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Gala2k [10]
4 years ago
6

Both insects and roundworms exhibit ______, whereas sponges, snails, and leeches do not. A. sexual reproduction B. sensory perce

ption C. calcium carbonate shells D. molting during growth
Biology
1 answer:
Irina-Kira [14]4 years ago
6 0
D- Molting during growth
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What happens if an atom gains 2 electrons to fill its valence shell
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B. It becomes more stable and will have a  -2 charge.
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Polydactyly is an inherited trait that results in extra fingers or toes. In the United States 0.1% of the population exhibits po
ANEK [815]

Answer:

c. The P allele is less frequent in the US than the p allele.

Explanation:

If people with the heterozygous genotype "Pp" present polydactyly, only people with the genotype "pp" will not present polydactyly. Since 99.9% of the population do not exhibit polydactyly, then it can be concluded that the "p" allele is much more frequent in the US than the "P" allele.

Therefore, the answer is:

c. The P allele is less frequent in the US than the p allele.

4 0
3 years ago
Correct answer gets brainliest.
Vladimir [108]

There are three domains:

the ARCHAEA, BACTERIA, and EUCARYA

oragnisms from ARCHAEA and BACTERIA have a prokaryotic cell structure, whereas organisms from the domain EUCARYA encompass cells wirh a nucleus confining the genetic material from the CYTOPLASM.

and all of this is the answer..good luck

7 0
3 years ago
Read 2 more answers
Amoeba Sisters Video Recap: DNA Replication
Sergio039 [100]

Before starting the explanation in the amoeba sister video, they explain what DNA replication is. We can say that DNA, which in eukaryotic cells is located in the nucleus, contains all the genetic information of a being and its duplication process is important for cell growth, reproduction and repair.

<h3 /><h3>What is DNA replication?</h3>

A DNA molecule is made up of two strands that complement each other. For example, if we have an F and an F' strand, in the replication process the strands separate and are used as templates for the formation of complementary strands. Thus, the nucleotide sequence of F determines the sequence of a new F' strand, and F' indicates the composition of a new F strand.

<h3>DNA replication process</h3>

In the video of the amoebas sisters it is briefly explained that..

  1. DNA replication occurs in the 5' → 3' direction and the strands are separated by the action of enzymes, which break the bonds between the nitrogenous bases and unwind the strands, opening the double helix.
  2. As DNA uncoiling takes place, other enzymes act to catalyze the synthesis of two new sequences using the parent strands as a template. Each strand created joins an original strand of DNA. Therefore, the process is classified as semi-conservative.
  3. DNA is a double helix molecule and for its duplication to occur, the first step is to unpack this structure by the action of the DNA helicase enzyme. The helicase recognizes the origin of replication and works by breaking the hydrogen bonds in the nitrogenous bases A-T and C-G. This process occurs at several points and forms "replication bubbles".
  4. As the bonds unravel, it's like a zipper opening, so this step gives rise to a Y-shaped structure called the replication fork, the starting point of duplication.
  5. The primase enzyme is responsible for synthesizing a portion of RNA, called a primer. In this step, several primers are generated and are joined to the chain to start DNA synthesis.
  6. The DNA polymerase enzyme is the replication enzyme responsible for extending the new strand by adding the bases (A, C, G and T). This step is directed from the 5' end, with a phosphate group, to the 3' end, with a hydroxyl group. This phase is called continuous replication.
  7. Among the primers attached to the original strand, several pieces of DNA are attached and are called Okazaki fragments. As the sections will need to be joined later, this phase is called delayed.
  8. The exonuclease enzyme is responsible for removing the primers from the original strands after the formation of continuous and discontinuous strands. To avoid sequencing errors, a review and, if necessary, a correction is performed by another exonuclease.
  9. The enzyme DNA ligase causes the DNA fragments to be joined and the DNA sequenced into two continuous strands.

thus, in a simple way, how DNA replication occurs in the video of the amoebas sisters.

learn more about DNA in brainly.com/question/264225?referrer=searchResults

5 0
3 years ago
Two characteristics of natural wines are that they have a maximum alcohol content of 14% and are ""sparkling"" wines. Apply your
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<h2>Alcoholic Fermentation</h2>

Explanation:

  • Two attributes of regular wines are that they have a most maximum alcohol content of 14% and are "sparkling" wines.
  • In natural wines, after the ethyl alcohol and are <em>"shimmering" wines. </em>
  • <em>In regular wines, after the ethyl liquor fixation arrives at 14%, the liquor murders the yeast cells, making aging stop. The bubble or shimmer in wines is the collection of CO2. </em>
  • Yeast keep on aging sugars until they either come up short on nourishment or the liquor content gets sufficiently high to slaughter them.
  • The  most wine yeasts, 14% is higher than they can tolerate. There are, be that as it may, yeasts that the merchants<em> guarantee can tolerate higher alcoholic rates.</em>
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