What about the structure of DNA that allows it to copy itself?
A. DNA is not copied, it is only passed down through each generation.
B. It is double-stranded, so each side serves as a template for a new strand.
C. It has enzymes built into the helix that makes a copy when needed.
D. It is held together mostly by hydrogen bonds, which are easy to open for replication.

Answers

Answer 1
the answer is B, DNA can replicate itself because of the way its double strands relate to one another.

Related Questions


Define taxonomic hierarchy....​

Answers

taxonomic rank is the relative level of a group of organism

Answer:

In biological classification, taxonomic rank is the relative level of a group of organisms in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, order, class, phylum, kingdom, domain, etc

Explanation:

What is taxonomic hierarchy?

“Taxonomic hierarchy is the process of arranging various organisms into successive levels of the biological classification either in a decreasing or an increasing order from kingdom to species and vice versa.” Each of this level of the hierarchy is called the taxonomic category or rank.

The optic nerves pass through the ----- of the ------- bone.

Answers

Answer:

sphenoid bone

Explanation:

Extracranial. The optic nerve is formed by the convergence of axons from the retinal ganglion cells. These cells in turn receive impulses from the photoreceptors of the eye (the rods and cones). After its formation, the nerve leaves the bony orbit via the optic canal, a passageway through the sphenoid bone.

Your hand pop up after touching a hot stovetop. Which two organs systems are most responsible for your reaction?
A. nervous and respiratory
B. immune and muscular
C. nervous and muscular
D. circulatory and muscular

Answers

Answer:

nervous and muscular

nervous and muscular

URGENTTT!!
how insulin taken by breathing it in enters the blood?

Answers

Answer:

well when you breathe in the insulin it travels to your lung and is absorbed by the alveoli where it is dissolved and is transffered to the capillaries

Explanation:

Proteins are one of the four main
types of
biomolecules
O living
O complex

Answers

I would have to go with O complex.

describe the human population growth curve over the past 10,000 years, and identify the type of population growth curve it represents


p.s I will give brainless

Answers

Explanation:

Global human population growth is around 75 million annually, or 1.1% per year. The global population has grown from 1 billion in 1800 to 7 billion in 2012.

Although the direst consequences of human population growth have not yet been realized, exponential growth cannot continue indefinitely.

In the late 1970s, China’s “one-child” policy tried to control population growth, but restrictions were relaxed in the early 2000s.

2. Seema suffered a severe muscle tear while playing. Which food nutrient would help her recover faster

Answers

Answer:

Protein.

Hope it helps you.....

Em algumas células encontramos organelas denominadas cloroplastos, que são responsáveis pelo processo de fotossíntese. Essas organelas são encontradas em:

A) células bacterianas
B) células vegetais
C) células procariotas
D) células animais

Answers

Answer:B celulas vegetais

Explanation:

Os cloroplastos são organelas que ocorrem apenas nas células de vegetais e algas e são ricas em clorofila, um pigmento de coloração verde. Elas estão relacionadas com o processo de fotossíntese e, nas plantas, são encontradas principalmente nas folhas.

Help me plz
What is an everyday problem you could use the scientific method to solve? Include what steps of the method would look like for this problem.

Answers

Answer:

observation : a toaster doesn't work

question : is something wrong with the electrical outlet

hypothesis : something is wrong with the outlet my coffee maker also won't work and plug into it

experiment : I plug my coffee maker into the outlet

result : a coffee maker works

2nd result : my toaster is broken

In what organelle do the Kreb's cycle and the electron transport chain take place?
(1 point)
0. chloroplast
O mitochondria
O cytoplasm
o nucleus

Answers

Answer:

mitochondria

Explanation:

-The aerobic phases of cellular respiration in eukaryotes occur within organelles called mitochondria. These aerobic phases are the Krebs Cycle and the electron transport chain.

The Kreb's cycle and the electron transport chain take place in the MITOCHONDRIA.

Cellular respiration is an aerobic process, i.e., a metabolic process that requires oxygen (O2) by which energy from foods is used to synthesize ATP, carbon dioxide (CO2), and water (H2O).

