6. Which of the following does not allow observation of living organisms?
a) Bright field microscopy
b. Phase contrast microscopy
c) Fluorescent microscopy
d. Dark Field microscopy ...​

Answers

Answer 1
Dark field microscopy because it’s dark and you can only observe things in light

Related Questions

Viral or bacterial germs that invade body cells are called _____.


phagocytes


pathogens


white blood cells


lymphocytes

Answers

White blood cells is the answer

Explain the role of cellular respiration in a cell.

Answers

Answer:

Every cell performs a type of cellular respiration as it is required to produce energy. The point of cellular respiration is to turn high-energy molecules, know as glucose, into ATP, a form of usable energy. There are two types of respiration, aerobic and anaerobic. Aerobic goes through 3 stages and produces the most ATP by using oxygen and releasing carbon dioxide. Anaerobic does the same job but only uses one stage and produces much less ATP. This process gives the cell energy and continues the carbon cycle.

Suppose beak size currently ranges from 6-10mm. If directional selection favors larger beaks (up to a max of 15mm), which statement is true?

Answers

source of variation needs to create that size

the phenomenon is called a revision why did it happen

Answers

Answer:

help  in studying

Explanation:

which photo synthetic process can occur at night?
A.the reaction at photosystem 1
B.the formation of NADH
C.the calvin cycle
D.the reaction at photosystem 2

Answers

Its most likely D because it’s more reasonable

The most direct method by which an ion or molecule can move across a cell membrane is by ____________.A. using an integral protein.B. a sodium-potassium pump.C. simple diffusion. D. active transport.E. osmosis.

Answers

Answer:

C. Simple diffusion

Explanation:

Simple diffusion from a high to low concentration is the most direct method that ions or molecules can move across a cell membrane.

Through this method, no proteins are required for transport, and no energy is used.

The ion or molecule being transported directly moves across the cell membrane, without any other factors involved.

So, the correct answer is C. Simple diffusion

are amino acids associated with proteins

Answers

Answer:

Yes

Explanation:

Amino acids create proteins

yes they are building blocks of proteins

What is limiting factor

Answers

Answer:

limiting factors are often referred as a lack of a particular resource .

In which of the scientific classifications are all the
animals grouped

Answers

The lion belongs to the following groups: Kingdom Animalia (includes all animals) Phylum Chordata (includes all vertebrate animals, as well as some other more primitive ones) Class Mammalia (includes all mammals)

In general, men show _____ than women do. a. less facial expression b. more facial expression c. less envy or anger d. more envy or anger

Answers

Answer:

more envy and anger

Explanation: they cant control themselves lol.

Our eyes are always the same size from birth​

Answers

Answer:

It's FALSE. Baby eyes are propotionallity larger than adult eyes.

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examples of c3 and c4 plants​

Answers

C3 vs C4 Plants
C3 Plants C4 Plants
Examples include rice, wheat, oats, barley, cotton, peanuts, tobacco, sugar beets, soybeans and spinach Examples include Maize, Sugarcane, pearl millet, sorghum.
Leaves of these plants DO NOT show Kranz anatomy. Leaves of these plants show Kranz anatomy.

Which of these organelles prepares proteins to be fully functional?

A. Rough endoplasmic reticulum

B. Large vacuoles

C. Smooth endoplasmic reticulum

D. Chloroplasts

Answers

Rough endoplasmic reticulum

Answer:

Rough endoplasmic reticulum is among the organelles that are found in eukaryotic cells. The reason as to why it is called rough is because it has ribosomes attached to its surface. Its main function is to produce proteins.

Explanation:

List three potential effects of errors occurring during meiosis.

Answers

Errors can occur during meiosis producing gametes with an extra or missing chromosome. The consequences of this following fertilisation depend on which chromosomes are affected. Often the embryo is not viable, but some of these errors can lead to trisomy conditions or sex chromosome disorders.

Explanation:

:)

Errors during meiosis can lead to mutations in gametes. Defective gametes that undergo fertilization may result in miscarriages or ultimately lead to genetic disorders.

