BIOLOGY HIGH SCHOOL

William is testing what type of light best helps bean plants grow. He plants four beans in four separate pots. He places each pot in a different room and subjects them to different types of light., and he waters each plant the same amount. He uses sunlight, ultraviolet, fluorescent, and black light. William then measures the height and growth rate of each plant. What is the control for William’s experiment? A) sunlight B) ultraviolet C) fluorescent D) black light

Answers

Answer 1
Answer:

A control is a variable-independent element. Therefore, option (A) sunlight is the control used as a point of comparison.

What is a scientific control?

Experiments and observations in the field of science that are designed to reduce the influence of factors other than the one being studied are examples of scientific controls. This makes the results more reliable, most commonly by allowing a comparison to be made between the control measurements and the other measurements.

Controls reduce the effects of other factors on the experiment. It verifies an experiment's claim. Controls are needed for all experimental testing, not just science.

Therefore, sunlight is used as control because its a natural source of light and most plant grows in it.

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Answer 2
Answer: It is A, sunlight. The variable is the type of light used, and the control is used to measure the effects of the variables, so since sunlight is the normal light, it is the control.

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Which is true for both photosynthesis and cellular respiration?A.They are simple chemical reactions.B.They are complex chemical reactions. C.They require light energy from the sun. D.They require cells to use water.
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In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result?A.The chances for survival of the population are reduced. B.New food sources are discovered and become the regular diet. C.Individuals that are well suited to the environment reproduce, and those that have lesser adaptations die before they reproduce. D.The environment adapts by providing more resources to the growing population, increasing the chances of survival for individuals within the habitat.

Which of the following types of mass movement occur along a curved surface

Answers

There are different types of mass movements. They are: 1. rockfall--free falling of rocks or debris of rocks from a steep cliff. 2. mudflow--commonly known as mud slides. This is another form of slope movement a proportion of clay and debris rapidly flow. 3.landslip/landslide--is a mass movement that involves a great range of ground movements. This can happen under water,at the coast or even on shore. 4. slump--happens along a curved surface over a short distance.5. soil creep--also known as downhill creep. This is a slow progression of rocks downward. Therefore, the answer to this question is "slump".
It is a slump , hope that helps

Which of the following is true of RNA compared to DNA?a. It lacks phosphate groups.
b. It is a single-stranded molecule.
c. Its nucleotides do not have sugars.
d. It contains four different nucleotides.

Answers

The correct answer is B. It is a single-stranded molecule. It does not lack phosphate group but rather has a different one so there's also 4 but they're a bit different. Unlike the DNA that is a double spiraling strand, the RNA is just a single strand that goes on and on. Although similar, it does completely different things from the DNA.

Final answer:

RNA is a single-stranded molecule, in contrast to the double-stranded structure of DNA.

Explanation:

b. It is a single-stranded molecule.

RNA is a nucleic acid that is similar to DNA, but with a few key differences. One of these differences is that RNA is single-stranded, while DNA is double-stranded. This means that RNA is made up of only one chain of nucleotides, while DNA has two chains that are complementary to each other.

Other differences between RNA and DNA include:



  1. RNA contains the sugar ribose, while DNA contains the sugar deoxyribose.
  2. RNA uses the nitrogenous base uracil, while DNA uses thymine.
  3. RNA is typically shorter than DNA.

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Phytoplankton play an important role in which of the following biogeochemical cycles?A. the nitrogen cycle
B. the phosphorus cycle
C. the carbon cycle

Answers

The answer is C. Phytoplankton play an important role in the carbon cycle. They are critical in regulating carbon in the cycle. These organisms consume carbon dioxide from the atmosphere and transport the gases and nutrients from the surface of the ocean to the deep.

In convection, hot gases rise through cooler gases as they travel to the top of the convective zone. Once they reach the top of the convective zone, they cool. What happens to these gases next?

Answers

These gases lower as they cool.

How does the greenhouse effect occur?

Answers

Answer:

green house effect warm up the temprature of earth. the sunlight which reflect back to space some of those are absorbed by greenhouse gasses which results green house effect.as a result the temperature increase and the level of CO2 increases this is the work of green house effect.

Answer:

the greenhouse effect happens when greenhouse gases are trapped in a close dspace, and cause humidity and heat to rise. This happens outside two, within the atmosphere, and makes icebergs melt . It helps create global warming

Explanation:

Why do doctors recommend that people get a flu shot each new flu season?The flu virus becomes immune to the vaccine
The vaccine wears out over time?
The flu virus changes every year <----?
The body eliminates the vaccine

Answers

The doctors recommend that people get a flu shot each new flu season because the flu virus changes each year. The correct option among all the options that are given in the question is the third option. There are three kinds of virus vaccines and the virus vaccines changes each year depending on the type of flu.

Answer:

The correct answer would be the third option.

Vaccination refers to the administration of weekend or attenuated microorganism or antigen in the body. It helps in developing adaptive immunity in the body.

Thus, vaccine neither wears out with time nor body eliminates the vaccine.

However, the flu virus changes every year due to the short life cycle. Consequently, the memory B cells cannot recognize changed virus due to which the body loses its immunity against the virus.

This is why doctors recommend that people should get flu shot each new flu season.
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