1. John observed bacteria at 100X under the oil immersion and then decided to go back to 40X

objective by raising the oil objective a little to avoid the damage to objective lens. Critique his

technique. (1 pt.)

Answers

Answer 1

Answer:

See the answer below

Explanation:

In the first instance, the 100X objective does not have any business touching the slide on the stage so that there would not be any reason to raise it a little in order to go back to a lower objective. At higher objectives, only the fine adjustment should be used to bring the object into focus so as to avoid the objective lens from touching the slide which can damage the objective and or break the slide on the stage.

For the X100 objective to be raised in order to avoid a damage to it, it means John allowed the objective to come too close to the slide in the first place. This should not have been so.


Related Questions

Since the 1950s, most mental health hospitals have emptied as a result of the introduction of effective

drug therapies and community-based treatment programs.
drug therapies.
psychotherapy.
community-based treatment programs.

Answers

Answer:

Drug therapies and community-based treatment programs

Explanation:

Before the 1950s there was more of an institutionalization approach and they didn't have an alternative for many patients. They had some success with psychotherapy but not nearly as much as we have today. But when they introduced new drug therapies and added community-based treatment programs many mental health hospitals were not filled with patients anymore. Many serious problems were now kept under control with simple pills and a good treatment program.

In the 1950s the mental health hospitals were closed and the patients with mental illness were sent back home to receive the treatments in their communities.

The correct answer is:

Option A. Drug therapies and community-based treatment programs.

The asylums were closed in 1950s as:

Psychotherapy and some institutionalized approaches were present to treat the patients. There were no other alternatives.

The incorporation of drug therapies and community-based treatments led to the emptiness of the asylums and therefore, they were closed.

The treatments were under control and community-based therapies helped in the treatment of mental patients.

Thus, the asylums were closed in the 1950s due to the introduction of drugs and community-based therapies.

Therefore, option A is correct.

To know more about mental asylum, refer to the following link:

https://brainly.com/question/3277759


An RNA sequence includes 15 codong, How many amino acids does this sequence encode

Answers

15 hope that’s helps

How can scientists investigate the impact of limiting factors on a population?

Answers

Answer:

A simulator, a test on animals, or perhaps a study group

Explanation:

what is the white of the eye that is protective

Answers

Answer:

The sclera,  besides admitted as the whitten of your eye, in older writing, as the adventitia albuginea oculi, is the unintelligible hempen defensive outer layer of the human eyeball containing primarily collagen and any flexible fibre. Here's a visual reference:

When two species interact in a way that is beneficial to both species this is what kind of relationship?
A. Parasitic
B. Mutualistic
C. Commensal
D. Symbolic

Answers

Answer:

B

Explanation:

Mutualism is a relationship between two species in which both species benefit. Certain species of bacteria in your intestines form a mutualistic relationship with you.

Answer:

D. Symbolic

Explanation:

hope that helps you out love!! <3

What occurs during interphase of the cell cycle?

Answers

Answer:

A. The chromosomes are split

Explanation:

That’s just what happens bud.

A is the correct answer for this questions

A researcher is setting up a randomized clinical trial to evaluate the effect of acetaminophen on liver

function, and designates a control group of subjects and an experimental group of subjects. What could

interfere with the results or completion of this study?

Answers

Answer:

Explanation:

Ordinarily, the control group will be the group that has reduced liver function but are provided with placebo while the experimental group will be the group that has reduced liver function and are treated with acetaminophen.

Some factors that could interfere with the results of this trial are

1) Some of the volunteers could have been on some medications before the trial started, that could affect the result of the study because the medications could hamper or improve the liver function or even the performance of the drug (if it is still present in the body system).

2) Some symptomatic volunteers could be using some medications (without the researcher's knowledge) to help alleviate the pain of the reduced liver function. These medications could also affect the result as discussed in the (1) above.

3) Some volunteers could have pre-existing health conditions (that may be known or unknown to them). This could also affect the result of the research as this pre-existing health condition could render the dosage of the drug "ineffective" or even contribute to the deterioration of the liver.

One major factor that could interfere with completion of the study is the availability of patients that will consent to be used as volunteers for clinical trial. Since there are other known/effective drugs for improving liver function, it might be difficult to convince people to consent to this trial thus elongating the completion time of this study

Which of the following substances would be transported by exocytosis?



water


hormones


oxygen


sodium ions

Answers

Answer:

oxygen

Explanation:

bc is a gas so it's lights enough to be transported

3. Analyze: From the observations you made above, can you state exactly why the aliens

changed their shape? Why or why not?

