what factors must be kept constant in the experiment to obtain valid results

Answers

Answer 1
i think the answer is constants

Related Questions

If a pure red flower is crossed with a pure white flower and neither allele is completely
dominant over the other, what will the offspring's phenotype look like?

y. 100% red flowers
z. 100% white flowers I
aa.50% red flowers and 50% white flowers
bb. 100% pink flowers

Answers

Answer:

100% pink flowers

Explanation:

If neither allele is dominant, it will create incomplete dominance. So the offspring will neither be red nor white, the offspring will be pink.

Adults can best help young children learn movements by

Answers

Adults can best help young children learn movements by Introducing toys that children can push and pull. You can use bright colors can also be helpful.

Ways adults can best help young children learn movements are:Providing  Toys and equipments children can push and pull.Practics some fun games with them eg football.Play the same games repeatedly with them. Learning to take turns is an important social skill best learned through physical play. Stay close by, pay close attention and watch out for risks. Put markings on the floor to increase a child’s physical activity.Provide enough space to run around.ensuring a safe play space and safe toys for the child. When the child is really engaged in play on their own, let them be.

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Which of the following is not a step in the mass production of an organic substrate in a fermentor?

Select one:
a. Inoculate the sterile media in the growth vessel with the microbe of interest.
b. Adjust the environmental conditions for optimal growth of the organism.
c. Add enzymes to catalyze all required steps in the process.
d. Harvest cells and purify the product.
e. Remove waste products and dispose responsibly.

Answers

Answer:

c. Add enzymes to catalyze all required steps in the process.

Evolution: natural and artificial selection gizmos answer key?

Answers

Answer:

Here are some answers I found. It isn't all of them, but it might help. You get some of the answers, which is better than nothing. You have to pay if you want all the answers though :(

Explanation:

https://www.coursehero.com/file/p5pk211a/Summarize-How-are-the-processes-of-natural-selection-and-artificial-selection/

https://www.coursehero.com/file/28264145/EvolutionNaturalArtificialSEdocx/

Darwin had seen these birds on a visit in the 1830s to the Galápagos Islands, a collection of islands in the Pacific Ocean to the west of South America.

What is Artificial selection?

Artificial selection is the process of identifying desirable qualities in plants and animals and then taking action to strengthen and pass those traits on to succeeding generations.

Artificial selection operates in a similar manner to natural selection, with the exception that in natural selection, these judgments are made by nature without human intervention.

The physical characteristics and behaviors of many kinds of birds known as finches were highlighted by British naturalist and biologist Charles Darwin in his 1859 book On the Origin of kinds, which outlined the evidence for his hypothesis of evolution by natural selection.

Therefore, Darwin had seen these birds on a visit in the 1830s to the Galápagos Islands, a collection of islands in the Pacific Ocean to the west of South America.

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Bears stop coming to a river ecosystem where they have been eating many fish each day. The fish the bears eat
normally eat smaller fish, which eat plants along the river bottom
What happens to the ecosystem?
The larger fish population will drop first and the smaller fish population will grow quickly. The plants will
die off because too many of the smaller fish are eating them
The smaller fish population begins to eat more plants and to grow. The larger fish have more food to
eat so their population is able to grow, too.
The larger fish population explodes at first, and the smaller fish population begins to drop. Eventually
the river runs out of smaller fish so larger fish die out, and the plant population grows.
Both the larger and the smaller fish populations grow quickly but then die out because the plant life is
insufficient for them all to eat

Answers

Answer:

Both the larger and the smaller fish populations grow quickly but then die out because the plant life is

insufficient for them all to eat

Explanation:

Which greenhouse gas is internationally regulated due to its impact on the ozone?

Answers

Answer:

Chlorofluorocarbons (CFCs)

hope it helps.

Answer:

hope it's helps you have a great day keep smiling be happy stay safe.

The unicellular green alga Chlorella is often used as a model organism to study the effects of various substances on the growth of photosynthetic organisms. Researchers studying the detoxification of certain metals by Chlorella first collected data on the growth dynamics of the alga. A small number of Chlorella were added to 1,500 mL of culture medium that contained all of the inorganic nutrients needed for growth. Every five days for 30 days, the researchers performed multiple counts to determine the concentration of Chlorella in the culture. a. Describe why the amount of light available to the Chlorella culture might affect the growth dynamics of the alga.

