Answer:
the answer is B.
Explanation:
The biggest advantage is that they have a higher resolution and are therefore also able of a higher magnification
Answer:
C - Allow you to view living cells, while electron microscopes do not
Explanation:
The method used to prepare the specimen for viewing with an electron microscope kills the specimen. Electrons have short wavelengths that move best in a vacuum, so living cells cannot be viewed with an electron microscope.
You want to know if music increases productivity in the workplace. One group of employees listens to music while they work. Another group does not listen to music. Productivity is measured at the end of each month. What is the independent variable?
Answer:
The independent variable is one that is controlled to corroborate its effects or the relationship causes consequence with a phenomenon in relation to the dependent variable.
Explanation:
In an epidemiological study, or a research based on a hypothesis, there are different variables.
Variables are those phenomena that vary over time and can be quantifiable over time.
The quantification of the variables must be through indexes or analysis, and these in turn must confer data reliability.
On the other hand, there are two types of variables, dependent and independent, homogeneous or non-homogeneous (that is, they occur in one individual or in many at the same time) and if they are reasonable or not in the face of a given investigation.
If the variable that is chosen in an investigation is not reasonable or homogeneous, it will never become independent or dependent since it will not be good to take it into account or count it during the investigation.
In this case, the possible variables could be: the type of music, different levels of hearing by the workers, the type of work they do when listening to music, the volume of the music in which it is heard.
Is a vesicle found in an animal or plant cell. or both?
Answer:
Both, although they're less common in plant cells.
Both plant and animal cell have vesicle.
what are the difference between animal cell and plant cell?Plant cell have cell wall and other cell organelles while animal cell do not have cell wall but other organelles are present, has fixed-size and shape due to presence of rigid cell wall while animal cell have irregular size and shape.
Plant cell has rigid cell wall and plasma membrane while animal cell has flexible and thin plasma membrane for this reason animal cell can change their shape.
In plant cell Plastids like chloroplast, chromoplast, leucoplast and nucleus is present on one side where as plastid are absent in animal cell and nucleus is present in the central region in case of animal cell.
Plant cell can do photosynthesis and make their own food, so they are phototrophic where as animal cell do not have cell wall.
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When scientists carefully measure the lichens and agree on their average thickness and how often they appear, which parts of the scientific cycle are the scientists using
Answer:
Answer: process and facts, because they are using a systematic method to measure and then record data
Explanation:
During a study of lichens and air quality in part of China, scientists measure the thickness of lichens and estimate how many rocks and trees are covered with lichens in one town. The scientists are following the scientific cycle of observing while using a systematic process, establishing facts, explaining facts, and then returning to the systematic process to collect more facts.
When scientists carefully measure the lichens and agree on their average thickness and how often they appear, which parts of the scientific cycle are the scientists using?
Answer: process and facts, because they are using a systematic method to measure and then record data
The parts of the scientific cycle are the scientists using process and facts, because they are using a systematic method to measure and then record data. The correct option is A.
What is scientific cycle?Simply put, when scientists discuss periods, they are referring to sequences of events that recur themselves. Some cycles are extremely simple.
Scientific theories are generally born and die as a result of what is known as the scientific process.
This is a general cycle in which a pattern in some phenomena is identified, a general hypothesis is formed, new phenomena are predicted based on this supposition, and the predictions are tested by experiment.
The research and development cycle is made up of five iterative activities: problem analysis, underpinning, design, integration, and evaluation.
Scientists use procedure and facts as part of the scientific cycle even though they use a systematic method to gather and then record data.
Thus, the correct option is A.
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Your question seems incomplete, the complete question is:
During a study of lichens and air quality in part of China, scientists measure the thickness of lichens and estimate how many rocks and trees are covered with lichens in one town. The scientists are following the scientific cycle of observing while using a systematic process, establishing facts, explaining facts, and then returning to the systematic process to collect more facts.
When scientists carefully measure the lichens and agree on their average thickness and how often they appear, which parts of the scientific cycle are the scientists using?
A- process and facts, because they are using a systematic method to measure and then record data
B- process and facts, because they are observing lichens and air quality and describing why they are related
C- explanation and process, because they are using a systematic method to measure and then record data
D- explanation and process, because they are observing lichens and air quality and describing why they are related
Check all of the photos that show potential hazards or unsafe situations in the lab
Answer:
So for edge it is the 1,3,4
Explanation:
Photo courtesy of the school of natural resources
Photo courtesy of San Jose library
Photo by Chris rice
Answer: 1,3,4
Explanation:
I took the test
Why do you think Dr. Margulis met so much resistance with her introduction of endosymbiosis?
