Answer:
发发发 发斯蒂芬
Explanation:
Presence of capsule. Therefore, option (B) is correct.
What was Griffith's experiment?Griffith's experiment of transformation is a landmark experiment in microbiology conducted in 1928 by British bacteriologist Frederick Griffith. The experiment aimed to determine the nature of the "transforming principle" responsible for transferring genetic material between bacteria.
Griffith used two strains of Streptococcus pneumoniae, one that was virulent and had a polysaccharide capsule (S strain) and another that was non-virulent and lacked the capsule (R strain). He found that when he injected mice with the heat-killed S strain and live R strain, the mice died, and live S strain was found in their blood. This suggested that the R strain had been transformed into the S strain, and the genetic material was responsible for the transformation.
Griffith's experiment provided the first evidence of bacterial transformation and paved the way for future research on the molecular basis of genetics.
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Which one of the following physical quantities is formed after dividing mass of volume?
I} Weight
II} Velocity
III} Density
IV}Work
Answer:
Density
Explanation:
Density is refer to how much space an object in Mass take in volume.
It is mass if an object divided by volume.
It usually in g/cm3
Schistosoma becomes infectious to humans during which of the following stages?
After cercariae migrate to the liver
After the eggs are released in urine
After it is released from the snail
After mating of male and female worms
Before the eggs hatch
Which of the following groups includes a protozoan that is transmitted sexually?
Chromalveolata
Excavata
Amoebazoa
Archaeplasteda
Rhizaria
Schistosoma becomes infectious to humans during which of the following stages?
After cercariae migrate to the liver
After the eggs are released in urine
After it is released from the snail
After mating of male and female worms
Before the eggs hatch
Which part of a mushroom would be eaten?
Thallus
Sporangium
Mycelium
Septum
Hyphae
Answer:
After it is released from the snailExcavata SporangiumExplanation:
Schistosoma life cycle:
1. Human excretes schistosomes eggs through feces and/or urine. These eggs eventually reach the water.
2. Once in the water, schistosomes eggs hatch and release immature larvae named miracides.
3. Miracides swim and penetrate a freshwater snail, which is an intermediary host.
4–5. Once inside the snail, miracides turn into sporocites and then into cercariae. Cercariae characterize by having a bifurcated tail. Snails release the cercariae in water, and they swim until they get in touch with a mammal. Once they reach the mammal, they penetrate the skin and get into the body. This is the stage in which the parasite becomes infectious to humans. Just a few cercariae are enough to infect a person.
6. When cercariae penetrate their host body, they lose their tails and turn into schistosomules. These new forms travel to the liver, where they end their maturation process.
7. Males and females mate in the liver and migrate to veins of the intestine or bladder. Once there, the females lay the eggs, which are then excreted by the host. And the cycle begins again.
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Excavata are asymmetrical protists. The group receives its name because of the appearance of the feeding groove. Excavata is composed of many protists. One of them is Parabasalid.
Parabasalids are parasitic protists, and one of them is Trichomonas vaginalis, which is transmitted sexually.
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Sporangium. This is the reproductive structure of the mushroom and the one that is usually eaten. Spores develop inside the sporangium. Its surface is covered by a protector cuticle. It can be eaten when it is closed or when it is already open. However, when open is tastier.
56:25
If blood is in short supply, which blood type would be the most beneficial to have on hand if someone needed a blood transfusion?
O+
O–
AB+
AB–
For what purpose is the mineral corundum commonly used?
O A. To make pencils
O B. To make false teeth
O C. To make emery boards
O D. To make drinking glasses
Answer:
D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.
Answer:
It's to make emery boards
Explanation:
I just took the test
Psychometric scores for anxiety, depression, negative self, somatization, and hostility were combined into a single Global Severity Index (GSI). Global Severity Index was compared for 80 adolescents who were seen in the outpatient clinic for 7 different physical complaints (short stature, obesity, lack of weight gain, breast problems, genital problems, menstrual problems, and hirsutism). Report the degrees of freedom for the relevant F statistic in the numerator and the denominator. (Round your answers to the nearest whole number.)
Answer:
The correct answer is -
Numerator = 6
Denominator = 73
Explanation:
In F static test or table there are two sets of degrees of freedom: one for the numerator and one for the denominator. The degrees of freedom are equal to the number of observations minus one. Thus, if the sample size were 7 then the degree of freedom would be 7 minus 1
Numerator df = 7 - 1 = 6
Thus, the numerato would be - 6.
Denominator is calculated by subtracting the observation or variables from the total number of sample size.
Denominator df = 80- 7 = 73
Which of the following statements about dinoflagellates is true? Select one: A. All known varieties are autotrophic. B. Their walls are usually composed of silica plates. C. Many types lack mitochondria. D. Some produce toxic agents in the water E. Their dead cells accumulate on the seafloor, and are mined to serve as a filtering material.
