A scientist uses materials in her lab to separate DNA fragments by size. What process is she using?

Answers

Answer 1

Answer:

Gel electrophoresis is the technique she is using

Explanation:

Answer 2

Answer:

I may be wrong

Explanation:

it is le


Related Questions

Vhich type of scientific statement is defined
niversal because it has
as a statement of fact that is
always been observed to be true?
generally accepted to be true and
theory
probability
law
hypothesis

Answers

The answer is a law

Which of the following is not a reason that nonnative species are reared outside their native ecosystems? a. they are commercially important. b. they are used to replace native species. c. they are used for restocking programs. d. none of the above please select the best answer from the choices provided a b c d

Answers

Since invasive species are in a new environment, free from natural predators, parasites, or competitors, they often develop large population sizes very rapidly. These high populations can out-compete, displace or kill native species or can reduce wildlife food and habitat.

It would be D. Have a nice day!

List three biological activities that require energy

Answers

Movement, breathing, reproduction.

Write down the fundamental units of given derived units :
Newton and Joule​

Answers

Answer:

Newton: Kilogram and Metre squared

Joule:

Explanation:

One newton is therefore the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.

He made several statements about the tree. which statement is not true? the leopard is more closely related to the jaguar than to the snow leopard. the leopard is more closely related to the tiger than to the clouded leopard. the leopard is more closely related to the snow leopard than to the clouded leopard. the leopard is more closely related to the tiger than to the snow leopard.

Answers

Answer:

I'm certain it's the leopard is more closely related to the tiger than to the snow leopard.

Explanation:

Snow leopards are the organism more closely related to leopards than are clouded leopards.

What is a snow leopard?

Snow leopards are also known as ounce. The scientific name of the snow leopard is Panthera uncia.

What are clouded leopards?

The scientific name of clouded leopard that are wild cat is Neofelis nebulosa.

Clouded leopards are a kind of wild cat. They belong to a separate genus Neofelis,

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After wolf reintroduction into Yellowstone National Park in 1995, it was observed that the growth of willows and aspens increased. Based on your understanding of trophic cascades, which is the most likely explanation for this observation

Answers

The growth of willows and aspens increased due to reduction of herbivorous animals such as deer in the park.

Why the growth of willows and aspens increased?

After wolf reintroduction into Yellowstone National Park in 1995, it was observed that the growth of willows and aspens increased because the wolves control and reduce the population in the normal range.

So we can conclude that the growth of willows and aspens increased due to reduction of herbivorous animals such as deer in the park.

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Which type of wave is most affected by gravity from the Sun and the moon?

Answers

Answer:

Tidal wave

Explanation:


17. Eukaryotic cells sometimes cannot get oxygen to their cells and will therefore switch to which process?

Answers

Eukaryotic cells will switch to anaerobic respiration when there is not enough oxygen present. This process is often called fermentation and example include Lactic Acid Fermentation and Alcoholic Fermentation. Normally, they would use a type of aerobic respiration to produce ATP.

Monarch butterflies have very long tubular tongues. what is the most likely function of this adaptation? question 31 options: to defend the butterfly from predators to obtain liquid food from flowers to sense changes in the environment to dig holes in the soil for shelter

Answers

Answer:

Monarch butterflies have a very long tubular tongue so that they can obtain liquid food from flowers

Deaths associated with earthquakes in sloping areas results from what other natural disaster?

Answers

Answer:

landslides i belive

Explanation:

just a guess ig

Which of the cell types would secrete their product if the blood glucose level was rising, as during digestion of a meal?.

Answers

Insulin is an essential hormone for the control and regulation of the glucose metabolism in the body. When body intakes glucose it is rapidly consumed in the body cells in the presence of insulin. If insulin is non functional or deficient, then

Researchers notice that animal populations in a wildlife preserve have been decreasing. Which step should the researchers perform to obtain the most valid data about the decreasing animal population?

Answers

Answer:

Check the areas that need excessive maintenance

Explanation:

Answer: Throughout the year count and record animals throughout the preserve, as well as log animal deaths.

Explanation: C

Unlike the chordates, the other Deuterostome phyla of Echinoderms and Hemichordates are both comprised of ________. marine species tetrapod species detritivores terrestrial species

Answers

Deuterostome phyla of Echinoderm animals and Hemichordate animals are both comprised of marine species.

What are Deuterostomes?

Deuterostomes are organisms (i.e., animals) in which the anus appears first than the mouth in the embryos.

Embiologically, the development of Deuterostomes involves the formation of a structure called the blastopore.

Deuterostomes emerged after protostomes, which represents an evolutionary older lineage.

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what is natural selection not based on

Answers

Answer:

Natural selection is the process by which some organisms in a population survive and reproduce, while others do not, based on their bodies and behaviour. It is one of the processes by which species change from generation to generation, and is a crucial element of the theory of evolution.

Explanation:

14. What do all organisms have in common?
a. They are all genetically identical.
b. They are all prokaryotes.
c. They are all eukaryotes.
d. They all use DNA to pass on traits.

Answers

Answer:

a. they are all genetically identical

Genetic variation of individual chromosomes occurs during __________.

