Answer:
B - 2,250 kcal
Explanation:
When transferred from lizards to snakes 2,250 kcal is lost due to only 10% of energy being transfeered to each tropic level, hence option a is correct.
How energy is transferred?
At any given trophic level, only 10% of the energy is transmitted to the next level the remaining 90% is primarily wasted as heat during metabolic activities.
The amount of energy transferred from one trophic level to the next is typically only about 10%, so 2,250 kcal energy is lost when transferred from lizards to snakes.
The number of trophic levels that an ecosystem can maintain, as well as the energy it can store, is constrained by what is known as the 10 percent rule.
Therefore 10% is transferred to the next trophic level, hence 2,250 kcal is lost when transferred from lizards to snakes.
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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.
select the choices that are true statements of the similarities between dna and rna
Answer:
They are both acids
DNA is deoxyribonucleic acid, while RNA is ribonucleic acid.
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.
What is the pathway of air into the body?
Answer:
mouth and or nose
Explanation:
air enters the respiratory system through the nose and mouth and passes down the throat and through a voice box.
Answer:
mouth or nose → nasal cavity → pharynx or throat → larynx or voice box → trachea → bronchi → lungs
Explanation:
edge
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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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.
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.
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
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.
Most hurricanes will originate a. near the North Pole. b. in the equatorial region. c. when the water and air are cold. d. below the ocean’s surface currents.
Answer:
The answer is c.
Explanation:
Answer:
c
Explanation:
How does music affect plant growth? To answer this question
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:
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
The term race currently has only biological connotations and is without any social significance.
A. True
B. False
Answer:
false
Explanation:
answer
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
What precautionary measure should be taken when storing oil and fats at home?why homogenization and pasteurization of milk are performed at an industrial scale?what are the possible hazards that come across while determining protein content of the meat by kjeldhal appratus?
Answer:
chutiya bhanchod gand mar du teri
A is an agent that causes disease. All are pathogens.
1. which pair of bacteria can be differentiated by oxidase test?
A. Pseudomonas and E. coli
B. Salmonella and Proteus
C. Proteus and E. coli
D. Shigella and Salmonella
2. Colonies of which color would you expect on HE agar if shigellosis is suspected?
A. Pink
B. Red with black center
C. Red without black center
D. Green with black center
E. Green without black center
3. Colonies of which color would you expect on HE agar if Enterococcus sp. is suspected?
A. Pink
B. Salmon/orange
C. Red with black centers
D. Green with black centers
E. None of the above
Answer:
1. A. Pseudomonas and E. coli
2. B. Red without black center
3. B. Salmon/orange
Explanation:
Pseudomonas is referred to as an oxidase positive bacteria while E. Coli is an oxidase negative bacteria. The use of the oxidase test will be helpful in the differentiation of the two Bacteria according to their oxidase activity/properties.
Colonies of Red without black center color is what is expected on HE agar if shigellosis is suspected.
Colonies of Salmon/Orange color is what is expected on HE agar if Enterococcus sp. is suspected.
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.
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
what kind of molecule is represented in the diagram?
Answer:
The answer is option B.
TriglycerideHope this helps you
Gases are formless fluid that expands to occupancy the space or enclosure they are contained in ? True or false
Answer:
true
Explanation:
Gases are in fact formless liquid that expands to occupancy the space or enclosure they are contained in.
Which of the following group of bones in the human body categorized according to shape is correct?
Group of answer choices
skull bones-flat bones
arm and leg bones-short bones
coxal bone- short bone
wrist and ankle -long bones
Answer:
The answer is skull bones-flat bones
Hope this helps you
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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Indicate the steps of eukaryotic DNA replication in order, from when a germ cell enters gap 1 (G1) phase to the cell cycle termination.
a. RNA primers are added to provide a 3 end for elongation.
b. RNA is replaced with DNA and lagging strands are joined,
c. Prereplication complex forms at one of many origins of replication.
d. DNA polymerase synthesizes both the leading and lagging strands from 5' to 3'.
e. Active telomerase can extend the lost telomere region.
f. The initiation complex creates an active replication fork as helicase unwinds DNA.
Answer:
Explanation:
1. Prereplication complex forms at one of many origins of replication.
2. The initiation complex creates an active replication fork as helicase unwinds DNA.
3. RNA primers are added to provide a 3 end for elongation.
4. DNA polymerase synthesizes both the leading and lagging strands from 5' to 3'.
5. RNA is replaced with DNA and lagging strands are joined.
6. Active telomerase can extend the lost telomere region.
All these process are the steps involved in the replication of DNA. The replication of DNA involves the biological production of two identical copies of DNA from one original DNA molecule. This is a very important biological process of life as it is involved in the inheritance pattern of life. It is essential in that the 2 daughter cells formed must contain the same sets of chromosome as the original parent.
You are writing an article summarizing the research you have conducted in your particular field of psychology. You have decided to present your data in a series of charts and graphs. In which section of a standard scientific article would these charts and graphs most likely appear?
Answer:
The section of a scientific article that graphs and tables are likely to appear in is called "Results".
Explanation:
The sections of a kinetic article are: Title, Authors and Affiliation, Abstract, Introduction, Methods, Results, Discussion, Acknowledgments, and Literature Cited.
The section called "results" is where the researcher will show what he was able to discover through his scientific experiment. This section usually contains a lot of information and a lot of relationships with parts of the experiment and with other sections of the article. For this reason, in order to be able to present everything quickly and dynamically, it is normal for the researcher to present this section through graphs and tables.
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.
In which process does the cell use a vesicle to move molecules into the cell
Answer:
Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell.
Don't write Endocytosis !!!
Hope this helps !
Explanation:
Answer:
it's Endocytosis
the other answer is wrong i just did the quiz
Explanation:
Many cells produce chemicals called _______, hormone-like substances that impact inflammation and reproduction.
Answer:
vesicles
Explanation:
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