The only cells in the body capable of specifically recognizing and distinguishing different antigenic determinants are:________
Answer: They are called "lymphocytes"
Answer:The answer is lymphocytes.
Explanation:Please give brainliest if right.
If you have two different amounts of the same substance, why doesn't its density change? Please respond in 1–2 complete sentences using your best grammar.
The density remains the same because changing the amount of the substance will reduce the mass & volume by the same value.
What is density?
Mass per unit volume is the definition of a material's density. Density, or mass per unit volume, is defined as the ratio of mass to volume. It gauges how so much "stuff" an object looks in relation to its volume (cubic meter or cubic centimeter).
In essence, density is an indicator of how closely together stuff is packed. The Greek scientist Archimedes is credited with discovering the concept of density, which is simple to calculate if you understand the formula and are familiar with the relevant units.
Therefore, the density will remain the same when the mass and volume are reduced.
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Since marine life is either freshwater or marine, estuaries play little importance in aquatic ecosystems.
True or false?
Answer: False
Explanation:
A bacterium does not continuously swim at one speed in one direction. Different arrangements and structures of flagella contribute to changes in speed and direction when necessary. How does motility relate to flagellation?.
Different arrangements and structures of flagella contribute to changes in speed and direction when necessary. Motility relates to flagellation as:
Polar flagella (in any one or both the poles of the bacterium) makes the organism move very quickly in a particular direction.Peritrichous flagella (present all over the cell) helps the organism in rotation and tumbling.Amphitrichous flagella ( present in bulk at both the ends) move the organism slowly as these flagella work alternately and hence stop periodically to change directions).Flagella is a hair like structure present in both prokaryotic as well as eukaryotic cell. It helps in motility. An organism can have a single flagella or multiple and these can be arranged in various ways.
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determine all the possible modes of inheritance for the pedigrees. you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. pedigree a pedigree b pedigree c answer bank
A pedigree is all the possible modes of inheritance for the pedigrees. you are currently in a labeling module.
It will be an X-linked recessive in Pedigree A. The X chromosome of a person exhibits the trait in this type of inheritance pattern.Identify all potential inheritance patterns for the pedigrees. A Pedigree B Pedigree Answers to Pedigree C 1 Autosomal II X-linked Recessive IV IV autosomal recessive III III autosomal dominant Autosomal dominant autosomal recessive IncorrectOne way to spot a recessive trait is to look for traits that skip a generation in a pedigree; these traits are frequently autosomal recessive traits. These characteristics are equally prevalent in both sexes. Ascertain whether the pedigree chart depicts an X-linked or autosomal disease.To learn more about inheritance.
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What is the major contributor to the increase in antibiotic resistance in bacteria?
The biggest contributor to increasing antibiotic resistance in bacteria is their overuse.
What are antibiotics?
Antibiotics are medicines that fight, as their name indicates, infections caused by living beings, especially bacteria. What it does is kill bacteria or make it more difficult for them to grow. Antibiotics should not be taken improperly as this contributes to resistance when using them. This occurs when the bacteria adapt to this antibiotic and can resist its action, slowly increasing the resistance to that antibiotic by the bacteria from one generation to the next.
Therefore, we can confirm that the biggest contributor to increasing antibiotic resistance in bacteria is their overuse which promotes the evolution of bacteria into more resistant strains.
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50 Pts What is the function of chloroplasts in plant cells?
Responses
1They control the cell's homeostasis, EndFragment,
2They are responsible for DNA replication,
3They translate DNA into an amino acid sequence and synthesize proteins
4They use carbon dioxide, water, and light energy to produce oxygen and glucose
Answer:
4) They use carbon dioxide, water, & light energy to produce oxygen & glucose.
Explanation:
The function of chloroplast is to use carbon dioxide, water, and light energy to produce oxygen and glucose.
It is done by the process of photosynthesis. Therefore, the option (4) is the correct answer.
Jasmine and Paul are performing an experiment to test how the
heart rate is affected by exercise. Which of the following is the BEST
hypothesis for Jasmine and Paul's experiment?
The best hypothesis for Jasmine and Paul's experiment is that exercise increase the heart rate.
