When S strain bacteria were killed by being heated to 60C, then mixed with live strain bacteria and injected into mice, a greater % of
mice died than when the strain bacteria were heated to 100C. Can you propose an explanation for these observations?

Answers

Answer 1

Answer:

Due to live strain bacteria.

Explanation:

The first method cause more damage to the mice as compared to the second method because in the first method the killed bacteria were mixed with the live strain bacteria. This live strain bacteria causes diseases in the mice and eventually killed the mice while on the other hand, all the bacteria were killed due to very high temperature so that's why first method causes more damage than second one.


Related Questions

These are two types of crust that make up the Earth's surface. A lithosphere and asthenosphere b convection and mantle c continental and oceanic d lithosphere and continental

Answers

Answer:

C. Continental and Oceanic

Explanation:

(did this stuff last year)

C. Continental and Oceanic

Please give brainliest!

What causes stomach cramps?​

Answers

Answer:

the main causes are, infection,abdominal growth,inflammation,obstruction blockages

Explanation:

“Stomach cramps” is a general term that refers to sharp, intermittent contractions or feelings of pain or discomfort that occur anywhere in the abdomen between the lower chest and the pelvis or groin. The abdomen consists of many organs, including the stomach, intestines, liver, gallbladder, pancreas, esophagus, and numerous blood vessels.

Stomach cramps are a common symptom of a wide variety of mild to serious diseases, disorders and conditions that are often related to the abdominal organs and sometimes the pelvic organs, such as the uterus and bladder. Most people will experience stomach cramps at some point during their lifetime, and they can occur in any age group or population. Common causes of stomach cramps include indigestion, gastroenteritis, menstrual cramps, bladder infection, and excessive flatulence (gas).

Stomach cramps may be generalized, which means they occur throughout the abdomen. Stomach cramps may also be localized in a small area of the belly, such as the lower abdomen or pelvis near the groin, or in the upper abdomen where the stomach is located.

Depending on the cause, stomach cramps can last for a few minutes or hours, such as when they occur from indigestion due to eating rich food or from vigorous exercise. Stomach cramps can also last for a few days, such as when they are due to a menstrual period. Long-term stomach cramping may be continuous or occur periodically and may be due to more serious conditions, such as colorectal cancer.

In some cases, stomach cramps may be caused by serious conditions, such as food poisoning or colorectal cancer. Seek prompt medical care if your stomach cramps are unexplained, persistent, or cause you concern.

Stomach cramps may accompany other symptoms, which vary depending on the underlying disease, disorder or condition. If you have other symptoms along with stomach cramps, be sure to inform your health care provider. This information will help your doctor diagnose the reason for your stomach cramps.

( I hope this was helpful ) >;D

A researcher prepares a suspension of mitochondria from tissue and monitors the respiration of the mitochondria by the rate of oxygen (O2) consumption in the presence of pyruvate. When the researcher adds an inhibitor of isocitrate dehydrogenase to the suspension, oxygen consumption (respiration) stops.

Answers

Answer and explanation:

The mitochondria are the organelle responsible for respiration, which leads to the production of ATP - the most important molecule in energy transfer.

For respiration to happen, there are several processes involving chemical reactions that take place in the mitochondria. These mechanisms are: oxidative decarboxylation, Krebs cycle, and oxidative phosphorylation. Glycolysis is also important for these processes to occur, but this particular case happens outside of the mitochondria.

Pyruvate is an important precursor of the Krebs cycle, also called 'the citric acid cycle'. The researcher observes the functioning of the mitochondria in presence of pyruvate, but then adds an inhibitor of isocitrate dehydrogenase. This inhibitor cancels out the action of the isocitrate dehydrogenase, which is a key enzyme in the Krebs cycle. By inhibiting this enzyme, the cycle cannot continue, and respiration stops.

To produce a valid test, the survey questions do not have to relate to the subject of the study?

Answers

False, it has to be related to the subject study.

The term genotype refers to

Answers

Answer:

In a broad sense, the term "genotype" refers to the genetic makeup of an organism; in other words, it describes an organism's complete set of genes. In a more narrow sense, the term can be used to refer to the alleles, or variant forms of a gene, that are carried by an organism.

Explanation:

A farmer uses genetic engineering to inject dairy cows with a genetically altered hormone (GAH) to result in the production of more milk. What might be a risk of using this technology to produce milk?
A.
Use of the GAH may increase the availability of milk.
B.
Use of the GAH may increase the amount of hormones in the milk.
C.
Use of the GAH may provide extra milk to feed the poor.
D.
Use of the GAH may allow the farmer to reduce milk prices.