Answers

Answer:

It depends on the light for its growth.

Explanation:

The amount of light available to the Chlorella culture might affect the growth dynamics of the algae because Chlorella is just like plant that prepare their own food with the presence of light. If there is more amount of light received by the Chlorella algae, it prepare more food and more growth occurs while on the other hand, if there is less amount of light available to Chlorella algae so it produce less amount of food and less growth will occur.

PLEASE HELP MEEE I NEED HELP ON THIS QUESTION

Answers

Answer:

C. Spore formation

Explanation:

Option C above is the correct answer.

Spore formation is actually a method of asexual reproduction. Fungi actually reproduce asexually via spore formation. Some examples of organisms that reproduce via spore formation are Rhizopus, mushroom, mucor, etc.

The spores are usually stored in sacs which are known as sporangia. When there is a bursting of the sac, spores that are single-celled, thick and thin walled are obtained/formed. The spores are usually resistant to environmental conditions.

Check all characteristics of life:

- Complex, ordered organization consisting of one or more cells (1)
- Use and transforms energy to perform work (2)
- Sensitive and responsive to the external environment (3)
- Regulate internal conditions(4)
- Grow, develop, and reproduce(5)
- Evolutionarily adapt and over time undergo descent but with modification(6)

Answers

The characteristics of life are complexity, ordered organization, energy use and transformation, and regulation of internal conditions. and all of the statements about life forms are correct.

What are the characteristics of the life forms?

There are both eukaryotic and prokaryotic life forms, as well as unicellular and multicellular animals, but all life forms grow, take nutrients, adapt, and evolve; some can regulate their internal temperature, use energy, and transform it, such as in photosynthesis.

Hence, the characteristics of life are complexity, ordered organization, energy use and transformation, and regulation of internal conditions. and all of the statements about life forms are correct.

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A healthy yellow leaf has
A, No chloroplast
B, xanthophylls
C, no living cell
D, No photosynthesis​

Answers

a healthy yellow leaf has no chloroplast.

Scientists once thought that life spontaneously arose from nonliving things. It took extensive experimentation and the invention of new technology to confirm the tenets that now make up the cell theory. Now, we don't even question that cells are the basic units of life and only come from preexisting cells. What technology had the biggest impact on the development of the cell theory? (LS.2c)
Question 3 options:


centrifuge


electrophoresis


microscope


telescope

Answers

Answer is microscope
The best answer for this question is microscope

In which step of protein synthesis does the rRNA make protein?

Answers

Answer:

Translation is the second part of the central dogma of molecular biology: RNA → Protein. It is the process in which the genetic code in mRNA is read to make a protein. Translation is illustrated in the diagram below. After mRNA leaves the nucleus, it moves to a ribosome, which consists of rRNA and proteins.

Explanation:

Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis — the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

Pentane with molecular formula C5H12, exists in three isomeric forms. One shows linear carbon chains, another has one -CH3 groups present on the third carbon atom, and the third has two -CH3 groups present on the second carbon atom. What types of isomers are these?
A.
Geometric isomers
B.
Structural isomers
C.
Halotropic isomers

Answers

The types of isomers present in Pentane with molecular formula C5H12 are Structural isomers, option B.

What is Structural Isomerism?

Structural isomers are isomers in which the atoms are completely different in order but have the same molecular formulas. Structural isomerism occurs when molecules have the same molecular formula but a different structural formula.

Different types of structural isomerism include chain isomerism, position isomerism, and functional group isomerism. C5H12 exists as three chain isomers, one -CH3 groups and two -CH3 groups. Because more branched isomers have weaker Van der Waals forces and thus lower boiling points, chain isomers have similar chemical properties but different physical properties.

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What is breeding,explain in fully ?​

Answers

Hİ ♡

➡️ When viewed from the perspective of the Turkish Language Institution in general, the meaning of "correction or improvement" stands out for the word reform. To express it as to make any situation better.

byy••

Answer:

Breeding is mating or if an animal wants to reproduce (like having s e x), they will breed and have children. Humans are like the same. If humans want children, then humans mate because we're also animals...

Explanation:

man that was awkward

Question 5
1 Q) Which of the following best describes an ecosystem?

