i need help answering these questions

Answer:

DNA is negatively charged, therefore, when an electric current is applied to the gel, DNA will migrate towards the positively charged electrode. Shorter strands of DNA move more quickly through the gel than longer strands resulting in the fragments being arranged in order of size.

Explanation: :3 hope this helps

Answer:

cells can control the rates of reactions involving these enzymes by regulating the movement of substrate molecules through the membrane. organisms may use hormones to carry messages from one part of the organism to another.

Explanation:

i hope that helps!

The center of the atom is called the nucleus. The correct option is B.

The nucleus is the central region of an atom that contains most of its mass.

It is composed of protons and neutrons, which are collectively known as nucleons.

Protons have a positive charge, while neutrons have no charge. Together, protons and neutrons form the nucleus and are responsible for the stability of the atom. Surrounding the nucleus are electrons, which have a negative charge and orbit the nucleus in various energy levels or electron shells. The nucleus is highly dense and compact compared to the electron cloud surrounding it.

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Answer:

Freezing temperatures that normally limit the population in the cooler climate are lacking in the tropical hardwood hammock.

Explanation:

The tropical hardwood hammocks are habitats that act as small ecosystems markedly different from the surrounding environment, and they may be seriously threatened by introduced plant species. In Florida, exotic plants have been introduced into the tropical hardwood hammock habitat, reaching to about 50% of the flora in some areas. The mature hammock of these habitats can generate a shade that maintains a temperature of several degrees cooler compared to their neighboring habitats, and thereby promoting invasion by exotic species.

Answer:

i believe the answer is A or D

Explain:

i dont know which one it is though :(

Answer:  the answer for your question is muscle cells

Explanation:

Answer:

Epithelial cells and red blood cells

Explanation:

Answer:

she became the first presidents wife to advocate actively for legislation

Answer:

Your skin blisters, and a clear liquid fills the bubble

Explanation:

Answer:The number of protons is equal to the atomic number of the element. For this element having 6 protons makes the atomic number 6 and makes the element Carbon. For this element 6 protons and 6 neutrons combine to make an atomic mass of 12 amus.

Explanation:

Answer:

the atomic number is 6 but the mass is 12

Explanation:

Answer:

Form hypothesis: Where do you think trees get the nutrients they need to grow?

I think the trees get the nutrients from the soil and sunlight

Predict: Based on your hypothesis, how will the tree population change if ALL other organisms (deer, bears, and mushrooms) are removed from the forest?

I think they will increase dramatically because there is nothing affecting them badly.

Analyze: Remove ALL organisms except trees. Click Advance year a few times and select the DATA tab. Was your prediction correct? Explain what you found.

Yes my hypothesis was correct without the other organisms affecting the trees growth the tree population increased.

Draw conclusions: Substances that contain carbon and are produced by living things are called organic. Examples of organic materials are sugar, blood, protein, and fat. Other materials, like water, carbon dioxide, oxygen, and ammonia, are called inorganic.Some living things, called producers, can produce the organic materials they need (like food) from inorganic matter. All other organisms are consumers; they consume organic matter since they cannot make it themselves.

Do your results show you that trees are producers or consumers? Explain.

Trees are producers because they make it by using the sun's light.

Analyze: Click the FOREST tab. Click the plus (+) button for mushrooms several times. Click Advance year a few times. Select the DATA tab. How did adding mushrooms affect trees?

adding the mushrooms didn’t affect the trees.

Extend: The mushrooms thrived without hurting trees. How could this happen? Try for two possible explanations. Write your ideas in the space below.

The mushrooms are decomposers; they thrive off of dead things including the trees so they  do not harm the trees at all.

Explanation:

The trees in the forest controls the flow of water on the land.

When heavy rainfall occurs the trees help in trapping the water in the soil which reduces the chances of flood. These trees also provide habitat as well as food for living organisms that lives in the forests.

The trees get the nutrients they need to grow from the soil with the help of their roots. Decomposers present in the soil feed on dead bodies which turn into nitrogenous substances that is used by the trees for making amino acids.

The tree population increases if all other organisms such deer,  bears, and mushrooms are removed from the forest because these organisms feed on the trees so increase occur in the tree population.

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Answer:

That's True

Explanation: Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses. :)

Answer:

4. Low blood sodium concentration

5. Net movement of free water into the matrix

6. Increased matrix pressure

7. Abnormal neuron firing rate

8. Seizures

Explanation:

Seizures are defined as the common complication of drug intoxication.