Answers

Answer:

B

Explanation:

A farmer uses genetic engineering to inject dairy cows with a genetically altered hormone (GAH) to result in the production of more milk, and the use of the GAH may increase the amount of hormones in the milk, which is a risk that is present in Option B.

What is a genetically altered hormone(GAH)?

The GAHs that are used in dairy farming can result in an increase in the levels of hormones such as insulin-like growth factor 1 (IGF-1) in the milk, and these hormones can be harmful to human health and are also associated with an increased risk of certain cancers, such as breast cancer and In addition to concerns about the health effects of GAHs, there are also environmental concerns. The increased milk production resulting from GAH use can lead to overproduction, and animals get harmed by these genetically altered hormones.

Hence, the use of the GAH may increase the amount of hormones in the milk, which is a risk that is present in Option B.

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*Which of the following is a genotype? Mark all that apply.
Blue eyes
Brown hair
Tt
White flowers

Answers

Answer:

Tt

Explanation:

Genotypes are genetic characteristics of an organism. Phenotypes are physical characteristics of an organism. Having blue eyes and brown hair are both phenotypes, including white flowers. When you’re talking about genotypes, you’re referring to WHAT genotype a phenotype is. For example, the genotype for the white flower is rr, and the genotype for the pink flower is Rr. Tt is the only answer that’s considered a genotype.

Hope it helps. ^w^

What would the DNA nucleotide sequence be if the following DNA strand was Replicated?
ATGGGACTCA

Answers

Answer:

Dideoxynucleotides are chain-elongating inhibitors of DNA polymerase, used in the Sanger method for DNA sequencing. They are also known as 2',3' because both the 2' and 3' positions on the ribose lack hydroxyl groups, and are abbreviated as ddNTPs.

Explanation:


TACCCTGAGT I think

I solved using the fact that A <—> T and G <—> C. The reason for this is that the Adenosine sugar bonds best to thymine and the guanine sugar bonds best to cytosine.

Every copy of a particular protein manufactured by a cell shows the same incorrect amino acid at the same point in its structure. According to the central dogma of molecular biology, in which structure does this error originate?
1. mRNA
2. DNA
3. tRNA
4. rRNA

Answers

Answer:

Dna

Explanation:

I had this on a test and this was the answer

According to the central dogma of molecular biology, DNA does this error originate.

What are the functions of DNA?

Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix.

DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins.

DNA is made of nucleotides. A nucleotide has two components: a backbone, made from the sugar deoxyribose and phosphate groups, and nitrogenous bases.

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A student graphed distance versus time for an object that moves 14 m every 2 seconds. What is the slope of the ling on the graph. Please explain!

Answers

Answer:

A slope of 7, representing a speed 7 m/s.

Explanation:

Speed is defined as the distance traveled over time. Mathematically, it's calculated with the equation:

[tex]speed = \frac{distance}{time}[/tex]

Slope of a graph is the rate at which the y and x axis change together, the "rise over the run." Slope can be simply calculated using this equation:

[tex]slope = \frac{x_{2} - x_{1}}{y_{2} - y_{1}}[/tex]

Therefore, when graphing distance versus time, the change in distance is divided by the change in time to find the slope. This is the same as speed.

Los procesos de respiración aerobia celular y fotosíntesis, procesos considerados indispensables para la vida en la tierra, de los que es correcto afirmar que Son de carácter antagónico, es decir el cloroplasto ejecuta reacciones anabólicas y la mitocondria catabólicas. La respiración celular sólo la realizan los seres eucariotas del reino de los vegetales. Ambos son realizados por los seres considerados eucariotas. Ambos son realizados por eucariotas pertenecientes al reino de los vegetales

Answers

Respuesta:

Las opciones correctas son: a) son de carácter antagónico, es decir el cloroplasto ejecuta reacciones anabólicas y la mitocondria catabólicas; y d) ambos son realizados por eucariotas pertenecientes al reino de los vegetales.

Explicación:

La fotosíntesis y la respiración celular son procesos de carácter antagónico porque la fotosíntesis es anabólica y la respiración celular es catabólica. La fotosíntesis consiste en la producción de moléculas complejas a partir de moléculas simples (proceso anabólico), mientras que en la respiración celular se degradan moléculas complejas y se las convierte en moléculas más simples (proceso catabólico).

