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Related Questions
A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of laboratory rats a daily diet of precisely 125.6 units of niacin and 5,400 units of retinol. She uses two types of commercial pellet food. Food A contains 0.86 units of niacin and 30 units of retinol per gram. Food B contains 0.66 units of niacin and 40 units of retinol per gram. How many grams of each food does she feed this group of rats each day
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Answer:
- 100 grams of food A (x)
- 60 grams of food B (y)
Explanation:
According to this question, the group of laboratory rats are being fed a daily diet of:
- 125.6 units of niacin and 5,400 units of retinol
Let x represent the number of grams needed for food A.
Let y represent the number of grams needed for food B.
This means that:
Food A: Niacin = 0.86x, Retinol = 30x
Food B: Niacin = 0.66y, Retinol = 40y
Since there are 125.6 units of niacin fed to the rats in total, then;
0.86x (A) + 0.66y (B) = 125.6
Since there are 5400 units of retinol fed to the rats in total, then;
30x (A) + 40y (B) = 5400
Solving these two equations simultaneously using elimination method:
0.86x (A) + 0.66y (B) = 125.6 ........(eqn 1)
30x (A) + 40y (B) = 5400 ............ (eqn 2)
Multiply eqn 1 by 30 and eqn 2 by 0.86
30 × 0.86x + 0.66y = 125.6
0.86 × 30x + 40y = 5400
25.8x + 19.8y = 3768 ............ (eqn 3)
25.8x + 34.4y = 4644 ........... (eqn 4)
Subtract eqn 3 from eqn 4
14.6y = 876
Divide both sides by 14.6
y = 876/14.6
y = 60
Substitute value for y (60) into eqn 2
30x + 40y = 5400
30x + 40(60) = 5400
30x + 2400 = 5400
30x = 5400 - 2400
30x = 3000
x = 3000/30
x = 100
Therefore, she feeds the group of rats 100grams of food A (x) and 60 grams of food B (y).
what is the role of microorganisms in food preservation?
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Answer:
Preservation usually involves preventing the growth of bacteria, fungi (such as yeasts), and other microorganisms, A number of methods of prevention can be used that can either totally prevent, delay, or otherwise reduce food spoilage.
Explanation:
¿De acuerdo a las preferencias alimenticias de los estudiantes, según la encuesta, qué tipo de hidratos de carbono no han sido preferidos en su alimentación? ¿Según las características de estos carbohidratos, qué beneficios provocan en la salud humana?
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What is affected by natural selection?
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Answer:
variation
Explanation:
Through this process of natural selection, favorable traits are transmitted through generations. Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.
Which front is most likely to last for days?
A Stationary Front
B Warm Front
C Cold Front
D Occluded Front
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Answer: Occluded front
Explanation:
Rivers are more important to the water cycle than streams.
Please select the best answer from the choices provided
OT
OF
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Answer:
this first option is the corect
This is a false statement. (:
5
5. What happens to energy when chemical bonds are formed? You w
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Answer:
The total energy input or output of a reaction equals the energy released in forming new bonds minus the energy used in breaking the original bonds. If it takes more energy to break the original bonds than is released when the new bonds are formed, then the net energy of the reaction is negative
Explanation:
AG CLASS
Which of the following distinguishes the horticultural professional consulted regarding the best standard practices for dealing with a fungus outbreak in a greenhouse?
horticultural therapist
floriculturist
viticulturist
phytopathologist
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Answer:
phytopathologist me thinks...
if you see this stan ateez <3
Farmer Alan wants to improve his dairy herd's milk yield. Which cow and bull should he breed together for the next generation? Explain your answer
Answer: The ones that produce the most milk because once you start breeding them, over time ( generations ), the more offspring that will produce high amount of milk.
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Answer:
Explanation:
You answered your own question wth :')
Question 10 (1 point) What muscle helps the bladder to contract when the bladder is emptyine?
epithelium
peritoneum
Orugae
detrusor
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The detrusor muscle's primary function is to contract during urination in order to transfer urine out of the bladder and into the urethra. The detrusor muscle relaxes, allowing urine to be stored in the urinary bladder.
What are sister chromatids?
O the matched set of two chromosomes
O the protein structures moving the chromosomes
O the middle region of a replicated chromosome
O he two identical copies of one chromosome
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Answer:
hi how are you doing today Jasmine
How many chromosomes are in each of Chester's sperm cells?
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What is an genotype
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Answer:
Genotype refers to genetic makeup of an organism.
The genetic constitution of a cell, an individual, or an organism. The genotype is distinct from the expressed features, or phenotype, of the cell, individual, or organism.
hope it helps
Which species list includes animals that would most likely be found in a taiga biome?
