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Svetach [21]
4 years ago
6

Viral Spikies

Biology
1 answer:
kati45 [8]4 years ago
3 0

Answer:

B)attach specifically to host cell receptors

Explanation:

Viral spikes are one of the envelope proteins. These proteins are coded for by viral genes. Viral spikes project from the envelope surface. They are also called peplomers. One of the functions of these spikes is to specifically interact with the receptors present on the surface of the host cell to mediate the attachment of the virus to the host cell surface. Viral spikes and the host cell surface receptors are complementary to allow their specific binding. For example, the spike protein of the SARS-coronavirus bind specifically to the human host cell receptor ACE2.

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Why does the biodiversity of an ecosystem affect its resilience
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<h3>What is Biodiversity?</h3>

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2 years ago
a rocket is fired straight upward from ground level with an initial velocity of 480Km)hr. After t second , its distance above th
Andru [333]

Answer:

answer

Explanation:

The rocket is 19.5 m above the ground when h=19h=19:

h19.50tttamp;=−8t2+32tamp;=−8t2+32tamp;=−8t2+32t−19.5amp;=−32±322−4(−8)(−19.5)−−−−−−−−−−−−−−−−√2(−8)amp;=−32±1024−624−−−−−−−−−√−16amp;=−32±400−−−√−16amp;=−32±20−16amp;=−32+20−16=0.75amp;=−32−20−16=3.25amp;amp;amp;amp;amp;amp;amp;amp;Substitute h=19.amp;Subtract 19.5 on both sides.amp;Solve for t using the Quadratic Formula.amp;Simplify.amp;Subtract.amp;Evaluate the root.amp;Find the two solutions.

h

19.5

0

t

t

t

​  

 

amp;=−8t  

2

+32t

amp;=−8t  

2

+32t

amp;=−8t  

2

+32t−19.5

amp;=  

2(−8)

−32±  

32  

2

−4(−8)(−19.5)

​  

 

​  

 

amp;=  

−16

−32±  

1024−624

​  

 

​  

 

amp;=  

−16

−32±  

400

​  

 

​  

 

amp;=  

−16

−32±20

​  

 

amp;=  

−16

−32+20

​  

=0.75

amp;=  

−16

−32−20

​  

=3.25

​  

 

amp;

amp;

amp;

amp;

amp;

amp;

amp;

​  

 

amp;Substitute h=19.

amp;Subtract 19.5 on both sides.

amp;Solve for t using the Quadratic Formula.

amp;Simplify.

amp;Subtract.

amp;Evaluate the root.

amp;Find the two solutions.

​  

 

The rocket will then be at least 19.5 m above the ground for the interval 0.75≤t≤3.25  

0.75≤t≤3.25

8 0
3 years ago
50 POINTSS!!!!!!!!!!!!!!!
Neko [114]
C is the correct answer
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kherson [118]
The answer is B, decomposers are like worms, they eat and break down stuff into soil
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