Answer:
Ribosomes
Explanation:
Ribosomes will not be found in an egg cell, human liver cell, and an amoeba.
They are found in prokaryotes and eukaryotes.
Answer:
Well...
You can say RIBOSOMES will not be found in Egg Cells!
Explanation:
Hope this helps!
There is an inherited syndrome in humans in which the cells cannot convert food into energy. Some of the symptoms include muscle weakness and a lack of coordination. Which malfunctioning organelle within the cell can cause this condition? centrioles lysosomes mitochondria ribosomes
150 ml of 54% CaCI2 solution contains how many grams of CaCI2?
Answer:
mass of CaCl₂ = 67.4 g of CaCl₂
Explanation:
A 45% CaCl₂ Solution contains 45 g of solute per 100 mL of solution.
mass concentration = mass of solute (g)/ volume of solution (L)
100 mL of solution = 100 * 1L /1000 = 0.1 L
Mass concentration of solution = 45 g/0.1 L = 450 g/L
Molar concentration of solution = mass concentration / molar mass
molar mass of CaCl₂ = 111 g/mol
molar concentration = 450 g/L / 111 g/mol = 4. 05 mol/L
Number of moles of CaCl₂ present in 150 ml of 4.05 mol/L solution = molar concentration * volume (L)
number of moles of CaCl₂ = 4.05 * 150 * 1 L/1000 = 0.6075 moles
mass of CaCl₂ present in 0.6075 moles = number of moles * molar mass
mass of CaCl₂ = 0.6075 * 111 = 67.4 g of CaCl₂
A biochemist isolates and purifies various molecules needed for DNA replication. When she adds these molecules to DNA, replication occurs, but half of the DNA produced consists of a normal DNA strand paired with numerous segments of DNA a few hundred nucleotides long. What has she probably left out of the mixture
Answer:
DNA ligase
Explanation:
The biochemist must have left out DNA ligase enzyme.
The DNA ligase enzyme is able to catalyze the formation of phosphodiester bonds and as such, capable of joining strands of DNA together to form a single strand.
The numerous DNA segments of a few nucleotides long observed by the biochemist must have been the replicated product of the lagging DNA strand. The lagging strand is replicated discontinuously in short strands because the DNA polymerase enzyme can only elongate primers in 5' to 3' direction. The short segments are known as Okazaki segments and are usually joined together to form a whole strand by the DNA ligase enzyme.
Hence, the missing component is the DNA ligase.
Non-segmentation allows for evolutionary innovation in body form
Answer:
During excitation-contraction coupling, calcium ion concentration is highest in the:
sarcoplasmic reticulum.
terminal cisterna.
cytosol of the muscle fiber.
sarcolemma.
Explanation:
What challenges would you expect scientists to face when growing plants in space? What challenges will the astronauts have with meeting their own energy needs?
Answer:
the challenges they would expect to see is the plants not having water or air
planted need water to have photosynthesis and since theres no water in space and little to no atmosphere the plants would suffocate
What is the average life span of juvenile upland game birds
Answer:
90 percent
Explanation:
Based on average estimated juvenile and adult survival rate for each species
Many cells produce chemicals called _______, hormone-like substances that impact inflammation and reproduction.
Answer:
vesicles
Explanation:
Which is the best strategy for addressing polluted air?
Reduce the cost of chemicals used in industrial processes.
Study the effects of mold exposure on people who suffer from asthma.
Encourage people to continue burning fossil fuels as they drive vehicles.
Build industrial plants and facilities that release chemicals during processing.
Answer:
Study the effects of mold exposure on people who suffer from asthma.
Explanation:
Air pollution refers to the release of chemical or substances called pollutants into the air that is harmful to human health when inhaled.
One way to address air pollution is to Study the effects of mold exposure on people who suffer from asthma because this is as a result of toxic material inhaled from the air. Mold exposure come from indoor air in buildings with mold growth and the buildings construction consist of some toxic chemicals. Exposure to mold worsen Asthma or lung problems and infants exposed to mold growth have high risk of developing asthma because of the toxic chemicals in the air that trigger asthma.