Answer: The correct option is D(Some produce toxic agents in the water).
Explanation:
Dinoflagellates are found in the phylum Dinoflagellata which are single celled organisms. They are mostly found in the ocean while few of them can live in streams, freshwater ponds and rivers. The following characteristics can be used to identify a Dinoflagellates, these include:
--> they are golden brown
--> they possess assimilative cell with indented waist.
--> they possess large nucleus with visible chromosomes.
It has been reported that many dinoflagellate species can produce various natural toxins. These toxins can be extremely toxic and many of them are effective at far lower dosages than conventional chemical agents. Therefore the option, Some produce toxic agents in the water, is a correct statement.
Can somebody help me
Answer:
sure what's your problem.
Explanation:
Tell me.
An enzyme is a _____ molecule.
a. polysaccharide
b. nucleic acid
c. carbohydrate
d. protein
Glycogen is an important and quickly mobilized source of stored glucose. Glucose is mobilized for ATP generation in muscle in response to epinephrine, which activates Gs. How would inhibitors of cAMP phosphodiesterase affect glucose mobilization in muscle
Answer:
Glucose mobilization would continue
Explanation:
The GTP-bound alpha subunit (Gαs) is a subunit of the heterotrimeric G protein which is required for stimulating the cAMP-dependent pathway through the activation of the membrane-associated enzyme adenylyl cyclase, which in turn catalyzes the synthesis of the second messenger cyclic-3′,5′-adenosine monophosphate (cAMP) from ATP. Moreover, cAMP phosphodiesterase is an enzyme that hydrolyzes cAMP, thereby negatively regulating the levels of this second messenger, which is fundamental for the termination of the signal. In this case, the epinephrine signal initiates glycogen breakdown (glucose mobilization) in muscle cells. In consequence, if the cAMP phosphodiesterase enzyme is inhibited, the concentration of cAMP will persist high even beyond the termination of the signal, thereby glucose mobilization would continue.
Which interaction involves only one of Earth’s spheres?
Plant roots take in water from the soil.
Plants take in carbon dioxide from the air.
During photosynthesis, plants make food and release oxygen into the air.
Energy stored in plants is transferred to humans and animals that eat them.Which property of soil depends on the size of particles?
color
odor
temperature
texture
Answer:
Energy stored in plants is transferred to humans and animals that eat them
Explanation:
Which of the following groups includes a protozoan that is transmitted sexually?
Chromalveolata
Excavata
Amoebazoa
Archaeplasteda
Rhizaria
Which of the following is a distinction between Ascomycetes and Basidiomycetes?
Ascomycetes form a sac around the sexual spores.
Ascomycetes have zygotes.
Ascomycetes release basidiospores.
Basidiomycetes form a shell around the sexual spores.
Basidiomycetes release conidiospores.
Which of the following is a specialized structure that would contain food ingested by phagocytosis?
Saprozoic
Cytostome
Cytoproct
Oral groove
Holozoic
Which part of a mushroom would be eaten?
Thallus
Sporangium
Mycelium
Septum
Hyphae
Answer:
Ascomycetes have zygotes
Mycelium
Explanation:
Ascomycetes have zygotes which is the main distinction between Ascomycetes and Basidiomycetes. Mycelium is a part of mushroom that is edible and can be eaten. Mycelium is the vegetative part of a fungus that consist of a mass of branching, thread-like hyphae. Hypha is a long, branching, filamentous body of mushroom as well as oomycete and actinobacteria. Hyphae are the primary mode of vegetative growth of fungi which is generally known as mycelium so mycelium is the edible part of mushroom.
The most intense earthquakes happen at
1. Plate boundaries
2.subduction zones
3.mid - ocean ridges
4. Collision plate boundaries
Answer:
The answer is #2. Subduction Zones
White a paragraph comparing the organices in a to the organs in your body.
Answer:
An organ is a part of the body of a living organism perform a specific role in the body such as the stomach, the liver and many more. Organelles on other hand are like organs of the cells that are contained in the cytoplasm of cell these also have a certain specialized roles to play for the cell, and they all depend on each other. The example of the organelles are nucleus, mitochondria and many more.
* Organelles are structures inside the cytoplasm of cells
* Organs are amde up of tissues composed of group of specialized cells that, has a particular role in the body
What is gylcosylation
Glycosylation is the reaction in which a carbohydrate, i.e. a glycosyl donor, is attached to a hydroxyl or other functional group of another molecule in order to form a glycoconjugate. In biology, glycosylation usually refers to an enzyme-catalysed reaction, whereas glycation may refer to a non-enzymatic reaction.
A suspension of yeast cells is being grown under anaerobic conditions such that glucose is metabolized to ethanol and carbon dioxide. An inhibitor of alcohol dehydrogenase is added to the suspension, the cells rapidly die. Explain.
