Which description best explains Watson and Crick's DNA model?

A. DNA is a single–stranded molecule that has nitrogenous bases toward its exterior.
B. DNA is a double helix made of two strands linked together with hydrogen bonds.
C. DNA is a double helix that contains nitrogenous bases toward its exterior.

Answers

Answer 1

Answer:

A . ..............,.................

Answer 2

Answer:

DNA is your saliva

Explanation:

IN YOUR CLASS


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True or False: The most common conditions of COPD are emphysema, which destroys air sacs, and chronic bronchitis, which causes airway inflammation.

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Answer:true

Explanation:

What are the reactants of
cell respiration?
(what is needed)

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Answer:

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

Explanation:

Answer:

Explanation:

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

which gland secretes hormones that control the pituitary gland

Answers

Answer:

the hypothalamus.

Explanation:

a sample of dna contains 10% guanine. what is the percentage of the remaining nitrogenous bases?

Answers

Answer:

10% 40% 40%

Cytosine 10%, Thymine 40% and Adenine 40%

If the sample of DNA contains 10% guanine, the percentage of remaining nitrogenous bases are cytosine 10%, adenine 40%, and thymine 40%.

What is a Nitrogenous base?

A nitrogenous base may be defined as the nitrogenous compounds that form an important part of the nucleotides which are known as the building blocks of nucleic acids like DNA or RNA.

According to the question,

The concentration of guanine in DNA = 10%.

According to Chargaff's rule, the amount of guanine is equal to the amount of cytosine. So, the concentration of cytosine is also 10%.

Now, the remaining amount of nitrogenous base = 100-20 = 80%. This 80% is divided into adenine and thymine 40% each.  

Therefore, the percentage of remaining nitrogenous bases are cytosine 10%, adenine 40%, and thymine 40%.

To learn more about Nitrogenous bases, refer to the link:

https://brainly.com/question/1380409

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How did Kepler develop his second law of motion?(1 point)

a He made accurate measurements of the positions of all the planets over many years.


b He used a telescope to carefully follow and time the orbital motion of Mars.


c He compared data of planetary motion at different times along orbits.


d He invented a telescope that was strong enough to view all planets of the solar system along their orbits.

Answers

Answer:

He found that the planets do not all move at the same speed.  (A)

Explanation:

Kepler develop his second law of motion by he made accurate measurements of the positions of all the planets over many years. So, the correct option is A.

What do you mean by Kepler's second law?

Kepler's second law states that a planet moves in its ellipse so that the line between it and the Sun placed at a focus sweeps out equal areas in equal times.

This discovery by Kepler gives the idea of the planetary motion of all planets. According to this law, the planets moved on a circular path around the sun, but the speed of revolution is different for each planet.

Therefore, Kepler develop his second law of motion by he made accurate measurements of the positions of all the planets over many years.

To learn more about Kepler's law, refer to the link:

https://brainly.com/question/4952322

what is found inside the nucleus and produces ribosomes

Answers

Answer:

Im pretty sure its the nucleolus.

Explanation:

It is the Nucleolus

Which of the scientist responsible for the cell theory would be most likely to write a book titled Cells Come from Cells?
Hooke
Schlieden
Virchow
Schwann

Answers

the answer is Virchow. hope it helped

Answer:

Virchow

Explanation:

Rudolf Virchow proposed that all cells come from pre-existing cells, so if anyone were to write a book that is titles Cells Come from Cells, then it would be Virchow.

which membranous organelle is found next to the nucleus and is covered in ribosomes?

Answers

Answer:

The endoplasmic reticulum (ER) is a membranous organelle that shares part of its membrane with that of the nucleus. Some portions of the ER, known as the rough ER, are studded with ribosomes and are involved with protein manufacture.

Explanation:

Answer: Rough endoplasmic reticulum

Proof of validity is shown below.

7. What is the difference between a monosaccharide, disaccharide and a polysaccharide?

Answers

Explanation:

Monosaccharide are the simplest form of sugar. Example: Glucose and Galactose

Disaccharides are two units of monosaccharide. Example: Sucrose, Lactose and Maltose

Polysaccharide are more than two units of monosaccharide. Example: Cellulose and Starch

color vision in vertebrates is made possible by cone cells.

Answers

Answer:

Is that a question or are you just stating a fact.

Explanation:

Somebody help me please

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Answer:

ppap

Explanation:

What will most likely happen if the human population continues to grow and carelessly emit gases?