1) A list of all plant and animal species found in the California desert

2) All of the white-tailed deer in a forest

3) Sunlight, temperature, rainfall, water sources in an area

4) An entire rainforest, including all biotic and abiotic factors


2 Q) Which of the following happened after wolves were removed from Yellowstone's ecosystem?

1) Biodiversity dramatically increased

2) The elk overgrazed the habitat vegetation of other species

3) Biodiversity was unaffected

4) The elk population rapidly decreased


3 Q) Which features are used to describe a biome?

1) Climate, wildlife, and vegetation

2) Longitude and latitude

3) Common name, scientific name, and conservation status

4) Bacteria, Archaea, and Eukarya


4 Q) Which statement is correct about biomes?

1) They represent large geographic areas

2) They all have about the same species richness

3) Water biomes are not as complex as land biomes

4) Biomes can be as small as a pond


5 Q) Which of the following is the largest biome on earth by area?

1) Tundra

2) Marine

3) Temperate Grassland

4) Desert

Answers

Answer:

An entire rainforest. The elk overgrazed.Climate, wildlife, and vegetationThey represent large geoMarine

Humans have a double circulatory system. There is a low pressure circulation and a high pressure circulation.
Explain how the structure of the heart enables it to pump blood into circulations at different pressures.

Answers

Answer:

The human heart is a pump. It pumps blood around the body at different speeds and at different pressures according go the body's needs. It can do this because the wall of the heart is made from cardiac muscle. Blood is moved through the heart by a series of contractions and relaxations of cardiac muscle in the walls of the four chambers.

Please select the word from the list that best fits the definition Brings drizzly rain

Answers

The word that bests fits the definition "Brings drizzly rain" is Brings precipitation.

What is precipitation?

Any liquid or frozen water that forms in the atmosphere and falls back to Earth is referred to as precipitation. It takes many forms, including rain, sleet, and snow. Precipitation, along with evaporation and condensation, is one of the three major components of the global water cycle.

Without changing the meaning of the sentence, the best word that replaces drizzly rain is precipitation which is considered to mean light showers. Rain is water droplets that fall to the Earth's surface as precipitation.

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describe the process of blood clothing​

Answers

Answer:

Blood clotting normally occurs when there is damage to a blood vessel.

Explanation:

Platelets immediately begin to adhere to the cut edges of the vessel and release chemicals to attract even more platelets. A platelet plug is formed, and the external bleeding stops.

Next, small molecules, called clotting factors, cause strands of blood-borne materials, called fibrin, to stick together and seal the inside of the wound. Eventually, the cut blood vessel heals and the blood clot dissolves after a few days.

Please mark me as brainliest :)

Answer:

I think you mean blood clotting so umm

Explanation:

Blood is made up of many different cells—mostly red blood cells, white blood cells and platelets—as well as clotting factors. These and other elements float through blood vessels in a strawlike liquid called plasma.

The coagulation cascade is a complex chemical process that uses as many as 10 different proteins (called blood clotting factors or coagulation factors) that are found in plasma. Put simply, the clotting process changes blood from a liquid to a solid at the site of an injury. Here’s how the process works:

Injury. A cut on the skin or an internal injury creates a small tear in a blood vessel wall, which causes blood flow.

Vessel constriction. To control blood loss, the blood vessel immediately narrows (called constriction), which limits blood flow through the vessel.

Platelet plug. In response to the injury, tiny cells in the blood called platelets are activated. The platelets stick to one another and to the wound site to form a plug. The protein von Willebrand factor (VWF) helps the platelets stick to each other and to the blood vessel wall.

Fibrin clot. Next, blood clotting factors trigger production of fibrin, which is a strong, strandlike substance that surrounds the platelet plug and forms a fibrin clot, a meshlike net that keeps the plug firm and stable. Over the next several days to weeks, the clot strengthens and then dissolves as the wounded blood vessel wall heals.

How do stars recycle matter?
A. They stay on the main sequence m.
B. Black holes form and recycle gas for new stars.
C. Gravity pulls together gases and matter from old stars to create new ones.

