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sdas [7]
2 years ago
10

In the heart, an action potential originates in the __________.

Biology
1 answer:
jeka57 [31]2 years ago
3 0

Answer:

sinoatrial (SA) node

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Where is ATP made in the chloroplast? What other activated carrier is produced in the space?
miskamm [114]

Answer:

The correct answer will be -

1. ATP production- Thylakoid membrane

2. Activated carrier- NADPH.

Explanation:

The photosynthesis reactions take place in the chloroplast which is divided into three membranes: outer, inner and thylakoid membrane. The light-dependent reactions take place in the thylakoid membrane which helps in the production of ATP molecules along with the activated carrier molecule called NADPH.  

The ATP molecule is synthesized by the ATP synthase enzyme located in the thylakoid membrane where electron transport chain produces a gradient of protons. These protons help in the production of ATP synthesis explained through the chemi-osmotic model.

Thus, the Thylakoid membrane and the NADPH are the correct answer.

5 0
3 years ago
This series of diagrams represent the steps of mitosis. Label each diagram and describe what occurs during each step
ElenaW [278]
Each of the problem numbers.

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Modern cell theory is best described as being based on
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<span>A) similar evidence collected in multiple experiments by different people

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4 0
3 years ago
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Anton [14]
The third one.……...................
3 0
3 years ago
Which biome has the least precipitation?
Korvikt [17]

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.

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