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Luba_88 [7]
2 years ago
14

1. How did you revise your sequence from your initial idea ? Explain how you decided on the sequence. For the Natural Selection

activity
Biology
1 answer:
liberstina [14]2 years ago
8 0

Natural selection is the idea that  organisms that posses favorable traits that enable them to survive in their environment are the ones that live long enough to pass on these traits to their offspring.

<h3>What is natural selection?</h3>

The question is incomplete but I will try my best to explain the idea of natural selection.

The term natural selection refers to the idea put forward by Charles Darwin that organisms that posses favorable traits that enable them to survive in their environment are the ones that live long enough to pass on these traits to their offspring. This is also called the survival of the fittest.

Learn more about natural selection: brainly.com/question/2725702

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A nerve impulse from one neuron affects the activity of a neighboring neuron at a point of interaction called the:
tatyana61 [14]

Answer:

A nerve impulse from one neuron affects the activity of a neighboring neuron at a point of interaction called the: SYNAPSE

Explanation:

A NEURON(or nerve cell) has 3 parts:

1. The dendrites(multiple)

2. The axon

3. The cell body

A SYNAPSE is an area where the dendrites of one neuron communicates with the axon of another neuron.

At the synapse, nerve impulses are transmitted from one neuron to the other. This is possible through substances called NEUROTRANSMITTERS. There is no direct contact between the axon of one neuron and dendrites of another neuron.

4 0
3 years ago
Place the primers in the correct orientation and locations to amply this gene by pcr. if a primer does not belong in a particula
galina1969 [7]

DNA replication is the process of doubling a DNA double chain. In cells, DNA replication occurs before cell division. Prokaryotes continually replicate DNA. In eukaryotes, the timing of DNA replication is highly regulated, ie in the S phase of the cell cycle, before mitosis or meiosis I. The multiplication utilizes the DNA polymerase enzyme which helps form bonds between the nucleotides that make up the DNA polymer. The process of DNA replication can also be carried out in vitro in a process called a polymerase chain reaction (PCR).

<h2>Further Explanation </h2>

A slow strand (Lagging strand) is a DNA strand located on the opposite side of the leading strand on the replication fork. These strands are synthesized in segments called Okazaki fragments. In this string, primases form RNA primers. The DNA polymerase can thus use OH 3 'free groups in the RNA primer to synthesize DNA in the direction of 5' → 3 '. The primary RNA fragments are then removed (for example by RNase H and DNA Polymerase I) and new deoxyribonucleotides are added to fill the gaps that were previously occupied by RNA. DNA ligase then connects the Okazaki fragments so that the synthesis of lagging strands is complete.

Primers both on the steering strand and on the lagging strand will elongate with the help of Holoenzyme DNA polymerase III. This multisubunit complex is a dimer, half will work on the steering strand and the other half will work on lagging strands. Thus, the synthesis of the two strands will run at the same speed.

Each dimer part of the two strands consists of subunit a, which has the actual polymerase function, and subunit e, which has an editing function in the form of exonuclease 3'– 5 ’. In addition, there is a subunit b that attaches polymerase to DNA.

Once the primers in the remaining strand are removed by DNA polymerase III, they will be removed immediately and the gaps caused by the loss of the primer are filled with DNA polymerase I, which has 5 '- 3' polymerase activity, 5 '- 3' exonuclease, and editing 3 exonuclease '- 5'. Eksonuklease 5 '- 3' discard the primer, while the polymerase will fill the gap caused. Finally, the Okazaki fragments will be united by the DNA ligase enzyme. In vivo, the dimoenzyme DNA polymerase III and primosomes are believed to form large complexes called replisomes. With the replisom DNA synthesis will take place at 900 bp per second.

Learn more

DNA replication brainly.com/question/5932348

Details

Grade:  College

Subject:  Biology

keywords: DNA, RNA, replication.

4 0
3 years ago
Read 2 more answers
A molecule that has regions of partial positive and partial negative charge
nasty-shy [4]

Answer:

A) polar

Explanation:

Polar molecules contains  partial positive and partial negative charge as in all polar molecules two atoms have unequal sharing electron. Due to unequal sharing of electrons, one atom that attracts valence electrons strongly gains positive charge and other gain negative charge.

For example water, water is a polar molecule having partial negative and partial positive charge because the oxygen atom in water attracts electrons more strongly than the hydrogen atoms.

Hence, the correct answer is "A) polar".

7 0
3 years ago
Which molecules prevent cell membranes from dissolving in water?
sertanlavr [38]

Answer:

The "tail" of the molecule is made up of two fatty acids, which are hydrophobic and do not dissolve in water. Following the rule of "like dissolves like", the hydrophilic head of the phospholipid molecule dissolves readily in water.

Nonpolar Fatty Acids

I Hope this answers your question :)

5 0
3 years ago
A shark's skin is so abrasive that some ancient peoples used it as what?
jek_recluse [69]
To put it simply: Sandpaper
6 0
3 years ago
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