Answer: C
Explanation: I just did it on usa test perp
The transmission electron microscope requires that specimens be put inside a vacuum chamber so the microscope cannot be used to observe living specimens. The correct option is C.
What is electron microscope?The technique of electron microscopy (EM) is used to obtain high-resolution images of biological and non-biological specimens.
In biomedical research, it is used to investigate the detailed structure of tissues, cells, organelles, and macromolecular complexes.
An electron microscope can only be used in a high vacuum. This makes using a microscope to study living organisms impossible because they would evaporate and disintegrate under such conditions.
Transmission electron microscopy is a microscopy technique in which an image is formed by passing an electron beam through a specimen. The specimen is usually an ultrathin section less than 100 nm thick or a grid suspension.
Because the transmission electron microscope requires specimens to be placed inside a vacuum chamber, it cannot be used to observe living specimens.
Thus, the correct option is C.
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Please answer the questions
Scientists observed that the populations of top-level consumers in a particular ecosystem were rapidly decreasing. Further studies revealed that there was also a decline in producer productivity. Which other changes did the scientists most likely observe in the ecosystem?
increased producer diversity
decreased population size at all levels
decreased primary consumer populations only
increased primary and secondary consumer diversity
Answer:
The correct answer is - decreased population size at all levels.
Explanation:
A decrease in the productivity of producers of an ecosystem will lead to a decrease in all other organisms of the ecosystem including top-level consumers to the bottom-level producers due to the fact that producers provide energy and food to primary consumers.
It is because they are the only organisms that convert the sunlight to usable energy and food that transfer from one trophic level to other, so if the population of producers or their productivity will decrease then there will be decreased population size at all levels.
If the amount of food or resources available increases, the carrying capacity of the animal would ?
Answer: Increase
Explanation:
True or False; Carbohydrates and Lipids are organic, contain CHO and are both forms of energy.
Certain species of blind fish living in perpetual darkness in the ocean depths have evolved from ancestors that could see. Research indicates that the brain centers for vision in these fish is degenerating, whereas the brain centers controlling other senses are enlarging. What might be the MOST probable reason for the loss of vision in these fish
Answer:
Explanation:
Evolution for lack of light. If there is no reason for it you lose the ability but it strengthens other senses. It's compensation. The need to tell if the temperature has increased because of something nearby or ability to feel miniscule movement will increase to compensate for that lack of sense.
What are two things we need to consider to make living off Earth possible?
Rheumatoid arthritis is commonly associated with the presence of rheumatoid factor autoantibodies in the bloodstream. This indicates that rheumatoid arthritis is likely to be a. an infective process. b. caused by bacterial infection. c. an autoimmune process. d. because of an enzymatic defect.
Answer:
The correct answer is - c. an autoimmune process
Explanation:
Rheumatoid arthritis is a disease or condition that affects the joints mainly by swollen, and painful joints. It is an autoimmune disease as the person's own immune system attacks the body.
The presence of rheumatoid factor autoantibodies states that it is an autoimmune process. There are other autoantibodies also associated with this type of arthritis that are rheumatoid factors (RF), anti‐keratin antibodies (AKA), anti‐filaggrin antibodies (AFA), and anti‐perinuclear factor (APF).
the soil will move farther when you pour water_________
gradually or rapidly
Answer:
The soil will move farther when you pour water gradually.
What is the answer to number 1
Answer:
TTT GGC AGT
Explanation:
Why does climate change occur?
Explain your answer.''
Answer:
Human activity is the main cause of climate change. People burn fossil fuels and convert land from forests to agriculture. Since the beginning of the Industrial Revolution, people have burned more and more fossil fuels and changed vast areas of land from forests to farmland.
Explanation:
What is the kinetic theory of matter? How does it relate to the motion of molecules?
Explanation:
kinetic energy is energy that object has because of its motion .The kinetic molecules theory explain the forces between molecules and the energy that they possess. matter is composed of small particle's(atom,molecules,and icon)
this is due in 50 minutes
Answer:
It should have taken over 2500 million years. This is owing to many natural disasters as well as the rotation of the planet, which resulted in the separation of landscapes.
Explanation:
please I really need a help here ASAP. It's a physics question.
A space ship travels 3.00 ~ 10 km vertically to transport scientists from one particular station to
another. After the transportation, the captain decides to go hizontally 2.00 * 10km to visit an Orie
Calculate its:
a. Distance
b. Displacement
Answer:
a).Don't know if you meant to write 3x10^10km and 2x10^10km
I'll solve with this... If they aren't the values... You can then input the real values.
Distance = Total length traveled.
D= 3x10^10 + 2x10^10
D= 5x10^10Km
b) Displacement:
Since it went vertically... Then went horizontally in the second phase... It is forming a right angled Triangle and the Displacement would be the Hypotenuse of this triangle.
Disp.= √ (3x10^10)²+(2x10^10)²
Disp.=3.61x10^10km.
PLEASE ANSWER ASAP I AM BEING TIMED!!!
ONLY ANSWER IF UR 100%
EXPLAIN THIS IS A WRITTEN ANSWER
Briefly explain why fossil fuels are good sources of fuel. In other words, where does the energy come from?
WILL MARK BRAINLIEST!!!
Which of these is a benefit for a parent who sees a genetic counselor?
