what happened when Griffith mixed heat-killed bacteria with the harmless culture of bacteria?
PLEASE HELP!!!!!!!! ASAP!!!!!
Answers
Answer:
C.
Explanation:
the heat-killed bacteria had passed their disease causing ability to the harmless strain
Related Questions
How many chromosomes make us human?how many chromosomes do we get from each parents
Answers
Answer:
46, 23 from each
hope this helps!
Answer:
A human typically has 46 chromosomes. They receive exactly half from each parent, therefore they receive 23 chromosomes from each parent since half of 46 is 23.
What has to happen befor a cell can divide?
A: DNA has to double
B: DNA has to unwind
C: Chromosomes need to form
D: None of the above
Answers
Hope this helps!!!:)
Answer:
A: DNA has to double
Explanation:
In the process of every cell division, the cell must double "replicate" its chromosomal DNA in the process.
A student conducted an investigation to determine the effect of water temperature on
the amount of sugar that dissolves in a beaker of water. Identify components for trial 1
of this investigation.
Trial 1
Terms
Variable
Beaker
Number
1
2
3
4
Amount of
Water (mL)
100
100
100
100
Temperature of Temperature of Amount of Sugar
Sugar (°C) Water (°C) Dissolved (9)
20
5
185
20
10
189
20
15
194
20
20
204
Constant
Answers
The given question provided the data of an experiment to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water and asked to identify the components:
Amount of Water (mL) - constantThe temperature of Amount of Sugar - constantThe Temperature of water (°C) - variableAmount of Sugar dissolved (g) - variableIn any research investigation or experiment, there are three main parts that are:
Independent variable: These are the variables that are manipulated or change to see the effect on the dependent variable, these are manipulated by the researcher. In this investigation, the independent variable is the temperature of the water as it affects the amount of sugar that dissolves.Dependent variables: these are the variable that also changes due to change and according to the change in the independent variables. In this investigation, the amount of sugar that dissolves changes according to the change in the temperature of the water, thus, its dependent variable.Constant or control: these are the parts that do not change during the experiment so there is no other influence occur in the Dependent variable.Thus, the correct answer is -
Amount of Water (mL) - constantThe temperature of Amount of Sugar - constantThe Temperature of water (°C) - variableAmount of Sugar dissolved (g) - variableLearn more about independent variables:
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how does bacteria become immune to antibiotics? (short answer)
Answers
pancreatic amylase is a digestive enzyme that digests starch in the small intestine. pancreatic amylase's optimum pH is slightly basic, which the presence of NaHCO3 provides. indicate which test tubes (1-3) would show digestion of starch following incubation. Explain why the others would not.
Tube 1 = water, starch
Tube 2 = water, starch, pancreatic amylase, HCI
Tube 3 = water, starch, pancreatic amylase, NaHCO3
Answers
Answer:
Tube 3
Explanation:
Pancreatic amylase's optimum pH is basic, NaHCO3 is a base so it will provide the optimum pH for the enzyme to catalyse the breakdown of starch.
In tube 1 there will not be the breakdown of starch as there simply isn't any enzyme to break it down.
In Tube 2, the enzyme pancreatic amylase will most probably become denatured (loss of shape), as HCl is acidic which causes it to lose shape causing a change in the active site and will never be able to catalyse the breakdown of starch.
Hope this helps :)
What are scientists?
Explain
Answers
Answer:
a person who studying or has expert knowledge of one or more of the natural or physical sciences
hope it can help you
Hey! real question for the women and girls,
anyone know how to get rid of strong fishy oder "down there"? My little sister is becoming a woman and I never had a big problem with the oder but she does sadly! She needs some help, I know tea used as a wash and probiotics help, but anything else? :D thank you ladies! And some points for ya'll
Answers
Answer: it helps to get soaps and washes that are specificly for that area also change in diet, like drink more water and eat more vegatables
Explanation:
A room has a stereo with two speakers. At one location in the room, the sound from the speakers is very quiet. What is causing this effect? A. Constructive interference B. Destructive refraction OC. Constructive refraction D. Destructive interference
Answers
Because:
When waves are interfering with each other destructively, the sound is louder in some places and softer in other places and wave interaction is called inference
which of the following cell types would have full complementary number of chromosomes?
a. haploid cell
b.somatic cell
c.gamete
d. sperm
Answers
helpp a biology quiz
Answers
HELP!!! why is land considered a resource??
Answers
Scientists have determined that the shape of the DNA molecule is?
Answers
Answer:
Double helix
Explanation:
Answer:
it is Double helix that's what we wrote today
Can rocks melt from heat?
A. Yes
B. No
Answers
Answer:
A
Explanation:
They become magma
NEED HELP PLEASE as soon as possible!!!!!!!!!!