Ambos procesos son realizados por los eucariotas del reino de los vegetales, pero los eucariotas del reino animal sólo realizan respiración celular, ya que no tienen cloroplastos. Esta diferencia tan importante existe porque los animales pueden moverse para conseguir comida (heterótrofos), mientras que los vegetales necesitan producir sus propios nutrientes haciendo uso de la fotosíntesis (autótrofos). Más allá de esta diversidad, todos los eucariotas realizan respiración celular para producir energía en forma de ATP.

As the skin ages, it loses its ability to restore its shape due to a:

decrease in collagen.

decrease in hormones.

decrease in keratin.

decrease in elastin.

Answers

Answer:

The answer is decrease in elastin

Answer:

D

Explanation:

EDGE2021

How are these atoms used to make new molecules and what types of molecules are made? Where does the energy come from to produce these new molecules?

Answers

Answer:

Atoms used energy to make new molecules.

Explanation:

Atoms used energy to make new molecules through making bonds with one another because bonds allow atoms to attached tightly with each other. The energy come from the external environment in order to produce new molecules. So we can conclude that energy is the main ingredient needed for making new molecules and this energy is gained from the environment.

Answer:

I would like to help, but what are the new molecules they are producing? And what are the atoms the question is talking about?

Does mitosis or meiosis create body cells?

Does meiosis or mitosis creat sex cells?

Answers

Answer: mitosis creates body cells and

Meiosis creates sex cells

Explanation:

What are carbohydrates dissolved into the bloodstream as?
1 Sucrose
2 Fats
3 Glucose
4 Dextrose

Answers

Answer:

glucose

Explanation:

Answer:

3 Glucose

Explanation:

can someone pls help me with this

Answers

Answer:

t= log2(2048)

The logarithm is the inverse function to exponentiation. That means the logarithm of a given number x is the exponent to which another fixed number, the base b, must be raised, to produce that number x. In this case:

[tex] {t}^{2} = 2048[/tex]

[tex]t = \sqrt{2048} = 45.3h[/tex]

At the site of a wound, platelets release chemicals that start a chain reaction to produce _____. A. Hemoglobin. B. Fibrin. C. Lymph. D. Plasma

Answers

Answer:

C

Explanation:

The Cell TheoryThe smallest living things are one-celled or ____+_______________Large organisms contain millions of cells. They are many-celled or _________________ ____________________________.All of the organism's life functions are carried out by cells or parts of cells.Cells develop from other living cells – not from nonliving matter.

Answers

Answer:

unicellular; multicellular

Explanation:

The smallest and the most basic unit of life is the cell. Living organisms that are made of just one cell are said to be unicellular while those that are made up of multiple cells are said to be multicellular. Many unicellular organisms are some of the smallest living organisms to exist in nature. They cannot be seen with the ordinary eyes, except with the aid of microscopes.

PLEASE HELP ME FILL IN THE BLANKS ASAP!!!!!!!!!!!!!! GIVING AWAY 18 POINTS!!

Answers

1. D. Marine

2. A. Desert

3. E. Freshwater

4. C. Grassland

5. B. Tundra

If there is a #6, then the answer would be F. Tropical rainforest

CAN SOMEONE HELP ME PLEASE!! 100 POINTS!!! NO COPYING AND PASTING!!!! IN 4 PARAGRAPHS PLEASE!!!

How are Earth's structures created over time?

Answers

Answer:

Earth crust is constantly changing primarily due to plate tectonics (plate motion), but it also changes from activity on the surface from river, man made and meteorite impact. ... Continents and oceans do not ride atop the plates without changing. As the plates move and change so do the continents and oceans

Answer:

Explanation:

Earth's structures were created when the planet was first formed. Over time, its own gravitational and magnetic forces drove the Earth's core rotation.  Other geological activities affected its structures; such as glacial movements, tectonic plates collisions and submersion, volcanic eruptions and so on. There were also major external events the asteroid impact that killed most lives on Earth. Human activities' impact on Earth's structures were relatively small until the recent centuries.

List and describe the six common morphologies

Answers

Explanation:

The basic morphologies are spheres (coccus) and round-ended cylinders (bacillus). But there may be others such as helically twisted cylinders (spirochetes), cylinders curved in one plane (selenomonads) and unusual morphologies (such as the square, flat box-shaped cells of the archaean genus Haloquadratum).

Answer to this question ?

Answers

herero is like Bb Aa bb or aa , so it’s 50% i believe

Answer:

[tex]\Large \boxed{\sf 50\%}[/tex]

Explanation:

[tex]X=Aa[/tex]

[tex]Z=bb[/tex]

Heterozygous is when an individual has two different alleles of a gene.

