How is a scientific theory developed ?

Answers

Answer 1
Answer: A scientific theory is an explanation of why things happen that has been through rigorous testing until it's accepted as true.  Scientific theories are created through the process of the scientific method. Observation and research lead to a hypothesis, which is then tested.

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Natural selection is an evolutionary mechanism by which:. A. Advantageous traits are eliminated in a population B. Advantageous traits become more common in a population C. Inherited traits pass consistently through generations D. Organisms choose which traits to look for in their offspring
Which statement is a reason that modern human populations never reach Hardy-Weinberg equilibrium?(A)Evolution rarely occurs in human populations. (B)Mating is random in human populations. (C)Humans live in small, isolated groups. (D)Humans regularly travel all over the globe.

Select the scientific factor that has most advanced livestock breeding.A.fertilization
B.genetic testing
C.Immunizations
D.pesticides
E.weather studies
F.Irrigation

Answers

Final answer:

Genetic testing is the scientific factor that has most advanced livestock breeding, as it allows breeders to identify specific genes and traits in animals, helping them make informed breeding decisions.

Explanation:

The scientific factor that has most advanced livestock breeding is genetic testing.

Genetic testing allows breeders to identify specific genes and traits in animals, helping them make informed decisions about which animals to breed.

By selecting animals with desired genetic traits, breeders can improve the quality and productivity of livestock over time.

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Tratando-se sobre atividades aeróbias, segundo Cooper (1972), qual das alternativas abaixo não está correta? a) Aumento da eficiência dos pulmões e coração. b) Aumento das cavidades do coração, aumento do volume total de sangue e volume máximo de oxigênio (aumento da absorção, captação e transporte de oxigênio). c) Aumento do número e tamanho dos vasos sanguíneos. d) Melhora da tonicidade muscular e dos vasos sanguíneos. e) Diminuição do colesterol bom (HDL), aumento do colesterol mal (LDL) URGENTE

Answers

Answer:

Diminuição do colesterol bom (HDL), aumento do colesterol mal (LDL)

Explanation.

Esto debe revertirse, debe ser una disminución del colesterol malo y un aumento del colesterol bueno.

Básicamente, el ejercicio aumenta el HDL y reduce los triglicéridos. En condiciones normales, los ejercicios aeróbicos no reducen el LDL. Sin embargo, cuando se combina con cambios en la dieta y una pérdida de peso bien controlada, el efecto combinado podría reducir el LDL.

En las condiciones estándar, el ejercicio recomendado por semana es de 150 minutos de ejercicios suaves o 75 minutos de ejercicio vigoroso por semana.

Por lo tanto, cuando se calcula por semana, esto sería un promedio de 20 minutos de ejercicio por día.

Andar en bicicleta, caminar, hacer jardinería y aeróbicos acuáticos son ejemplos prácticos de ejercicios leves o moderados que podrían aumentar el HDL. Sin embargo, el baile aeróbico, el trote y el salto de cuerda son ejemplos de ejercicios vigorosos que, cuando se combinan con la dieta y la pérdida de peso, conducen a una disminución del LDL.

This should be reversed, it should be a decrease in bad cholesterol and an increase in good cholesterol.

Basically, exercise boosts the  HDL and lower triglycerides. Under normal conditions, Aerobic exercises do not reduce LDL. However, when combined with dietary changes and well-monitored weight loss the combined effect could lower LDL.

Under the standard conditions, the recommended exercise per week is 150 minutes of mild exercises or 75 minutes of vigorous exercise per week.

Therefore, when calculated per week this would be an average of  20 minutes of exercise per day.

Biking, walking, Gardening, and water aerobic are practical examples of mild or moderate exercises that could boost HDL. However, Aerobic dancing, jogging, and rope jumping are examples of vigorous exercises which when combined with dieting and weight losses leads to a lowering of LDL.

HELP ASAP!!!Which of the following best describes anabolic reactions?

Question 5 options:



Reactions which break down complex molecules into simpler ones and release energy



Reactions which involve a transfer of electrons between two species



Energy-storing reactions which link simple molecules together to make complex ones


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What are the folds of the inner membrane of mitochondria?

Question 18 options:



Matrix



Chloroplast



Cristae



-


Which statement correctly describe one similarity between cellular respiration and photosynthesis?

Question 13 options:



Cellular respiration and photosynthesis both use light to produce energy



Cellular respiration and photosynthesis both have water and carbon dioxide in the reactions



Cellular respiration and photosynthesis both produce sugar




THANK YOU SO MUCH!!!

Answers

Q: 5: Which of the following best describes anabolic reactions?

Answer:

Energy-storing reactions which link simple molecules together to make complex ones

Explanation:

Anabolism or anabolic reactions comprise the process during which simpler molecules are joined or linked to form  complex compounds. These reaction require the input of energy but ultimately that energy is stored in complex molecules for later use.

Organisms employ the reactions which absorb the energy in several reactions. and this absorbed energy is then stored for later use to perform various activities of the body.

For example: Photosynthesis is the common example during which energy from the sun is used to create sugar based molecules like sucrose and glucose. The formation of glucose is an anabolic process because it makes complex compound from simple compounds and stores energy in them which is later used to by plants to perform daily activities and work.

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Q: 18: What are the folds of the inner membrane of mitochondria?

Answer:

Cristae

Explanation:

Cristea are the fodings present in  inner mitochondrial membrane . The reason why there are called cristae came from  Latin word crest that means wrinkled or irregular shape in a way that increases the surface area of the object.