Answer:
Because there is scientific evidence that evolution occurs gradually and endocimbiosis is a type of evolution that occurs suddenly.
Explanation:
Although Dr. Margulis was very thorough in her defense of endosymbiosis, she had to face great resistance from the scientific community around this theory. This was because as we know, and as it is scientifically proven, evolution is something that happens gradually and slowly and that is exactly what scientists believed and defended. However, endosymbiosis presented a kind of evolution that happened abruptly and suddenly, which provoked resistance to the theory.
what is the mass of compound to the nearest gram
Answer:
Explanation:
mass of Na = 23 u
mass of S = 32 u
mass of oxygen = 16 u
Thus, Na2S2O3
= 23(2) + 32(2) + 16(3)
= 46 + 64 + 48
= 110 + 48
= 158 u.
A solution that is hypotonic to a cell has A. fewer solutes than the cell. B. the same concentration of solutes as the cell. C. more solutes than the cell. D.too many solutes
Answer: C. more solutes than the cell
Nuclei within the gray matter of the spinal cord that receive information from sensory receptors such as pain or pressure receptors in the skin are _____ nuclei.
Answer: somatic sensory
Explanation: the somatic sensory nuclei are those within the gray matter of the spinal cord that receive information from sensory receptors in the skin. Some of these information can be pain or pressure. They are also responsible for detecting touch, the position of the body in space, and temperature. Somatic senses are sometimes referred to as somesthetic senses.
Name and define the two basic kinds of reproduction
Answer:
asexual and sexual
Explanation:
Sexual: two parents are required, exchange of gametes (sex cells), and the offspring are genetically different.
Asexual: requires only one parent and the offspring are genetically identical to the parent (ex-sea star)
How can a female inherit red-green color blindness?(1 point) Her mother is a carrier, and her father has the condition. Her mother is not a carrier, and her father has the condition. Females cannot inherit red-green color blindness. Her mother is a carrier, and her father does not have the condition.
Answer:
The correct answer is - Her mother is a carrier, and her father has the condition.
Explanation:
Colorblindness is a sex linked recessive disease that is passed from the parent to the offspring through X chromosome that have recessive gene of the disease. It is rare in the females as the very low chances of the females to inherit two copies of disease gene allele. But as only one allele is present in males of X chromosome and if there is disease copy he will be color blind.
To get a colorblind female the girl child must get two copies of these allele that has recessive X chromosome one from her carrier mother and other from her conditioned father. Check image for punnet.
Thus, the correct answer is - Her mother is a carrier, and her father has the condition.
Why do astronomers depend on technology?
Answer:
The definition including its given subject is provided in the subsection below on clarification.
Explanation:
Slightly earlier astronomers didn't rely on technology-they only stayed up throughout the night in something like a profession and glanced up to take a track of what they would have seen. They require innovation if they wish to do it more than anything. Today scientists really would like to grasp extraordinarily distant or very small objects so they need many more technologies, such as analyzing frequencies that only the human eye couldn’t detect.What is osmoregulation
Answer:
Explanation:
Osmoregulation is the process of maintaining salt and water balance across membranes within the body.
Hope it helps
Answer:
Explanation:
the maintenance of constant osmotic pressure in the fluids of an organism by the control of water and salt concentrations.
11. Look at the figure above. Which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (Hint: It's where the clouds seen on Earth
are formed.)
--
O A. Stratosphere
OB. Exosphere
C. Troposphere
D. Thermosphere
Answer:c)
troposphere
Explanation:
Bz it is closest to plant
Answer:
troposphere
Explanation:
you are measuring length with a meter stick. however you do not realize that the first 4.0 centimeters of the meter stick are missing because a hungry beaver made a snack of it earlier that day. the measurements you take but the meter stick will be.
A. accurate but imprecise
B. precise but inaccurate
C. imprecise and inaccurate
D. accurate and precise
Answer: Option B.
Precise but inaccurate.
Explanation:
It is precise because the measurement taken with well incremated tool reflect how close it is to the actual value i.e it has the quality of been exact but diet to the missing of 4.0 centimeter because a hungry beaver made a snack of it earlier that day the measurements will be INACCURATE because it does not conform with the result of the standard or correct value to be gotten.