The three stages of cellular respiration are glycolysis, Kreb's cycle (also known as the citric acid cycle), and the electron transport chain.

Glycolysis is an anaerobic pathway (i.e., does not require O2) and occurs in the cytoplasm.

The Kreb's cycle and the electron transport chain (ETC) are both aerobic processes that occur in the intern membrane of the mitochondria.

In conclusion, Kreb's cycle and the electron transport chain occur in the mitochondria.

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Hello i need help with this it’s just short (The subject is science and Im sorry if i got the subject wrong from the above) Thank you in advance <3

1. Forest ecosystems provide all of the following functions EXCEPT;

a. producing oxygen
b. controlling soil erosion
c. removing carbon from the atmosphere
d. lowering the biodiversity of the plant

2. Extinction is a natural process that occurs when the last member of a species does. Which of the following correctly arranges the mass extinction events from earliest to latest?

a. Cretaceous-Tertiary, Ordovician-Silurian, Late Devonian, Permian-Triassic, Triassic-Jurassic

b. Late Devonian, Cretaceous-Tertiary, Ordovician-Silurian, Permian-Triassic, Triassic-Jurassic

c. Ordovician-Silurian, Late Devonian, Permian-Triassic, Triassic-Jurassic, Cretaceous-Tertiary

d. Ordovician-Silurian, Permian-Triassic, Triassic-Jurassic, Late Devonian, Cretaceous-Tertiary

3. Which contributes the most biodiversity loss?

a. habitat destruction b. pollution
c. invasive species d. population growth

4. Extinction can be caused by a Natural Phenomenon such as storm, flash floods, or Anthropogenic (Human made). Which of the following is believed to be the major and most impactful anthropogenic cause of extinction?

a. habitat destruction b. overpopulation
c. overexploitation d. pollution

5. Which of the following is not a benefit that tress can provide?

a. They can trap sediments and runoffs that help improve water quality.
b. They prevent the excessive warming of the planet by sequestering Carbon dioxide.
c. They serve as filters that rid the air of harmful pollutants and toxic gases.
d. None of the above.

Answers

Answer:

1. Lowering Biodiversity of the plant

2. I think it is B

3. Habitat Destruction

5. None of the Above

Explanation:

Answer:

1. d

2.c

3.a

4.a

5.d

Explanation:

1. Forests ecosystem have high biodiversity

3.Habitat loss from exploitation of resources, agricultural conversion, and urbanization is the largest factor contributing to the loss of biodiversity. The consequent fragmentation of habitat results in small isolated patches of land that cannot maintain populations of species into the future.

4.It is currently the biggest cause of current extinctions. Deforestation has killed off more species than we can count.

5. Im not sure.

   It may be ans c. As Trees absorb  toxic chemicals through their stomata, or 'pores', effectively filtering chemicals from the air.

A theory Group of answer choices is always true. may be revised or replaced. is a problem to be solved.

Answers

Answer:

may be revised or replaced

Explanation:

theories are an explanation that is based on current knowledge and may be changed after new discoveries

To make a guess based on what you know or think

Answers

Explanation:

An inference is an educated guess. We learn about some things by experiencing them first-hand, but we gain other knowledge by inference — the process of inferring things based on what is already known.


4. Which of the following is an important characteristic of a scientific theory?
a, proven by more than one scientist
b. unchanged by new evidence
c. accepted by the public
d. supported by much evidence

Answers

d) supported by much evidence

As temperature rises from 25 degrees to 60 degrees, the material heat and its kinetic energy as the material goes through vaporization to become a gas.

1. absorbs, increases

2. releases, does not change

3. multiplies its, is divided

4. remains the same, decreases

Answers

Answer:

1

Explanation:

the material absords heat ( so the temperature increase or the heat can be use to increase kinetic energy)

increase its kinetic energy

Choose something about that a scientist may want to learn about a newly discovered species of dinosaurs

Answers

Answer:

A scientist might want to know their DNA

___________ neurons carry signals from sensory nerves to the Central Nervous System.

Answers

Afferent neurons.