A. zebra, cheetahs, and grasses
В.
lynxes, moose, and pine trees
C.
camels, rattlesnakes, and cacti
D
parrots, frogs, and bamboo trees
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Answer:
B. Lynxes, Moose, and Pine trees
On May 18,1980, Mount St. Helens in the state of Washington erupted with the force of a hydrogen bomb. The volcano had been dormant for over 120 years, but now 57 people were dead; forests and lakes were totally destroyed, including nearby Spirit Lake, which became a mud hole. The blast leveled trees in areas over 10 miles from the crater and ash deposits suffocated life on the mountain. However, within weeks, mammals that had taken shelter underground started to appear in the area, and now, over thirty years later, many areas of the mountain are colonized with a large variety of plant and animal life. How does an area move from a sterile, barren wilderness to one full of life
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Answer:
The correct answer is - Ecological Succession.
Explanation:
Ecological succession is a change in the species or biodiversity over time by the increase in the vegetation or growth of the community. This takes place after a natural disaster or any event that causes nudation or complete removal of species or comunities from an area such as volcanic eruption.
It starts with nudation then invaded with primary successors and then ecological conditions lead to invading more species and the third stage would be competition and interaction between a component of the species and vegetation then stable.
Rain cannot occur until ____?
A. the air becomes saturated with water vapor
B. the water vapor exceeds an absolute humidity of 80 ppm
C. a warm front meets a cold front
D. clouds reach an altitude of 1000 ft
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Answer:
A. the air becomes saturated with water vapor
Explanation:
The saturated water vapor air forms clouds ( nimbus clouds ) which hold that vapour at a low pressure
Answer:
A. The air becomes saturated with water vapor
Explanation:
Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water. Dew point is the temperature at which condensation happens.
Elevation is to land as _______________ is to water.
rain
river
depth
moisture
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Answer:
depth
Explanation:
Explain E.O. Wilson's theory of Island Biogeography as it applies to environments other than islands physically
surrounded by water.
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Answer:
The theory of E.O. Wilson's theory of Island Biogeography was originally developed as island biogeography, to explain species richness of actual islands, surrounded by water.
It proposes that the number of species found in an undisturbed environment is determined by immigration and emigration. According to him, the species richness will be the same if this island will have an equal number of the immigration and extinction or emigration of species.
I’ll mark brainlist
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Answer:
Opinions
Explanation:
Hope this helps
what is one way that people make blue pigment? How else do you think the color blue might be made?
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Answer: Some people use minerals such as Lapis Lazuli, you can also get a blue pigment from some plants.
Explanation:
Think about it
1. Living organisms are composed mostly of four elements: ______________ , _______________, ____________, and _______________ .
Recycling in the Biosphere
2. Unlike the _____ -way flow of energy, matter is ____________ within and between ___________ .
3. What are biogeochemical cycles?
4. What three processes are involved in the cycling of matter?
A.
B.
C.
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Answer: 1. Carbon, hydrogen, oxygen, and nitrogen, 2. high, measured speed. 3. Biogeochemical cycle, any of the natural pathways by which essential elements of living matter are circulated. The term biogeochemical is a contraction that refers to the consideration of the biological, geological, and chemical aspects of each cycle. 4. These three processes move water into the atmosphere. Evaporation occurs when water on Earth's surface changes to water vapor.
Explanation:
During the water cycle, gravity assists with:
A. water vapor floating upwards
B. clouds becoming full of water molecules and more dense
C. precipitation
D. oceans
Answers
Answer:
B
Explanation:
Clouds are like fog and it absorbs the molecules and becomes a defense
Using the key from question 5, match the appropriate structures with the descriptions given below.