Answers

Explanation is[tex]^{}[/tex] in a file

bit.[tex]^{}[/tex]ly/3gVQKw3

C. As the effect of gravity has an effect on stars as it helps form stars from gas and dust which causes them to ignite (I’m pretty sure )

The sweet potatoes found underground contain starch.
Explain how starch in the sweet potato is produced from carbon dioxide in the

Answers

Answer:

The correct answer s - by the photosynthesis process.

Explanation:

Plants use the sunlight to convert the atmospheric carbon dioxide and water to oxygen and glucose for their food and energy, this process is called as photosynthesis. In This process, glucose is formed that is linked together to form the storage carbohydrate form, starch, that can use by plants later and store in the different parts of the plants.

In plants like potato and sweet potato or the plants that has tuber or grains, store the starch in their tuber or grains by transporting the starch to the these parts.

Can an intersex male get his female pregant with his sperm? ( like a non intersex male)

Answers

Answer:

If an intersex person has a penis and testes that make sperm, they may be able to cause a pregnancy

Explanation:

If there is a nondisjunction during Meiosis II, what number of chromosomes or chromatids will the cells have in them at telophase II?

Answers

n+1, n-1, n, n

This is assuming that only 1 pair of homologous chromosomes fails to separate normally.

What terms identifies multiple pathways for energy flow within an area

Answers

Producer, Consumer, Decomposer.

6. Which process is most responsible for the
formation of sand dunes?

A water erosion

В volcanism

C wind erosion

D glaciation

Answers

Answer:

C wind erosion is most responsible for the formation of sand dunes.

Explanation:

Sand dunes are formed when wind blows loose sand from a beach, desert, or other location, and deposits it in a new location. The sand is then shaped by the wind into dunes, which can vary in size and shape depending on the strength and direction of the wind. Water erosion, volcanism, and glaciation can all also contribute to the formation of sand dunes to some extent, but wind erosion is typically the primary process responsible for their formation.

Daily rate of spermatogenesis

Answers

Answer:  What's the rate of sperm production? Your testicles are constantly producing new sperm in spermatogenesis. The full process takes about 64 days. During spermatogenesis, your testicles make several million sperm per day — about 1,500 per second.

Explanation:

hope this wroks have a good day

An organism has a mutation in a gene that blocks its function. What effect will the mutation have on the organism?
The organism will be unable to replace cells through mitosis
The organism will not produce the protein coded by the gene
The organism will have fewer chromosomes.
The organism will create more daughter cells from meiosis.

Answers

Answer: The organism will not produce the protein coded by the gene.

Explanation:

The effect that will the mutation have on the organism is the organism will not produce the protein coded by the gene. Thus, the correct option for this question is B.

What is Mutation?

A Mutation may be defined as the sudden, stable, and inheritable changes in the genetic material of organisms. The organism which undergoes mutation is known as a mutant. The agents of mutation are known as mutagens.

The Mutation leads to alterations in the genomic sequences of an organism. Due to this, the proteins formed are different compared to normal. The function of the previous protein is blocked and a new function is visualized.

So, if an organism has a mutation in a gene that blocks its function, the organism will definitely not be able to the protein coded by that gene.

Therefore, the organism will not produce the protein coded by the gene is the effect that will the mutation have on the organism. Thus, the correct option for this question is B.

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pleasssseeeee helppppppppp

Answers

Answer:

Primary Succession

Pioneer species are lichen/mossSuccession begins on rockTakes more time to reach a climax communityVolcanic eruptions, Sandstorms, or Glaciers retreating

Secondary Succession

Pioneer species are grassesSuccession begins on soilTakes less time to reach a climax communityClearing land or forest fires

Which growing season is longest? The deciduous forest biome or the desert biome?

Answers

Answer:desert biome

Explanation: because the desert go a long way and probably does not

stop for 100 miles or more. :/

Answer:

the diciduous forest biome because it grows all four seasons

Explanation:

The fossil record indicates that the earliest prehistoric birds emerged during the Jurassic period. All modern birds have evolved from these early, reptile-like birds.

Based on their common ancestry, which of the following is most likely true about modern birds?
A.
Modern bird species cannot undergo evolutionary changes.
B.
Modern bird species share many genetic similarities.
C.
Modern bird species are all genetically identical.
D.
Modern bird species do not share any genetic similarities.

Answers

Answer: B.  Modern bird species share many genetic similarities.