A. Deciding whether or not to take medications before pregnancy.
B. Being able to plan in advance for a genetic disorder in a child.
C. Knowing that society must make decisions about genetic disorders.
D. Having a source of long-term psychological help to live with a genetic disorder.
Answer:
B. Being able to plan in advance for a genetic disorder in a child.
Being able to plan in advance for a genetic disorder in a child is an advantage for a parent who sees a genetic counselor. So, the correct option is (B).
What is Genetic Disorder?A genetic disorder is a type of disease caused in whole or in part by a change in a DNA sequence away from the normal sequence.
It can be caused by several reasons like
1. Monogenic Disorder
It is caused by a mutation in one gene
2. Multifactorial Inheritance Disorder
It is caused by mutations in multiple genes
3. Combination of gene mutations and environmental factors.
4. Damage to chromosomes by the changes in the number or structure of entire chromosomes, the structures that carry genes.
Genetic counseling helps parents for better understand test results and treatment options, helps deal with emotional concerns, and provides referrals to other healthcare providers and advocacy and support groups.
Thus, being able to plan in advance for a genetic disorder in a child is an advantage for a parent who sees a genetic counselor. So, the correct option is (B).
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What are the answers for both of the questions
BRAINLIEST
CAN SOMEONE PLZ HELP ME!!
Explanation:
I’m pretty sure it’s phenotypes
What is microbiology about?
Answer:
Microbiology is the study of all living organisms that are too small to be visible with the naked eye. This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'.
Explanation:
it right here -w-
I need help, please help me
Answer:
False for both
Explanation:
In the first one you can see the red line has a greater slope. In the second you can see the yellow line acts as an outlier
Hope this helps
Scientists have determined that Earth's interior has layers with different properties. One property is that the inner core is solid. Which of the following statements can be used as evidence to support this property?
A.
During an earthquake, both P waves and S waves travel away from the focus through the interior of Earth.
B.
After an earthquake, P waves are detected on the opposite side of Earth but S waves are not.
C.
P waves do not refract based on the density of the medium it is traveling in, but S waves do.
D.
Seismographs that are far from the epicenter of an earthquake detect P waves much sooner than S waves.
Explanation:
During
an earth quake both p waves and s waves travel away from the focus
Answer:
B
Explanation:
B
The diagram shows three steps in the carbon cycle.
The Carbon Cycle
Which two phrases best summarize the events taking place in Step 2?
A. Cellular respiration
B. Storing carbon dioxide in living organisms
C. Photosynthesis
D. Releasing carbon dioxide into the atmosphere
Answer:
A. Cellular respiration
C. Photosynthesis
Explanation:
There are two main processes occurs in the carbon cycle i.e. cellular respiration and photosynthesis. Plants absorb carbondioxide gas from the atmosphere through small openings called stomata. The carbondioxide enters the leaves and combine with water produces glucose and oxygen. Glucose is stored in different parts of plant whereas some oxygen is used by the plant and the remaining oxygen is releases in the atmosphere while on the other hand, in cellular respiration, glucose is broken down to produce energy in the form of ATP, carbondioxide gas and water.
Answer:
The real answer is A and D.
What is the major source of energy for the Earth?
here's your answer.. Option (C): the sun
female male or other
Artificial wetlands ________. are the major program for replacing lost natural wetlands purify water for use as bottled drinking water are a source of arsenic contamination in Bangladesh are created using xeriscaping methods can help purify water and also provide wildlife habitat
A fruit fly of genotype B R/b r is testcrossed with b r/b r. In 84 percent of the meioses, there are no chiasmata between the linked genes; in 16 percent of the meioses, there is one chiasma between the genes. What proportion of the progeny will be B r/b r
Answer:
4 percent (4%)
Explanation:
A single crossover occurs between two (non-sister) chromatids belonging to homologous chromosomes. In this case, 16 percent of the meioses have a single crossover, thereby it will produce 8 percent of the chromosomes with the original (parental) combination in the progeny and the remaining 8 percent should be recombinants. From this result, it is reasonable to conclude that half of these recombinants should be 'Br' (and the other remaining 4 percent should be recombinants 'bR'), and therefore the answer is 4 percent (4%).
Advantages and disadvantages of physical barriers in the immune system
Explanation:
advantages:Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
What is immune system?Immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.
Disadvantages of physical barriers in the immune system is causing immuno deficiency disease.
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In screenshot! answer quickly please
Answer:
umm i would answer but i cant see the photo whats the question?
Explanation:
Please do not answer if you don't know this is a final I really need to pass 
ells go through periods of growth and division. Cell division occurs during
Which of the following would not produce more electricity when a magnet is moved
back and forth through a coil of wire?
1 moving the magnet faster
2 adding more coils
3 using a stronger magnet
4 using longer wire
Answer:
moving the magnet faster thats the answer i can give not sure bit by incerasing coils electrycity is more produced
Moving the magnet faster would not produce more electricity when a magnet is moved.
What is magnet?A substance or thing that creates a magnetic field is called a magnet. The most noteworthy characteristic of a magnet—a force that pulls on other ferromagnetic elements, such as iron, steel, nickel, cobalt, etc.—as well as the ability to attract or repel other magnets—is caused by this invisible magnetic field.
An object made of a substance that has been magnetized and produces its own persistent magnetic field is referred to as a permanent magnet. A common example is a refrigerator magnet used to keep notes on the door of the refrigerator.
Ferromagnetic materials are those that can be magnetized and are also those that are powerfully drawn to a magnet (or ferrimagnetic). These comprise some naturally occurring materials as well as the metals iron, nickel, and cobalt as well as their alloys.
Therefore, Moving the magnet faster would not produce more electricity when a magnet is moved.
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