1. site of regulation of body temperature and water balance; most important autonomic center
2. site where medial fibers of the optic nerves cross
3. located in the midbrain; contains reflex centers for vision and hearing
4. responsible for regulation of posture and coordination of complex muscular movements
5. important synapse site for afferent fibers traveling to the sensory cortex
6. contains autonomic centers regulating blood pressure, heart rate, and respiratory rhythm, as well as coughing sneezing, and swallowing centers
7. large fiber tract connecting the cerebral hemispheres
8. relay stations for olfactory pathways
9. canal that connects the third and fourth ventricles
10. portion of the brain stem where the cerebral peduncles are located
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Answer:
1. Hypothalamus
2. Optic chiasma
3. Corpora quadrigemina
4. Cerebellum
5. Thalamus
6. Medulla oblangata
7. Corpus Collosum
8. Fornix
9. Cerebral aqueduct
10. Midbrain
Explanation:
The hypothalamus is a small central region of the brain that regulates body temperature by responding to both internal and external stimuli and also produces the antidiuretic hormone (ADH) in order to trigger the reabsorption of water in the kidneys. The optic chiasma is a special sensory structure located along the visual pathway, directly in front of the hypothalamus, which is crucial to vision. The corpora quadrigemina, also known as quadruple bodies, are reflex centers located in the mesencephalon (midbrain) that regulate the position of the head and eyes in response to somatic stimuli. The cerebellum is a part of the brain located behind the top part of the brain stem which is involved in motor movement regulation and balance control. The thalamus (massa intermedia) is a paired gray matter structure found near the center of the brain that plays vital roles associated with sensory and motor functions of the brain. The medulla oblangata (medulla) is a structure located at the base of the brain involved in the regulation of sensory, motor, and mental functions (e.g., breathing, pain modulation, etc). The corpus callosum (the callosal commissure) is a bundle of nerve fibers that connects the two hemispheres of the brain. The fornix (agenesis of the corpus callosum) is a large interhemispheric commissure that connects neurons in the right and left hemispheres. The cerebral aqueduct (aqueduct of Sylvius) is a narrow channel that connects the third and fourth ventricles, thus allowing the cerebrospinal fluid to flow between the ventricles. Finally, the midbrain o 'mesencephalon' is a small region located in between the forebrain and hindbrain, which is involved in auditory and visual processing, eye movement and coordination.
Which of the following particles has no charge?
A. Ion
B. Proton
C. Neutron
D. Electron
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Correct me if I’m wrong
Sketch a replication fork of bacterial DNA in which one strand is being replicated discontinuously and the other is being replicated continuously. List six different enzyme activities associated with the replication process, identify the function of each activity, and show where each would be located on the replication fork. In addition, identify the following features on your sketch: DNA template, RNA primer, Okazaki fragments, and single-stranded DNA binding protein.
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Answer:
DNA Helicase is the enzyme that unwinds the double-stranded DNA into two single strands forming a replication fork.
DNA topoisomerase II or Gyrase is the enzyme responsible for relieving or relaxing the topological stress caused by the unwinding of DNA double strands.
DNA polymerase III is the primary replication enzyme. It is responsible for adding deoxyribonucleotides to the RNA primer both in the continuous or leading strand synthesis as well as in the discontinuous or lagging strand synthesis of DNA.
Primase is the enzyme responsible for the synthesis of the RNA primer (a short segment of RNA) to which deoxyribonucleotides are added.
DNA polymerase I is responsible removing and replacing the RNA primers with DNA in the newly DNA strands.
DNA Ligase is the enzyme responsible for sealing the gaps in the DNA due to broken phosphodiester bonds after the removal of the RNA primer.
Explanation:
The sketch of the replication fork of bacterial DNA showing where one strand is being replicated discontinuously and the other is being replicated continuously, as well as the different enzymes involved and their location of activity is found in the attachment below.
DNA replication occurs in the 5' to 3' direction by DNinA polymerases.
Continous DNA replication occurs in same direction as the direction as the replication fork, in the 5' to 3' direction.
The discontinuous replication occurs in fragments of DNA known as Okazaki fragments which are then ligated by DNA ligase.
The diagram shows a grassland food web.
Which two organisms share the same trophic level?
O hawk and mouse
O lizard and rabbit
O mouse and rabbit
O grass and grasshopper
Answers
both the mouse and rabbit eat the grass
TRANSLATE the mRNA into amino acids:
AUG CAC UGU CCU UUC GCU GAC CCC UAA
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Answer:
sorry brojjjjhhhfdeewa
Which trophic level does the stingray belong to?
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Answer:
Secondary consumers with a TL <4.00 represented 84% of the species examined, with the remaining 12 species (16%) classified as tertiary consumers (TL ≥4.00). Tertiary consumers included electric rays (Torpedo, 3 spp. and Hypnos, 1 sp.), butterfly rays (Gymnura, 4 spp.), stingrays (2 spp.)
Explanation:
I think but sorry if it was wrong.
Which structures of the digestive system, aside from the small intestine, release substances that help break down
food in the small intestine?
stomach and liver
liver and large intestine
pancreas and liver
large intestine and pancreas
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Answer:
pancreas and liver
Hope this helps!
Answer:c
Explanation:
What would most likely happen if there were no condensation stage in the water cycle
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Answer:
No precipitation.
Explanation:
if there were no condensation stage in the water cycle then there will be no precipitation and as a result the water cycle will stop. Condensation is the change of water from its gaseous state or water vapor into liquid water. This condensation process occurs in the upper atmosphere where the temperature is lower as compared to the earth surface so the water vapors turn into liquid state and will fall from the sky in the form of rainfall and snowfall so we can say that no condensation will leads to no precipitation.