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A lunar eclipse happens when the Moon passes directly behind the Earth and into its shadow. This can only happen when the Sun, Earth, and Moon are aligned. Because of this, a lunar eclipse can only happen on the night of a full moon.
The moon gives off a reddish appearance during this time because the only light reaching the moon and reflected off of its surface is the light refracted by the Earth's atmosphere (the same reason a sunrise/sunset appears reddish).
A totally eclipsed full moon is also known as a Blood Moon because of it's colour
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Answer:
D) begins as a cell, comes from an organ, is part of a system
Explanation:
Here is how pollen is formed, in simpler words, it comes from sporogenic tissue, formed inside the male organ called the anther, and is part of the male reproductive system.
The formation of a pollen grain begins inside the male part of a flower called the anther, within specific tissue called sporogenic tissue. Here, the developing pollen receives nutrition and a coat of cellulose, which is a very strong plant protein. First, large pollen mother cells are produced, which eventually break into individual pollen grains through cell division. At this point, the pollen grain gets its outer coat, called the exine, which is made from another tough plant protein. The exine protects the delicate genetic material inside the pollen grain from water loss, and damage caused by UV radiation and other environmental causes. In some plants, the pollen grain also gets a sticky outer layer to help it adhere to the female part of another plant, called the stigma. The final step involves another cell division, which creates two cells within one pollen grain. After that, the pollen grains move to a drying-out phase, after which they take on their dusty appearance and are ready to go out into the world and fertilize ovules.
Answer:Frameshift mutations are likely to change more than one amino acid, infact a completely irrelevant protein with altered amino acid sequence is produced.
Explanation:
Frameshift mutation is due to addition or deletion of bases. From that point onwards the reading frame shifts, different set of codons read. Frameshift mutations are likely to change more than one amino acid, infact a completely irrelevant protein with altered amino acid sequence is produced.
Frame shift mutation can lead to thalassemia due to premature chain termination and run-on-polypeptude that are non-functional.