The answer is atrial depolarization. The P wave of a normal electrocardiogram specifies atrial depolarization. In addition, depolarization happens in the four compartments of the heart which is both atria first and in both ventricles. The sinoatrial or as called as SA node on the wall of the right atrium starts depolarization in the right and left atria that can cause the contraction in which it is symbolized by the P wave on an electrocardiogram.
The rods originally contain the fuel for nuclear reactions, which mean they are highly radioactive. The radiation they emit is very dangerous and harmful to all types of life; therefore, they must be handled with care and disposed of properly to minimize damage because of them.
Answer:
animal cells: They do not have a cell wall, and have multiple vacuoles.
pplant cells: They have a cell wall, chloroplast, and can perform photosynthesis, and also contains a single large vacuole which is used for storage.
Explanation:
The materials plants need in order to perform photosynthesis are Water and carbon dioxide.
<h3>What is photosynthesis?</h3>
Photosynthesis is a process of converting light energy into chemical energy.
Photosynthesis is performed by chlorophyll-containing plants to produce their food.
The process of photosynthesis is carried out in the presence of sunlight.
It requires water, carbon dioxide, and sunlight.
Thus, the correct option is B, water, and carbon dioxide.
Learn more about photosynthesis, here
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Answer: Option C.
Tundra
Explanation:
Tundra is a biome that has low Precipitation. Precipitation is a form of water that fall from the atmosphere to the Earth surface. Which could be inform of snow, sleet e.t.c.
Tundra is the coldest of all types of biomes. It has low temperature, little precipitation,low nutrients. It is located near the north Pole of the Earth. It is characterized by permafrost, permanent frozen layer on its surface.