Answer:
The correct answer is - NAD needed to keep glycolysis going is not being recycled so the entire process is shut down and no ATP is produced
Explanation:
Alcohol dehydrogenase plays role in metabolizing the bulk of ethanol consumed as part of the diet and their activities contribute to the rate of ethanol elimination from the body.
Inhibitor of this zinc enzyme prevents it to perform its function which results in NADH generated during anaerobic conditions glycolysis cannot be recycled back to NAD+, So the ATP production pf anaerobic condition through glycolysis cannot be maintained.
Muscle cells that are worked often in exercise will require more mitochondria. If we use more mitochondria, it will require us to use more carbohydrates to build ATP’s. What if we run out of carbohydrates stored in our body? What macromolecule can we break down and use in cellular respiration?
Group of answer choices
A) sucrose
B) lactose
C) glycogen
D) lipids
Answer:
Lipids
Explanation:
Whats bigger, fungi or virus?
Answer:
fungi
Explanation:
bcuz it is plant-like organism with lack of chlorophyll
A 55-year-old male is sent to your office to have an esophagogastroduodenoscopy. He is a heavy drinker and smoker who also consumes spicy foods on a daily basis. He is quite anxious about having the procedure performed and is afraid he might choke during insertion of the scope. His father and younger brother were both diagnosed with esophageal cancer. His father died, but the brother was just recently diagnosed and is taking chemotherapy.
A. List the risk factors the patient has for developing esophageal cancer.
B. How might you calm the patient's fears about the procedure?
Answer and Explanation:
A. The risk factors for this patient are age, family history, and smoking and alcoholism. That's because, most cases of esophageal cancer are detected at age 55 years. We must not forget that cancer is a disease with great genetic potential, which means that, as the father and brother of this patient had this type of cancer, this patient has a high probability of developing the same cancer. Furthermore, the constant consumption of cigarettes doubles the risk of developing esophageal cancer. This risk is also increased by alcoholism.
B. To calm the patient down, I would say that there is a very small and almost non-existent risk that he will choke or even feel the endoscopy insertion, as the entire procedure is done with the patient anesthetized and sedated.
A) Risk factors include
People between the age of 45 and 70 have the more risk of esophageal cancer.If the patient has genetic signs of cancer from the past generations may have highest risk of esophageal cancer.Males have more risk than women that is 3 to 4 times to develop esophageal cancer.Alcohol consumption also increases the risk of esophageal cancer.Too much weight or obesity increases the risk of esophageal cancer.Deficiency in nutrients, vitamins and minerals can increase risk of esophageal cancer.B) Calming the patients fears
Make the patient be happy and stress free.Do exercise which produces mood boost endorphins that get rid of worries and stress.Stay positive, being friendly keep good health.For more information on esophagogastroduodenoscopy, visit
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What causes fingers to look wrinkled after soaking in water?
O A. The skin cells lose all their water.
O B. Water enters the cells in the skin.
O C. The skin cells shrink in size.
.
D. Salt enters the skin cells.
Answer:
B. Water enters the cells in the skin.
Explanation:
6.Two apparently normal parents have a daughter who suffers from agammaglobulinemia (AGG), an inherited defect of the immune system. Use a Punnett square to show how two normal parents could have a child afflicted with an inherited disease. What are the parents' genotypes
Answer:
See the answer below
Explanation:
For two normal parents to have produced a daughter who suffers from AGG, it means the disorder is an autosomal recessive trait. In order words, it means the parents are both carrying the allele for the disorder in recessive form.
Let us assume that the allele for the disorder is represented by b, meaning that the alternate form would be B. Both parents will have the genotype Bb and will both appear normal.
Bb x Bb
BB Bb Bb bb
The affected child would be the one with bb genotype while the remaining children would appear normal. See the attached image for the Punnet's square analysis of the cross.
The genotypes of the parent would be heterozygous.
Students in a science class tested different plant seeds to determine how long it took each type of seed to fall from the second- story window of the school. They tested 100 seeds of each type in order to find out which type of seed had the the parent plant. The data they collected is shown in the chart below. which of these graphs best represents the students data?
walnut/0.6
maple/4.5
redoak/0.6
ash/2.0
pine/2.4
The correct answer is C.
Explanation
According to the information provided, a bar graph (option C) is needed since this type of graph allows us to express the variation in time, distance, temperature, quantities, weight, among others. In this specific case, a bar graph allows students to analyze the time that each type of seed takes to fall from the second floor. Additionally, this is the only graph that shows the data of the chart. For example, the first bar represents the black walnut and its time is 0,6 seconds, and this value is shown by the light blue bar in the graph, which represent the same seed. According to the above, the correct answer is C.
