In order to observe a specimen under 4X objective lens, the following procedures must be observed:
Set up the microscope ensuring that the lens have been adequately cleaned and the light source is workingMount the object on a slide and place the slide on the stage of a clean microscope.Switch the revolving nose piece to ensure that the 4X objective is in positionSwitch on the light sourceBring the object into focus by using coarse and fine adjustment knobs.Ensure that the image of the object is centered on the stage.In order to observe the same specimen under the 100X objective:
Switch the revolving nose piece to fix the 100x objective in place.Only use the fine adjustment knob to bring the image into focusIf the image will not resolve properly, a few drops of immersion oil may be applied to the slide to improve resolution.More on microscopy can be found here: https://brainly.com/question/13137774
Atoms with full valence electron shells are chemically stable. Most noble gases have eight valence electrons. So, one model for chemical bonding is the octet rule. This states that atoms will _________ or __________ electrons in order to reach the more stable arrangement of eight electrons in their valence shells. A) lose, gain B) conduct, share C) transfer, share D) conduct, transfer
Answer:
A - Gain or Lose
Explanation:
Atoms with full valency electron shell are usually very stable. Most noble gases with full valency shell are usually very stable . The valency electron are fully occupied(8) for all noble gases this is what makes them hard to react with other element.
During chemical bonding elements strife to attain the octet rule. The octet rule is to have a full valency electron through bonding . When this atom bond they either transfer electron or share electrons.
The case of transferring electrons forms an ionic bonding. One atom gain electrons while the other lose electrons during ionic bonding. One atom form cation while the other forms anions.
For covalent bonding atoms are shared to attain the octet rule. This kind of bonding exist between a non metal and another non metals
Answer:
Explanation:A: gain or lose
Which of the following principles best correlates to the philosophy behind IPM planning?
o choose the most effective method to eliminate pests
O use natural rather than synthetic methods to control pests
choose the safest approach with the least human risk
o do the least possible harm while controlling pests
this is for my plant systems class
Answer:
Use natural rather than synthetic methods to control pests.
Explanation:
Integrated Pest Management (IPM) encompasses a variety of techniques used to maintain an acceptable level of pests in a given environment. that limits use of pesticides and maintains soil nutrients for future crops. Its four components are prevention, avoidance, monitoring, and suppression.These practices rely on natural efforts first
1) why should we always breathe through the nose and not through the mouth ?
Answer:
Below
Explanation:
The nose is lined with hairs which act as a filter for particles like dust, pollen and other allergens so they don't enter your lungs.
Your nose also preheats the air you breath in.
How can antibiotic resistance be minimized?
Explanation:
There are many ways that drug-resistant infections can be prevented: immunization, safe food preparation, handwashing, and using antibiotics as directed and only when necessary. In addition, preventing infections also prevents the spread of resistant bacteria.
bees feed on nectar from flowering plants in return the flowers are __________ by the bees
Answer:
pollentate
Explanation:
correct me if im wrong pls give brainliest
Which might be aAfter reading the passage about acupuncture, identify which statement supports the
claim that acupuncture relieves pain.
Answer:
The National Institutes of Health found it effective in reducing pain and other symptoms, but it is not clear how it works.Explanation:
While distinctly Anthropoids, some Platyrrhines maintain a few of traits that are typically represented only in Prosimians. For this question, identify the seemingly primitive traits and discuss how their presence in both Platyrrhines and Prosimians may reflect an example of convergent (parallel) evolution. (150-250 wds)
Convergent evolution is the concept of two or more species evolving similar traits despite being completely unrelated to one another, including the absence of a common ancestor.
The Platyrrhines, more commonly known as "New World Monkeys", share many characteristics with the Prosimians. Some of these include:
Teeth layoutDietEyesight Sleeping habitsand more.
The Platyrrhines and the Prosimians are both nocturnal animals. Despite all other members of their family being active during the day, the Playrrhines have evolved nocturnal habits similar to that of the Prosimians. Aside from that, they feed on insects more so than fruit, which is reflected by the layout of their teeth, and have eyesight well adapted to dark conditions. All of these are traits they share with the Prosimians.
Despite being in different ecosystems and regions, and sharing no recent common ancestors, both of these species have evolved strikingly similar traits. This can be used to corroborate the theory of convergent evolution, which explains how two species can evolve very similar traits despite being unrelated.
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Which type of data is non-numerical?
