Astronomy is referred to as observational science and not primarily experimental science because it focuses on the acquisition of data from observations of astronomical objects.
When this data are acquired,they undergo analysis and using basic principles of physics.
Unlike experimental Science which seems to build knowledge through directly observing and measuring of objects and phenomenon by scientists.
A good understanding of experimentation is important here.
1) Bones tend to become brittle with age. A disease called osteoporosis causes bones to become less dense and as a result, bones break more easily. Osteoporosis is more common among older women, because they produce less of a hormone called estrogen, which aids in bone formation. Many doctors hypothesize that older women who take estrogen supplements will experience fewer broken bones. Part A: Describe how an experiment could be designed to test this hypothesis. Part B: What would be the outcome variable (dependent variable)?
Answer:
A) A Randomized Control Trial Experiment is done
B) Dependent Variable is Bone Mineral Density
Explanation:
Experimental Design:
Subjects (women) of the same age bracket (say 60-70) and having approximately the same baseline estrogen level, are recruited for the experiment, and randomly assigned into two groups of an equal number of subjects each; the test group and the control group.
The Test group is given a certain amount of estrogen supplements throughout the period of the study
The control group is given a placebo, identical to the supplements given to the test group, but without any medical significance.
Every other factor is held constant for both groups of subject throughout the period of the experiment.
After, the period of the study, the Bone Mineral Density is measured in the subjects. The Bone Mineral Density is a Radiographic Test that detects the amount of light the bone can absorb, and this is directly proportional to the health of bones. One with osteoporosis will have a less dense bone than one without Osteoporosis.
B) From the experimental design above, the independent variable is; presence or absence of estrogen supplements, while the outcome/dependent variable is Bone Mineral Density.
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One difference between weather and climate is that
weather is the day-to-day conditions, and climate is the conditions expected over relatively long periods of time
climate is the day-to-day conditions, and weather is the conditions expected over relatively long periods of time
weather is localized, and climate cours over large areas.
climate is localized, and weather cours over large areas.
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The concept of gravity an example of a scientific law. a. True b. False
Answer:
true
Explanation:
bc people call it the law of gravity
Answer:
true because what come up comes back down
A diploid organism for which n = 8 has how many chromosomes in each of its cells?
Answer:
8
Explanation:
this is because the daughter cells inherent the same and exact genetic information of that of there mother cell
Which of the following is true about radio waves?
They can penetrate dust clouds.
They reveal hot gases.
They have short wavelengths.
They have high energies.
Answer:
they can penetrate dust clouds
Explanation:
took the test
Therefore, the products of this reaction will have
________ atoms.
9
2
3
Answer:
9 atoms
applanation:
how was HMS Beagle's voyage significant to science?
answer: is B it allowed Darwin to study characteristics of similar species.
Aaron keeps texting throughout his study session. Why should he minimize such distractions?
Answer
He should because hell concentrate better and have good grades throughtout the school year
Explanation:
Answer:
to stay focused.
Which of the following "Best Management Practices" is NOT a widely used sustainable farming practice?
Answer:
Rotating crops and embracing diversity. ...
Planting cover crops. ...
Reducing or eliminating tillage. ...
Applying integrated pest management (IPM). ...
Integrating livestock and crops. ...
Adopting agroforestry practices. ...
Managing whole systems and landscapes.
The best practices for sustainable agriculture are the rotation of the crops, the maintenance of the diversity of the crops to avoid soil sterility, and the avoidance of chemical pesticides.
What is sustainable agriculture, and how does it affect soil?Sustainable farming is the most effective way to practice farming because it does not harm the soil while providing fertility, and many practices are used, such as using earthworms and compost instead of chemicals. Usage of the rotation crops; different crops should be cultivated rather than focusing on the single crop; more effective ways of watering, etc.
Hence, the best practices for sustainable agriculture are the rotation of the crops, the maintenance of the diversity of the crops to avoid soil sterility, and the avoidance of chemical pesticides.
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When you have a disease caused by a virus or bacteria,
your immune system mobilizes to fight off the invaders.
Which symptom is evidence of your immune system at work?
Answer:
Fever could be a symptom because your body will heat up to burn/kill viruses if it's bad.
Explanation:
Which student created the most accurate model?
If 35% of the bases in a region of the Drosophila genome are guanine, what percentage in that region are cytosine bases?
Answer:
The correct answer is - 35%.
Explanation:
According to the rule of Chargaff the amount of adneine is equalls to thymine and the amount of guanine is equalls to cytosine in DNA. In a double-stranded DNA Adenine pairs with Thymine and cytosine pairs with Guanine.
So, Percentage of Adenine = percentage of Thymine
and, percentage of Cytosine = percentage of guanine
we know, percentage of guanine = 35%
Thus, percentage of Cytosine will be 35% as well.