By studying the effect of mold exposure on people with Asthma can be use to address polluted air because, through the study the detrimental effect will be non and crucial steps will be taken to reduce the content of the polluted air and much care will be taken when constructing buildings by using the correct materials for construction.
Answer:
Study the effects of mold exposure on people who suffer from asthma.
Explanation:
The best strategy for addressing polluted air is by increasing those activities which reduces air pollution and prevent those activities which is responsible for increasing air pollution. People living in moldy environment suffer from asthma disease. When there is mold present in the environment, during inhalation the spores of mold present in the air enter in our body and reach to lung where it causes asthma disease.
A researcher examined the response of dandelions to herbivory by rabbits. She finds that in a greenhouse with no rabbits, there is variation in the number of seeds produced by different dandelion plants. She then mimics herbivory by rabbits and finds that dandelions that have been "eaten" by rabbits produce more seeds. From this she concludes:___________
a. The number of seeds of a dandelion is a genetically variable trait
b. Dandelion seed number is a constitutive defensive response to rabbit herbivory
c. Rabbits cause a decline in the number of dandelion seeds
d. Rabbits alter the genetics of dandelions as they feed on them
Answer:
b.
Explanation:
Based on the information provided within the question it can be said that from this info the researcher can conclude that Dandelion seed number is a constitutive defensive response to rabbit herbivory. This is mainly due to the fact that Dandelions that have been eaten by the rabbits have produced more seeds, meaning that the Dandelions defense mechanism produces more seeds when attacked in order to prevent the flower's extinction.
Cellular respiration may occur by either aerobic or anaerobic means. Identify the type of respiration that matches each item. One description will match both types of respiration.
Answer:
The respiration, which takes place in the existence of oxygen is termed as aerobic respiration. In the process, glucose goes through the process of glycolysis to generate two molecules of pyruvate that further gets transformed into acetyl-CoA and enters the citric acid cycle. The energy generated from both the citric acid cycle and glycolysis is mediated by the energy carriers like FADH2, NADH2, etc to the ETC to produce ATP. The net production of ATPs while undergoing aerobic respiration is 36-38 ATPs.
On the other hand, the respiration, which takes place in the non-existence of oxygen is termed as anaerobic respiration, also known as fermentation. The process takes place within the cells of yeasts, in the process also the formation of pyruvate takes place as the cell goes through the process of glycolysis. This pyruvate is further converted to acetaldehyde, which further gets converted to alcohol or ethanol. In the process, the net production of ATP is 2, and in animals, the same procedure is termed as lactic acid fermentation.
Thus, glycolysis takes place both in aerobic and anaerobic respiration.
The net gain of 36 or 38 ATPs takes place in aerobic respiration.
The net gain of 2 ATPs takes place in anaerobic respiration.
Lactic acid fermentation is a kind of anaerobic respiration.
The alcohol fermentation is a kind of anaerobic respiration.
The electron transport chain is used in the aerobic form of respiration.
The citric acid cycle is also used in aerobic respiration.
Which of the following example(s) does NOT cause bias in a research study.
A) Measuring body temperature with an oral thermometer in half of subjects and an ear thermometer in others
B) Counting the number of firefighters at your house to predict if it will be destroyed
C) Using a set of standardized questions to measure food intake in children
D) Studying workers to see the effects of a new health care law on unemployed
Identify factors that determine earth’s climates
Answer:
1. distance from the sea
2. ocean currents
3. direction of wind
4. shape of the land /topography
5. distance from the equator
Hope this helps
Conjugated enzymes are a key component of ELISA. To what are these enzymes conjugated, and why is that important?
Answer:
To the antigen so the enzymes are only present when the molecule of interest is also present
To the plastic of the reaction well so the enzymes can concentrate the molecule of interest
To the capture antibody so the enzymes are only present when the molecule of interest is also present
To the detection antibody so the enzymes are only present when the molecule of interest is also present
Explanation:
Will give brainliest choose correct answer
Answer:
B.