Table sugar is an example of which molecule

Answers

Answer:

Disaccharide

Explanation:

It is a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined. It has the molecular formula C12H22011.

Answer:

table sugar is example of glucose. It has the molecular formula C12H22O11.

PNS axons are vulnerable to cuts, crushing injuries, and other types of trauma. However, a damaged ____________ can regenerate if the ____________ remains intact and a critical amount of ____________ remains. The success of peripheral nervous system axon regeneration depends upon two primary factors: (1) the amount of ____________ and (2) the ____________ between the site of the damaged axon and the ____________ . The possibility of repair is ____________ with an increase in either of these two factors. Neurolemmocytes play an active role in regeneration

Answers

Answer:

The correct answer is - damaged, effector organ, neurilemma, damage, distance, cell body, decreased.

Explanation:

PNS axons are prone to cuts, and other types of injuries. A damaged axon can regenerate if the effector organ remains intact and a critical amount of neurilemma is found.

The degree of success of these axons regeneration depends upon factors that are (1) the amount of damage, and (2) the distance between the site of the damaged axon and the cell body it innervates The possibility of repair is reduced with an increase in either of these two factors. Neurolemmocytes play an active role in regeneration

What is the probability that a hybrid individual with the genotype AabbCcddEeFf will produce a gamete that has the genotype abCdeF

Answers

Answer:

6.25%

Explanation:

Find the number of different gametes that can be produced

number of gametes produced = 2^n

n is the number of allele pairs that are heterozygous

there are 4 heterozygous allele pairs, these are: Aa, Cc, Ee and Ff

2^4 = 16

abCdeF is one of the 16 genotypes that could be produced

to find the percentage, divide 1 and 16 and multiply by 100

1 ÷ 16 = 0.0625

0.0625 × 100 = 6.25

a) explain covalent bond and hydrogen bond with an example of each (4marks)
b)state three(s) importance of surface tension and example( 6marks)​

Answers

Answer:

Covalent bond is a primary chemical bond formed by the sharing of electron pairs. Covalent bonds are strong bonds with greater bond energy. Hydrogen bond is a weak electrostatic attraction between the hydrogen and an electronegative atom

Why do you think type 2 diabetes occurs so much more often than other inheritable diseases? Propose a hypothesis for why this allele has not been eliminated by natural selection.
Which type of species best describes a mouse: opportunistic or equilibrium? Explain why a mouse or rat population would continuously grow while other mammals (cheetahs) are nearly extinct.

Answers

Answer:

This allele has not been eliminated by natural selection because it may confer an adaptive advantage for particular environmental conditions  

Mice and rats are opportunistic species. These species can rapidly adapt to different environmental conditions, while cheetahs are unable to adapt to changing environments.  

Explanation:

An allele is a gene variant that may be beneficial, neutral, or deleterious for a particular environment. Different alleles are not eliminated by natural selection against other alleles (even when a priori seem to be deleterious) because they confer a selective advantage in a given environment. For example, the allele for sickle cell anemia is caused by a point mutation which is lethal in homo-zygous individuals, but heterozygous individuals are less likely to die of malaria, thereby this allele has been positively selected in geographic areas where malaria is an endemic disease. Moreover, mice and rats are opportunistic species, i.e., they are species that rapidly adapt to varied living conditions. These species are characterized to have high growth rates and produce many offspring. On the other hand, the cheetah is a highly specialized species that is unable to adapt to changing environments. In consequence, cheetah populations are more prone to become extinct than rat and mice populations.

When you pushed the diaphragm up what change occurred in chest cavity pressure? Explain how this change in chest cavity pressure affected the lungs.

Answers

Answer:

positive pressure

Explanation:

Exhalation is a passive process during which the intercostal muscles and the diaphragm relax. The ribs move downward and inward, while the diaphragm rises. This movement causes the chest to decrease in size and positive pressure to build inside the chest cavity. The positive pressure pushes air out of the lungs.

Which critter trait is affected by an environmental factor, such as light, temperature, or
diet? Explain.

Answers

Answer:

Tallness.