30 points to who ever answer .
Does a mushroom grow and develop ?
Answer:
Research has proven that :
Plants and animals grow through cell division
It means they have to produce more cells to get bigger
Cell division is relatively slow and requires a lot of energy.
The mushroom body also grows by cell division.
Fact : However, the mushroom fruit does not grow by cell division.
Explanation:
Sally has collected a sample of dirt from a riverbank and wants to analyze it. First she decides to find the mass of the sample. What tool should she use?
Answer:
By using s measuring cylinder
Answer:
A ,pretty sure
Explanation:
what are the advantages and disadvantages of using models to understand human impacts on earth's systems and the carbon cycle?
Answer:
Models are used for understanding a process or phenomenon.
Explanation:
Advantages of using models:
1) It gives some information about the human impacts on earth's systems and carbon cycle.
2) It also helps in discovering the defects and errors.
Disadvantages of using models:
1) It did not fully explain the human impact on both earth and carbon cycle.
2) It is the simplified version not an actual version of the real situation of carbon cycle.
The advantages and disadvantages for using the models should be explained below.
Advantages & disadvantage for models that effect the earth system and the carbon cycle:Advantages of using models:
1) It provides some kind of information related to the human impacts on the earth's systems and the carbon cycle.
2) It helps in finding out the defects and errors.
Disadvantages of using models:
1) It did not describe fully related to the human impact on both earth and carbon cycle.
2) It should be the simplified version but not an actual version of the real situation of the carbon cycle.
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How many energy transfers can a food chain sustain?
Answer:
Trophic level transfer efficiency (TLTE) measures the amount of energy that is transferred between trophic levels. A food chain can usually sustain no more than six energy transfers before all the energy is used up.
Explanation:
The final football game of the season is here and Tobias is ready for the game. He's energized and can barely sit still. He's excited and his heart is racing a million miles a minute. What part of the brain is responsible for Tobias's increased heart rate?
Answer:
Medulla
Explanation:
The medulla is responsible for our involuntary actions, one of which is our heart rate.
Involuntary action means we do not intentionally do it ourselves; it is one of our unconscious processes, such as breathing.
PLEASE HELP, 50 points!!!! what elements on the periodic table are helpful in some ways but still toxic?
Answer:
1. Polonium
2. Mercury
3. Arsenic
4. Francium
5. Lead
these 5 elements are very very dangerous...
hope it helps u plz mark as brainlist
The most toxic elements on the Periodic Table are :
Polonium (radioactive metalloid)Mercury (toxic metal)Arsenic (classic poison)Francium (extremely reactive)Lead Plutonium (radioactive heavy metal)The atmosphere is made up from 77 percent nitrogen (N2), 22 percent oxygen (02) and all other gases are less than one percent of the atmosphere. The crust, part of the Geosphere is made up for almost 47 percent of Oxygen. Why can’t we breathe the crust?
Answer:
Well, we can not breathe in solids. But I'm guessing that this question is more based on the type of oxygen that's in the crust.
There are oxygen ions in m=almost everything in the earths crust, yes, but we do not breathe in the same type of oxygen that is bound to their crystal structures.
There are plenty of oxygen atoms in the earth's crust, but there are very few oxygen molecules. The crust is primarily made up of silicate minerals…feldspars, pyroxenes, amphiboles, quartz, etc. There are also lots of oxide, carbonate, phosphate, and sulfate minerals. These all have large amounts of oxygen atoms tightly bound in their crystal structures. But this is not the free molecular oxygen that we breathe.
Because free oxygen molecules (O2) are very reactive, vanishingly little of it is found in the crust below the depths of shallow cool groundwater. Air, including its 20% oxygen, dissolves in rain as it falls from the sky. Some of this air-saturated water soaks into the earth and recharges the groundwater system, carrying the air with it. Nitrogen, argon, and other unreactive trace gases can be circulated quite deeply with this downflowing water…to 10km or more. However oxygen is very reactive, and so it reacts with the minerals in the rocks (or forms new minerals) before it gets transported very deep. You have probably seen evidence of this reaction in red or brown stained rocks exposed at the earth's surface that have been oxidized by downflowing surface waters.
