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2 years ago

BRAINLIESTTT ASAP!!!

2 answers:

7 0

The temperature influences the appearance of a star because it affects the color of the star. For instance, the hottest stars tend to be white or blue and range from 6,000 - 7,500 K. The coolest stars are red and tend to be under 3,500k.

Juliette [100K]2 years ago

5 0

It can greatly affect the color and size. our sun is 5,778 K and is a yellow color. whereas R136a1 is the most luminous and is a blue color. there is a drastic difference in how the stars will go off based on temperature because a hotter star would be able to burn more elements, and eventually, that will lead to a more brutal death

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How would you make 2.5 liters of an aqueous solution containing 150mM Tris (the MW of Tris is 120g/mole)? (Hint: Do the necessar

lisabon 2012 [21]

Answer:

45 g of the solid Tris will be dissolved in 2.5 liters of water.

Explanation:

Recall that:

Number of moles = molarity x volume

Hence, number of moles of Tris present in 2.5 liters, 150 mM solution:

= 150/1000 x 2.5 = 0.375 moles

Also, recall that:

No of moles of substance = mass/molar mass.

Hence, mass of 0.375 moles substance:

= no of moles of the substance x molar mass of the substance.

= 0.375 x 120 = 45 g.

Therefore, in order to prepare 2.5 liters, 150 mM of an aqueous solution of Tris, 45 g of the solid Tris will be dissolved in 2.5 liters of water.

6 0

3 years ago

Adaptive immunity comprises two branches: humoral immunity and cellular immunity. What are the characteristics of each of the tw

kotegsom [21]

Answer:

Adaptive or acquired immunity is that we acquire throughout our lives through vaccines (active), breast milk (passive) or injection of specific artificial or natural antibodies to a certain pathogen (passive).

The two great arms of this immunity are the humoral and the cellular.

The humoral refers to the cytokines and immunomodulatory molecules that are responsible for transmitting fundamental messages between defense cells in order to coordinate the destruction of the pathogen between them.

Instead, cellular immunity speaks about cell lineage such as b, t, tcd4 lymphocytes, natural killers, plasmacytes, etc.

It can be said that the humoral factor is the one that coordinates the pathways and the relationships between the cells of the acquired immunity, both are important because the two need each other for adaptive immunity to work.

Explanation:

Examples of the humoral factor: pro and anti inflammatory cytokines, interleukins, complement chain, antibodies, TNF alpha, beta, etc.

Examples of cellular factor: plasmacyst, b lymphocyte, t lymphocyte, NT lymphocyte

6 0

2 years ago

A couple has five children with all blood type a. The mothers blood type is O and the fathers blood type is a

pickupchik [31]

Answer:

idk

Explanation:

my bad I don't know it

3 0

2 years ago

¿puede la glicoproteina cambiar de orientación ,quedando la parte glucida hacia adentro de la celula ?

mixas84 [53]

I cannot under stand you sorry can’t help you.

6 0

2 years ago

Read 2 more answers

Which of the following is an advantage of sexual reproduction?

Tom [10]

There were no options but I would assume something around the lines of..
It allows for procreation

5 0

3 years ago