In the laboratory, yeast cells are usually grown at a temperature of 25oC. A scientist wanted to determine if yeast cells would reproduce faster or slower when the temperature was dropped to 15oC. The same number of yeast cells were placed in the same medium with the same amount of nutrients. One sample was kept at 25oC and the other one was kept at 15oC. The number of yeast cells was counted every hour for an eighteen hour period.

Answers

Answer 1

Answer:

This question is incomplete, however, it is asking to identify the following variables:

Independent variable: Temperature

Dependent variable: Number of yeast cells

Constants: same amount of nutrients, same number of yeast cells, same medium

Explanation:

- Independent variable is the variable that the experimenter changes or manipulates in order to bring about a measurable effect. In this experiment, the TEMPERATURE at which the yeast are kept is the independent variable.

- Dependent variable is the variable that responds to the changes made to the independent variable. It is the variable that is measured by the experimenter in the experiment. In this case, The NUMBER OF YEAST CELLS was counted, hence, it is the dependent variable.

- Constants are variables that are kept unchanged or same for all groups by the experimenter in order not to influence the experiment's outcome. In this case, the CONSTANTS are: same amount of nutrients, same number of yeast cells, same medium etc.


Related Questions

A student is presented with a model of a digestive system and is asked to remove one structure (small or large organ) that will have the largest impact on decreasing chemical digestion. Which structure should the student remove

Answers

Answer:

Small intestine

Explanation:

Digestion is the process of breaking down food molecules into simpler and usable forms by the body cells. The process of digestion involved the mechanical aspect and chemical aspect. The mechanical one deals with using physical means like chewing to break down the food particles.

However, the chemical one deals with the usage of chemically-secreted enzymes to work on the food molecules. Lots of digestive organs are involved in this chemical digestion, but, the most of chemical digestion takes place in the SMALL INTESTINE. The small intestine is where most of the chemical digestion occurs including absorption.

Hence, according to this question, the student should remove the SMALL INTESTINE because it will have the largest impact on decreasing chemical digestion.

4 ( 3x+10y=54 and x=y+5 )

Answers

Answer:

x−y=9 , x+y=6

4x+4y=1

, 6x−y=1

x2−y=2

, 2x−y=−1

Explanation:

What does a number in front of a molecular formula stand for???????

Answers

Explanation:

The small number behind each element symbol designates the number of atoms of each element in a chemical formula. If there is no number, it is assumed there is only one of those elements. A large number designates how many units there are of that compound.

Answer:

Element's number of atoms in a chemical formula

Explanation:

The small number behind each element symbol indicates each element's number of atoms in a chemical formula. If there is no number, it is assumed there is only one of these elements. A huge numeral in front of a compound designates whereby many units there are of that compound.

According to the base-pairing rules for DNA, which of the following statements
NOT true?
A always pairs with T
C always pairs with G
T always pairs with G
T always pairs with A

Answers

Answer:

T always pairs with A

Explanation:

I think so I'm super sorry if its wrong :)

According to the base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine, T is not paired with G, hence option C is correct.

What is base-pairing in DNA?

Because it is RNA, there is no complementary base pairing between the bases adenine and thymine in DNA. Uracil, which has a structure remarkably similar to that of thymine, is present in place of thymine.

Base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine structure of DNA is created by the binding of these base pairs

Although they keep the two strands of DNA together, they are not strong enough to withstand replication.

Therefore, the base pairing rule, guanine always forms a bond with cytosine, while adenine always pairs with thymine, hence option C is correct.

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what is the effect of glucagon?​

Answers

The effect of glucagon can get you nausea, vomiting, headaces, rhinorrhea and nasal pain.

Can you list some facts about Food webs.

Answers

Answer:

A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass.

Explanation: A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.