Explanation:

Tallness is the critter trait that is affected by an environmental factor, such as light, temperature, or  diet because the organism remains short if they are not getting food properly as well as temperature. Food provides essential nutrients that contribute in the growth of organism. Suitable temperature of the body allows the different functions in the body to be done which directly affects the growth of the body and the organism becomes taller.

Every day we make choices that can potentially affect our environment. For example, we may toss a plastic drink bottle into the nearby trash because it’s more convenient than walking all the way to the recycling bin. Think about three choices you made this week that could have affected the environment. Did your choices have a positive or a negative effect on the environment? Explain your reasoning.

Answers

First, I chose to put a Chipotle container into the trash, instead of the recycling. This wasn’t the best decision, because it could have gone to the recycling and helped others.

Secondly, my family owns a compost bin and compost machine that helps compost vegetable waste, fruit scraps, coffee grounds, and other compostable items. Choosing to do this helps the environment in many ways.

Thirdly, I picked up many aluminum cans on the side of the road to crush and collect. After several months of collecting them in a container, my family and I bring them to a place that recycles and reuses metals and aluminum.

The three choices that could have affected the environment are as follows:

Utilization of plastic to make it easy for carrying objects.Plants trees in order to build a green environment. Overdependency on vehicles rather bicycles and pedestrians.

What is Environment?

The environment may be defined as anything which is present in the surroundings of living organisms. This environment basically has two types of factors biotic and abiotic factors.

In the above three choices, building a green environment has a positive effect on the environment. It may also affect living organisms positively. While the rest of the two may stimulate a negative impact on the environment by increasing the levels of carbon dioxide by liberating emission and non-biodegradable plastics.

Therefore, the three choices that could have affected the environment are well mentioned above.

To learn more about Environment, refer to the link:

https://brainly.com/question/24182291

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What is immigration?
A. When animals leave an ecosystem
B. When animals are born in an ecosystem
Ο Ο Ο O
C. When animals move into an ecosystem
D. When animals die in an ecosystem

Answers

Answer:

C. When animals move into an ecosystem

Explanation:

Mode of action of aldehydes and Quaternary ammonium compounds is

Answers

Answer:

Aldehydes have antibacterial, antifungal, antiviral and sporicidal activity. These are helpful to destroy the spores of Bacillus subtilis and Clostridium sporogenes. Glutaraldehyde and formaldehyde are commonly used aldehydes in disinfectants.

Quaternary ammonium compounds work by denaturing the proteins of the bacterial or fungal cell, affecting the metabolic reactions of the cell and causing vital substances to leak out of the cell, causing death.

Identify the molecule that is not a compound

Answers

Answer:

dear, your question seems to be incomplete.......plz ask it again

This could be Hydrogen gas as it is a molecule but is not a compound as it is only made up of one element!

It was found that the C4 protein promotes synaptic pruning during brain development in the teenage years. This is a normal process in brain development that is important for removing unnecessary connections between neurons and establishing a mature brain structure. However, high expression levels of a certain allele of C4 can lead to too much pruning, which may promote the onset of schizophrenia. The variation observed at the C4 gene which leads to the greatest increase in risk was found to cause a 25% increase in the risk of developing schizophrenia. The baseline risk in the population is 1%. What is the risk of an individual with this variant developing the condition?a. 0.25%.
b. 1.25%.
c. 25%.
d. 26%.

Answers

Answer:

b. 1.25%

Explanation:

Variations observed in C gene has increase in risk of 25% to develop schizophrenia. It is a kind of an abnormality in which a person interprets reality unrepresentative. The baseline risk in population is 1% then there is 1.25% risk associated with an individual to develop this condition.

Describes vitamin D levels and problems

Answers

Answer:

Vitamin D is essential for strong bones,because it helps the body use calcium from the diet.