How the heart rate is affected by exercise?The heart rate is greatly affected by exercise because exercise needs a lot of energy and oxygen and we know that heart is responsible for providing oxygenated blood to the cells and remove waste material from it. When we do exercise our body needs oxygen very quickly in order to produce large amount of energy in the form of ATP. So we can say that exercise increase heart rate.
So we can conclude that The best hypothesis for Jasmine and Paul's experiment is that exercise increase the heart rate.
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design solution to treat sewage water in anaerobic digestion
An anaerobic treatment cycle entails wastewater entering a bioreactor plug socket containing sludge, a thick semi-solid substance rich in anaerobic bacteria and other microorganisms that break down the organic contaminants in the wastewater.
What is anaerobic digestion?Anaerobic digestion is a process in which bacteria break down organic matter in the absence of oxygen, such as animal manure, wastewater biosolids, and food waste.
Anaerobic digestion is the most commonly used sludge treatment method. In this process, a significant portion of the organic matter (cells) is broken down into carbon dioxide (CO2) and methane (CH4) in the absence of oxygen.
Thus, this is the way to treat wastewater anaerobically.
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After swallowing, in what order does food pass through the regions of the gi tract?.
Stomach. Glands in your stomach lining make stomach acid and enzymes that break down food.
What is Stomach?Humans and many other animals, including numerous invertebrates, have a muscular, hollow organ called the stomach in their gastrointestinal tracts. The stomach is a crucial organ in the digestive system and has a dilated configuration. Following chewing, the stomach participates in the gastric phase of digestion. Using enzymes and hydrochloric acid, it performs a chemical breakdown.
The stomach is situated between the oesophagus and the small intestine in humans and many other animals. To aid in food digestion, the stomach secretes gastric acid and digestive enzymes. The pyloric sphincter regulates how food that hasn't fully broken down (called chyme) moves from the stomach to the duodenum, where peristalsis takes over to move it through the rest of the intestines.
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When scientists use logic to determine the age of one fossil compared to another, they use this
type of dating?
Relative
O Carbon
O Absolute
Answer: Carbon Dating though measuring Carbon-14 levels
Explanation:
Scientist measure the age of a fossil determined on the Carbon-14 level compared to the Carbon-12 level. This method works because:
All organisms after their death stop replenishing the amount of carbon in their body. That means that they will have an equal amount of carbon-12 and carbon-14 until they die. Unlike carbon-12, carbon-14 is unstable and overtime will go through beta decay. Overtime, a carbon-14 neutron will become a proton and release an electron, transforming into nitrogen-14.This leads to a drop in carbon-14 level, and because of this, geologist compare the level of carbon-14 to carbon-12 to determine how long it has taken to reach such stage.Ten grams of sugar is placed in a beaker with 100ml of water. Initially, the sugar is at the bottom of the beaker however once gradually heated the sugar disappears. Which statement best explains what type of change occurred?
The dissolution of sugar in water is an example of a physical change as no new substance is formed and it is easily reversible.
What are chemical and physical changes?Physical changes are changes that occur in the physical properties of substances.
The properties of physical changes include:
no great heat changes occurthey are reversibleno new substances are formed.Chemical changes are changes that occur in the chemical properties of substances.
The properties of chemical changes include:
great heat changes occurthey are not easily reversiblenew substances are formed.Considering the dissolution of sugar in water, no new substance is formed, instead a mixture of water and sugar is obtained. Also, the change is easily reversible as the sugar can be obtained by heating tue mixture to evaporate the water.
herefore, it is an example of a physical change.
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Note that the complete question is given below:
When sugar in a beaker is heated over a low flame, the solid crystals disappear and a thick, yellow-brown liquid forms. Determine whether this change is a chemical reaction or a physical change.
chemical reaction
physical change
1. Do car accidents increase your car insurance cost?
Independent Variable:
Dependent Variable:
What is the effect of
Independent Variable.
On
Dependant Variable
Answer:
Yes.
Explanation: Yes,
Independent Variable is the insurance cost, the dependent variable is the car.