Which is not a characteristic of glycogen?
[] soluble in lipids
[] soluble in water
[] polysaccharide
[] occurs in the liver
Answer:
2
Explanation:
I I thought know what is the mean of that
Answer:
soluble in lipids
Explanation:
gkycogenis a fatty acid. fatty acids are not soluble in lipids
what mainly determines how bodies orbit other bodies in the universe
Answer:
their orbits can be exactly calculated by Newton's laws of motion and gravity. Briefly, the sum of the forces will equal the mass times its acceleration. Gravity is proportional to mass, and falls off proportionally to the square of distance. Hope this helps :)
Explanation:
What type of fault usually occurs because of compression?
A folded
B normal
C strike-slip
D reverse .
Answer:
D. reverse fault
Explanation:
Answer:
B or (and) D
sorry If its wrong
but I know its one of those or maybe both of them......?
Explanation:
the faults thats usually occur because of compression is reverse and normal
Most predators have only one species as their prey.
True
False
True
Answer:
False
Explanation:
Take any of the well known predators: lions, birds, etc
What might you expect to name a muscle that lies alongside the medial bone of the forearm, crosses the wrist, and acts to open a fist?
Answer:
Extensor Carpi radialis
Explanation:
Extensor carpi radialis longus is an important muscle out of the five main muscles that control movements at the wrist.
The muscle is long, starting from the lateral side of the humerus, and attached to the base of the second metacarpal bone of the index finger.
it helps the wrist to move the hand towards the thumb and away from the palmar side which increased angle between the palm and the fore arm front . it act to open a fist and close it.
L Sandra pushed a wooden block and it slid across the floor. The wooden block gradually slowed
down and stopped after moving 10 meters.
Why did the block stop moving?
a
The floor exerted a force that is opposite to the direction of the block's motion.
b
The block ran out of force.
с
The floor absorbs force from the block.
d
All objects stop moving because their natural state is to be still.
Answer:
I think the answer is b
Explanation:
Whats the difference between complete dominance, codominance, and incomplete dominance?
Complete Dominance:
Complete dominance occurs when one allele in a pair completely masks or overrides the expression of the other allele. In this case, the dominant allele is expressed phenotypically, while the recessive allele remains unexpressed.
The heterozygous genotype (having two different alleles) will exhibit the same phenotype as the homozygous dominant genotype (having two copies of the dominant allele).
Codominance:
Codominance occurs when both alleles in a pair are expressed equally and simultaneously in the heterozygous condition. Both alleles contribute to the phenotype without blending or overriding each other.
As a result, the heterozygous individual exhibits a phenotype that shows both traits associated with the two alleles.
Incomplete Dominance:
Incomplete dominance occurs when the heterozygous phenotype is an intermediate or blended expression between the phenotypes of the two homozygous genotypes.
Neither allele is completely dominant over the other, resulting in a third phenotype that is a mixture or combination of the traits associated with each allele.
In summary, complete dominance involves one allele fully masking the expression of another, codominance involves both alleles being expressed equally, and incomplete dominance involves an intermediate phenotype that is a blend of the phenotypes associated with each allele.
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Which of the following is not a characteristic of a reptile?
has scales
is cold-blooded
lays eggs on land
breathes with gills
Answer:
Breathes with gills
Explanation:
That would be a fish
The following is not a characteristic of a reptile is breathes with gills.
They have backbones.
Which of the following is a characteristic of reptiles?
They have backbones. Their bodies are completely covered with scales. They are cold-blooded. Reptiles produce shelled eggs or bear live young.
Thus, option "D" is correct.
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Describe what is going wrong in the body of a person with this condition that is preventing the right molecules from getting to the body’s cells. (asthma)
Answer:
Asthma is a chronic, inflammatory disease of the airways with permanent hypersensitivity. In those with a corresponding disposition (with an overly sensitive bronchial system), the inflammation leads to attacks of breathlessness as a result of acute narrowing of the airways - a so-called bronchial obstruction. This narrowing of the airways is caused by increased secretion of mucus, spasms of the bronchial muscles and the formation of edema of the bronchial mucous membrane; it is reversible through treatment. About 1 of every 10 individuals has or had asthma at least once.
The transport of an ion across a membrane against its concentration gradient can be accomplished by:
What is the form of sugar found in fruit
Answer:
fruits have fructose, glucose and a combination of the two called sucrose or table sugar.
Answer:
The form of sugar found in fruit are fructose and glucose which is called sucrose or tablesugar.
How are photosynthesis and cellular respiration related?
