Which element IS found in proteins, but NOT found in carbohydrates?
Which microscope would be used to see pollen found on a suspect side by side with pollen from a crime scene?
A Scanning Electron Microscope would be ideal for analyzing pollen from a crime scene due to its high resolving power, providing a highly detailed view of the grains, and allowing for a more accurate comparison.
Explanation:
To analyze something as minuscule and detailed as pollen from a crime scene, a Scanning Electron Microscope would be ideal. This type of microscope allows for an extremely detailed view of the specimen. This is due to the fact that electron wavelengths are considerably shorter, up to 100,000 times than the wavelengths of visible-light photons, as shown in Figure 6.1 with an image of pollen. This allows for a detailed comparison of the pollen from a suspect and a crime scene side by side as their detailed features, like the sizes, shapes, and surface patterns, would be distinctly visible.
However, it is worth mentioning that different types of microscopy can be used depending on the specific requirements of the examination. For instance, brightfield microscopy offers clear images with good contrast, while darkfield and phase-contrast microscopes can provide further details as they increase contrast and make more intricate structures visible. But for the case of comparing pollen grains, electron microscopy stands as the most effective option due to its high resolving power.
Learn more about Scanning Electron Microscope here:https://brainly.com/question/29726640
#SPJ12
Which factors may help begin an ice age? Select all that apply.
A. volcanic eruptions
B. Earth's revolution around the Sun
C. increased oxygen in Earth's atmosphere
D. the clustering of continents near the poles
E. increased dust particles in Earth's atmosphere
F. increased carbon dioxide in Earth's atmosphere
Answer:
A. volcanic eruptions
D. the clustering of continents near the poles
E. increased dust particles in Earth's atmosphere
Explanation:
Ice age is the name given to the period where thick layers of ice cover large areas of the earth. These periods can last thousands of years and dramatically change the characteristics of the planet. There have been some very significant ice ages in the history of the planet. In the late nineteenth century, much research showed that there were several ice ages that alternated with interglacial periods.
Many scientists believe that we will live a new ice age in 2050. This ice age, though expected shortly, will bring catastrophic results to the life we know. One certainty we have is that if this ice age occurs, it will be caused by human interference with nature and all the degradation that man has caused to the environment. In addition, this ice age is likely to be triggered by the factors likely to cause an ice age: volcanic eruptions, clustering of continents near the poles and increased dust particles in Earth's atmosphere
During which period of pregnancy may drug exposure cause meromelia, cleft lip, and enamel hypoplasia?
Meromelia(Malformed limbs): The critical period
is 20-36 days after fertilization or the first trimester when the
organs are just beginning to develop. Drugs such as thialides should be
avoided.
Cleft Lip with/without Cleft Palate: Usage of drugs such as topiramate
and valproic acid, during the first 3 months of gestation increases the
risk of having a baby with this defect.
Enamel Hypoplasia(teeth enamel is hard but thin): The use of tetracyclines
can cause this, as well as yellow-to-brownish discoloration of the teeth.
It is important to avoid such drugs during the 2nd and 3rd trimesters.
Of all prescription drugs, the most often abused are
Explain why a forest fire is considered to be a density-independent limiting factor.
A forest fire is considered to be a density independent limiting factor because there will be no effect in the outcome whether there are organisms or however many are there involved in which the forest fire can’t be changed regardless of how many are the population is—this pertains to the density independent.
A forest fire is a density-independent limiting factor, meaning it affects population mortality irrespective of population density. Unlike density-dependent factors, which vary based on population size, density-independent factors like forest fires will have the same effects regardless of how many individuals are present. These factors are essential to understanding population regulation.
Explanation:A forest fire is considered to be a density-independent limiting factor because it affects the mortality of a population regardless of its density. This means that the forest fire will cause death and destruction independent of whether the population density is high or low. For example, if a deer population inhabits the forest, individuals will be killed in the fire, irrespective of how many deer are present in the area.
Density-independent factors, like a forest fire, typically are abiotic and can include things like weather conditions, natural disasters, and pollution. Contrast this with density-dependent factors, which have different effects depending on the population density. One example of a density-dependent factor is food availability, which becomes a limiting factor when a population, such as caterpillars, becomes too large for the food supply to support.