Explanation:
Meiosis, in the shortest nutshell, is basically mitosis but twice. So instead of 2 different cells, you get 4 different cells.
Describe how the end product of digestion of fats and oils is absorbed in humans
Answer:
Hello
In the small intestines bile emulsifies fats while enzymes digest them. The intestinal cells absorb the fats. Long-chain fatty acids form a large lipoprotein structure called a chylomicron that transports fats through the lymph system.
hope this answer is correct
In the small intestines bile emulsifies fats while enzymes digest them. The intestinal cells absorb the fats.
What is the end product of digestion of fats and oils?Lipids (fats and oils) are broken down in the small intestine. The enzyme lipase is responsible for breaking down lipids into fatty acids and glycerol.
How are the end products of fat digestion absorbed?Micelles transport the end products of lipid digestion (free fatty acids and monoglycerides) to the digestive tract lining for absorption.
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Viruses CANNOT do which of the following? ((( a. Cause disease in humans / b. Cause disease in plants / c. Reproduce on their own / d. Live in bacteria )))
Answer:
C they cannot reproduce on their own. -w-
Explanation:
Answer:
The answer is C. Viruses cannot reproduce on their own.
Explanation:
Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own.
Why does the pattern recognition strategy affect prokaryotic and eukaryotic pathogens as well as hosts
Answer:
A Because all are complex cells with certain functions that cannot be greatly altered without affecting fitness.
B Because VSG switching may not be restricted to trypanosomes.
C Because all have proteins in their cell walls or cell membranes.
D None of these answers are correct.
The answer is C .Because all have proteins in their cell walls or cell membranes.
Explanation:
Pattern recognition strategy employs the use of pattern recognition receptors which are proteins for the recognition of molecules frequently found in pathogens. When they are recognized, the body then marks the cells for destruction.
Pattern recognition strategy affect prokaryotic and eukaryotic pathogens as well as hosts because all have proteins in their cell walls or cell membranes and they help in the recognition of pathogens or host for further action on them.
Why are short bones well suited to an area like the wrist? Why are long bones more suited to areas like the lower arm?
Answer:
Short bones are well suited for the wrist because they provide stability, and long bones are well suited for the arm because they can support a lot of weight.
Explanation:
Bones have different shapes and lengths. The reason for this is that their design has a specific function in the body. One way to classify bones is according to their shapes, there are short bones, long bones, flat bones, and irregular bones.
Short bones are approximately equal in length, width, and thickness. They provide stability and some restricted movements, owing to this fact, they are present in our ankles and wrists so that we can stand straight and have proper support when we use our wrist to stabilize ourselves or hold to an object.
In long bones, the length predominates over thickness and width. They work as levers being able to support a lot of weight. This is why long bones are suited for the lower arm, when the arm muscles contracts they can lift heavy things, the same happens with the bones in our legs, they are long because they have to hold the weight of the body.
Which statement describes one aspect of an earthquake's magnitude?
It is measured by the Mercalli scale.
It is based on the size of seismic waves.
O It is not usually affected by the amount of fault movement.
It is used to determine damage caused by earthquakes.
Answer:
b. It is based on the size of seismic waves
Explanation:
just did the test
The statement that describes one aspect of an earthquake's magnitude is: "It is based on the size of seismic waves."
What is an earthquake's magnitude?An earthquake's magnitude is a measure of the amount of energy released by the earthquake, and it is determined by measuring the amplitude (height) of the seismic waves generated by the earthquake. The size of the seismic waves is directly related to the amount of energy released by the earthquake, and this is used to calculate the earthquake's magnitude.
The most commonly used scale for measuring earthquake magnitude is the Richter scale, which is based on the amplitude of the largest seismic wave recorded on a seismogram. Other scales, such as the moment magnitude scale, are based on the seismic moment, which takes into account the size of the fault rupture and the amount of slip on the fault.