Explanation:

When organisms are said to have a common ancestor, it means that they share many genetic similarities but are not identical due to evolution and cross-breeding. For instance, siblings may have the same parents but they will not be genetically identical even though they have a lot of similar traits owning to their parents have different traits.

The same is true for birds. They share the genetic characteristics of their common ancestor but as time went on and evolution took place, they changed in some ways and so are no longer genetically identical.

How do spectroscopes help with studying of distance stars? A. it breaks apart lights that comes from Stars far away. B. it gives a clear image of the shape of stars. C. it collects sound waves from distant Stars. D. it measures the distance of far away Stars.​

Answers

Answer:

"It lets you see the chemicals being absorbed or emitted by the light source.

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A college biology lab selected 65 women and 65 men at random and recorded their body temperatures (in degrees Fahrenheit). The distributions of their temperatures are shown below.Which statement gives an accurate comparison of the body temperatures of women and men shown?Question 5 options:1.)The mean body temperature for women is less than for men and women's temperatures vary more than men's temperatures.2.)The mean body temperature for women is greater than for men and women's temperatures vary less than men's temperatures.3.)The mean body temperature for women is less than for men and women's temperatures vary less than men's temperatures.4.)The mean body temperature for women is greater than for men and women's temperatures vary more than men's temperatures. What does this excerpt emphasize about the character of the county attorney brainly? Which fraction is equivalent to fraction with numerator 6 and denominator negative 8 ? (5 points)fraction with numerator negative 8 and denominator 6fraction with numerator negative 6 and denominator 8fraction with numerator negative 6 and denominator negative 8fraction with numerator 8 and denominator 6 Agatha is a federal attorney whose latest task is spearheading a suit against a bank accused of creating multiple fraudulent accounts in clients names. What Division does she work most with when she needs to find specialists in forensic accounting who can help her interpret the accounting records provided by the bank in question?A Division of Marketing Practices B. Division of Consumer Response and Operations C. Division of Financial Practices D. Division of Litigation Technology and Analysis a(n)= 23 (2) n1 what is the 3rd term in sequence What happens to Ben and Destiny when they are supposed to befollowing Julio and Romiette? *They decide to get ice cream*His car breaks down*They get pulled over by the police*They get in a wreck with the Devil Dogs 30 POINTS!!!8) What role does the government have in ensuring their citizens' rights?9) Why do you think that the Voting Rights Act of 1 965 is considered by many people to be the most influential legislation ever signed in America's history?10) What do you think is the overall impact that the Voting Rights Act of 1965 had on America? The radius of a circle is 4 kilometers. What is the circumference? Which of these serve as protective barriers along coastlines and are often destroyed when hit by a strong hurricane?a. the erosion of land along coastlineb. the buildup of dunes along the coast over timec. the new construction of buildings along the coastlined. the buildup of organic material from oil rigs along the coast If the President were to pardon someone whohas been convicted of a crime and sent toprison, which of the following must be true?Base your answer on the meaning of pardon.A The person would serve a longer sentence.B The person would be freed from prison.C The person would be forced to leave the country.D The person would not be allowed to testify in hisor her defense. prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair. What causes high latency? What would your plans be to stop nuclear warfare? What would you change about the war? Be creative, your plans do not have to be realistic, only specific. 10 sentences minimum.No links janet bought a dress for $245. she recived a 15% discount vecause she is a loyal customer. in addition she recived another 10% off. calculate janets final bill what surface features on mars today indicate that there was significant water erosion in the past? Helpppppppppppp again pleaseeeeee help me answer this question?? Assume that Aye is guilty of this crime. What can explain why he waited so long to do it? After all, by waiting 9 years, Aye would have given Tut time to have a son (or several sons), and he would have given the people enough time to forget the resentment they felt towards Tut's father. Suppose the standard deviation of X is 6 and the standard deviation of Y is 8. Answer the following two questions, rounding to the nearest whole number. What is Var[3X - 7Y] if the covariance of X and Y is 2? The current stock price of Alcoa is $25, and the stock does not pay dividends. The instantaneous risk-free rate of return is 4%. The instantaneous standard deviation of Alcoco's stock is 30%. You want to purchase a put option on this stock with an exercise price of $30 and an expiration date 30 days from now. According to the Black-Scholes OPM, you should hold __________ shares of stock per 100 put options to hedge your risk.