Answers

Answer:

They changed their shape.

Explanation:

The aliens  changed their shape because their shapes makes the people frightened. Their shape structure is different from the humans so they change their shape in order to walk among people easily and interact with people which they can't do with their real body structure. So that's why they changed their shape when they interact with people or to walk among people.

Pls can I get the answer please !

Answers

Answer:

Proteins made by free-floating ribosome's remain in that cell: whereas, proteins that travel through the endomembrane system leave by secretory vesicles.

Explanation:

A free-floating ribosome creates proteins within cells, but unlike normal ribosomes, this protein is left to float freely in the cell’s cytosol.

Furthermore, proteins that are synthesized in the rough endoplasmic reticulum will most likely be secreted into the extracellular environment.

I would like to apologize in advance if my answer was incorrect.

It is the 3rd one.. I hope it helps!

What are two gases that are constantly diffusing across the membranes of our cells

Answers

Answer:

I believe that will be oxygen (O2) and carbon dioxide (CO2).

Explanation:

Hope this helps, if wrong correct me.

Referring to the image above, what are the abiotic factors in this image?
A
Water, Plants, and Birds
B
Birds and Plants
С
Soil, Plants, and Birds
D
Water, Sunlight, Soil, and Air

Answers

Answer:

Water, Sunlight, Soil, and Air

Explanation:

Abiotic factors are the non-living components of an ecosystem. These are physical factors, such as water, sunlight, soil, and air.

In contrast, biotic factors are the living components and include birds and plants.

The way the biotic and abiotic factors interact with one another forms the ecosystem. The biotic factors rely on the abiotic factors to sustain their life.

which of the following is an example of a producer

Answers

Answer: What are the choices? Producers are plants that take energy from the sun :)

what are the example of science and technology ​

Answers

Answer:

an example is that they both help us advance and scientific knowledge is used to create technologies :)

Explanation:

Q: Predict and describe some possible effects to your entire food web if the following happened:
A mysterious virus has sickened the secondary consumer fish. There
are few survivors. Fortunately, this virus is not affecting organisms on any other trophic levels. However, the loss of these organisms is
affecting the rest of the food web. Please describe the possible effects:

Answers

Answer:

Less fish will disrupt the predators in the ocean. Sharks, and other predators in these oceans need a food source such as fish if this Virus does indeed kill these many fish. Meaning the virus is in this fish, It might spred to predators that eat these fish. Still if the predators of the food chain dont find these food sources for them i am sure they will die of starvation.

Explanation:

If a food source for animals is obsulete i am sure the predators of the animals will have starved to death like how, the Hot blob is affecting the Cassins auklet due to the Less amount of phytoplankton in the oceans.

State two adaptations of the cell membrane​

Answers

Answer:

Explanation: The ability of some organisms to regulate the fluidity of their cell membranes by altering lipid composition is called homeoviscous adaptation. ... It means the lipid molecules are free to diffuse and exhibit rapid lateral diffusion along the layer in which they are present.

what type of government did egypt and the indian valley civilization have? How was power passed through generations?
Simple pls

Answers

Answer: Mesopotamia, china, indus River Valley, the mesoamerican empires..... in this case, the two rivers are the tigris and Euphrates. Mesopotamia. The name Mesopotamia was given to the middle eastern civilizations that existed between the Euphrates and Tigris Rivers.   :)

A scientist has 400 grams of a radioactive substance with a half-life of one year. The amount of the substance that the scientist has after t years is represented by the expression 400(0.5)t.

Which kind of expression is 400(0.5)t?

linear
quadratic
exponential growth
exponential decay

Answers

Answer:

D. exponential decay

Explanation:

Got it right on edge :P

In cats, the allele that causes curled ears is dominant to the allele that causes normally shaped ears. If two hybrid curled-ear cats are mated, what percentage of the kittens is predicted to have curled ears?

Answers

Answer:

75% (3:4)

Explanation:

A hybrid organism is one that is heterozygous - it carries one curled allele and one normal allele.

Let's use the letter C. The curled allele is C, the normal allele is c.

The heterozygotes are therefore Cc.

The cross between the two cats is Cc x Cc.

                   C             c

C                CC          Cc

c                Cc           cc

Organisms with the genotype CC and Cc are curled ears, since the C allele is dominant to the c allele.