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When ______ is released, the subsequent receiving neuron ________ fire because that neurotransmitter is _______.
Answer:
When a neurotransmitter is released, the posterior receptor neuron has the receptor to bind to it because that neurotransmitter is a stimulator of the postsynaptic membrane.
Explanation:
The neurotransmitters that are released from the motor plate, that is, from the postsynaptic membrane to the presynaptic space, are captured by receptors of the postsynaptic membrane, which can be another neuronal structure to transmit an impulse or a muscle to be able to execute the contraction.
I leave you an image that draws up the stimulation of the postsynaptic membrane by means of a neutrotranismor, these are called as: adrenaline, norepinephrine, acetylcholine, etc.
Number 1 is the presynaptic membrane that releases the neurotransmitter (yellow balls), number 2 is the intersynaptic space, 3 is the postsynaptic membrane that in number 4 can be seen to be activated by relating to the neurotransmitter
what kind of molecule is represented in the diagram?
Answer:
The answer is option B.
TriglycerideHope this helps you
Deficiency of which material leads to anaemia ?
Answer:
iron
Explanation:
iron is present in red blood cells. Without it the RBC's start to die and are less in number. Which causes anaemia.
What does it mean that a hypothesis must be ‘falsifiable’ in order to be valid? A. It must have the ability to be proven wrong by some test. B. It must conform to experimental standards. C. It cannot be wrong, or the experiment would be pointless. D. It must be wrong the first time, or you did not learn anything.
Answer:
d ahg
Explanation:
A hypothesis should be falsifiable means it must have the ability to be proven wrong by some test. The correct option is A.
What is the meaning of being falsifiable?Falsifiability refers to the potential of a proposition, declaration, theory, or supposition to be confirmed incorrect.
This ability is required for the scientific method and hypothesis testing. In the scientific community, falsifiability is sometimes confused with testability.
Thus, the correct option is A.
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Your heart rate can be determined by counting the number of times your heart beats per minute. There are several places you can find your pulse—the rhythmic pressure wave of blood in the arteries. The radial pulse can be found by placing two fingers just below the wrist creases at the base of the thumb. Another common place to feel the pulse is the carotid artery in the neck. Place two fingers, index and middle, between the trachea and large neck muscle. Be sure to sit still without talking, and slowly move the fingers together until you can feel the blood flow. In this experiment, you’re collecting data to determine how holding your breath affects your heart rate. Write a hypothesis stating whether your heart rate will increase, decrease, or stay the same after holding your breath for 30 seconds. Also, identify the independent and dependent variables. Hypothesis: _______ Independent variable: _______ Dependent variable: _______
Answer:
The independent variable is the time and the dependent variable is the heart rate.
Explanation:
In this case a study is being performed to determine whether holding one's breath for 30 seconds leads to increasing, decreasing or similar heart rate.
The hypothesis can be defined as follows:
H₀: Holding one's breath does not effect the heart rate.
Hₐ: Holding one's breath does effect the heart rate.
A relationship is to formed between the heart rate and the time for which you are holding your breath.
So, the independent variable is the time and the dependent variable is the heart rate.
Answer:
Lab: Heart Rate
Part A: Identifying Variables
The dependent variable happens as a result of values/changes associated with the independent variable.
Independent variable: number of cigarettes smoked
Dependent variable: risk for lung cancer
Independent variable: number of sharks swimming in a coastal region
Dependent variable: number of shark attacks on humans
Independent variable: amount of milk a person drinks
Dependent variable: the strength of his or her bones
Part B: Heart Rate
Hypothesis: If I hold my breath for 30 seconds, then my heart rate will
(choose 1) increase/decrease.
Independent variable: holding my breath
Dependent variable: heart rate
Part C:
The heart rate decreases because oxygen exchange in the lungs decreases.
This depends on what you chose for heart rate in the hypothesis. If you said the heart rate decreases after holding your breath, and the results showed the heart rate decreased, then the hypothesis is supported. If you said the heart rate decreases after holding your breath, and the results showed the heart rate increased, then you refuted the hypothesis.
