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dangina [55]
1 year ago
14

Antibodies:_____.

Biology
1 answer:
Y_Kistochka [10]1 year ago
6 0

Antibodies have a variable region that binds to a specific antigenic determinant.

Antibody

An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein used by the immune system to identify and neutralize foreign objects such as pathogenic bacteria and viruses. The antibody recognizes a unique molecule of the pathogen, called an antigen. Each tip of the "Y" of an antibody contains a paratope (analogous to a lock) that is specific for one particular epitope (analogous to a key) on an antigen, allowing these two structures to bind together with precision. Using this binding mechanism, an antibody can tag a microbe or an infected cell for attack by other parts of the immune system or can neutralize it directly (for example, by blocking a part of a virus that is essential for its invasion).

To learn more about the antibody refer here:

brainly.com/question/13981216

#SPJ4

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The densent ocean water is generally found
Nesterboy [21]
Cold water<span> has a higher density than warm </span>water<span>. </span>Water<span> gets colder with depth because cold, salty </span>ocean water<span> sinks to the bottom of the </span>ocean<span> basins below the less </span>dense<span> warmer </span>water<span> near the surface.</span>
5 0
3 years ago
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Rank the order in which the earliest organisms evolved.
Black_prince [1.1K]

The order in which the earliest organisms evolved -

  • Archaea and bacteria
  • Protists
  • Fungi and shell-less invertebrates
  • Green algae
  • Shelled Invertebrates

On the earth, various kinds of organisms evolve at different geological times, and on their evolution, they consider the oldest or youngest organisms:

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  • Fungi and the shell-less invertebrate, much-developed organisms in terms of body organization and structure. These have membrane-bound, well-defined cell membranes, and a nucleus. They even had a tissue level of organization.
  • Green algae evolve after protists which belong to the division Thallophyta of the plant kingdom. These are photosynthetic as they have chlorophyll in the cell.
  • Shelled Invertebrates are the youngest organisms that evolved recently among these.

Thus, the correct order is -

  • Archaea and bacteria
  • Protists
  • Fungi and shell-less invertebrates
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  • Shelled Invertebrates

Learn more about geological time scale:

brainly.com/question/16528968

5 0
3 years ago
Mount st. helens and the other cascade volcanoes are ________.
scoundrel [369]
Hello There!

I've had this question before so i know the answer is:

<span>Mount st. Helens and the other cascade volcanoes are young, active volcanoes built on a continental margin above a sinking slab of oceanic plate.
</span>
Hope This Helps You!
Good Luck :) 

- Hannah ❤
6 0
3 years ago
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sveticcg [70]
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6 0
3 years ago
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Nat2105 [25]

Answer:

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Explanation:

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