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Volgvan
3 years ago
14

When an antigen attacks the body, it activates adaptive immunity. This adaptive immunity produces a strong response when it enco

unters the same antigen for the second time. Which feature of adaptive immunity is essential for this kind of response?
Biology
2 answers:
crimeas [40]3 years ago
7 0

Answer:

A) the ability to remember the antigen it encounters

Adaptative immunity reacts in a more general way producing nonspecific antibodies against the foreign antigen when the organism is first attacked by that foreign antigen. The second time around, when the organism is faced again with the same foreign antigen, it produces a much stronger response because it memorised the antigen and is not strange anymore so the response can be more specific, quicker, and effective.

Explanation:

Maru [420]3 years ago
7 0

Answer:

Explanation:

memory T cells plays an important role in fighting against microbe which encounter the body for second time

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An explanation of how the natural world works.
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3 years ago
Turtles and leopards all have four limbs and an amnion. True The common ancestor of lamprey and lancelets had a vertebral column
kramer

Answer:

Explanation:

The objective is to conclude if the statements are true or false based on facts.

1)\text{ Turtles and leopards all have four limbs and an amnion.  } True

2) \text{The common ancestor of lamprey and lancelets had a vertebral column. } False

This is because their ancestor is a Chordate who doesn't have a vertebral column but a notochord.

3) True

\text{Frogs are the sister taxa of turtles and leopards because they are more }

\text{related to a common ancestor.}

4) \text{Leopards and bass are more closely related than turtles and bass}  False

This is because the bass is a fish that possess some characteristics traits related to an amphibian (turtle) as compared to a mammal(leopard).

5) \text{The taxon that shares the most recent common ancestor with frogs is the bass.} False

The taxa of turtles share a more common ancestor with frogs compared to bass.

6) \text{Leopards and lancelets have no common ancestor. } False

The common distant ancestor for leopards and lancelets is known as  Chordates

4 0
3 years ago
What are the dated fossils called that help scientists to identify or date rocks or fossils?
mamaluj [8]

Answer:

Index fossils

Explanation:

The index fossils are the fossils that come in very handy for the geologists when it comes to identifying or dating rock samples or other fossils. The reason for this is that the index fossils have already been dated. They are fossils that are very commonly found, wide dispersed, are easy to be identified, and are limited to only a certain geological period. These characteristics make them an excellent indicator for the dating of the rock layers in which they are found, or the fossils found in the same layers with them, without conducting further examinations.

5 0
3 years ago
Information related to the organisms found on Earth during
djverab [1.8K]

Answer:

D

Explanation:

8 0
3 years ago
PLEASE HELP ME CORRECT ANSWERS ONLY
marysya [2.9K]

Answer:

Choice one: Met, Phe, Leu, Pro, Lys, Stop

Explanation:

It does not want you to find the pairs of the mRNA, just find what protein each part of that strand hooks up to. Follow the flow of the chart, and you get your proteins.

8 0
3 years ago
Read 2 more answers
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