What are Eukaryotes?
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In 1809, Lamarck developed one of the first theories of evolution called the
Which could result from a person who does not finish the prescribed amount of antibiotics for an infection?
A population of rabbits lives in a forest. The habitat features many small spaces for hiding. Over many generations, the average size of the rabbits gets smaller and smaller. What type of selection is this?
A graphic that shows the number of organisms in each trophic level of the ecosystem is called a(n)A.) population pyramid B.) population graph C.) number pyramid D.) number graph
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Final answer:
In cellular respiration, oxygen acts as the final electron acceptor in aerobic respiration, while organic or inorganic molecules can serve as electron acceptors in anaerobic respiration and fermentation.
Explanation:
The molecules that serve as electron acceptors in cellular respiration play a crucial role in the generation of ATP. In aerobic respiration, the final electron acceptor is an oxygen molecule (O₂), which allows for the production of ATP by transferring high-energy electrons from NADH or FADH₂ through the electron transport chain (ETC). When insufficient oxygen is present, organisms must employ alternative mechanisms such as fermentation or anaerobic cellular respiration, whereby organic or inorganic molecules other than oxygen act as the final electron acceptors to regenerate NAD⁺ from NADH, allowing processes like glycolysis to continue.
In the absence of oxygen, some microorganisms, like methanogens and sulfur bacteria, perform anaerobic respiration using inorganic molecules like carbon dioxide and sulfate to regenerate NAD⁺. This process is critical for enabling energy conversion in environments where oxygen is scarce.
Learn more about electron acceptors here:
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a. maintaing healthy soil and water
b. increased use of fertilizer
c. safe distribution of food
d. biodiversity
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a. maintaining healthy soil and water
This seems like an obvious option, since healthy soil is necessary to produce food. If a soil is not healthy, it will not have enough nutrients to produce plants.
b. increased use of fertilizer
Actually, the use of fertilizer is not necessary, as healthy soil will be enough to produce food. And increasing the use of fertilizer is even more not good, because it can be unhealthy and it can lead to the soil being infertile.
c. safe distribution of food
This is also very important. Imagine if you can produce healthy food, but you cannot deliver it safely to people and the food gets infected with bacteria on the way - then the whole effort is in vain!
d. biodiversity
This is actually very important, because if you have only one species, if this species is hit by a plague, you could loose all your crop! So you need to keep a variety of crops
b. False
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Answer: FALSE (just took the test)
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A sodium atom has a single electron in its outermost electron shell, the first and second shells again being full with two and eight electrons respectively. To remove this outer electron requires only the first ionization energy, which is +495.8 kJ per mole of sodium atoms, a small amount of energy. By contrast, the second electron resides in the deeper second electron shell, and the second ionization energy required for its removal is much larger: +4562.4 kJ per mole. Thus sodium will, in most cases, form a compound in which it has lost a single electron and have a full outer shell of eight electrons, or octet.
Answer : According to the octet rule, sodium wants to lose an electron.
Explanation :
The given element is sodium with atomic number 11 that means it has 11 electrons.
The electronic configuration of sodium will be,
From the electronic configuration, we see that one electron of sodium present in its outer energy level. Sodium can be lose one electron easily for the stable electronic configuration.
According to the octet rule, sodium has the tendency to lose one electron and form positive ion with the charge (+1).
Hence, according to the octet rule, sodium wants to lose an electron.
Type A Muscles Type B Muscles Type C Muscles
Striations Yes Yes No
Found in digestive and urinary system No No Yes
Found in musculoskeletal system Yes No No
Which type of muscle is Type B? Cite the evidence from the chart to support your answer.
A Type B are skeletal muscles, because only skeletal muscles have striations.
B Type B are cardiac muscles, because they are not found in any other part of the body.
C Type B are skeletal muscles, because they are not part of the digestive system.
D Type B are cardiac muscles, because they do not tire easily.
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Answer:
Option C
Hope it helps!!