[tex]Heterozygous \rightarrow Aa,Aa,Bb,Bb[/tex]

[tex]\displaystyle \frac{no. \ of \ heterozygous}{total \ no.}=\frac{4}{8} =0.5[/tex]

which of the following most accurately describes the function of a vaccine​

Answers

Answer:

to protect you from getting an effaction

to protect you from getting from infection by pathogen is  accurately describes the function of a vaccine​

what are the types of vaccine ?

A vaccine can be defined as a biological preparation which provide an active acquired immunity to a specific infectious and transmissible disease.

A vaccine consist of an agent that has a similarity to the disease-causing microbe. Inactivated Vaccine are formed by inactivating a pathogen by applying heat or chemicals such as formaldehyde or formalin, it destroys the pathogen’s ability to replicate.

Attenuated vaccines are formed from different ways like passing the disease-causing virus through a series of cell cultures or animal embryos.

Toxoid Vaccine can be made by inactivating the toxin released from bacteria that causes disease symptoms, the organisms or viruses used in inactivated vaccines which can be done via treatment with a chemical such as formalin.

Subunit Vaccine use a part of a target pathogen to provoke a response from our immune system, which can be done by isolating a specific protein from a pathogen.

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Find the hypotenuse of a right triangle whose legs both have a length of 5.

Answers

Answer:

Hypotenuse = 7.07 units.

Explanation:

The sides of the right angle triangle are the opposite and adjacent side; which are both equal in this case.

Given the following data;

Opposite = 5 units

Adjacent = 5 units

To find the hypotenuse, we would use the Pythagorean theorem given by the formula;

Hypotenuse² = opposite² + adjacent²

Hypotenuse² = 5² + 5²

Hypotenuse² = 25 + 25

Hypotenuse² = 50

Hypotenuse = √50

Taking the square root of both sides, we have;

Hypotenuse = 7.07 units.

Help meeeeee, WILL GIVE BRAINLIESTTT. NEEED DONEEE

Answers

the picture is black

How is energy produced in the sun? Draw a diagram to explain the processes.

Answers

Answer:

hope it's help uu

Explanation:

if wrong then sry

Answer:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. During this process huge amount of energy is created.

If God created everything than what created God?

Answers

Answer:

Its best not to question and just believe that there is something at the end of our meaningless lives

Explanation:

Which of the following characteristics is shared by both primary and secondary consumers?

Uses the Sun’s radiant energy to produce food

The first step in any food chain diagram

Eats only plants to gain needed energy

Gains energy by eating other living things

Answers

Gains energy by eating other living thing

The characteristic that is shared by both primary and secondary consumers is that they gain energy by eating other living things. Therefore, option D is correct.

What are consumers in an ecosystem?

The primary consumers are the organisms that devour the producers. They are numerous and often modest in size. Herbivorous animals are the primary consumers (vegetarians). The organisms known as secondary consumers are carnivores that consume the primary consumers. Secondary consumers are consumed by tertiary consumers.

Herbivores, carnivores, omnivores, and decomposers are the four different categories of consumers in ecology.

The characteristic that is shared by both primary and secondary consumers is that they gain energy by eating other living things. Therefore, option D is correct.

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Persian cats often have certain diseases and disorders, especially of the eye and nose since their heads have an unusual shape. Persian cats were developed by artificial selection by humans.

Which of the following traits is deliberately selected for when breeding Persian cats?
A.
flat faces
B.
inherited diseases
C.
genetic diversity
D.
all of these

Answers

Answer:

the answer is A

Explanation:

It couldn't be D or C because you don't want to give your cat a diseases and so that means it couldn't be D which is all of the above.

Urgent !! Pls help!
why can an increase in glycon phosphorlase activity might result in an increase in o2 consumption in the cell

Answers

Answer:

The liver senses the concentration of glucose in the blood and takes up or releases glucose accordingly. The amount of liver phosphorylase a decreases rapidly when glucose is infused. After a lag period, the amount of glycogen synthase a increases, which results in the synthesis of glycogen.

Explanation:

Answer:

In muscle tissue, the ratio of phosphorylase a to phosphorylase b determines the rate of conversion of glycogen to gluco...

In muscle tissue, the ratio of phosphorylase a to phosphorylase b determines the rate of conversion of glycogen to glucose 1-phosphate. Classify how each event affects the rate of glycogen breakdown in isolated muscle tissue.

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