It's crucial to understand the distinction between these two factors and how they interact in order to comprehend how an environment can regulate its population numbers. Indeed, understanding situations in which density-dependent and density-independent factors interact is especially complex and important. For instance, a dense population reduced by an environmental factor like a forest fire may recover differently than a sparse population.
Learn more about Density-Independent Limiting Factor here:https://brainly.com/question/29843945
#SPJ11
More than 75% of the total ocean floor is considered ____
How do webbed feet help ducks survive?
A.) Webbed help ducks maintain homeostasis.
B.) Webbed feet help ducks keep their balance on land
C.) Ducks are birds, and many birds have webbed feet
D.) Webbed feet help ducks more efficiently thru water
Why do many desert plants have small leaves?
A.) Small leaves protect desert plants form pollution
B.) Leaves that have a small surface area lose less water
C.) Deserts are cold and small leaves help hold in heat
D.) Small leaves protect desert plants from animals that eat plants
How do a cat's teeth help the cat catch mice?
A.) Cat's teeth are sharp and help the cat keep a secure hold on its prey
B.) Cat's teeth are white and attract mice
C.) Cat's teeth are large and help the cat catch large animals
D.) Cat's teeth are not visible to mice at night
Answer:
ok so FIRST QUESTION IS D
SECOUND IS B AND
LAST ONE IS A
Explanation: hope this helps :3
The outer surface of a cell that controls what enters and leaves is called
It is necessary to heat fix bacteria to the microscope slide. what happens when you pass the microscope slide through a flame a few times?
A lab rat had part of its hypothalamus destroyed. the rat seems to have lost all interest in food and won't eat even when food is available. it would appear that part of the _____ has been destroyed.
Final answer:
Damage to the lateral hypothalamus (LH) in a lab rat's brain likely caused the loss of interest in food, as the LH is integral for initiating hunger.
Explanation:
The lab rat that had part of its hypothalamus destroyed and subsequently lost all interest in food likely had damage to its lateral hypothalamus (LH). The LH is a crucial area in the brain for initiating hunger. Lesions in the LH can cause animals to lose their desire to eat, leading to self-starvation if not force-fed. Conversely, stimulating the LH can induce eating behavior when food is present. It contrasts with another region of the hypothalamus, the ventromedial hypothalamus (VMH), which is responsible for signaling satiety or the feeling of fullness that stops eating behavior.
What part of the hair needs to be collected in order to consider hair class evidence?
In forensic analysis, the root of the hair needs to be collected in order to consider it as class evidence.
Explanation:In order to consider hair class evidence, the root of the hair needs to be collected. The root contains DNA material that can be used for identification purposes. Hair shafts alone cannot provide sufficient information for forensic analysis.
Learn more about Forensic analysis here:https://brainly.com/question/33604028
#SPJ6
Where does glycolysis occur?
A) cytoplasm
B)mitochondrion
C) nucleus
D) cell membrane
How would you distinguish a just action from an unjust action?
A just action is having to do a certain action that is right or means of having to follow the law that is established and without having to break the rules while an unjust action is having to perform an action or behavior that are named or labelled to be a wrong as a matter of doing bad things or breaking the rules that should be followed.
The body structure of a reef -building coral consists of a hard skeleton covering soft tissue. What element is most common in the corals soft tissue?
Concept covered: recap and review answer each question to complete this review of all the stages of respiration
Cellular respiration involves converting energy from nutrients into ATP with waste products being released, occurring over three stages: glycolysis, the Krebs cycle, and the electron transport chain. The mitochondrion is vital for these processes. Respiration refers to breathing and includes ventilation and gas exchange, differing from cellular respiration, which is a metabolic process in cells.
Explanation:Cellular respiration is a set of metabolic reactions used by cells to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The three stages of cellular respiration are glycolysis, the citric acid cycle (Krebs cycle), and the electron transport chain.