What is it : Afferent neurons are sensory nerves
These are sensory neurons carrying nerve impulses from sensory stimuli toward the central nervous system and brain. Afferent neurons carry signals to the brain and spinal cord as sensory data.

Which statement does not apply to the human egg

Cannot move on its own

produced at one at a time

contains enzymes to break down cell walls

contain’s food stores

Answers

Answer:

produced at one at a time.

Explanation:

human egg are not produced only at one time.

How is WHAM related to Nucleic Acids?

Answers

Answer:

Nucleic acid is an important class of macromolecules found in all cells and viruses. ... Deoxyribonucleic acid (DNA) encodes the information the cell needs to make proteins. A related type of nucleic acid, called ribonucleic acid (RNA), comes in different molecular forms that participate in protein synthesis.

Explanation:

A DNA segment is changed from AATTAG to AAATAG. What type of mutation is this and what is its effect on the genetic variation of a population?

A.
The mutation is a substitution which causes a decrease in the genetic variation of a population.

B.
The mutation is an insertion which causes a decrease in the genetic variation of a population.

C.
The mutation is an insertion which causes an increase in the genetic variation of a population.

D.
The mutation is a substitution which causes an increase in genetic variation of a population.

Answers

The mutation from AATTAG to AAATAG is a substitution which causes an increase in genetic variation of a population.

MUTATION:

Mutation refers to any change in the nucleotide sequence of DNA molecule. Mutation can be of different types depending on how it occurs.

A substitution mutation is that in which one or more nucleotide base is replaced by another in the sequence.

In this question, an original sequence of DNA is given as AATTAG. It was mutated to AAATAG via the replacement of 'T' with 'A'. This means that it is a substitution mutation.

However, this mutation will cause an increase in the genetic variation i.e. difference in a population.

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During transformation,
a. a prokaryote is changed into a eukaryote.
b. a cell takes in DNA from outside the cell.
c. foreign RNA is inserted into a plasmid.
d. a clone is produced.

Answers

Answer:

b. a cell takes in DNA from outside the cell.

What is the function of a chloroplast? A. Gamete production B. Cellular respiration C. Fermentation D. Photosynthesis ​

Answers

D photosynthesis is the function of a chloroplast

Answer:

So i had these notes from a couple of days ago and I’d like to help u out

Explanation:

Photosynthesis

Carbon dioxide enters through the leaf which contains small pours called stomata. The carbon dioxide then enters the cells of the leaf.

Inside the cell carbon dioxide diffuses into the chloroplasts. Where photosynthesis takes place

Chloroplasts use energy from sunlight to transform carbon dioxide and water into sugar and oxygen.

The light reactions

Inside chloroplasts there are these flat membranous sacs called thylakoids.

Thylakoids are the place were light energy is converted into chemical energy in the first phase of photosynthesis the light reactions.

Photosystems

Photosystems are large complexes of proteins and chlorophyll (capture light energy)

Electron transport chain

This chain connects the two photosystems.

Electron carrier

These shuttle (transport that is mainly between 2 things going back and forth) electrons from one photosystem to another

Photosystem

One of the photosystems are used to absorb energy which then excites the electrons that then enter the electron transport chain. These electrons are replaced with electrons stripped from water creating oxygen as a byproduct.

The electrons on the chain

The energised electrons are flowing down the electron transport chain releasing energy that is used to pump hydrogen ions

Hydrogen ions

An atom or molecule that has a net electrical charge due to the loss of one loss or one gained electron.

The electrons on the chain

As the hydrogen ions get pumped out they are then absorbed into the thylakoids

In the photosystem on the right  light energy excites electrons and this time the electrons are captured by an electron carrier molecule also known as NADPH

The high concentration of hydrogen ions inside the thylakoid powers ATP synthase producing ATPS the light reactions in the thylakoid have produced two products, ATP and NADPH.

Those two products then power the production of sugar in the Calvin cycle

THE CALVIN CYCLE (C3 Cycle)

The Calvin cycle takes place outside the thylakoids in the stroma (the thick fluid of the chloroplast).

At the beginning of the cycle

carbon dioxide molecules combine with molecules called rubp the resulting molecules go through a series of reactions  powered by ATP and NADPH from the light reactions sugar molecules known as g3ps are produced.

