Abiotic is the non living organisms and biotic is the living organisms.
Answer:
The hellbender, which is much larger than all other salamanders in its geographic range, employs an unusual means of respiration (which involves cutaneous gas exchange through capillaries found in its dorsoventral skin folds), and fills a particular niche—both as a predator and prey—in its ecosystem
Explanation:
Answer: a) genetic
b) environmental
Explanation:
Phenotype is a function of genotype and environment
P=G+E
Where P= phenotype
G=Genotype
E=Environment
The phenotype of an individual i.e what is seen or expressed is a product of the gene he or she carries and the environment they occupy.
Gene is the genetic makeup of an individual.
The Identical and fraternal twin are products of their gene and the environment such as uterine environment, parenting style they grow, Identical twins have 100% of identical genes while fraternal twin have 50% gene in common
Hence, the difference is a function of their genetic makeup and the environment they grow.
Culture and evolution can also be regarded as part of the environment.
Answer:
The molecule that is able to go back and correct an error in the DNA nucleotide sequence is DNA polymerase (option B).
Explanation:
DNA polymerase is not only the enzyme that contributes to the polymerization of a new DNA strand during the replication process, but it can also correct errors in synthesis, such as when a mismatched nucleotide is placed.
Once an error has been detected during synthesis, the DNA polymerase —acting as a 3'-5'- exonuclease— reverses the process, the direction of synthesis, to correct the error which in this case is the mismatched nucleotide.
The other options are not correct because:
<em> A. </em><u><em>DNA proofreadasa </em></u><em>does not exist.
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<em> C. </em><u><em>Helicase</em></u><em> breaks the hydrogen bridges that bind the nucleotides allowing the separation of the DNA strands. In some cases, it also acts as a DNA repairer
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<em> D. </em><u><em>DNA Primase</em></u><em> is responsible for the synthesis of primers.</em>
<span> gills, fins, and blood.
The three structures and physical entities that almost all fish have:
Gills
Fins
Blood
Almost all fish have gill slits because there is no other way they can breathe underwater without having gills.Fins are used to move around the water and blood delivers oxygen and nutrients.
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