Heart rate can change due to an increase or decrease in activity, moving positions such as sitting and standing, and emotions.
Example: Increase in activity—jumping jacks
Hypothesis: If I do five jumping jacks, then my heart rate will increase.
Test hypothesis. You can use the average resting heart rate from the previous experiment. If you do an experiment with an increase in physical activity like jumping jacks, then your data will reflect an increase in heart rate because the body requires more energy, which requires more oxygen, increasing the overall flow of blood in the body.
Support or refute the hypothesis based on the results. The hypothesis is supported if it aligns with the observed results. The hypothesis is refuted if the results don’t match the statement based on the variables.
Testing more than one variable at a time makes it difficult to interpret the results and support or refute the hypothesis. With one variable, the results can be associated with changes to that variable. To get the most reliable data to support or refute a hypothesis, an experiment should be completed several times to see if the results show the same trends.
Explanation:
Lab: Heart Rate
Part A: Identifying Variables
The dependent variable happens as a result of values/changes associated with the independent variable.
Independent variable: number of cigarettes smoked
Dependent variable: risk for lung cancer
Independent variable: number of sharks swimming in a coastal region
Dependent variable: number of shark attacks on humans
Independent variable: amount of milk a person drinks
Dependent variable: the strength of his or her bones
Part B: Heart Rate
Hypothesis: If I hold my breath for 30 seconds, then my heart rate will
(choose 1) increase/decrease.
Independent variable: holding my breath
Dependent variable: heart rate
Part C:
The heart rate decreases because oxygen exchange in the lungs decreases.
This depends on what you chose for heart rate in the hypothesis. If you said the heart rate decreases after holding your breath, and the results showed the heart rate decreased, then the hypothesis is supported. If you said the heart rate decreases after holding your breath, and the results showed the heart rate increased, then you refuted the hypothesis.
Heart rate can change due to an increase or decrease in activity, moving positions such as sitting and standing, and emotions.
Example: Increase in activity—jumping jacks
Hypothesis: If I do five jumping jacks, then my heart rate will increase.
Test hypothesis. You can use the average resting heart rate from the previous experiment. If you do an experiment with an increase in physical activity like jumping jacks, then your data will reflect an increase in heart rate because the body requires more energy, which requires more oxygen, increasing the overall flow of blood in the body.
Support or refute the hypothesis based on the results. The hypothesis is supported if it aligns with the observed results. The hypothesis is refuted if the results don’t match the statement based on the variables.
Testing more than one variable at a time makes it difficult to interpret the results and support or refute the hypothesis. With one variable, the results can be associated with changes to that variable. To get the most reliable data to support or refute a hypothesis, an experiment should be completed several times to see if the results show the same trends.
Which explanation provides support for continental drift theory?
O Dinosaurs lived on many continents.
Coal fields match up across continents.
Tropical plant fossils were found in warm areas.
Similar rock types are found across continents.
Answer and explanation:
Among the main evidences of the theory of continental drift, we can mention the fit of the lines of the coasts of several continents, In addition to the similarity between several relief structures and rocks in different continents (such as mountain ranges found in South America and on the east coast of Africa).
There are also records of fossils of identical extinct plants, found on the African continent and also in countries like Australia, India and Brazil, for example.
Identical reptile fossils have also been found in Africa and South America, in addition to several correlations in the distribution of aquatic dinosaur fossils that lived in common areas of the ancient supercontinent.
Answer:
Similar rock types are found across continents.
Explanation:
i just know,im smart duh
Looking at the chemical reaction provided here, propose a different method that could be used to measure amylase activity: Starch + H2O = maltose
Answer:
Starch + H2O = maltose
This reaction gives the Starch and H2O as the reactants and Maltose as the product.
