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OLga [1]
3 years ago
8

Down syndrome is the result of an extra chromosome 21 in a gamete. What caused this to happen?

Biology
1 answer:
Natasha2012 [34]3 years ago
8 0
No disjunction is the answer
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A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the followin
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Answer:

Option (B) is the correct answer of the following question.

Explanation:

Collagens are a family of enzymes that perpetuate and protect many of the body's tissues, with the exception of connective tissue, femur, fibula, pigmentation, and the caucasian eye (optic disc). It would be the best choice on which to base the phylogeny.

  • The first and most concentrated substance in the body is the collagen genes.
  • It is a large, indigestible cellular muscle which maintains organisms and gives internal cells a texture.
  • Collagen is also an essential part of the crisscrossing membrane neurons.

Other options are incorrect because they are not related to the given scenario.

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3 years ago
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Josiah says this is a phylogenetic tree of the dinosaurs. Maleek says it is a cladogram of the dinosaurs. Who is correct?
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C. Both are correct,

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the most likely cause of sinkholes in areas like Florida and Kentucky is (A) the water table being so close to the Earth's surfa
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4 0
3 years ago
Which of the following is most consistent with the modern theory of evolution​
Alecsey [184]

The correct answer is Parents pass their physical traits to their offspring; those offspring with traits that help them survive in their environment are able to reproduce.

Explanation:

The modern theory of evolution explains the mechanisms that make organisms change. One of the main ideas this theory proposes is that organisms with traits that help them survive or reproduce have higher chances to pass their genes and traits to new generations. This mechanism makes certain traits to be favored and contributes to the evolution of organisms because after multiple generations certain traits will prevail while others will be eliminated.

Moreover, this theory specifies genes in an organism are not acquired or modified during its life but these are the results of the traits passed to the organism by its parents and evolution occurs only after a long time or multiple generations. According to this, the first option is the correct one.

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Which of the following is found in both an animal cell and a plant cell? 1. Lysosome 2. Cell membrane 3. Chloroplast 4. Cell wal
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The answer would be 1.lysosome

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