A food web is where is constants all food chains that are in a single echosystem

When humans dig-up fossil fuels and burn them to power the modern world, carbon flows between which two reservoirs of the carbon cycle? * A. Hydrosphere and biosphere B. Geosphere/lithosphere and atmosphere C. Atmosphere and biosphere D. Hydrosphere and geosphere/lithosphere

Answers

Answer:

B

Explanation:

When humans dig-up fossil fuels and burn them to power the modern world, carbon flows between the Geosphere/lithosphere and the atmosphere.

Both the geosphere and the atmosphere represent important reservoirs of carbon. The digging-up of fossil fuels, otherwise known as exploration, is carried out in the geosphere or the lithosphere part of the earth. For example, crude oil is obtained deep from the ground. When the fuels are burned, they release carbon in the form of carbon dioxide into the atmosphere.

Hence, it can be concluded that carbon flows from the geosphere/lithosphere part of the earth to the atmospheric portion of the earth when fossil fuels are burned.

The correct option is B.

How does industrial gases pollute atmosphere explain?

Answers

Industrial gases contains carbon dioxide.

Such as  Dust, smoke released from industries caused by air pollution

Draw a picture or write a sentence using these words to show how they are related.
DNA, Trait, Alleles, Protein, Genes

Answers

Answer:

DNA

Explanation:

PLEASE GIVE ME A HEART

Condensation occurs in clouds. Explain how and then explain what happens with the clouds gain too
much condensation

Answers

When clouds condensate too much, the water pulls the cloud down and it starts to rain.

Which provides the most direct source of energy for a hurricane?
O warm ocean water
O rising, swirling winds
O heating of the air by the sun
O friction with the ground

Answers

warm ocean water will the answer
warm ocean water

You have to be near a large ocean of water to form a hurricane. winds will not do enough to make one

Which researcher theorized that hypnosis comes about as a form of roleplay between hypnotist and subject?
A. Ernest Hilgard
B. Theodore Sarbin
C. Theodore Barber
D. Milton Erickson
Please select the best answer from the choices provided
А
B
Ο Ο Ο Ο
С
D
Save and Exit
Next
Submit
Mark this and return

Answers

Answer:

D. Milton Erickson

Explanation:

Just took the test! Please mark me the Brainliest! peace and love

Milton Erickson is the researcher who theorized the hypnosis that comes out form the roleplay of the hypnotist and subject.

He has dedicated his life to the field of hypnotism and is committed to scientific methodology.

He was one to specialize in hypnosis and family therapy.He is noted for his approaches in the uncoinsuous mind.Hence the option D is correct.

Learn more about the that hypnosis comes about as a form.

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100 POINTS!!!! I WILL GIVE BRAINLIEST TO WHO ANSWERS CORRECTLY!!!!!!!!!!!!

Please give a food web for a blue viper

Answers

Answer:

i think mice

Explanation:

please give brainliest

what is an outcome of lack of oxygen?​

Answers

Answer:

Blood carries oxygen to the cells throughout your body to keep them healthy. Explanation:

Hypoxemia can cause mild problems such as headaches and shortness of breath. In severe cases, it can interfere with heart and brain function. Hypoxemia that causes low oxygen levels in your body's tissues is called hypoxia.

The outcome of lack of oxygen To maintain your body's cells healthy, blood provides oxygen to every cell.

What is cell ?

The smallest unit that can sustain life on its own and makes up all living things, including the body's tissues. The cell membrane, the nucleus, and the cytoplasm are the three primary components of a cell. The substances that enter and leave the cell are governed by the cell membrane, which encloses the cell.

There are two different types of cells: prokaryotic cells, which lack a nucleus but still have a nucleoid area, and eukaryotic cells, which have a nucleus. Eukaryotes can either be single-celled or multicellular, in contrast to prokaryotes, which are single-celled organisms.

From bacteria to humans, cells give all living things their structure and functionality. They are regarded as the tiniest form of life by scientists.

Thus,  To maintain your body's cells healthy, blood provides oxygen to every cell.

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The mass of a proton is the same as the mass of a neutron

True or false

Answers

Answer:

This statement is true.

Explanation:

Both protons and neutrons have a mass of one.

