to widely used murine antibodies. 

Resource: http://www.creative-biolabs.com/High-Affi-TM-Human-Antibody-Discovery.html

4 0
2 years ago
Explain the interaction that occurs between a t-helper lymphocyte and a b cell when the b cell is being induced to produce peanu
Paraphin [41]

Answer:

           According to Dr. Ray Schiling (member of the American Academy of Anti-aging medicine) about 1.5 million people suffer from peanut allergies. The seeds of peanut (<em>Arachis hypogea</em>) contain an array of allergens that can induce the production of IgE specific antibodies predisposed individuals. Ara1 and Ara2 are most common seed storage protein that cause allergy. Other allergen proteins such as Ara3 to Ara 17 have also been identified that cause allergy.  


Entry of peanut allergen into body

When peanut allergens enter the body of an individuals it leads to development of different symptoms like itchy skin, tingling sensation, nausea, runny nose and anaphylaxis.  

Allergic response

There are two subsets of T-cells Th1 and Th2. Both invoke different response to allergens. Th1 direct a non-allergic response while Th2 direct allergic response ranging from releasing of histamine to anaphylactic response. The presence of IL-12 cytokines direct a Th1 based, nonspecific response.  


Mechanism of allergic response (interaction between helper T cell and B cell)

Step 1.  

           When allergen enter to body they are encountered by B cells. Immunoglobulin receptors on the surface of B cells recognize antigen (Peanut allergens) and get attached, which are then internalized and processed. Within B cells the fragments of antigens combine with HLA class 2 proteins.  

Step 2

             HLA class 2 with antigen fragments (peanut allergens) then display on the surface of B cells.

Step 3

            Receptors on the surface of helper T cells recognizes the complex of HLA class 2 and antigen fragments (peanut allergen) and is activated to produce cytokines, which activate the B cells.  

Step 4

             B cell is activated by cytokines and begins clonal expansion. Some of the progeny become anti-body producing plasma cells while other become memory B cells.  


7 0
3 years ago
Other questions:
  • There is only one immune system, but its responses aften involve components of more than one type of immunity
    11·2 answers
  • Hey everyone!! Please help me in science please. I will give brainliest 30 points
    6·2 answers
  • Using the data below, determine which type of moth is best adapted to its environment.
    12·2 answers
  • How were the Buddha, Jesus, and Muhammad similar?
    5·2 answers
  • Where does meiosis occurs
    12·1 answer
  • Many scientists believe that greenhouse gases:
    10·1 answer
  • Does anyone know the name for this?
    6·2 answers
  • The surface of the earth is divided into more than 50 large plates.? true or false?
    13·1 answer
  • Match each image to the correct cell of the cell cycle I will mark brainiest
    6·2 answers
  • Why is radioactive dating able to be used with such<br> accuracy?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!