Which statement best explains the genetic variation that results from sexual reproduction?
A. Each chromosome contains many different genes.
B. Offspring receive genes that are exactly the same as one parent's genes
C. Offspring receive a mix of genes from two different parents.
D. Each chromosome contains many copies of the same gene.
Answers
Answer:
C. Offspring receive a mix of genes from two different parents.
Explanation:
A pedigree is shown above that tracks a trait through four generations in a family. Based on the inheritance patterns of this trait, which statements accurately justify that this is a sex-linked recessive trait? Select all that apply.
A) Individuals 1-1 and 11-4 are carriers.
B) The trait is passed from fathers to sons.
C) Males are being affected more frequently than females.
D) The trait is expressed on a chromosome other than the X or Y.
E) The trait appears in later generations after being absent in one generation.
Answers
Answer:
The answer above is only one of the answers. The answers are A, C, and E! I did the USATestPrep and those were the answers. Mark as brainliest plz!
Explanation:
Which of the following molecules is synthesized at specific times during the cell cycle and
forms an active complex with a kinase?
A)PDGF
B)MPF
C)Cdk
D)cyclin
Answers
Answer:
D. Cyclin
Explanation:
Cyclins drive the events of the cell cycle by partnering with a family of enzymes called the cyclin-dependent kinases (Cdks). A lone Cdk is inactive, but the binding of a cyclin activates it, making it a functional enzyme and allowing it to modify target proteins.
Cyclin is synthesized at specific times during the cell cycle and forms an active complex with a kinase.
The phases of the cell cycle are directed by a highly complex and finely regulated protein interaction network.
Among these proteins, the phosphorylating enzymes called cyclin-dependent kinases (CDKs) and their activating subunits the cyclins (A, B, D and E) stand out.
The cyclin-dependent kinases undergo phosphorylation on their amino acids (serines and threonines).The cyclins (so called because they appear and disappear throughout the cycle), bind to the CDKs and control their phosphorylation reactions.The cyclic assembly between these two compounds, cyclins and CDKs, their activation and disassembly are the central processes that direct the cell cycle.Therefore, we can conclude that cyclin is synthesized at specific times during the cell cycle and forms an active complex with a kinase..
Learn more here: https://brainly.com/question/1158654
where the copying of
the DNA molecule begins.
Answers
Answer:
DNA replication initiates at specific points, called origins, where the DNA double helix is unwound. A short segment of RNA, called a primer, is then synthesized and acts as a starting point for new DNA synthesis.
Explanation:
Answer:
Origins of replication
Explanation:
hope this helps!
Explain TWO reasons why it is important to develop alternatives to fossil fuel
energy sources,
Answers
2. They are not an unlimited resource and could run out at any minute. If they run out and we don’t have an alternative, we could be in a world of hurt.
Identify the chromatids and the centromere of a chromosome.
Answers
Answer:
Chromatid refers to one half of the chromosome. Centromeres are the center of the chromosomes, where spindles attach during mitosis.
Describe two problems that occur when a human population grows.
Answers
Answer:
Explanation:
The exponential growth of the human population could lead to food shortages, global warming, and other issues of resource scarcity.
Answer:
Explanation:
Unsustainable population growth and lack of access to reproductive health care also puts pressure on human communities, exacerbating food and water shortages, reducing resilience in the face of climate change, and making it harder for the most vulnerable communities to rise out of intergenerational poverty.
which of the following is NOT a way in which a lake can become a
forest? *
A. The plants are eaten by many animals.
B. Dead leaves settle to the bottom.
C. The soils dry out.
D. The lake is filled with sediment.
Answers
Answer: A. The plants are eaten by many animals.
Explanation:
Help! Science work!!
Answers
(Don’t mind this gei ixjdhheusudhehshhd)
Which of the following is linked to an increase in brain size and intelligence in hominids?
options:
Increased social interactions
Development of more complex and tools and language
Decreased use of tools and language
Increased speed and strength
Answers
Answer: b
Explanation: I took the test
The illustration shows a model of the transport of solute particles from outside the cell to inside the
Inside of cell
Protein pump
High concentration
Low concentration
Energy
Outside of cell
What type of cell transport is modeled?
A
The model illustrates active transport because energy is required for solute particles to
cross the cell membrane,
0
B. The model illustrates diffusion because solute particles are moving from an area of higher
concentration to an area of lower concentration
C. The model illustrates facilitated diffusion because protein channels allow solute particles
to cross the cell membrane.
D. The model illustrates osmosis because water molecules are moving from an area of higher
concentration to an area of lower concentration,
Answers
Answer:
A. The model illustrates active transport because energy is required for solute particles to cross the cell membrane.
Explanation:
Active transport is the transport of molecules from a region of lower concentration to a region of higher concentration. In other words, movement occurs against a concentration gradient.