In the geothermal industry, where wells produce deep, magmatically heated waters for power generation, we routinely see atmospheric nitrogen and argon in the produced fluids. This, along with the isotopic composition of the water, gives a clear indicator atmospheric origin of the water (most of it, at least). However there is absolutely no dissolved oxygen in those waters. It all reacted with the rock long ago.
The condition of the Rh factor is called (positive/negative?) when present and (positive/negative?) when absent.
Answer:when present - positive
When absent - negative
what are hormones explain??
Answer:
Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes.
Answer: a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
Explanation: a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action. Hormones are chemical substances that affect the activity of another part of the body (target site). In essence, hormones serve as messengers, controlling and coordinating activities throughout the body.
Hope this helps^^
38) Within a double-stranded DNA molecule, adenine forms hydrogen bonds with thymine, and cytosine forms hydrogen bonds with guanine. What is the significance of the structural arrangement
Answer:
They are significant in ensuring the structure of the DNA molecule is preserved as well as the proper interpretation of the genetic code of the DNA molecule used to direct the production of proteins needed by the cell. In addition, nucleotides are responsible for the 2 long strands that create the double helix structure of the DNA molecule.
Explanation:
They are significant in ensuring the structure of the DNA molecule is preserved as well as the proper interpretation of the genetic code of the DNA molecule used to direct the production of proteins needed by the cell. In addition, nucleotides are responsible for the 2 long strands that create the double helix structure of the DNA molecule.
example of
For a plant, sunlight is an
a. internal stimulus
b. external stimulus
C.
homeostasis
d. reproduction
Answer:
Explanation:
homeostasis
For a plant sunlight is an example of ; ( C ) homeostasis
Plants require the light to carryout photosynthesis for proper growth and production of its food therefore insufficient sunlight will affect the growth and development of a plant. also some plants grow towards a light source ( phototropism ). to maintain its internal system.
Since the sunlight is not found within the plant but it has a direct effect on the growth and development of the plant, it is an example of a homeostasis while reproduction takes place within the plants
Hence we can conclude that for a plant sunlight is an example of ; ( C ) homeostasis
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Primary sensory areas of the brain have connections to association areas. What are the names, locations, and functions of the association areas for sight, hearing, and touch
Answer:
There is no short answer.
Explanation:
Association areas are mostly located in the cerebral cortex and they process the information coming from the sensory areas such as hearing, vision etc.
The association area for sight is located in the occipital lobe and it's name is striate cortex. It's main function is to process the signals coming from the eye.
The association area for hearing is located in the temporal lobe and it's main function is to process the information coming from the ears.
The association area for touch or the sensory association area is located in the cerebral cortex and it's main function is to process the signals coming from the sensory stimuli outside the body.
I hope this answer helps.
At the coordinates 45 degrees W & 72 degrees N it is 9:32 AM. What time is it at the coordinates 75 degrees W & 45 degrees S? 8:32 AM, 10:32 AM, 11:32 AM, 7:32 AM
Answer:
The correct option is;
7:32 AM
Explanation:
The information given are;
The time at 45 degrees W and 72 degrees N = 9:32 AM
The variation of time with lines of longitude is given as 15 degrees for each 1 hour variation, therefore, where we have the other location at 75 degrees W and 45 degrees S, the difference in the longitude = 75 - 45 = 30 degrees west of the initial location
Moving west is in the opposite direction of the Earths rotation, therefore, we subtract 1 hour for every 15 degrees giving 30/15 = 2 hours subtracted
The time at 75 degrees W and 45 degrees S is therefore, 9:32 AM - 2 hour = 7.32 AM
The latitude of a place left out in the calculation of the relative time of a place.
Transmission speeds are expressed in _______, whereas storage space is expressed in _______.
Answer:
bits and bytes
Explanation:
How do DNA, chromosomes, and genes work as the instructions for heredity?
Answer: Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
Explanation:
Some fungal species can kill herbivores while feeding off of sugars from its plant host. What type of relationship does this fungus have with its host?
Answer:
parasitism
Explanation:
In evolutionary ecology, parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
The type of relationship this fungus have with its host should be parasitism and the same should be considered for the given situation.
What is parasitism?Parasitism refer to the close relationship that lies between the species in which the one organism should be live or inside the other organism as per the life, the host should lead some kind of harm and adopted the structure.
Therefore, we can conclude that The type of relationship where fungus involve with its host likely be parasitism.
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