Answer:
D. phospholipid bilayer
Explanation:
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Cellular respiration and photosynthesis both have water and carbon dioxide in their reactions.
Answer/Explanation:
The DNA in all living organisms is made up of 4 bases, adenine, thymine, guanine, cytosine. The RNA replaces thymine with uracil, making 5 types of nucleotide. The number of nucleotide pairs in a genome can range from half a million up to 100,000 million - meaning there are an exponential number of combinations of these 4 bases.
Imagine an organism exists that has only 2 nucleotides (<u><em>this is over 200,000x smaller than even the smallest bacterial genome</em></u>). If we allow any nucleotide at each of the 2 positions, then we have 4x4 (4²) or 16 possible combinations of sequences. For a nucleotide length of 4, the total number of possible combinations are 4⁴ or 256.
Since we are dealing with many millions of nucleotides, there are essentially infinite combinations of nucleotides, giving rise to the variation that produces over 20 million organisms on the planet.
In metaphase 1 of meiosis , synapsed homologous chromosomes align independently of one another alone the metaphase plate .
Answer:
Any of the answers are correct. This question is completely opinionated (I chose no).
[If you limit your interpretation of the biological species concept to only what happens in nature, lions and tigers are separate species. In contrast, if you consider what is possible with human intervention, you could argue that lions and tigers are not separate species since they can be crossed to form fertile ligers.
The biological species concept is one of over 20 different species concepts that attempt to put nature into human-constructed categories. Most biologists would agree that the challenge of defining species has still not been elegantly solved.]
