The answer is endothermic.
Endothermic reactions are reactions that need energy to form a product.
Exothermic reactions are reactions that release energy.
Photosynthesis is a process in which energy of sunlight is used to convert carbon dioxide and water into glucose and oxygen. Hence, the energy of sunlight is needed for photosynthesis. So, photosynthesis is endothermic.
Answer:
2.5 mg
Explanation:
<em>The half-life of a substance is the time required for one half of the substance to decay. In order words, it is the time it will take for a substance to decay into half of its initial size.</em>
For a 20 mg element with a half-life of 30 which decays over a period of 90 years;
The first 30 years, 10 mg would have decayed, remaining 10 mg
The second 30 years, the remaining 10 mg would have decayed to 5 mg
The third 30 years, 5mg would have decayed to 2.5 mg.
Hence, in 90 years, 20 mg of the element would <u>remain only 2.5 mg.</u>
A species can become extinct when a force Kills every single organism of an animal species which means there are none left.
Hope this helps!
This can be demonstrated by using an acellular environment to observe the 32P label entering phosphatidylethanolamine (PE) molecules by direct exchange.
Phosphatidylethanolamine (PE) is a major lipid component of cellular membranes in a wide range of organisms.
A scientist proposed that the 32P label was entering PE molecules by direct exchange, this can be proved using acellular environment.
In acellular environment, there aren't any bacterial cells to synthesize new PE. So if the 32P is incorporated into the PE in the acellular environment that means the proposed idea in the question stem is correct.
If no 32P is incorporated into PE in the acellular environment, then that means proposed idea is not correct.
Disclaimer: The question is not completed.
A scientist proposed that the 32P label was entering PE molecules by direct exchange (swapping phosphate groups with those found in solution) and NOT through synthesis of new PE by bacterial cells. What experimental modification can show this is NOT the case?
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The main differences between hypothesis and theory are based on the amount of scientific evidence and the ability to make predictions about a given outcome.
<h3>What is a scientific theory?</h3>
A scientific theory is a well-sustained body of empirical evidence that allows us to make predictions associated with new observations of the real world.
Conversely, a hypothesis is a given explanation that must be tested in order to be confirmed (or rejected) by using the steps of the scientific method.
In conclusion, The main differences between hypothesis and theory are based on the amount of scientific evidence and the ability to make predictions about a given outcome.
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