The mitochondrion is a double-membraned organelle that plays a critical role in cellular respiration by hosting the citric acid cycle and electron transport chain. The large surface area provided by its highly folded inner membrane is critical for the reactions of cellular respiration that produce ATP.
For an organism lacking mitochondria, it would use a form of respiration such as fermentation, which does not require mitochondria and occurs in the cytoplasm.
The water vapor that condenses on a cold window pane when you exhale comes from the lungs as they expel water vapor that is a byproduct of cellular respiration.
Differentiating Between Respiration and Cellular Respiration
Respiration generally refers to breathing which involves the inhalation of oxygen and exhalation of carbon dioxide. It consists of two parts: ventilation and gas exchange. Cellular respiration, while related to breathing, refers explicitly to the biochemical process within cells that converts nutrients into energy.
Aerobic respiration is a type of cellular respiration that uses oxygen to produce ATP. The overall chemical reaction for aerobic respiration is C6H12O6 (glucose) + 6O2 (oxygen) → 6CO2 (carbon dioxide) + 6H2O (water) + energy (ATP). The four stages of aerobic respiration are glycolysis, the transition reaction, the Krebs cycle, and the electron transport chain and oxidative phosphorylation.
The existence of extensive scalded skin syndrome does not indicate that staphylococcus is growing in all the affected areas. why not?
________ are the most commonly used species for animal research. psychology
Mice, rats, and birds are the most commonly used species for animal research in psychology.
Explanation:The most commonly used species for animal research in psychology are mice, rats, and birds.
These animals offer acceptable substitutes for human participants in research that would be considered unethical. According to the American Psychological Association, about 90% of all animal research in psychology uses rodents and birds.Learn more about Animal Research in Psychology here:https://brainly.com/question/32816777
#SPJ11
The enzyme amylase in human saliva breaks down starch polymers into smaller sugar units. however, it cannot break down cellulose polymers. both are made of glucose monomers, but in cellulose the monomers are linked together in a different shape than in starch. why can't amylase digest cellulose
Amylase cannot digest cellulose because the beta 1-4 glycosidic bonds in cellulose have a different stereochemistry than the alpha 1-4 glycosidic bonds in starch. While amylase works on starch, it is not configured to interact with cellulose, which instead passes through the digestive system as fiber.
The enzyme amylase is responsible for the breakdown of starch polymers like amylose into smaller sugar units like glucose and maltose. Amylose is a polysaccharide made of glucose monomers linked by alpha 1-4 glycosidic bonds. Salivary amylase can cleave these specific bonds, which are in a 'straight' configuration, allowing for the digestion of starch starting in the mouth and continuing in the small intestine.
However, cellulose is a different kind of polysaccharide also made of glucose monomers, but here, the monomers are linked by beta 1-4 glycosidic bonds. This different bond results in a 'flipped' stereochemistry compared to the alpha linkage in starch. Enzymes, including amylase, are highly specific and sensitive to the structure of the molecules they act on. As a result, the enzyme amylase cannot break the beta 1-4 glycosidic bonds in cellulose due to their different stereochemistry. While amylase facilitates starch digestion, it is ineffective on cellulose, which passes through the human digestive system as dietary fiber. Other enzymes such as cellulases found in nature can break down cellulose, but humans do not produce these enzymes.
what substance is analogous to a factory manager?
suppose four atoms of oxygen gas and two atoms of hydrogen gas are combined. Determine how many atoms of water and oxygen gas will be produced.
Answer:
1 Water; 3 free oxygen
Explanation:
Since the water molecule (H₂O) consists of two hydrogen atoms and one oxygen atom.
By combining four oxygen gas atoms to two hydrogen gas atoms, as described in the question, covalent bonding between the two hydrogen atoms with one oxygen will occur, leaving three free oxygen atoms for further reactions.
The reaction that forms water molecules can be described as follows:
2H₂ + O₂ = 2H₂O
A high rate of evaporation and condensation in the water cycle can most likely cause
a. floods
b. blizzards
c. earthquakes
d. hurricanes
A high rate of evaporation and condensation in the water cycle can most likely cause hurricanes. This is because these conditions imply the transfer of a lot of heat energy, which can fuel the development of severe weather systems like hurricanes.