The cost of the cars insurance is the effect. I hope this helps :)
If the rate of atrial depolarization was normal while the rate of ventricular depolarization was slower than normal, where would you expect to find a dysfunction in the electrical conduction pathway of the heart?.
You will find a dysfunction in the QRS complex of the electrical conduction pathway of the heart if the atrial depolarization is normal and the rate of ventricular depolarization is slower.
The waveform QRS complex represents the second acrion, ventricular depolarization. Q,R,S waves are included in the QRS complex; in rare circumstances, the q wave may not be seen. QRS measurements consist of 1.5-3 tiny boxes and take 06-.12 seconds. It calculates the complex from the first deflection following the P wave to the point where the S wave hits the isoelectric line (Period of zero electrical activity).
Ventricular depolarization is facilitated in part by an auxiliary route (AP) that connects the atrial and ventricle and is therefore capable of transferring electrical impulses into the ventricle without using the AV-His Purkinje conduction system.
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Is used in all steps of protein synthesis and carries the genetic information of many viruses.
RNA used in all steps of protein synthesis and carries the genetic information of many viruses.
RNA- All living cells contain ribonucleic acid (abbreviated RNA), a nucleic acid with properties comparable to those of DNA. However, RNA is often single-stranded, unlike DNA. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is made up of consecutive phosphate groups as well as the sugar ribose.
DNA- The molecule found inside cells that carries the genetic material necessary for an organism to grow and operate. This knowledge may be handed forward from one generation into the next thanks to DNA molecules.
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The reactions for cellular respiration that releases energy for use by the cell occurs in which site?
Golgi apparatus
endoplasmic reticulum
cytoplasmic membrane
mitochondrial membrane
The reactions for cellular respiration that releases energy for use by the cell occur in the mitochondrial membrane (Option 4).
What is the mitochondrial membrane?The mitochondrial membrane is a membrane that surrounds the mitochondria, which are organelles specialized to produce energy in the form of high-energy adenosine triphosphate (ATP) molecules by different steps of cellular respiration in aerobic organisms (ie. the Krebs cycle and oxidative phosphorylation).
In conclusion, the reactions for cellular respiration that releases energy for use by the cell occur in the mitochondrial membrane (Option 4).
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HELP!!!!!! Consider these two biomes: (1) the temperature ate grassland and (2) the temperature woodland and shrubland. Coyotes live in both biomes. Describe two adaptions that might enabled coyotes to tolerate conditions in both biomes.
A moderate climate often features freezing winters and mild to scorching summers. Temperate grassland, woodland, and shrubland-dwelling coyotes have unique adaptations that allow them to tolerate scorching summers and chilly winters. They can withstand chilly temperatures because to their thick fur.
This is further explained below.
What are coyotes?Generally, The coyote is a species of canine native to North America. It is smaller than its close relative, the wolf, and slightly smaller than the closely related eastern wolf and red wolf.
It fills much of the same ecological niche as the golden jackal does in Eurasia
In conclusion, A moderate climate has cold winters and hot summers. Temperate grassland, woodland, and shrubland coyotes have adapted to hot summers and cold winters. Their dense fur keeps them warm.
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All organisms in the kingdoms protista, plantae, fungi, and animalia are... *
O multicellular organisms.
O prokaryotes.
O eukaryotes.
O photosynthetic organisms.
All organisms in the kingdoms protista, plantae, fungi, and animalia are eukaryotes.
All the kingdoms of eukaryotes including protista, plantae, fungi, and animalia are placed in the domain eukarya.
Any cellular or creature with a distinct nucleus is stated to be a eukaryote. The nucleus of a eukaryotic cellular, which homes the nicely-described chromosomes (our bodies preserving the genetic cloth), is surrounded by using a nuclear membrane. Organelles together with mitochondria (cellular power exchangers), the Golgi equipment (a secretory tool), the endoplasmic reticulum (a canal-like shape of membranes inside the mobile), and lysosomes also are found in eukaryotic cells (digestive equipment within many mobile kinds). The absence of mitochondria and a nucleus in crimson blood cells, as well as the absence of mitochondria in the oxymonad species Monocercomonoides, are some exceptions to this rule.To know more about eukaryotes, visit:
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In which stage of mitosis do the identical sets of chromosomes line up along the midline or equator of the cell?.