Answers

Answer:

The human population will most likely end up having issues living on earth making them have to move to some other planet that we will ruin. Anyways, we will most likely end up extinct.

the central focal point in the retina where cones are heavily concentrated is known as the:

Answers

The answer is: fovea

Explanation: Fovea: In the eye, a tiny pit located in the macula of the retina that provides the clearest vision of all. Only in the fovea are the layers of the retina spread aside to let light fall directly on the cones, the cells that give the sharpest image. Also called the central fovea or fovea centralis.
The answer is fovea she’s write ✍️

Defina moléculas hidrofílico hidrofóbico y anfipático indique un ejemplo de bio molécula de cada uno de ellos explique cómo se comporta la molécula así Patikas en el agua y relacionarlo con la formación de la membrana biológica

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Answer:

English?

Explanation:

This energy was converted into ___________________ energy as the water flowed down the tube.

Answers

Answer:

Kinetic Energy

Explanation:

Kinetic energy is a form of energy that an object or a particle has by reason of its motion.

the answer is kinetic energy

Where do branch roots originate

Answers

Answer:

The branch root originates at the pericycle of the parent root, just outside the parent root's primary xylem.

Explanation:

The diagram shows a plant.
light
Which characteristic of living organisms is shown by the plant in the diagram?
A excretion
B reproduction
C respiration
D sensitivity

Answers

Answer: A

Explanation: Definition of Excretion: (in living organisms and cells) the process of eliminating or expelling waste matter. Hope this helps :3
It’s A because it helps get rid of waste water.

pls help


correct matching???


bio

Answers

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The Correct matches are :

Selective breeding :

The process by which desired traits of certain Plants and Animals.

Inbreeding :

Crossing parent organisms with the same forms of a trait to produce.

Hybridization :

Crossing parent organisms with different forms of a trait to produce.

PLS FAST "Can stem cells cure diseases"ESSAY
**100 POINTS**

Answers

Answer:

stems can cure diseases because it is a medicine for human beings

Explanation:

please mark me as brainlest

Choose 2 levels of organization of living things to describe in detail.

Answers

Kingdom and order. The kingdom is the largest level of organization that consist or two suborders animalia and plantae. Every living thing belongs to one of the to kingdoms. The level of species tells you the specific type of animal within a general category. For instance one species of monkey would be an orangutan

which organism is most likely to be responsible for the boils?

Answers

Answer:

Staphylococcus aureus

Explanation:

Which organism is most likely to be responsible for the boils? (Staphylococcus aureus is a halophilic, Gram-positive coccus that produces yellow colonies and ferments mannitol.) What is a boil? A boil is a flat, red rash affecting a great portion of skin surface area.

Look at the picture. What word describes the liquids in stage 1?

Answers

Answer:

let me ask wheres the picture

Explanation:

What picture? Can’t see any

tipos de adaptaciones esteno​

Answers

English:

Behavioral – responses made by an organism that help it to survive/reproduce.

Physiological – a body process that helps an organism to survive/reproduce.

Structural – a feature of an organism’s body that helps it to survive/reproduce.

Which is the best definition of species?

Spanish:

Conductual: respuestas hechas por un organismo que lo ayudan a sobrevivir / reproducirse.

Fisiológico: un proceso corporal que ayuda a un organismo a sobrevivir / reproducirse.

Estructural: una característica del cuerpo de un organismo que lo ayuda a sobrevivir / reproducirse.

¿Cuál es la mejor definición de especie?

No hablo español, tuve que traducir todo esto jaja

I dont speak spanish, i had to translate all of this lol

state the form in which carbohydrates are:1.transported in animals:plants​

Answers

In animals the body absorbs & transports broken-down carbohydrates in the body. The monosaccharide units, glucose, galactose and fructose are transported through the wall of the small intestine and then into the portal vein which then takes these elements straight to the liver.

In plants Carbohydrates are mainly transported in the phloem in the form of sucrose. The cell membrane of the sieve cells contains pump proteins that actively convey sucrose into the vascular pathways.

Hope this helps !

Somebody help me please

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Can more than one be answered?

Please help ill give everything I can I need help STAT!!! Xoxo ILL GIVE BRAINIESTTTT QUESTION DOWN BELOW

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I think 2 recessive alleles are required.

If it is correct, please mark Brainliest! :)

Which types of proteins help defend the body against foreign agents like bacteria?

A.
antibodies
B.
hormones
C.
enzymes

Answers

Antibodies- I hope that helps :)

a large, smooth, rounded articulating oval structure is called what?

Answers

It is called Condyle !


Hope this helps!

What is science meaning

Answers

Answer:

the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment.

Explanation:

Hope this helps :)

Pls make brainliest :P

And have an amazing day <3

Answer:

Science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. ... A science is a particular branch of science such as physics, chemistry, or biology.

Explanation:

hope this helps <333

brainliest plz ?:)

We have been talking about plant and animal cells over the past couple weeks. Plant cells have two organelles that animal cells do not contain. Name the two organelles that can be found in plant cells but not in animal cells and describe what each of those organelles do. Please answer in at least 5 complete sentences.

I will crown brainliest! pls help me

Answers

Answer:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.

Explanation:

brainliest

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