A. They are both performed by plants.
B. They are both performed by animals.
C. They both require energy from the Sun.
D. They both produce glucose modules.
Answer:
they both produce glucosr modules
A. They are both performed by plants.
I just did this on Ape x and this was the right answer. Hope this helps!
What is the most common type of distribution? How does this distribution benefit the species
Answer:
Clumped distribution
Explanation:
A group of organisms of one species that interbreed and live in the same place at the same time. Clumped distribution is the most common type of dispersion found in nature. In clumped distribution, the distance between neighboring individuals is minimized.
1.¿Por qué es apropiado decir que casi todos los seres vivos dependen de la energía solar?Sara acaba de dar a luz a un bebé y esta agotada. Su amiga esta estudiando biología y evaluando el proceso de la fotosíntesis. 2.Sara decide sacar a su bebe al sol, en vez de darle leche, aludiendo que el bebé puede obtener energía de la luz solar. ¿Es esta una buena idea? ¿Por qué no puede el bebe utilizar la energía solar para producir ATP? No olvides incluir los organelos y procesos necesarios para la producción de ATP y de identificar al bebé de Sara como autótrofo o heterótrofo. En tu respuesta, contesta las siguientes preguntas. ¿Cuales son las diferencias entre la fotosintesis y la respiración celular? ¿Por qué no pueden los seres humanos procesar la energía solar y convertirla en energía química?
Answer:
1. La energía solar es la fuente principal de energía utilizada por organismos autótrofos para producir energía en forma de ATP a partir del proceso de fotosíntesis y almacenar esta energía en forma de enlaces químicos presentes en nutrientes orgánicos específicos. Los organismos autótrofos son fundamentales en la cadena alimenticia porque ellos representan la principal fuente alimento de organismos heterotrófos, con lo cual sustentando toda la vida en la tierra.
2. No, esta no es una buena idea porque los animales y seres humanos (incluyendo el bebe de Sara) son organismos heterótrofos, es decir, obtienen energía mediante el proceso de respiración celular, a diferencia de organismos autótrofos que almacenan energía a partir del proceso de fotosíntesis el cual requiere de la utilización de la energía solar. Tanto en la fotosíntesis como en la respiración celular los organismos producen una molécula llamada Adenosina trifosfato (ATP), la cual es considerada como la moneda energética de la célula porque sus enlaces químicos almacenan energía la cual es utlizada para diversos procesos celulares. Los autótrofos fotosintéticos poseen cloroplastos que son los orgánulos celulares encargados de capturar energía lumínica para sintetizar ATP, el cual es posteriormente utlilizado para sintetizar carbohidratos. Por otra parte, en organismos heterótrofos, las mitocondrias son las organlelas encargadas de producir la mayor cantidad de ATP generada durante el proceso de respiración celular, el cual requiere del combustible metabólico provisto por los alimentos.
Which of the following is a consequence of the
zebra mussel population in the great lakes
Answer:
They clog water intakes for municipalities and industries, foul boat hulls, motors, water-related equipment and shipwrecks. They can decrease property values. Sharp shells can litter beaches, cut feet and affect recreation and tourism.
Explanation:
egde 2020
How can you tell which side of the heart is the ventral surface?
Not from the internet please
Answer:
In general, Dorsal side means Back side and Ventral side means front side. Means, the back side of heart will be Dorsal and Front side toward our chest will be ventral.
Explanation:
Answer:
The ventral surface is on the left pulmonary vein because the vein will be facing upward.
Explanation:
. There are many diseases that affect signal transmission along neural pathways. These includemultiple sclerosis (MS), myasthenia gravis, and amyotrophic lateral sclerosis (ALS or 'LouGehrig's Disease). Often, a component of these afflictions is a malformation or degenerationof the myelin sheath. MS is a demyelinating disease, which means that the axons of neuronsare intact but the myelin sheaths are damaged. Why would loss or damage to the myelinsheath be a problem for signal transmission, even if the axon was intact
Answer:
In neurons that are enveloped by myelin sheath, the nerve stimulus or neuronal action potential is transmitted in a saltatory way, that is, this action potential jumps in the spaces not surrounded by the myelin sheath and it is in this way that it is transmits much more efficient and faster.
Explanation:
Myelin neurons are those that are covered by myelin sheaths, this sheath is formed mainly by fatty acids, these fatty acids generate an alternate isolation along the axon so that the stimulus diffuses through the bare areas where they will have ionic channels premises in order to generate the potential for action.
If this myelin sheath disappears, not only is the response slower, but it is rendered incapable because an axon that does not have ion channels to spread the signal is discovered in the external environment.
what is the Literal Sense of the bible story?
Answer:
The process used by scholars to discover the meaning of the biblical text
Explanation:
Literal sense meaning- conveyed by the words of Scripture and discovered by exegesis, following the rules of sound interpretation
