Explanation:
Why (for what reasons) is it believed that oxygen was not present when life formed on Earth? The life forms were anaerobic, and did not make oxygen. There is a lack of oxidized iron in rocks that are a few billion years old. Eventually oxygen from the oceans moved into the atmosphere, and iron could be oxidized.
Answer:
Explanation:
The sealed ballon filled with air has a constant pressure when introduced into the deep freezer.
Using the gas law relationships, once can easily understand the outcome of this set up.
Inside the freezer, the most apparent thing is that the balloon is subjected to a rapid decrease in temperature.
According to Charles law "At constant pressure, the volume of given mass of gas is directly proportional to its temperature".
Since the pressure in the balloon is likely retain, the lowering of the temperature will reduce the volume of the gas and cause the balloon to shrink. The gas particles will lose their kinetic energy and move with less vigor.
Earthquakes are caused by the constant movement of the tectonic plates because of the lava underneath it.
hope this helps
Answer:
Option B) they lack a nuclear membrane
Polysome formation in bacteria is able to occur because they lack a nuclear membrane
Explanation:
Since bacteria, like other Prokaryotes, lack a well-defined nucleus and nuclear membrane, its ribosomes are held together by ribonucleic acid (RNA) during protein synthesis, and are altogether referred to as polysome.
Temperature affects spermatogenesis, which functions best at body temperatures just a little lower than those.
<h3>Abstract:</h3>
To keep testicular temperatures below those of the body core, adequate thermoregulation is essential. The process of mammalian spermatogenesis and the resulting spermatozoa are negatively impacted by elevated testicular temperature. Therefore, sperm quality can be affected and the likelihood of infertility is increased by thermoregulatory dysfunction resulting in heat stress. This article reviews a variety of internal and external factors that may lead to testicular heat stress. We go into more detail on how heat stress affects the spermatogenesis process, the resulting epididymal spermatozoa, germ cells, and the alterations that result in the testis.
We also go over the chemical reactions of germ cells to heat exposure and potential processes, such as apoptosis, DNA damage, and autophagy, that could lead to heat-induced germ cell damage. Further explanation is provided for the intrinsic and extrinsic processes involved in the complex mechanism of germ cell death. These intricate apoptotic pathways ultimately result in the demise of germ cells.
Learn more about spermatogenesis here:
brainly.com/question/1594056
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