Hope this helps :)

Answer:

The proton and neutron have similar mass with the mass of the neutron slightly larger than that of the proton. Each of these particles has a mass approximately 1800 times greater than that of an electron. ... The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element

What is a Metamorphic Rock?

rock that forms when existing rock changes to a new rock because of heat and pressure


rock that forms by the process of compaction and cementation of sediments


rock that forms when melted rock (magma, lava) cools and hardens


pls help

Answers

Answer: A) rock that forms when existing rock changes to a new rock because of heat and pressure ..hope this helped!

Explanation:

HELPPPP pls I need answer fast like flash

Answers

Answer:

and im here hi

Explanation:

was i fast enough?


Describe the movement of water if cells are in a hypertonic solution, hypotonic solution, and isotonic solution.
Why?

Answers

Water molecules move inside the cell in a hypotonic solution causing it to swell


Water molecules move outside the cell in a hypertonic solution causing it to shrink


Water molecules in an isotonic solution does not move inside or outside the cell and the cell’s volume will remain stable

Pls can someone help me out by answering these

Answers

Answer:

the diagram is not clear enough.

Answer:

A,C,D

Explanation:

a population of 100 insects that live in an area 100 square meters has a density of 1 insect per square meter. what’s this an example of?

Answers

population density...?

The answers to these questions ?

Answers

Answer:

1. Lactose, H2O, and lactase.

2. Galactose and glucose.

3. You converted lactose, H2O, and lactase into galactose and glucose.

Explanation:

I don't know about the last one so I would do that one yourself because we can't see what the reaction was from.

Weak hydrogen bonds between the nitrogenous base pairs hold the two strands of DNA together. Why are the strands held together by weak hydrogen bonds instead of covalent bonds

Answers

Answer:

Explanation:

Hydrogen bonding is usually occur wen interaction with hydrogen atoms occur.

Hydrogen bonds joins DNA polymers because an hydrogen atom occur on on one base which is called hydrogen bond donors and another oxygen or nitrogen atoms on the base across from it which is called hydrogen bond acceptors.

Adenine “A” a purine and Thymine “T” a pyrimidine each have a donor and one acceptor, whereas Cytosine “C” a pyrimidine has one donor and two acceptors, and Guanine “G” a purine has one acceptor and two donors.

This atoms allows for hydrogen bond between them that gives them structure of DNA molecule.

A nucleotides is hydrogen bonded to T nucleotides while C nucleotides is hydrogen bonded to G nucleotide this is called complementary base pairing.

Which action is harmful to organisms living in water ecosystems

Answers

general pollution! as well as cultural eutrophication! could be harmful to water ecosystems and are in fact the most prominent reason. pollution could include excess fertilizer run off going into a creek. the nitrogen and phosphorus will create a perfect environment for algae and bacteria. thus leading to cultural eutrophication.

3. Autotrophs that convert light energy into chemical energy is called
a. photoautotrophs
b. heterotrophs
c. chemoautotrophs
d. omnivores

Answers

Answer:

A) Photoautotrophs

Explanation:

Tbh Im not entirely sure but photo means light and it seems like the most likely answer

PLEASE ANSWER QUICK>>>>>Explain how enherited traits are determined

Answers

Answer:An inherited trait is one that is genetically determined. Inherited traits are passed from parent to offspring according to the rules of Mendelian genetics. Most traits are not strictly determined by genes, but rather are influenced by both genes and environment.

Explanation:

Where would you expect a maritime tropical air mass to originate?

Answers

Answer:

Maritime tropical air masses originate over the warm waters of the tropics and Gulf of Mexico, where heat and moisture are transferred to the overlying air from the waters below.

Explanation:

Question 4(Multiple Choice Worth 5 points)
(LC)
What was one conflict that was resolved in the resolution?
The characters learned to respect each other enough to discuss why the boy tried to grab the purse.
Mrs. Jones took care of the boy's hunger.
The boy asked for the money to buy shoes.
Mrs. Jones taught the boy to have manners.
The answer is the boy asked for money

Answers

Answer:

The characters learned to respect each other enough to discuss why the boy tried to grab the purse.