The stage of mitosis in which identical sets of chromosomes (i.e., homologous chromosomes) line up along the midline or equator of the cell is called metaphase and it is the second 2nd step of cell division.
What is metaphase?Metaphase is the second step of mitosis, which is a cell division process aimed at generating somatic cells having the same genetic material as the parental cells.
Mitosis is a cell division cell in which a parental cell divides to produce two 2 genetically equal identical daughter cells, and this division cycle has different sequential stages (i.e., prophase, metaphase, anaphase, telophase, and cytokinesis)
In conclusion, the stage of mitosis in which identical sets of chromosomes (i.e., homologous chromosomes) line up along the midline or equator of the cell is called metaphase and it is the second 2nd step of cell division.
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Does osmosis require the use of energy to transport water across a cell membrane?.
Answer:
No
Explanation:
Osmosis is not require any energy. It's a passive transport.The way it works is :
Water moves along the concentration gradient.Water moves towards the more concentrated solution
If the mitochondria and chloroplasts in eukaryotic cells resulted from endosymbiosis between various prokaryotes, what features should these organelles have?.
According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms.
What is endosymbiotic theory?According to this hypothesis, the first eukaryotic cell was most likely a cell resembling an amoeba that obtained nutrients through phagocytosis and had a nucleus that developed when a portion of the cytoplasmic membrane pinched off around the chromosomes
As with prokaryotic cells, chloroplasts are the same size, divide via binary fission, and have Fts proteins at their division plane.
The mitochondria of some protists have Fts homologs at their division plane and are the same size as prokaryotic cells. They divide by binary fission.The DNA in mitochondria and chloroplasts is circular rather than linear.The ribosomes found in mitochondria and chloroplasts have 30S and 50S subunits rather than 40S and 60S.Therefore, According to the endosymbiotic theory, some of the organelles in eukaryotic cells of the present day were once prokaryotic microorganisms.
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If an epithelium has all cells touching the basement membrane, but not all cells reach the apical surface, that epithelium would be called a ________ epithelium.
If an epithelium has all cells touching the basement membrane, but not all cells reach the apical surface, that epithelium would be called a simple columnar epithelium.
The single layer of cells that make up the simple columnar epithelium are taller than they are wide. This kind of epithelium borders the small intestine and is responsible for absorbing nutrients from the gut's lumen. The stomach has simple columnar epithelia as well, which secretes mucus, acid, and digesting enzymes.
A basement membrane adheres to the basal surface of every epithelial cell. The basement membrane binds a layer of epithelial cells together and offers some mechanical support.
Although some cells do not reach the apical surface, all of the cells are in contact with the basal lamina despite the illusion of stratification caused by the arrangement.
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What happens to ice as it warms up?
Answer:
the ice melts into liquid water.
Answer:
It turns into liquid water...
1 ♥
Next O Introduction to Biochemistry: Mastery Test
Plants contain the carbohydrates starch and cellulose. In the spring when stem growth is at its fastest rate, cellulose production rates an
Increased in some plants. In the months with less sunlight, the level of starch decreases in some plants. What does this information
demonstrate?
OA Two functions of carbohydrates are structural support and energy storage.
OB.
Carbohydrates are not necessary for plants to grow.
OC. Plants cannot produce carbohydrates when there is no sunlight.
OD. Two functions of carbohydrates are structural support and transferring genetic information.
Reset
Next
The correct answer is option A. which states that the two functions of carbohydrates in plants are structural support and energy storage.
Cellulose is a polysaccharide which is made up of numerous glucose chains linked to each other. It's main function is to provide a structural rigidity and support to the plants. It is also a constituent of the cell wall.Starch is another polysaccharide which is serves as the primary source of food and energy for living beings. Plants produce sugar through the process of photosynthesis using sunlight, carbon dioxide and water which is stored in the form of starch in plants.Hence, the correct answer is option A. the two functions of carbohydrates in plants are structural support and energy storage.
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What is the frequency of the a1a2 genotype in a population composed of 20 a1a1 individuals, 80 a1a2 individuals, and 100 a2a2 individuals?.
