What is quicksand? how does it work?

Answers

Answer 1

Answer: quicksand is formed when regular sand, or mud or gravel comes in contact with a flowing water source, usually an underground stream.
The flowing water flows in between the particles of sand and acts as a lubricant to reduce the friction.the sand particles get suspended in water and sand changes into liquefied state.As long as the water flows,the quick sand bed will exist.

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A person who is homozygous for a type A blood and a person who is homozygous for type B blood will have offspring with type AB blood . What pattern of inheritance does this represent

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Autosomal Dominant Inheritance

In autosomal dominant inheritance, only one copy of a disease allele is necessary for an individual to be susceptible to expressing the phenotype.

With each pregnancy, there is a one in two (50%) chance the offspring will inherit the disease allele.

Unless a new mutation has occurred, all affected individuals will have at least one parent who carries the disease allele.

Autosomal dominant inheritance is often called vertical inheritance because of the transmission from parent to offspring.

Across a population, the proportion of affected males should be equal to the proportion of affected females.

Male-to-male transmission can be observed.

Examples of diseases with autosomal dominant inheritance include myotonic muscular dystrophy and Huntington disease.

3.3 Autosomal Recessive Inheritance

In autosomal recessive inheritance, two copies of a disease allele are required for an individual to be susceptible to expressing the phenotype.

Typically, the parents of an affected individual are not affected but are gene carriers.

With each pregnancy of carrier parents:

There is a one in four (25%) chance the offspring will inherit two copies of the disease allele and will therefore have the phenotype.

There is a one in two (50%) chance the offspring will inherit one copy of the disease allele and will be a carrier.

There is a one in four (25%) chance the offspring will inherit no copies of the disease allele and will not express the phenotype or be a carrier. This individual would not be at risk for passing the disorder on to his/her offspring.

How does dna give us our traits?

Answers

Answer:

Each parent passes half of there chromosomes to there child. DNA is passed down to the next generation. We get our traits from our parents, grandparents, and relatives. And a very low percentage of people get there traits from there great great great grandparents.

How many independent variables can be tested in a controlled experiment? A. one
B. two
C. three
D. as many as you want

Answers

One independentvariables can be tested in a controlled experiment. The correct option is A.

What is a variable?

A person, place, thing, or phenomenon that you are attempting to quantify in any way is simply referred to as a variable in research.

The best approach to distinguish between a dependent and independent variable is to look at what the words themselves reveal about the variable you're using.

Only one variable at a time should be tested in an experiment. This guarantees that the experimental result is definitely caused by a single, recognisable component.

A controlled experiment in a scientific study is a test that the researcher actively modifies such that only onevariable is examined at a time.

Thus, the correct option is A.

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hey there, i believe that your answer will be choice C!

Are predator-prey relationships density-dependent or density-independent limiting factors explain

Answers

Answer: Density dependent

Explanation: It is a density dependent because there has is a direct correlation between the ratio of predatory animals to prey animals for an ecosystem to function properly. Otherwise the ecosystem begins to die.

Final answer:

Predator-prey relationships act as density-dependent limiting factors in ecosystems, affecting population sizes based on the density of the populations involved. These biological interactions include predation and competition, which can increase mortality or decrease reproductive rates.

Explanation:

Predator-prey relationships are typically considered density-dependent limiting factors in ecosystem dynamics. This means that the effects of these relationships on population sizes vary with the density of the population. For instance, as the prey population increases, it provides more food for predators, which can result in an increase in the predator population. However, as the predator population grows, it starts to reduce the prey population through increased predation. Conversely, when prey becomes less abundant, predator numbers may decline due to the scarcity of food.

Density-dependent factors such as predation, competition for food, disease, and waste accumulation are biotic factors that often lead to increased mortality or reduced reproduction rates within populations, thus regulating their sizes. These factors intensify as the population density increases, demonstrating a direct correlation between the impact of these factors and the number of individuals in a population.

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What is a community that has reached a stable stage of ecological succession called

Answers

Pioneer species is the proper term for a community that has reached a stable stage of ecological succession

Answer:

Climax community

Explanation:

which industrial city would have fewer air pollution incidents related to temperature inversions one on the great plains or one near the rocky mountains? explain your answer.

Answers

Answer:

The Great Plains

Explanation:

Hot air has a much lower density than cold air and for this reason, the large plains would be ideal for an industrial city if the goal is to have fewer air pollution incidents related to temperature inversions. This is because if the large plains are lower, soon the hot air will rise while the cold air will tend to go down.

In short, within the great plains the hot air being less dense rises, in contrast, the cold air (more dense) descends, forming the convection currents.

I think that the plains, because the temp. is the same all around, cuz its flat... the mountains get cold at the top

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Manuel is performing a scientific investigation to determine whether fertilizer A or fertilizer B is more effective at increasing the growth rate of tomato plants. Manuel measures and separates 30 tomato plants into two equal groups that are planted in identical environments. He gives one group fertilizer A, and gives the other group the same amount of fertilizer B. During the first week of the investigation, he gives the tomato plants in both groups the same amount of water. During the second week, however, he forgets to water the tomato plants being given fertilizer B, but still provides water for the tomato plants being given fertilizer A. Two weeks after planting, Manuel measures the tomato plants and discovers that the tomato plants given fertilizer A have grown much more rapidly than the tomato plants being given fertilizer B. Manuel's resultsA. are not valid because one of the variables was not controlled during week 2. B. are valid because he controlled all of the variables in week 1. C. are valid because he designed his experiment correctly. D. are not valid because he should not have grown the plants in identical environments.