It’s important for normal growth and development of teeth and bones. It can help resist against certain diseases. Some problems if you take to much vitamin D is that you will get weakness, fatigue, sleepiness, headache, loss of appetite, dry mouth, metallic taste, nausea, vomiting, and others.

heavenly bodies that travel around a planet are called satellites or moon which planet has no satellite or moon
A. mars and venus
B. jupiter and venus
C. jupiter and mars
D. mercury and venus​

Answers

Answer:

i think its A. i dunno if it is btw have a nice day

Answer:

D. Mercury and Venus

Which of these statements are true about diffusion

A. It is how gas exchange occurs in the blood cells in the circulatory system

B. It is when particles move from an area of low concentration to high concentration

C. It is how white blood cells travel around in the body to find viruses and bacteria

D. It is how sunlight gets absorbed into chloroplast in plants for photosynthesis

Answers

Answer:  c

Explanation:

What is the answer with explaining

Answers

Answer:

EeWw

Explanation:

The allele for the earlobe is depicted as e while that of the hairline is w.

A parent that is homzygous recessive for earlobes (ee) and homzygous dominant for hairline (WW) would have the genotype eeWW.

The other parent that is homzygous dominant for unattached earlobes and homzygous recessive for hairline would have the genotype EEww

eeWW    x    EEww

During meiosis, each genotype will form gametes.

eeWW: eW, eW, eW, eW

EEww: Ew, Ew, Ew, Ew

These gametes will randomly unite during fertilization to produce offspring. Since the same gametes are formed by each parent:

   eW   x   Ew

offspring

100% EeWw (see the attached image for the Punnet's square)

The genotype of all the children would be EeWw and would phenotypically be with unattached earlobes and dominant hairline.

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Express as index formlog 2 64 = 6 14. Is Puerto Rico is closer to South America or Florida? The clerical and editorial employees in a publishing house need to be at their desks by 8:00 AM and follow a set of precise procedures dictated by management. The jobs of these clerical and editorial employees ________. Angelina has added page numbers to her report, but all of the pages are labeled "Page 1 at the bottom. What caused this issue?She typed Page 1 in the footer.She added a header instead of a footer.She did not create a numbered list in her footer.She forgot to click the Continue Numbering option. ANSWER AND ILL GIVE BRAINLIEST Which of the following statements can you infer would happen If one organ system stopped working?a. The other organ systems would have to work harder to make up for the broken system b. The other organ systems would stop working too.c. The other organ systems would still work on their own but might have to work harder to complete their function correctly. In the small country of Economerica, there are 6 thousand people employed, 1 thousand people unemployed, and 3 thousand people of working age not included in the labor force. One thousand students graduate from the university and seek jobs in the country, but not one graduate is able to find one. Half of the new graduates believe there is no chance of finding a job and return home to live with their parents. Ceteris Paribus, what would the new unemployment rate be in Economerica?A. 14.29%B. 20.00%C. 25.00%D. 45.45% Moly completes 3/10 of her science project in 4/5 hour What is the slope of a roof on a house that has a vertical height of 2.4 feet from the ceiling of the top floor to the top of the pitch and a length of 8.2 feet from the center of the edge of the house? Need help with correcting:I needed to answer this sentence into spanish. My teacher has returned the assignment about 10 times and I give up :)6. Clean the house: my answer: Limpiar la casa. teachers message: Limpiar is the infinitive. What is the command form of this verb? Which of these is an example of hanging out?A. Surfing the Internet for information about game websitesB. Making and sending out your own original music videoC. Sending your friend an email with a link to a new music clipD. Playing an adventure game with people all over the globe 5. Describe three ways that music can be used in television. (6 points) The area of a square of side X is 8. What's the area of a square of side 3x ASAP HELP PLS NO WRONG ANSWERS------------ Explain why each is an example of personificationSoft silence of the summer night! Alive with wistful murmurings, Enfold me in thy quiet might: The peace of heaven is stealing now Functions of save our soul (sos) ? place to sit in a staduim called What is the solution of ? why is cursing someone in authority bad? Toby has been working on collecting tidbits over the past year from a financial firm's trash in an effort to eventually break into their system. Even though the financial firm has strict restrictions on access to their trash, Toby has been able to bypass these restrictions. How has Toby most likely done this please help me please