Its function is to provide energy for many cellular reactions.
The aortic valve is in the left ventricle. When the heart muscle contracts (or beats), it is pumping blood out of the heart. ... The right side collects oxygen-poor blood from the body then pumps it to the lungs where it can pick up oxygen and release carbon dioxide.
The type of volcano that is pictured is Shield volcano. That is option A.
<h3>What is volcano?</h3>
Volcano can be defined as the eruption of the gases, lava and ash through an opening from the earth crust.
There are various types of volcano an example of which is the Shield volcano.
The shield volcano is different from other volcanoes because they :
- flow from a central summit vent, and
- flow pours out in all directions.
Learn more about volcanoes here:
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Answer:
d.organisms from the past
Explanation:
Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet's history. They can also help scientists reconstruct the evolutionary histories of present-day species.
Answer:
The question lacks options, the options are:
A. moisture content of seed must be at least 9%
B. Moisture content of the seed must be less than 9%
C. certain enzymes in the seed are activated
D. temperature must be above 80 degrees
E. temperature must be below 80 degrees
The answer is A
Explanation:
Germination is practically the very first step of every seed-producing plant. It is the process whereby seeds sprout or begin to grow. Germination requires certain conditions to be met in order to occur. This conditions include presence of moisture in the soil etc.
The water is absorbed by the seed helps to soften the seed coat, which protects the seed from damage. The seed coat ruptures, causing the emergence of growth structures from the seed. In general, seeds need water to activate their dormant physiology. Hence, the moisture content of the seed must not be lower than 9%.