A. statistical data
B. quantitative data
C. qualitative data
Answer:
qualitative data. ....
It’s sad when you realize you aren’t as important to someone as you thought you were.
Provide a potential hypothesis for the research topic and
explain whether the data support it. Also, explain the
reasons for the observed data trends.
Answer:
i think that the higher the body temperature the higher the cellular respiration
Explanation:
The graph indicates the relationship between body temperature and cellular respiration. As the body temperature increases, more ATP is produced, but after a certain temperature, there is no cellular respiration.
What is cellular respiration?In cellular respiration, the cell breaks down glucose and forms ATP. Glucose is broken down by glycolysis, the Krebs cycle, the electron transport chain, and finally ATP is formed.
In the graph, it is shown that an increase in body temperature is related to an increase in ATP molecule production. ATP molecule production is nearly zero at 80 degrees body temperature. As the temperature increases to 100 degrees, ATP production increases to nearly 50.
After 100 degrees, the body temperature rises, but there is a decrease in ATP production. After 100 degrees, the enzymes required for cellular respiration don't work. Hence, a decline in ATP is seen.
Hence, after a certain temperature, the enzymes involved in cellular respiration don't function as their structure changes.
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please help just one question.
Answer: I think the answer is True
hich elements are most like to form a binary ionic compound?
Select one:
a.
sodium and aluminum
b.
calcium and potassium
c.
phosphorus and oxygen
d.
lithium and nitrogen
e.
hydrosulfuric acid
A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions.
Iwo atoms that are isotopes of one another must have the same number of what! protons O neutrons electrons all particles
Answer:
neutrons
Explanation:
Neutrons have no charge so it doesn't change the overall charge of the atom. Having a different number of protons or electrons would change the overall charge.
Hope this helps!
The tagging and labeling of evidence is an example of _____.
a protocol
a control
an evidence collector
a first responder
Answer:
a protocol
Explanation:
got it right on edge :)
Glucose molecules bond together in a process known as dehydration synthesis. What happens in this process?
Group of answer choices
The reaction uses water molecules to break the bonds in each glucose.
4 Water molecules are used for every
1 water molecule is lost (OH + H) for every bond formed
4 water molecules are lost from each bond broken
Answer:
In the dehydration synthesis reaction above, two molecules of the sugar glucose (monomers) combine to form a single molecule of the sugar maltose. One of the glucose molecules loses an H, the other loses an OH group, and a water molecule is released as a new covalent bond forms between the two glucose molecules.
Explanation:
i hope this helps anyway
Glucose molecules bond together in a process known as dehydration synthesis. The process includes 1 water molecule is lost (OH + H) for every bond formed. The correct option is C.
What is dehydration?Dehydration is a process of chemical reaction in which water is lost. A water molecule is released during the process of making larger molecules out of smaller monomers, which is known as dehydration synthesis.
In the synthesis process, the glucose monomers are bonded together and with each bond, the water molecule is lost in the process. From monomers of glucose, polymers are formed, like starch, and cellulose.
Polymers are formed through the process of dehydration synthesis. These polymers are DNA, proteins, and carbohydrate.
Thus, the correct option is C. 1 water molecule is lost (OH + H) for every bond formed.
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what is this pointing too
c- coarse adjustment knob
d- stage clip
Is the velocity constant threwout the trip
Answer:
Velocity vs Time: The object's velocity increases as it accelerates at the beginning of the journey. It remains the same in the middle of the journey (where there is no acceleration). It decreases as the object decelerates at the end of the journey.
Explanation:
Hope it helps
Angular Momentum can be expressed
as which of the following
a. L = MPR
b. L = VRM
c. L = VPM
4. Who discovered the first known case of a typhoid carrier?
Answer:
Mary Mallon (September 23, 1869 – November 11, 1938), also known as Typhoid Mary, was an Irish-born cook believed to have infected 53 people with typhoid fever, three of whom died, and the first person in the United States identified as an asymptomatic carrier of the disease pathogen, Salmonella typhi.
Answer:
mary mallon
Explanation:
Mary Mallon, the first known case of a healthy carrier in the United States, was proven responsible for the contamination of at least one hundred and twenty two people, including five dead
What are viruses referred to since they don’t easily fit into the category of living things?
bacteria
organism
cell
agent
Viruses are referred to Agents since they don’t easily fit into categories of living things.
Viruses are composed of DNA and RNA and they can be referred to as
agents as they cause different diseases which is usually very difficult to
manage and treat.