As per the clinical observations for Clark , normal blood and matrix sodium concentration lose sodium ions due to diarrhea. As given too much water causes sodium levels to decrease. Due to lower sodium concentration, the free water move into the matrix and increased matrix pressure. This pressure causes the abnormal neuron firing rate to increase which causes seizures.

Hence, the correct order is:

4. Low blood sodium concentration

5. Net movement of free water into the matrix

6. Increased matrix pressure

7. Abnormal neuron firing rate

8. Seizures

Answer:

Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. They're needed for vital processes like the building of proteins and synthesis of hormones and neurotransmitters

Explanation:

Lion and cheetah populations compete for the food source of zebras, and lions outcompete cheetah.

Limiting factors are those factors in the ecosystem which can limit the growth of population of a species in an ecosystem. Predation and competition are two limiting factors in the ecosystem that can decrease or extinct the population of a species. Predation is a limiting factor in which predatory organisms are dependent upon a prey organisms. This is natures way of limiting the surplus growth of prey population and to maintain a balance in ecological community. Competition is a limiting factor in which one or more same or different type of organisms compete for the same resource in an ecosystem. The one which is more competitive will derive those resources other than the one which is less competitive.

According to the given data, it is evident that the population decline in predator cheetah and lion populations because of decline in zebra population but the decline in cheetah population is more than that of lion. It explains the fact that lion is more competitive than cheetah in deriving the food which is already limited. Therefore, lion outcompete cheetah.

Answer:

Explanation:

-Responsiveness to the environment - The organisms can respond to objects in its environment

-Growth and change - The organism can develop, grow, change

-Ability to reproduce - The organism can reproduce on its own or with others from their species

-Have a metabolism and breathe

-Maintain homeostasis

-Being made of cells

-Passing traits onto offspring

Answer:

Three types of bonds hold atoms together within molecules: ionic, covalent, and polar covalent. ... Hydrogen bonds allow two molecules to link together temporarily. • Water molecules are made up of two hydrogen atoms and one oxygen atom, held together by polar covalent bonds.

Explanation:

Covalent bonds occur when two atoms—in this case oxygen and hydrogen—share electrons with each other. Thus, option A is correct.

A covalent bond is the exchange of electrons between atoms. This type of bond occurs between two atoms of the same element or elements that are close to each other in the periodic table.

Strong linkages—called covalent bonds—hold together the hydrogen and oxygen atoms of individual H₂O molecules.

Because oxygen and hydrogen attract the shared electrons unequally, each end of the V-shaped H2O molecule adopts a slightly different charge.

Therefore, covalent bonds formed by shared electrons of hydrogen and oxygen atoms of individual H₂O molecules. Thus, covalent bond allows the three atoms in a water molecule to stay together. Thus, option A is correct.

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Your question is incomplete, but most probably your full question was,

What allows the three atoms in a water molecule to stay together ?

A. Covalent bonds formed by shared electrons

B. Covalent bonds formed by electrons that transfer between atoms

C. Ionic bonds formed by electrons that transfer between atoms

D. Hydrogen bonds formed only by the electrons of the hydrogen atoms

Answer:

B & C

Explanation:

If you are using A pex, I believe these are the correct answers.

The reason why it is important for gametes to be haploid cells is because: when the sperm and the egg fuse together the living sex cells will have 46 chromosomes.

Gametes are also referred to as sex cells and they can be defined as the reproductive cells in a living organism.

Generally, the male reproductive cell is known as a sperm while the female reproductive cell is known as an egg.

Since gametes are reproductive cells or sex cells, they are typically made up of haploid set of chromosomes.

Basically, it is very important for gametes to be haploid cells so that when the sperm and the egg fuse together, the living sex cells will have a total of 46 chromosomes.

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Answer:

d probably not

Explanation:

Answer:

46.0684

Explanation:

Answer:

I'm sorry but I don't understand your question.

Answer:

C

Explanation:

Answer:

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Your answer would most likely be: C. It produces gametes that are needed for sexual reproduction.

I hope this helped you out a bit :)

Answer:

not 8.000

Explanation:

y

Answer:

80 years

Explanation:

edg 2020

Answer:

It contains mostof the mass.

Explanation:

I just took the assignment.

Answer:

The answer is A. Patients do not receive harmful or ineffective medication.

Explanation: Test

Answer:

The answer is A) Patients do not receive harmful or ineffective medication.

Explanation:

I got it right

The appropriate response will be Option D (weight).

The weight of such a specific individual or object, defined as kilograms or milligrams as well as tons, seems to be how hefty something is.

The other given options such as:

Such given choices aren't connected to the given scenario. Thus the above is the perfect answer.

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