Amylase is an enzyme which helps in the digestion of Starch molecules and its activity can however be measured through careful monitoring of the disappearance of amylase substrate which is in this case, starch.
state and explain five uses of insects
Answer:
They help our eco system
Explanation:
PROVIDERS
Insects are in nearly every food chain. Many larger animals—birds, bats, amphibians, and fish—eat insects before they in turn are eaten by predators. The dearth of insects is suspected to be a leading cause of recent declines in bird populations.
DECOMPOSERS
Waste-eating insects unlock nutrients for use by the ecosystem that would otherwise stagnate in dung, dead plants, and carrion. Dung beetles process parasite- breeding and grass-killing cattle dung in 23 months versus the 28 it would otherwise take.
PEST CONTROLLERS
By feeding on crop-threatening pests, predatory insects perform the role of pesticides without chemicals. This cuts pest-control costs and increases yields, saving agricultural industries billions of dollars every year—while reducing toxic pesticide residue on crops.
POLLINATORS
Nearly 90 percent of flowering plant species and 75 percent of crop plant species depend on pollination by animals—mostly insects. Overall, one out of every three bites of food humans eat relies on animal pollination in the production process.
SOIL ENGINEERS
Termites (and ants) can trans- form soil in hot, dry climates. Their tunneling aerates hard ground, helping it retain water and adding nutrients. In some regions, the introduction of termites has turned infertile land into cropland within a year.
Answer:
Pollination, Food, Silk, Dyes, Dermestids for cleaning skeletons.
Explanation:
Pollination. Honeybees are among the most important of pollinators, and their efforts result in about 80% of all pollination in the United States.
Food. Honey is made by insects and can be consumed by humans.
Silk. Most silk is produced from the cocoons of the Silkworm.
Dyes. Many insects provide dyes that are used in cosmetics and for coloring cakes, medicines and beverages.
Dermestids for cleaning skeletons. Carpet beetles feed on almost anything organic and have been used in museums by technicians to clean the skeletons of mammals.
Read the label for ground beef, below. Discuss what stands out to you as a difference between the nutrition information of the vegetable you chose in question seven and the ground beef nutrition information provided in this label. Explain why you think beef is or is not necessary for a balanced diet.
Nutrition Facts
Serving Size 1 burger (151g)
Servings Per Container 6
Amount Per Serving
Calories 450 Calories from fat 340
% Daily Value
Total Fat 38g 58%
Saturated Fat 18g 90%
Trans Fat 1.5g
Cholesterol 100mg 33%
Sodium 460mg 19%
Total Carbohydrate 0g 0%
Dietary Fiber 0g 0%
Sugars 1g
Protein 26g
Vitamin C 2% Vitamin A 2%
Iron 8% Calcium 8%
Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs:
Calories 2,000 2,500
Total Fat Less than 65g 80g
Sat Fat Less than 20g 25g
Cholesterol Less than 300mg 300mg
Sodium Less than 2400mg 2400mg
Total Carbohydrate 300mg 375mg
Dietary Fiber 25g 30g
Calories per gram:
Fat 9 Carbohydrate 4 Protein 4
Answer:
Yes, Beef is necessary for a balanced diet.
Explanation:
Beef is necessary for a balanced diet because it contains high amount of energy which is required for performing different activities but too much intake of beef causes diseases because it contains high amount of cholesterol and fats. these cholesterol deposits in the vessels of the heart and prevent the normal flow of the blood which causes heart diseases like heart attack etc. So Beef is necessary for a balanced diet but in limited amount.
Which of the following is most likely to elicit the strongest, antigen-specific immune response if injected intravenously into a mouse?
1. Sterile glucose solution
2. Equine serum elbumin
3. Complement protein from another mouse
4. Red blood cells from a transfusion compatible species
5. Mouse antiboat antibodies
Answer:
Equine serum albumin is most likely to elicit the strongest, antigen-specific immune response if injected intravenously into a mouse.
Number 2 is your answer!
which proteins serves as a chemical messenger
Answer:
Neuropeptides
Explanation:
They are proteins that function as chemical messengers and are released by neurons. They contain 3 to 36 amino acids.
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