Viruses don't perform the characteristics of living organisms, they lack cells
and isn't under Bacteria as they replicate only when in the body while
bacteria replicates anywhere.
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Answer:
The answer is agent
Explanation:
PLEASE HELP WITH THIS ONE QUESTION
Answer:
perfect cube shape
Explanation:
the shape of a cell is perfectly cube- shape then its volume must be calculated with an equation:
Height×Width×number of sides and number of boxes
Surface= area of volume ratio is calculated with an equation
Area /volume
if a cell has large surface area to volume into ratio means it has greater exposure to the environment.It means that flow of nutrients and gases move freely in the small cell compared to large cell.
what are three abiotic and biotic factors that can kill mosquitoes
Please help! will mark brainlist!!!
Which object is hotter in terms of its kinetic energy: the cup of coffee or the iceberg? Explain the reason for your answer in terms of your understanding of the kinetic molecular theory of matter.
Answer:
red-hot iron bar
Explanation:
An iceberg could even contain more heat energy than a cup of coffee or a red-hot iron bar. That's because its bigger and contains so many more molecules, each of which has some heat energy. The coffee and the iron bar are hotter (have a higher temperature), but the iceberg holds more heat because it's bigger.
Which statement describes an effect of economic dominance on society?
A.
Economic dominance encourages education systems to impart moral values to people.
B.
Economic dominance allows people to spend more time with their families.
C.
Economic dominance causes education systems to channel their efforts into imparting skills for the job market.
D.
Economic dominance has led the government to mold its working methods to increase costs.
Two of the four main classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids?
Answer:
Proteins are important structural and functional biomolecules that are a major part of every cell in your body. There are 2 nucleic acids -- DNA and RNA. Your cells make proteins by following the instructions encoded in your DNA, which is genetic material and a type of nucleic acid.
yw
A 100-pound bag of fertilizer is marked 0-15-15. How many pounds of nitrogen,
available phosphate, and potassium are there in the bag?
Fertilizers are the chemical element for improvement of productivity of plants. Here, 0-15-15 shows nitrogen 70 pounds, phosphorous 15 pounds and potassium 15 pounds.
Why to label fertilizer?Labeling of fertilizer is to show the content of major nutrients. They are usually labeled with three numbers i.e., N-P-K label, i.e., Nitrogen-Phosphorous-potassium label , such as, 0-15-15. the first number is the percentage of nitrogen, second is for phosphorus and third is for potassium.
Thus, here as per the marking, the quantity of the nutrients are: nitrogen 70 pounds, phosphorous 15 pounds and potassium 15 pounds.
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10. Since I contain many enzymes,
I can digest an injured cell;
And can break down a large molecule
Into a smaller one as well.
What am I
Answer:
Lysosomes
Your Welcome!
Of these things is an environment which one is a living thing?
Air (wind)
Soil (clay)
Fungus (mushroom)
Water (river)
Answer:
What is Fungus (mushroom)
Explanation:
The living body of the fungus is a mycelium made out of a web of tiny filaments called hyphae. The mycelium is usually hidden in the soil, in wood, or another food source. A mycelium may fill a single ant, or cover many acres.
Air,water and soil may well be a place living things exist in, ecosystem, but they are in no way living.
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Fungus (mushroom) is the living thing in environment. Thus option C is correct.
What are the types of environment ?The surrounding of living organism including both the biotic and abiotic factors called as environment. It may be natural, social, or built environment.
Majority of the environment is composed up atmosphere, hydrosphere, lithosphere, and biosphere.
It can be up microenvironments which is the immediate local surroundings of an organism and secondly macro environments refers to biotic and abiotic factors.
Two common types of environment such as natural or geographical environment, and man-made environment.
Geographical environment include terrestrial environment independent of humankind. For example rivers, deserts, water, oceans.
Man-made environment refers to a social environment. It is completely dependent on human social influence.
For example, city infrastructures, houses, transport and communication etc.
Thus option C is correct.
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Use the periodic table from the lesson to answer the following question.
The atomic mass of F is.
9
10
19
55
Answer:
19
Explanation:
Fluorine's atomic mass is 18.99 which rounds up to 19 which is on your selection of choices.
. What could explain how these rocks got so far apart?
Answer:
What could explain how these rocks got so far apart? The United States and Portugal are parts of different plates. ... The United States and Portugal are parts of different plates. The plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates over millions of years.
Explanation: