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Kobotan [32]
3 years ago
10

In a flower, the female sex cell is produced by what

Biology
1 answer:
Sholpan [36]3 years ago
4 0
The ovary creates ovules, which are female sex cells
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When the continents are_, they receive less sunlight
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When the continents are at the Earths poles, they receive less sunlight.
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Where does the urea in the urine come from?
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Explanation:

8 0
2 years ago
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Humoral immunity involves ________ cells and ___________
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Answer:

Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

Explanation:

Humoral immunity is defined as the immunity which is mediated by several macromolecules presnet in the extracellular fluids such as antibodies, certain antimicrobial peptides, and  complement proteins.

Humoral immunity allows to distinguishes two groups of foreign substances. it involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood. </u>

Humoral immunity begins when an antigens bind to B cells.  Interleukins or helper T cells provides a secondary signal to the B cells that activates a B cell and allows B cell proliferation.  which roduces produce plasma cells. The plasma cell then produces antibodies which are identical to the specific antigen. The antibodies are the released and circulate through the body, binding to antigens.  B cells the further produces memory cellss for future immunity.

So, Humoral immunity involves <u>B cells</u> and<u> recognize antigens or pathogens in the lymph or blood.</u>

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3 years ago
Which lists the correct order of evolutionary history?
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<em>hop</em><em>e</em><em> this</em><em> answer</em><em> </em><em>correct</em><em> </em><em>(</em><em>^</em><em>^</em><em>)</em>

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