Answers

Answer:

prophase I

Explanation:

Telophase II: Nuclear membranes reform.

Prophase I: The chromosomes condense

Interphase: Replication of DNA in preparation

Prophase II: There are now 2 cells.

Karenia brevis, the dinoflagellate responsible for red tides, is ____________ , meaning it can undergo photosynthesis when conditions are right, or it can ingest bacteria, algae, and animal waste if additional nitrogen is needed.

Answers

Mixotroph organisms are capable of obtaining energy from the environment by combining autotrophic and heterotrophic mechanisms. Karenia brevis is mixotroph.

What is mixotrophy?

Mixotrophy is a nutritional strategy used by some organisms that combine autotrophy and heterotrophy to obtain energy. It is widely observed in aquatic environments and especially among phytoplanktonic flagellated algae.

The development of mixotrophy depends on the environment in which the organism lives, its limiting conditions, and resources availability.

This strategy is used in aquatic environments in which light and nutrients availability is scarce. So organisms can change from being autotrophs to heterotrophs, and vice-versa, according to the environmental pressures.

Karenia brevis, the dinoflagellate responsible for red tides, is _mixotroph_ , meaning it can undergo photosynthesis when conditions are right, or it can ingest bacteria, algae, and animal waste if additional nitrogen is needed.

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Which equation is correct according to ohm’s law? r = vi v = i over r. r = i over v. v = ir

Answers

The equation which is correct according to ohm’s law is v = ir which is denoted as option D.

What is Ohm’s law?

This states that the voltage across a conductor is directly proportional to the current flowing through it.

This is deduced as V ∝I where v is voltage and I is current.

V = IR

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Answer:

D

Explanation:

Toxic waste leaking from a barrel buried deep underground would be considered which type of pollution?

point source pollution
non-point source pollution

Answers

nonpoint source pollution

if we eat raw leafy vegetables, would we be able to digest them? what about raw meat? give a reason for your answer

Answers

Answer:

no,we can not survive only on raw leafy vegetables because it contains cellulose, which is a type of carbohydrate that human are not able to digest due to absence of cellulose-digesting enzymes

An exception to the one gene–one enzyme hypothesis is __________

Answers

Answer: A

A mutation in a single gene can result in a defective protein.

Explanation:

Hope this helped! Please give branliest.

What happens after mRNA
leaves the nucleus?

Answers

Answer: It goes to the ribosome for translation to occur. The ribosome is located in the cytoplasm.

Which of the male accessory glands encircles the urethra?.

Answers

The Male Accessory Gland That Encircles The Urethra Is The “Prostate” Gland.

What specific DNA feature of the sickle cell mutation allowed us to distinguish between the HbA and HbS alleles

Answers

The specific DNA feature of the sickle cell mutation that allowed us to distinguish between HbA and HbS alleles is a single amino acid.

What is sickle cell anemia?

Sickle cell anemia is a disease in which the blood cells become sickle shaped. The disease is genetic.

The genes responsible for sickle cell anemia is HbS allele. HbA allele is responsible for normal cells.

Thus, the specific DNA feature is a single amino acid.

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Which is the least likely reason that pigs have been chosen as donors for humans in the process of xenotransplantation? pigs are free of known diseases. pigs are cost-effective to raise. pigs have the same dna as humans. pigs are quick breeding.

Answers

The least likely reason that pigs have been as donors for humans in the process of xenotransplantation is pigs are of known diseases. It is any procedure contains the transplantation.

What is an example of xenotransplantation?

Xenotransplantation products include those from transgenic or nontransgenic not human , animals and composite products that contain xenotransplantation products in combination with drugs or devices.

Thus, option, "A" is correct.

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Answer:

ITS NOT OPTION A!!

Explanation:

Match each vocabulary word with its definition.
1. nucleus
A. the process of burning in the presence of oxygen
2. solar energy
B. a nucleus surrounded by electrons
3. combustion
C. a process that splits the atom
4. atom central
D. part of an atom
5. fission
E. capacity for doing work
6. photosynthesis
F. process that plants produce sugar
7. energy
G. energy from the sun

Answers

Answer:

1D  2G  3A  4B  5C  6F  7E

Explanation:

Im sorry if this is wrong. I tried :')

Which phrase accurately describes the frog in this food chain?

Answers

Answer:

Energy and Materials

Explanation:

Which is not a meninx of the nervous system? select one:

a. Subarachnoid space

b. Dura mater

c. Pia mater

d. Arachnoid?

Answers

The answer to that my friend is letter A ;)

The energy that gets to the top-level consumers originally comes from
A.the Sun.
B.the water.
C.the producers.
D.the decomposers.

Answers

The energy that gets to the top-level consumers originally comes from

the Sun.

How does energy from the sun get to a top level consumer?

Plants use energy from the sun to convert water and carbon dioxide into usable sugars, a process called photosynthesis.

Those plants may then be eaten by bugs, who are eaten by animals, who are then eaten by larger animals.

Thus, option "A" is correct, the sun.

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Which invention from the 17th century allowed for the development of modern cell theory

Answers

Answer:

The light microscope.

Explanation:

The light microscope allowed scientists to view actual cells for the first time.Specifically Robert Hooke

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