The frequency of a1a2 genotype in the population will be 0.4.
Frequency can be defined as the rate of repetition of an event or outcome. To calculate the frequency, the number of desired outcome is divided by the total number of possible outcomes.
According to the question,
a1a1 individuals = 20; a1a2 individuals = 80 and a2a2 individuals = 100
Therefore, the total number of individuals in the population = 20 + 80 + 100 = 200
Here the desired outcome is a1a2, which is equal to 80 and the total number of outcomes = 200.
Therefore, frequency of a1a2 individuals = [tex]\frac{80}{200}[/tex] = 0.4
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Which of these best explains why salivary amylase does not break down proteins?
what is the function of structure e? the cell membrane. each letter marks a definite structure of the membrane. letter a marks the structure represented by a branched sequence on the integral protein. b marks a branched structure on the cell membrane. c marks a large elongated structure outside the cell. d marks part of the membrane, which consists of two rows of molecules. each molecule has a head and a tail. e marks a molecule, which is one of the membrane components. such molecules are randomly integrated in the membrane. f marks a structure that penetrates two layers of the membrane. what is the function of structure e? the cell membrane. each letter marks a definite structure of the membrane. letter a marks the structure represented by a branched sequence on the integral protein. b marks a branched structure on the cell membrane. c marks a large elongated structure outside the cell. d marks part of the membrane, which consists of two rows of molecules. each molecule has a head and a tail. e marks a molecule, which is one of the membrane components. such molecules are randomly integrated in the membrane. f marks a structure that penetrates two layers of the membrane. detection of environmental change cell-cell communication stabilization of the phospholipids structural support of the cell transport across the plasma membrane
stabilization of the phospholipids -Cholesterol helps to stabilize the structure of the plasma membrane.
What is plasma ?Of the four basic states of matter, plasma is one. It comprises a substantial amount of ions and/or electrons, which are both types of charged particles. The main distinction between plasma and the other elementary forms of matter is the presence of these charged particles. Being largely linked to stars, such as the Sun, it is the most prevalent type of ordinary stuff in the universe. It reaches to the rarefied intracluster medium and perhaps even to areas outside of our galaxy. Heating a neutral gas or exposing it to a powerful electromagnetic field can produce plasma artificially.
Plasma is electrically conductive due to the existence of charged particles. Individual particle dynamics and macroscopic plasma motion are controlled by collective electromagnetic fields, and both are extremely sensitive to externally imposed fields.
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3. Our cells have 2 types of chromosomes called:
sex chromosomes and autosomes(somatic)
Which of the following is the best explanation of
the available energy at each of the trophic levels
in this ecosystem?
A. The amount of available energy is equal at all
trophic levels because all organisms require
energy.
B. Third-level consumers have the greatest
amount of available energy because they
require energy to fly and hunt for prey.
C. Producers have the greatest amount of available
energy because they absorb heat from the sun.
D. The amount of available energy decreases at
each trophic level because energy is lost as
heat and used for life processes.
What happens at 0° Kelvin? Select the best answer. (1 point)
O At 0° K, or absolute zero, all particle motion stops.
O A substance will lose both shape and volume.
O Particles have enough kinetic energy to begin to move.
O Particle motion slows to a vibration, preventing particles from escaping forces of attraction.
Answer:
A
Explanation:
Took the test
At 0° Kelvin or absolute zero, all particle motion stops. Thus, option A is correct.
What is absolute zero?
The lowest limit of the thermodynamic scale that measures temperature is known as absolute zero. It is also a condition in which entropy and enthalpy of a ideal gas which is cooled reached to its maximum value and the reading is taken as zero kelvin.
Absolute zero is also the lowest energy temperature in the thermodynamics and there is no cooling of an object on temperature that is exactly absolute zero.
Thermal energy is also hold a conservation of energy it means energy can't be created nor be destroyed but in real world when energy is transformed from one system to another system the efficiency is always decreases. So we can say that loss of energy is takes place but it's loss to friction or resistance in term of mechanics.
Thus, At 0° Kelvin or absolute zero, all particle motion stops. Thus, option A is correct.
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