Explanation:

In the short story "Thank You, Ma'am" by Langston Hughes, a young, hungry boy was about to rob a woman of her purse. But as circumstances would turn out, he was unsuccessful in that attempt but then learned a valuable lesson from the very woman he had targeted.

One conflict that was resolved in the resolution was that both of the characters, Mrs. Luella Bates Washington Jones and Roger, learned to respect one another. By her act of inviting him to her home and preparing food for him, Roger also came to respect and trust the woman. It was this faith that helped them discuss the events that led to Roger's failed attempt of robbing Mrs. Jones, and Roger left the house with a sense of appreciation and a change of heart.

Thus, the correct answer is the first option.

Please help It is making me cry

Answers

Answer:

What are you supossed to be doing

Explanation:

Answer:

Can you give me the answers?

Explanation:

PLEASEEEEE HELP!! TY
1. What is the overall purpose of mitosis and meiosis?
2. Why is it important that DNA is replicated prior to cell division?
3. How are normal cells and cancer cells different from each other?
4. Describe mistakes that can occur during the cell cycle and cause human disorders.

Answers

Mitosis aims to create daughter cells that are completely genetically similar to their mothers, with no extra or less chromosomes. In contrast, meiosis serves a single function in the human body that is the creation of gametes.

What is cell division?

The process by which a parent cell divides into two daughter cells is known as cell division. Cell growth and chromosome replication precede cell division, which often happens as part of a longer cell cycle.

Before dividing, cells must copy their DNA. This promotes successful inheritance of genetic features by giving each daughter cell a copy of the genome.

Grow in the absence of signals instructing them to do so in cancer cells. Only when they get such signals do normal cells expand. Disregard cues that would typically instruct cells to cease dividing or die.

Aneuploidy is a condition when there are either too many or too few chromosomes in the daughter cells produced during mitosis.

Thus, this is the overall purpose of mitosis and meiosis.

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1. The overarching goal of mitosis is to ensure cell division and the transfer of genetic material to daughter cells for tissue repair, growth and development.

2. To maintain genetic integrity, DNA replication is necessary prior to cell division.

3. Cancer cells have uncontrolled growth, escape cell death and lack contact inhibition, whereas normal cells have controlled cell division, experience programmed cell death and show contact inhibition.

4. The disorders in humans can result from errors in the cell cycle. Diseases such as Down syndrome are caused by abnormal chromosomes. Gene changes can affect the development of cancer.

Meiosis produces gametes for sexual reproduction, while mitosis assures cell division for growth, development, and tissue repair. Accurate transmission of genetic information and preservation of genetic integrity in daughter cells depend on DNA replication prior to cell division.

Whereas cancer cells have uncontrolled proliferation, escape from cell death, and lack contact inhibition, normal cells have regulated division, programmed cell death, and appear to have contact inhibition. Human disorders such as chromosomal abnormalities (such as Down syndrome), gene mutations that cause cancer, errors in DNA replication or repair that cause genetic disorders, and cell cycle control that leads to uncontrolled cell division and tumor formation, all of which Mistakes made during this can have consequences. cell cycle.

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Why does the body produce more urine on a cold day rather than a hot day if the same amount of
water is consumed?

Answers

Explanation:

During summer when the surrounding temperature is high, we lose water in the form of sweat, direct evaporation considerably. Hence kidneys retain water for maintaining fluidity of the blood and less urine is formed.

But during winter, the surrounding temperature will be very low. There will not be any sweating, no evaporation losses. Moreover to keep the body temperature constant, the blood capillaries in the skin get constricted and the blood pressure is increased. The result is that our body gets warmed up. In order to maintain the blood pressure normal, the excess water along with the wastes is excreted mostly in the form of urine. This is the reason for more urine out put and frequent urination under very cool conditions and in winter.

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