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igor_vitrenko [27]
3 years ago
14

Variety in species exists because of___.

Biology
1 answer:
amid [387]3 years ago
5 0
Its D. Sexual reproduction
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True or False. Meiosis produces 4 haploid cells so they can undergo fertilization to become diploid?
photoshop1234 [79]

Answer:

True

Explanation:

Meiosis was previously known as reduction/division. Meiosis I lowers ploidy from 2n to n (reduction), whereas Meiosis II divides the remaining chromosomes in a mitosis-like process (division)

5 0
2 years ago
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Eukaryotic cells. Classify each statement according to whether it occurs in eukaryotic cells, prokaryotic cells, or both.
frutty [35]

Answer:

<u>Both</u>:

  • The start codon is often AUG

<u>Eukaryotic cell only:</u>

  • The larger subunit of the ribosome is 60s.
  • The ribosomes initially binds the 5' end of mRNA.

<u>Prokaryotic cell only</u>:

  • The ribosome is 70s
  • Translation occurs in the cytoplasm
  • There are multiple ribosome binding site

Explanation:

  • AUG is the common start codon for both eukaryotic as well prokaryotic cells. In eukaryotic cell, it codes for methionine . While in prokaryotic cell, it codes for formyl methionine.
  • In prokaryotic cell, ribosomes are found in cytoplasm, hence the translation occurs in cytoplasm.
  • Eukaryotic ribosome consists of two subunits; 40s and 60s(larger subunit)
  • Prokaryotic ribosomes have 70s ribososme, which consists of 50s and 20s subuints
  • in eukaryotic cell, 40s ribosome initially binds to the cap at the 5' end of mRNA.
  • Bacterial mRNA contain multiple ribosome binding sites.
8 0
3 years ago
The synthesis of nucleotides requires several amino acids. Sort each amino acid as a precursor in the synthesis of purines, pyri
Lapatulllka [165]

Answer:

Glycine is required for purines, aspartate for pyrimidines, glycine and aspartate for both purines and pyrimidines. The remaining amino acids are not required for the synthesis.

Explanation:

Nucleotides are the monomer for the synthesis of DNA and RNA. The two main class of nitrogenous bases are purines and pyrimidines. These nitrogenous bases require the amino acids as a precursor for their synthesis.

Glycine is the simplest amino acid and required for the synthesis of purines. Aspartate is required for the synthesis of pyrimidines. Glutamine and aspartate are required for the synthesis of both purines and pyrimidines. Lysine, leucine, alanine, histidine, methionine, tryptophan and alanine are not used as a precursor for the nucleotides.

4 0
3 years ago
Which of the following best explains how introducing an invasive plant species to an ecosystem would affect the ecosystem over a
Nataliya [291]
It could possibly harm other plants and if those plants become less and are a good source for animals, the animals would most likely die
4 0
3 years ago
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ATP synthase is powered or driven by ______ flowing through it, in order to make ATP molecules.
Andre45 [30]

Answer:

B

Explanation:

8 0
3 years ago
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