If we look at cristea in mitochondria , its purpose is same, to provide a huge amount of surface area for the diverse types of reactions of cellular respiration that takes place in the inner mitochondrial membrane.

These folds not only enhance surface area but also support aerobic cellular respiration in a number of ways.  there are large amount of proteins studded in cristaea like cytochromes and ATP synthases  that make sure an efficient execution of the process of cellular respiration.

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Q 13: Which statement correctly describe one similarity between cellular respiration and photosynthesis?

Answer:

Cellular respiration and photosynthesis both have water and carbon dioxide in the reactions

Explanation:

If we talk about the processes of photosynthesis and Cellular respiration  both are almost exact opposite in nature. The products of cellular respiration are the reactants of photosynthesis and vice versa.

The sunlight in mandatory for the execution of photosynthesis however, cellular respiration depends on the supply of glucose and ultimate three phases (glycolysis, kreb cycle and electron transport chain) to transform the glucose in the usable energy reservoir ATP.

But still, when we look at the equations of cellular respiration and photosynthesis, we see something is common. And what is that common thing is,  Cellular respiration and photosynthesis both have water and carbon dioxide in the reactions. (please see attached figure).

In cellular respiration, water and carbon dioxide are the products along with energy, while in photosynthesis water and carbon dioxide are the reactants.


Hope it helps!

Final answer:

A. The correct option is c.

B. The correct option is c.

C. The correct option is b.

Anabolic reactions are energy-storing reactions linking simple molecules to create complex ones. The folds of the inner membrane of mitochondria are called cristae. Cellular respiration and photosynthesis both involve water and carbon dioxide in their reactions.

Explanation:

The best description for anabolic reactions is option c. Anabolic reactions are energy-storing reactions which link simple molecules together to create more complex ones. They involve the formation of larger molecules from smaller ones. This process requires energy, often sourced from ATP molecules generated by catabolic reactions. Examples of anabolic reactions include the combination of monosaccharides to form polysaccharides, fatty acids to form triglycerides, amino acids to form proteins, and nucleotides to form nucleic acids.

The folds of the inner membrane of mitochondria are called cristae. These folds increase the surface area of the membrane, enabling a greater space for activities related to cellular respiration, such as the production of ATP.

A correct similarity between cellular respiration and photosynthesis is that both processes involve water and carbon dioxide in the reactions. These two processes are crucial for energy transfer in most life on Earth.

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The complete is question here:

Question a.

Which of the following best describes anabolic reactions?

a. Reactions which break down complex molecules into simpler ones and release energy

b. Reactions which involve a transfer of electrons between two species

c. Energy-storing reactions which link simple molecules together to make complex ones

Question b.

What are the folds of the inner membrane of mitochondria?

a. Matrix

b. Chloroplast

c. Cristae

Question c.

Which statement correctly describe one similarity between cellular respiration and photosynthesis?

a. Cellular respiration and photosynthesis both use light to produce energy

b. Cellular respiration and photosynthesis both have water and carbon dioxide in the reactions

c. Cellular respiration and photosynthesis both produce sugar

What is the primary product of light independent reactions

Answers

The primary products of the light independent reactions  (after one turn of the cycle) are:

a)  two G3P molecules

b)  three ADP

c) two NADP+

However ADP and NADP+ are not really "products". They are regenerated and later used again in the Light-dependent reactions.  Each G3P molecule is composed of three carbons.

For the Calvin cycle (Light independent cycle) to continue, 5 out of  the 6 carbons provided by the two G3P molecules are used to regenerate ribulose 1, 5 phosphate. Therefore there  remains only one carbon for the next turn of the cycle.

One  molecule of glucose requires 6 turns of the cycle. Any extra G3P is used to make starch, sucrose and cellulose.



Photosynthesis contributes to plant growth by _____.A) taking in oxygen and making wood
B) taking in carbon dioxide and making sugars (carbohydrates)
C) synthesizing carbon dioxide and making cellulose
D) converting sugar to oxygen and water

Answers

Photosynthesis contributes to plant growth by taking in carbon dioxide and making sugars (carbohydrates). Option B is correct.

In photosynthesis, carbon dioxide and water are converted to oxygen and glucose. The glucose is consumed by the plant as food. Oxygen is produced as a by-product of photosynthesis.

In cellular respiration, oxygen, and glucose are converted to water and carbon dioxide, with water and carbon dioxide being by-products. ATP is the energy that is converted from the process.

Photosynthesis is the process of converting sunlight or solar energy to chemical energy. The productivity of agricultural crops is directly dependent on the photosynthesis rate.

Therefore the correct option is option B.

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Answer: B) taking in carbon dioxide and making sugars (carbohydrates)

Input: Photosynthesis contributes to plant growth by taking in carbon dioxide and making sugars (carbohydrates).

Explanation: It contributes to the growth of plants.

Which of the following is a need of most plants? A. To release carbon dioxide to the environment. B. To take up oxygen from the environment. C. To release water through their leaves. D. To capture sunlight to perform photosynthesis.

Answers


The  best  answer is D.

Plants need energy to grow and reproduce. This energy is gotten by the process of cellular respiration. This  process uses  carbohydrates as  substrate .

To be able to get carbohydrates, plants, unlike animals, have to manufacture it. Animals do not make their own food but plants do.

The plants therefore must engage in photosynthesis to make carbohydrates and this requires light to provide solar energy to drive the process, thus most plants, especially green plants, must have sunlight , without which they cannot live.


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