Explanation:A high rate of evaporation and condensation in the water cycle can most likely cause hurricanes (option d). The water cycle involves the continual movement of water on, above, and below the surface of the Earth. During this cycle, water changes states among liquid, vapour, and ice. As part of this process, heat is transferred from the Earth's surface to the atmosphere, creating conditions for weather phenomena. When there is a high rate of evaporation and condensation, it means there is a lot of heat energy being transferred which can spur the development of severe weather systems like hurricanes. Hurricanes are essentially large, organized systems of thunderstorms and require warm, moist air as fuel, which is provided by the high rates of evaporation and condensation.
Learn more about Evaporation and Condensation here:https://brainly.com/question/956180
#SPJ12
What is the expected heart rate when a heart is removed from a living body?
science cannot be used to answer questions of good or evil. true or false
Answer:
The correct answer is - True.
Explanation:
Science is a method that explains any natural phenomenon by repeatedly experimenting and observation. It includes different branches in it such as math, biology, and physics.
Science can not answer if any process or phenomenon is evil or good. It can not answer ethical questions such as GMOs are ethical or cloning is ethical. It only can give an idea about the repercussion of a particular question on the base of facts.
Thus, the correct answer is - true.
The book uses the example about "no animals are allowed in the airport terminal except assistance animals" to illustrate the point that ________.
What happens to ground water when the rate of infiltration is less than the rate of water being pumped out of the ground
Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this? Increase the intensity of red light. Decrease the intensity of red light. Use a different colored light that has a higher frequency. Use a different colored light that has a lower frequency.
Answer:
long story short it's C !
Explanation:
I got it right :)
Which of the following best describes the relationship between the structure of the cell membrane and its function?
A) The cell membrane folds upon itself easily, which facilitates cellular reproduction by mitosis.
B) The membrane is rigid and inflexible, preventing the movement of substances across the cell membrane.
C) The outer layer of the membrane is hydrophilic, which allows water to flow in and out of the cell easily to eliminate waste.
D) The proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell
I believe the answer is D because the proteins act as carriers,or channels. Carbohydrates act as marker distinguisher,and cholesterol affects the movement of molecules.
D) The proteins that are embedded in the cell membrane act as channels to transport substances in and out of the cell
A neuron will not respond to a second stimulus of equal strength to the first stimulus to which it has already responded because ___
A neuron will not respond to a second stimulus of equal strength to the first during its absolute refractory period because the voltage-gated sodium channels are inactivated. During the relative refractory period, a stronger than normal stimulus can trigger an action potential because the membrane is hyperpolarized.
A neuron will not respond to a second stimulus of equal strength to the first stimulus during the absolute refractory period, even if the stimulus strength increases. During this period, the voltage-gated sodium channels are inactivated and cannot reopen in response to a stimulus. However, during the relative refractory period, a neuron can fire a second action potential if the stimulus strength is stronger than usual because the neuron's membrane is hyperpolarized. Only when the neuron's membrane potential is restored to its resting state can it fire at its normal stimulus threshold again.
Stimulus strength is normally coded by the frequency of action potential firing, but during the absolute refractory period, the neuron cannot increase its firing rate regardless of stimulus strength. After this period, the cell requires additional time and stronger stimuli during the relative refractory period to reach the threshold for firing another action potential.
How do oil spills affect marine ecosystems?
A) Oil has nutrients that are useful for marine plants.
B) This has no lasting effect, as the oil evaporates in a few days.
C) Marine animals absorb the oil through their skins and store it as fat.
D) Marine organisms die because oil stops oxygen from entering the water.
hint : oil floats on water.
Answer:
The answer is D) Marine organisms die because oil stops oxygen from entering the water.
Explanation:
The oil spill results in the death of many marine beings, due to the contaminants of the oil compounds that are tremendously toxic. Due to the oil film, the oxygen content in the water is reduced, which causes the asphyxiation of the fish, since they need oxygen to live, which comes from the water, that by the gills, retains the present oxygen and distributes it through the circulatory system through the body.