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Karo-lina-s [1.5K]
3 years ago
13

What causes solid water to be less dense than liquid water?

Biology
1 answer:
Nostrana [21]3 years ago
4 0
A bro jeje is the A hidrogen bonds

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How does the height of the tropopause change from day to night?
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Arrange the following in the proper order in which they occur during clonal selection. 1. Helper T cells are activated. 2. Macro
liubo4ka [24]

Answer:

1) Macrophages ingest antigen 2) Helper T cells are activated 3) B cells differentiate into plasma cells and memory cells.

Explanation:

Innate immunity and adaptive immunity provide protection against foreign invaders. Innate immunity is non specific and adaptive immunity is specific immune response; includes the production of antibody after a sequence of events.

  • When an antigen enters the body the phagocytic cells such as macrophages and dendritic cells ingest the antigen by a process called as phagocytosis. These cells act as antigen presenting cells and present it to T cells.
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8 0
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Why are the offspring of flowering plants genetically different from the parent plants
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The elements least likely to form bonds are found in which group?
Zigmanuir [339]

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Noble gases

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Noble steam, any of the seven chemical elements that make up the periodic table in group 18.

Within normal conditions, noble gases are colorless, odorless, tasteless, and nonflammable gases. The noble gases are grouped according to their boiling point in the periodic table. Noble gases, from incandescent lamps to excimer lasers, are commonly used in distinct areas.

7 0
2 years ago
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