1:4 of the genotypes are CC, and 1:2 are Cc, so 3:4 (75%) have the curled ear phenotype.

The function of oxygen in aerobic respiration is to:
a) carry hydrogen ions from the Krebs cycle to the electron transport chain
b) bind electrons and hydrogen ions at the end of the electron transport chain
c) attach a high energy phosphate group to ADP
d) form carbon dioxide in the Krebs cycle
e) donate electrons to NADH to make it release a hydrogen ion

Answers

Answer:

Aerobic respiration uses oxygen to break down glucose, amino acids, and fatty acids and is the main way the body generates adenosine triphosphate (ATP), which supplies energy to the muscles.

Explanation:

hope this helps

13. Which statement best describes the evidence discovered from studying sedimentary rocks?

Answers

Answer:

A

Explanation:

why are data tables useful in an experiment?

Answers

Answer: By organizing data, a scientist can more easily interpret what has been observed. ... Since most of the data scientist collect is quantitative, data tables and charts are usually used to organize the information. Graphs are created from data tables.

Explanation: Have a blessed day!

describe the formation of tissues fluid and lymph​

Answers

As fluid enters the tissue space from the blood stream pressure builds up in this space and as this hydrostatic pressure increases it causes the interstitial fluid to diffuse into the lymphatic capillaries once the interstitial fluid has entered the lymphatic capillaries it is called lymph

Answer:

Tissue fluid is formed because of the high hydrostatic pressure of the blood at the arteriole end of the capillary that pushes fluid out of the blood.These valves are large enough to allow proteins, which are too big to get into the capillaries, into the lymph vessels.

or

Tissue fluids is formed because of the high Hydrostatic pressure of the capillary that pushes fluids out of the blood. These valves are large enough to allow protiens, which are too big to get into the capillaries, into the lymph vessel.

Explanation:

what are 5 physical traits of a turkey

Answers

Answer:

feathers, eyes, gobbler, beak, head

Explanation:

PLEASE HELP ASAP!!! :) | its only 3 questions ill give brainliest if your right
1.Which type of rock may result when sedimentary rock is exposed to extreme heat and pressure?


a. clastic

b. extrusive

c. igneous

d. metamorphic


2. In the rock cycle, how does rock become sediment?

a. Through weathering and erosion

b. through crystallization and solidification

c. through heat and pressure

d. through compaction and cementation


3. A Sedimentary rock containing a fern fossil was found. what does this tell about the area at the time the rock was formed?

a. The area was hot

b. The area was covered by and ocean

c. The area was cold

d. The area was on a land

Answers

Answer:

d. Metamorphic

a. Through weathering and erosion

d. The area was on land

Explanation:

Hope I helped!

Explain what is meant by cotransport

Answers

Explanation:

Cotransporters are a subcategory of membrane transport proteins that couple the favorable movement of one molecule with its concentration gradient and unfavorable movement of another molecule against its concentration gradient

Disregard question number 5! But pleaseeee help me with 1-4

Answers

Answer:

1. The process in which organisms find and colonize a near lifeless area.

2. They are different from each other because secondary supports life, as primary does not.

3. Pioneer species is a hardly classified species which establish themselves in  a disrupted ecosystem and trigger the process of ecological succession.

4. Biotic factors support life and the aspects. Abiotic factors involve external life. They interact with each other when the abiotic provide for the biotic.

Hope this helped! Please mark brainliest!





What conclusion can be reached about this data

Answers

Answer:

Explanation:

What data?

If u know the water cycle please answer this question

Answers

Answer:

Gravity

Explanation:

Percolation is the process of a liquid slowly passing through a filter. It's how coffee is usually made. Percolation comes from the Latin word percolare, which means "to strain through." Percolation happens when liquid is strained through a filter, like when someone makes coffee.

Evaporation-the process of turning from liquid into vapor.

Condensation-water which collects as droplets on a cold surface when humid air is in contact with it.

and gravity- Gravity is the force of attraction between two objects, and Earth's gravity pulls matter downward, toward its center. It pulls precipitation down from clouds and pulls water downhill. The warm water near the surface of the ocean heats up with sunlight and evaporates, keeping the water cycle in motion.

In your Punnett Square activity, you chose beads which represented
genes and used Punnett Squares to determine possible offspring.
your first parent genotype was yellow bead and blue bead and the
second parent genotype was blue bead and blue bead, how many
offspring our of 4 have the genotype yy?
please please

Answers

Answer:

Two out of the four offspring will have the genotype yy.

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