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djyliett [7]
3 years ago
10

Explain climate change in the past 100 years

Biology
1 answer:
Jobisdone [24]3 years ago
7 0

In the past 100 years the climate on the Earth has been constantly changing. The climate has been gradually warming up, and that has been affecting all of the planet. The sea levels are on the rise which puts some island nations on the verge of losing their land, the warming up is melting the ice sheets and changing the environment, the desertification process increases, the storms are becoming stronger and more dangerous, droughts become longer...

The main reason for such a rapid change in the climate is attributed to the human activity because the humans have been constantly increasing the levels of the CO2 in the atmosphere in the past 100 years. The process has been going on naturally, but the humans have managed to accelerate it significantly and strengthening the Greenhouse effect more and more.

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Humoral immunity involves ________ cells and ___________
jarptica [38.1K]

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>

8 0
3 years ago
Brainlest help!!! Which ecosystem receives the least sunlight? A)Estuary B)Deep Ocean C)rain forest D)taiga
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Answer:

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Why does the concentration of CO2 go up and down throughout the year?
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the role of plants in carbon cycle

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Deliver water, nutrients, amino acids, etc to the rest of the plant, and afir machanical supoort

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Cell respiration takes place in the mitochondria.
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