Lectins often bind their ligands via multiple weak interactions. bind their ligands with relatively low specificity. prevent viruses from binding to their target cells. are carbohydrates that bind to receptor proteins.
Answer:
The correct answer is - B.often bind their ligands via multiple weak interactions.
Explanation:
Lectins are specific types of proteins that identify and bind to specific carbohydrates present on the cell surfaces. They have an essential role in interactions and communication between various cells for identification and recognition.
Binding sites of lectins on the surface of one cell bind to the Carbohydrates on the surface of another cell. A lectin usually has two or more binding sites for carbohydrate units.
5. Which of the following professionals has the authority to prescribe medication and treatment?
A. Nurse practitioner
B. Clinical dietician
C. Nutritionist
D. Home health aide
Answer: A. Nurse practitioner
Explanation: Hope it helps
Answer:
A. Nurse practitioner
Explanation:
Have a great day!
Why does population growth slow as size increases in the logistic model?
A : due to density-dependent factors
B : due to density-independent factors
C : due to a decrease in death rate
D : due to an increase in birth rate
Answer:
due to densinty dependent factors
Explanation:
because it determining energy requirement in human being
Population growth slow as size increases in the logistic model A : due to density-dependent factors is correct option.
In the logistic model of population growth, the slowdown in population growth as the population size increases is primarily attributed to density-dependent factors. Density-dependent factors are those that have a stronger impact on a population when its density (number of individuals per unit area) is higher. As a population grows and becomes more dense, competition for resources (such as food, space, and mates) intensifies, and factors like disease transmission and predation become more significant.
These density-dependent factors can lead to a decrease in birth rates, an increase in death rates, or both, which ultimately results in the population growth rate slowing down and eventually stabilizing at its carrying capacity (the maximum sustainable population size for a given environment). This pattern is characteristic of the logistic growth model, which describes a more realistic and sustainable form of population growth compared to the exponential growth model.
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Transport proteins———-
Answer:
A transport protein is a type of protein that helps an organism move other materials around. Transport proteins are essential for all living organisms' development and survival. Transport proteins come in a variety of shapes and sizes.
OAmalOHopeO
Macronutrients is the most readily available for energy production
Answer:
The correct answer is - true.
Explanation:
All the macronutrients carbohydrates, fats, and protein all three produce energy. Carbohydrates are the most preferred source of energy for the human body as it is the macronutrient that your system most requires.
The human body easily breaks down most carbohydrates and provides a significant amount of energy. The energy-providing process is called cellular respiration starts with glucose as a substrate. Glucose is the simplest carbohydrate.
An ecologist counted the number of eggs in randomly selected nests in a population of birds. To test the hypothesis that the number of eggs per nest follows a Poisson distribution at the 5% level of significance, you will need to compare a calculated value with a critical value.
Eggs Number of nests Prob Expected
nest, xi per fi
0 15 0.2845 19.9
1 29 0.3576 25.0
2 19 0.2248 15.7
23 7 0.1331 9.3
SUM: 70 1.0000 70.0
What are the calculated and critical values for this test?
a. calculated = 45.6; critical = 5.991.
b. calculated = 3.10; critical = 5.991.
c. calculated = 5.89; critical = 5.991.
d. calculated = 3.10; critical = 7.815.
Answer:
d. calculated = 3.10; critical = 7.815.
Explanation:
To test the hypothesis Given in the question above, we use the Chisquare goodness of fit :
The test statistic is defined as :
χ² = Σ(Observed - Expected)² / Expected
Observed = number of nests
χ² = ((15 - 19.9)^2 / 19.9) + ((29 - 25)^2 / 25) + ((19 - 15.7)^2 / 15.7) + ((7 - 9.3)^2 / 9.3)
χ² = 3.1089
The critical value :
df = n - 1 = 4 - 1 = 3
The critical value ;P(χ² at 0.05, df = 3 ) = 7.815
Bleach For me!!!!!!!!!
Answer:
answer: c
Explanation:
A hemoglobin molecule is made up of four
polypeptide chains, two alpha chains of 141
amino acid residues each and two beta
chains of 146 amino acid residues each . In the complete molecule, four subunits are closely joined, as in a three-dimensional jigsaw puzzle, to form a tetramer.
it also have a structure called quaternary structure, in which two or more polypeptide chains folded in to tertiary structure become associated in the final structure of the protein.
hope this will help !
Answer:
Option C
Explanation:
4 subunits (2 alpha and 2 beta)
WHAT IS PHOTOSYNTHESIS?
Answer:
Photosynthesis is the process in which plants make their own food from inorganic substances like carbondioxide and water to organic substances in the presence of sunlight and chlorophyll
Explanation:
Have a nice day
the valency of flourin is 1 what is the valence electron
Answer:
Fluorine has 7 valence electrons and would need another one to have a full outer valence electrons.