Due to this, it requires energy in form of ATP for this movement to occur. Hence, based on this question, the model illustrates active transport because energy is required for solute particles to cross the cell membrane.
How does soil composition affect the number and types of organisms an environment can support?
(Biome majors)
Answers
Answer:
The number of organisms an ecosystem can support depends on the resources available and abiotic factors, such as quantity of light and water, range of temperatures, and soil composition. Given adequate biotic and abiotic resources and no disease or predators, populations (including humans) increase at rapid rates.
all living organisms have DNA. That DNA is made of the same building blocks(nucleotides). what does this evidence suggest?
Answers
Which hormone causes the endometrial layer inside the uterus to thicken?
A. luteinizing hormone
B. estrogen
C. testosterone
D. progesterone
I’ll give brainiest:)
Answers
Answer:B
Explanation:Estrogen causes the lining to grow and thicken to prepare the uterus for pregnancy. In the middle of the cycle, an egg is released from one of the ovaries (ovulation). Following ovulation, levels of another hormone called progesterone begin to increase.
I NEED THESE ANSWERED PLEASE
What causes the flu?
What are common symptoms of the flu and what are complications that arise from the disease?
Do you think people can misdiagnose themselves with the flu? Explain your reasoning.
How is flu season defined? What are the criteria for this definition?
How does the flu affect businesses and governments? Could it affect residents’ access to certain resources?
Answers
Explanation:
1) The flu is caused by influenza viruses that infect the and people assume it's the flu because nose, throat, and lungs. These viruses spread when people with flu cough, sneeze or talk, sending droplets with the virus into the air and potentially into the mouths or noses of people who are nearby.
2)
Difficulty breathing or shortness of breath.Persistent pain or pressure in the chest or abdomen.Persistent dizziness, confusion, inability to arouse.Seizures.Not urinating.Severe muscle pain.Severe weakness or unsteadiness.Fever or cough that improve but then return or worsen.3) yes because they don't always know signals can have symptoms as others and they assume it as flu because it is a known sickness
4)The flu, also known as the influenza virus, is diagnosed year-round in the United States. Fall and winter seasons are when the greatest impact is usually seen and, therefore, is considered the "flu season." Influenza activity has a period of greatest activity between December and February, but the activity can last until May.
Every year at the beginning of the fall season, people are encouraged to get a flu shot.
CDC data on influenza vaccine:
• 116 million doses of influenza vaccines have been distributed.
CDC
(Centers for Disease Control and Prevention) recommends that all persons 6 months and older receive the influenza vaccine at the end of October.
• Influenza vaccination offers important benefits
5) in the attached file
A flu is a common viral infection that can be deadly if not treated on time. This is caused by the influenza virus. The common symptoms include fever, chills, muscle aches, cough, fatigue and runny nose.
What is Flu?
Flu is a viral infection caused by the Influenza virus. This is a communicable disease. The flu virus attacks the lungs, nose and throat. The respiratory system is weakened. People who have a weak immune system or have a chronic disease are more prone to flu infection.
The most common symptoms include chills, fever, headache, muscle aches, runny nose, cough and fatigue. People generally diagnose flu when they are having respiratory illness which doesn't always supposed to be flu. This misdiagnosis can complicate the situation which makes the treatment of infection difficult.
Flu season is an annually recurring period. The season occurs when its half cold in each hemisphere.
Flu is a communicable disease which lasts for approximately two-three days. During this period, an affected person is advised to stay away from other healthy people which interferes with the business and government work. Also, the residents are not advised to go in public which affects their access to certain resources.
Learn more about Flu here:
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#SPJ2
Can you answer 5 and 6?
Answers
6) D - snakes are the most plentiful in this food chain
Read each of the statements that describe the function of a cell cycle regulator. Then drag each sentence into the correct category.
regulates checkpoints
speeds up or slows down
stops cell cycle
makes sure chromosomes
have replicated
cell cycle
Internal regulators
External regulators
Answers
Answer:
Regulates Checkpoints - growth factor and damage to DNA
Speeds up or slows down - External regulators
Stops cell cycle - When cells are growing and dividing
Make sure chromosomes have replicated - Internal regulators
Explanation:
Cell cycle is the process by which cell development happens. The body functions has the ability to control the growth of cells. When the body looses the ability to control and regulate the cell growth cycle the body is in a state of disease called cancer.
Answer:
Internal Regulators:
Regulates CheckpointsMakes sure Chromosomes have ReplicatedExternal Regulators:
Stops Cell CycleSpeeds Up or Slows down Cell CycleHope this helps
-Greg
