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Gemiola [76]
3 years ago
10

how have fresh water and salt water fish adapted to deal with osmosis in their respective environments?

Biology
1 answer:
adelina 88 [10]3 years ago
3 0
Hey I think u forgot abt paying attention in class
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Which component of physical fitness is skill related? A.Flexibility B.cardiorespiratory C.muscular strength D.agility
aniked [119]

Answer:

D.agility

Explanation:

D.agility

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3 years ago
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Segun la informacion que contenga el nucleo¿Como se pueden clasificar las celulas?​
Digiron [165]

Answer:

En biología celular, el núcleo (pl. Núcleos; del latín nucleus o nuculeus, que significa núcleo o semilla) es un orgánulo unido a la membrana que se encuentra en las células eucariotas.

Explanation:

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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
What is the function of Queen Bee?​
never [62]

Explanation:

HONEY BEE QUEEN'S ROLE IN THE COLONY

The Queen Bee plays a vital role in the hive because she is the only female with fully developed ovaries. The queen's two primary purposes are to produce chemical scents that help regulate the unity of the colony and to lay lots of eggs.

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A colleague has used computer modeling to design an improved enzyme. To produce this enzyme, the next step is to:___________.
Effectus [21]

Answer:

C) determine the nucleotide sequence for the improved enzyme.

Explanation:

Computational enzyme design (CED) can be defined as a bioinformatic <em>in silico </em>approach used to model, construct, and enhance enzyme catalysis. CED uses complex optimization algorithms that enable to direct evolution by using computational systems. As a further step, after the modelization of optimal enzymatic activity, bioinformaticians require to determine the nucleotide sequences which will be subsequently used to synthesize the corresponding enzymes.

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