G3ps

Most of the g3ps molecules are rearranged back into rubp’s that begin the calving cycle again.

The important product

Then some of the left over g3ps is the remaining g3p sugar, some g3ps are used to build glucose which can then combine into starch or even cellulose

Bits of left over g3ps are also able to break down by cellular respiration, which uses oxygen in the plants own mitochondria, this generates ATPS that can power other work of the plant.

The left overs

Excess oxygen diffuses out of the leaf through the pores while more carbon dioxide goes into the leaf pores.

Your welcome

Which best supports the part of the cell theory which states “the cell is the smallest unit of living things”?

Answers

Answer:

because it is the basic unit of life

evolutionary ideas of Lamarck and Darwin (research work)

Answers

Answer:

Lamarck's transmutation theory established the foundation of an evolutionary model introducing a new way to research in nature. Darwin's selection theory was proposed in 1859 to explain the origin of species within this epistemological process.

Explanation:

A child receives an x chromosome from its mother and a y chromosome from its father.What is true about this child?

Answers

they are male due to the XY chromosomes

There is cute I’m guess

por que un globo con aire se agranda al sol y se achica en la heladera

Answers

Answer: El globo congelado se contrajo porque la energía cinética promedio de las moléculas de gas en un globo disminuye cuando la temperatura disminuye. Esto hace que las moléculas se muevan más lentamente y tengan colisiones menos frecuentes y más débiles con la pared interior del globo, lo que hace que el globo se encoja un poco.

Explanation:

A skateboarder drops in off the top of one side of the half pipe shown below. She does not push off and starts from rest. She stands straight as she skates down one side and up the other. She expected to get to the top of other side but didn’t make it. The skateboarder recalled the law of conservation of energy from science and didn’t understand why she didn’t make it to the top of the other side.

Which of the following actions would help the skater reach the top of the other side of the half pipe?


Lubricate the wheels in order to reduce frictional force that is causing the skateboard to lose velocity and bend down while skating off the side and bottom of the half pipe.


Hold a weight in order to increase her mass and cause the skateboard to move with a greater velocity down the half pipe.


Sit on the skateboard in order to lower her center of mass and increase the potential energy of the skateboard.


Push off at the bottom of the half pipe in order to replace lost energy and add kinetic energy to the skateboard.

Answers

The actions that will help the skater reach the top of the other side of the half pipe is to lubricate the wheels in order to reduce frictional force that is causing the skateboard to lose velocity and bend down while skating off the side and bottom of the half pipe.

The law of conservation of energy from science states that energy can neither be created nor destroyed but can be transformed from one form to another.

The skateboarder couldn't make it to the top of one side of the half pipe because the kinetic energy that was generated was converted to heat energy through friction.

As the heat energy is lost to the surrounding environment, the skateboard loses velocity.

Bending down by the skateboarder will provide additional energy to make up for the lost energy.

Therefore, in order for the skateboarder to reach the top of the other side of the half pipe, she has to lubricate the wheels in order to reduce frictional force that is causing her to lose velocity and bend down while skating off the side and bottom of the half pipe.

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Answer:

Lubricate the wheels in order to reduce frictional force that is causing the skateboard to lose velocity and bend down while skating off the side and bottom of the half pipe.

Explanation:

Got the answer right on a quiz and reducing frictional force leads to many other contributing factors that makes the skateboarder reach the other side of the half pipe.

What if anything on Mars can be used as a potential energy source? How does this compare to the various energy sources found on Earth?

Answers

Answer:

http://large.stanford.edu/courses/2017/ph240/black1/

Explanation:

5. Identify Patterns To analyze the characteristics of life, why is it useful to identify
patterns at the level of molecules and cells?
NOTEBOOK

Answers

334333till cdftgj vnnnmm

What are all the steps in a descriptive investigation?

Answers

Explanation:

Make an observation about a phenomenon (qualitative and/or quantitative)

Ask a research question.

Hypothesize a possible answer for your question.

Create a procedure to test your hypothesis.

Identify what you are testing.

Identify your control group/experimental group.

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