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PilotLPTM [1.2K]
4 years ago
6

What is the function of the sinoatrial node?

Biology
1 answer:
Aleks04 [339]4 years ago
5 0
Since the other answer got deleted, i'll just answer it for you.

a sinoatrial node is the main pacemaker that begins each heartbeat located in the junctions of superior vena cava and the right atrium. It signals from the node that spread through the atria and determines the heart rates.
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Fully explain in your own words your thoughts on the following questions: Are mutations good or bad for a population?, IN YOUR O
marysya [2.9K]

Answer:

mutations can be either beneficial or harmful depending on the environment

Explanation:

Mutations can be defined as genetic changes in the nucleotide sequence of the genome of one organism. Mutations are usually neutral, but they can also be deleterious and/or beneficial depending on the environment. For example, recessive mutations that cause sickle-cell anemia, which is a recessive genetic disease that affects homo-zygous individuals, have shown to be advantageous for heterozygous individuals living in regions where malaria is endemic. Beneficial mutations can be selected by natural selection, thereby increasing their frequency in the population.

5 0
3 years ago
Where would higher levels of potential evapotranspiration occur on an average?
atroni [7]
Potential evapotranspiration is higher in the summer, on less cloudy days, and closer to the equator, because of the higher levels of solar radiation that provides the energy for evaporation. Evapotranspiration is the sum of evaporation and plant transpiration from the Earth's land and ocean surface to the atmosphere. Evaporation accounts for the movement of water to the air from sources such as the soil, canopy interception, and water bodies. Transpiration accounts for the movement of water within a plant and the subsequent loss of water as vapor through stomata in its leaves. 
5 0
3 years ago
What Metaphor in the World can you use to Describe this part of the Cell?
andreyandreev [35.5K]

Answer:

Plants vs. Animal Cells

Explanation:

4 0
3 years ago
Observe the two plants. Which cellular change affected the structure of second plant?
OLEGan [10]

Answer:

The correct answer is option D which is release of water from the vacuoles.

Explanation:

The difference in second plant from the first one is rigidity. Second one is wilted and not rigid. This is due to the release of water from the vacuoles in the cell of plants.

Vacuoles are present in the center of plant cell. They are usually filled with water and provide structural support to the cell.

In the absence of water filled vacuoles, plants shoots are wilted as in case of second plant.

4 0
3 years ago
How dose land use change as the human population increases
pashok25 [27]

Answer:

Land use goes up as human population goes up. This is because the more people there are alive, the more land that people will be using. Hope this helps :)

5 0
3 years ago
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