In one or two sentences, summarize the technique of gel electrophoresis.

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Answer 1

Answer: Gel Electrophoresis is the technique for sorting DNA molecules based on their number of base pairs by running a current through the gel. The sample travels opposite of the direction of the electrical charge since DNA is negatively charged. Using a certain primer you can identify the BP of the sample.

Answer 2

Answer: its the seperation of different lengths in a sample by using dna is negative charged

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In the five-kingdom classification system, all prokaryotes belong to the kingdom Monera. Which of the following best explains a reason why prokaryotes were separated into different domains, Eubacteria and Archaea?
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In humans tongue rolling is dominant to the inability to tongue roll. If a heterozygous tongue roller and a non-tongue roller have a child, what are the chances the child will be a non-tongue roller? A. 0 B. 0.25 C. 0.5 D. 0.75

Answers

Answer:

The chances of a child being non - tongue roller is $0.5\n$

Explanation:

Let the allele for dominant "tongue rolling trait" be represented by "T"

The allele for recessive "non-tongue rolling trait" be represented by "t"

The genotype of a heterozygous tongue rolling parent will be "Tt"

The genotype of a homozygous non- tongue rolling parent will be "tt"

If a cross is carried out between these two individuals , the offspring produced are as shown in the punnet square below-

T t

t Tt tt

So the number of offsrpings which are non- tongue roller are two in numbers represented by "tt"

So the chances that a child will be a non-tongue roller are

$(2)/(4) \n= 0.5\n$

Where , "4" represents the total number of offsprings produced

In humans, tongue rolling is dominant to the inability to tongue roll. The chances a child will be a non-tongue roller is C. 0.5.

What is homeostasis? an organism that obtains energy from the sun
an organism that obtains energy from another organism
maintaining stability in an organism's internal environment
a process that produces an exact copy of a parent

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homeostasis is maintaining stability in an organisms internal environment

Suppose scientists could compare the DNA of modern humans from around the world with the DNA of Homo erectus populations from the humans’ native homelands. If DNA samples from each modern human were found to be most similar to the Homo erectus DNA from their homeland, that finding would__________________. a. support the multiregional model.. b. support the out-of-Africa model.. c. support both the multiregional model and the out-of-Africa model.. d. disprove both the multiregional model and the out-of-Africa model.

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A. Support the multiregional theory as it would suggest that the evolution from homo erectus had happened naturally across the globe.

Answer: The correct answer for the blank is-

a. support the multiregional model.

Multiregional model is a scientific model that provides explanataion of pattern of evolution of modern humans. It is an alternative explanation of Out of Africa model.

According to this model, modern humans that are present around the world (that in various regions or multiregions of the world) show similarity to the Homo erectus found in Africa.

In other words, species of human beings first originated in Africa as Homo erectus, which then underwent subsequent human evolution upon dispersing in various regions around the world. These species include all archaic forms of human like Homo erectus, Neanderthals, and evolved worldwide as Homo sapiens ( modern human forms).

Thus, option a) is the right answer.

Wild rice grows in flooded fields. How are these supplied with water? A. It is pumped in from the ocean B. It flows down from the high Sierra mountains C. The area has heavy rainfall D. It is pumped from nearby lakes

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The logical answer should be C.

Cells function together to form tissues. The four main types of tissues in animals are

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epithelial, connective, muscular and nervous

A cell phone manufacturing company wants to display the average sales of their new phone model for a particular month across six countries. Which method of data representation would be ideal for this?

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The ideal data representation to display average sales of product per month across six countries is BAR GRAPH, because it's easy to compare sets of data between different group at a glance. they are effective in presenting trends or changes over time and the relationship of the data between the x and y axes is easy to see.

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When gametes combine to form a zygote, the chromosomes number of the zygote is now referred to asa. diploid.b. haploid.c. monoploid.d. polyploid.

The vascular tissue that transports water and dissolved nutrients from the roots up through the plant is calledA. phloem. B. xylem. C. transport tissue. D. fibrous tissue.

Industrial and automobile emissions contribute to acid rain. True or false

What is an effect of genetic drift on a gene pool?