Brightfield microscopes and light microscopes are the two common types of microscopes. Brightfield microscopes produce a dark image on a bright background and are commonly used in laboratories. Light microscopes encompass various types and use light to visualize images in diagnostics and research.
Explanation:The two common types of microscopes are brightfield microscopes and light microscopes.
Brightfield microscopes are compound microscopes that produce a dark image on a bright background. They are commonly used in laboratories and can have either a single eyepiece (monocular) or two eyepieces (binocular).
Light microscopes encompass various types such as brightfield microscopes, darkfield microscopes, phase-contrast microscopes, differential interference contrast microscopes, fluorescence microscopes, confocal scanning laser microscopes, and two-photon microscopes. These microscopes use light to visualize images and are used in diagnostics and research.
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(85 POINTS!) A nerve signal is like a wave. How does this work?
A: An electrical wave moves down the axon by electrons moving from the place the signal started to the place it ends up.
B: A wave of reversal of the negative electrical potential inside the cell passes along the axon with ions moving in and out of the axon.
C: A wave of movement passes down the axon, in which the whole axon moves sideways in one place and then the next.
D: The density of the cytoplasm inside the axon changes from one place to the next as the signal moves along the axon.
Answer:
d
Explanation:
Fog is a _____ composed of water droplets in air.
solution
colloid
suspension
solvent
solute
Answer;
Colloid
Fog is a colloid composed of water droplets in air.
Explanation;
-Fog is made up of condensed water droplets which are the result of the air being cooled to the point where it can no longer hold all of the water vapor it contains.
-A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. A fog is an example of a colloid as a beam of light can be easily seen passing through it.
!!!!98POINTSPLEASEHELP!!!! A slug is an example of which animal group. A. arthropods. B. amphibians. C. echinoderms. D. mollusks.
Answer:
It is mollusks
Explanation:
I just did the quiz and it was 100%
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An object is seen to either speed up, slow down, or change direction. These behaviors are caused by Blank Space __________.
Question 4 options:
a balanced set of forces
stable factors
unbalanced forces
frictional force
The answer is unbalanced forces!
What determines the chemical properties and physical properties of a mineral?
A the arrangement of the mineral's atoms
B the specific gravity of the mineral
C the conditions under which the mineral formed
D the location where it was found
The chemical property as well as physical one is determined by the arrangement of the mineral's atoms. The correct option is A.
What are chemical properties?A chemical property is any property of a material that emerges during or after a chemical reaction.
That is, any quality that can only be established by changing a substance's chemical identity.
A physical property is a property of a substance that can be observed or measured without changing the substance's identity.
Color, density, hardness, and melting and boiling points are examples of physical properties.
The atomic structure and crystal chemistry of minerals determine their physical properties.
Crystal form, color, hardness, cleavage, and specific gravity are the most common physical properties.
Examining a mineral's crystal form is one of the best ways to identify it.
Thus, the correct option is A.
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what molecules combine to form polysaccharides?
in an open system, such as a campfire, matter can_______
help plzz :))
In an open system like a campfire, matter can exchange with its surroundings, transforming into different substances while conserving mass.
In an open system, such as a campfire, matter can exchange both matter and energy with its surroundings. During this process, matter such as wood combines with oxygen and transforms into ashes, carbon dioxide, and water vapor. The heat energy released can be used for cooking food or providing warmth. The total mass of matter remains constant as it changes forms, adhering to the law of conservation of mass.
As you sit on the beach, you notice that the breeze, which had been blowing toward the water from the land, shifts so that it is blowing off the water toward land. What event has just occurred?
Clouds have begun to form over the water.
The temperature over the land has reached its highest point for that day.
The temperature over the land has become higher than the temperature over the water.
The temperature over the water has become higher than the temperature over the land.
When the air temperature over land is higher than the air temperature over water, the air over land rises due to the lower pressure, hence c is the correct option.
What is the temperature between land and water?Because when the air temperature over land is higher than the air temperature over water, the air over land rises due to the lower pressure, and air over the ocean in to replace it.
The land surface warms up more quickly than the sea surface during the day, just to refresh your memory, warmer air is lighter than colder air.
Throughout the day, there can be large variations in the air temperature over the land.
Therefore, always higher than air over the ocean are air temperatures over land, hence c is the correct option.
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Please Help?!?!?!
A cool fluid is more dense than a warm fluid.
True or False???
What is the difference between an invertebrate chordate and a vertebrate chordate
Answer: Invertebrate chordates don’t possess a backbone nor a thyroid
Explanation:
Which system is responsible for the transportation of oxygen throughout the system?
A) Digestive System
B) Circulatory System
C) Endocrine System
D) Respiratory System
The correct answer is (b) Circulatory system
The circulatory system transports the oxygen throughout the system. The deoxygenated blood is carried from other parts of the body to the lungs and the exchange of gases takes place. The oxygenated blood from the lungs is carried to other parts of the body. Only 1.5% of oxygen is transported through this system other 96% of the oxygen is transported by combing with pigment called hemoglobin. This hemoglobin also an important of circulatory system that helps in purifying the blood.
Answer:
B) Circulatory System
Explanation:
The blood, blood vessels, and the heart are the main components that comprise the body system known as the circulatory system. The circulatory system is essential to supply the various tissues and organs with oxygen and nutrients, to remove the wastes generated and for the transport of hormones.The transportation of oxygen takes place by the red blood cells present in the blood. the hemoglobin is the molecule that binds the oxygen molecules and transports it.In flies, long wings are a dominant trait, and short wings are a recessive trait. If a heterozygous long-winged fly is crossed with a short-winged fly, what is the LIKELIHOOD that the offspring will contain the recessive allele?
Which process requires the sperm and egg cells?
Asexual reproduction
Sexual reproduction
Mitosis
Cell division
In rain forests the trees high in the canopy receive a large amount of direct sunlight. Plants that grow under the canopy receive less light. Why do plants that grow on the ground in rain forests have broad leaves?
A) The broad leaves store food.
B) The broad leaves help them survive the cold.
C) The broad leaves provide shelter for insects.
D) The broad leaves provide surface area to catch light.
Answer:
the answer is D
Explanation:
D) The broad leaves provide surface area to catch light.
What are rainforests?Rainforests are tropical forests that receive a high amount of rainfall, typically more than 200 cm per year. They are found in regions near the equator, where the climate is warm and humid. Rainforests are characterized by their dense canopy of tall trees, which can reach up to 60 meters in height. The high rainfall and warm temperatures create a rich and diverse ecosystem, with numerous plant and animal species living in the forest.
Rainforests are also known for their lush undergrowth, including shrubs, ferns, and vines. They play a critical role in the global climate, as they absorb and store large amounts of carbon dioxide, and are also important sources of oxygen. However, rainforests are facing severe threats from human activities such as deforestation and conversion of land for agriculture, which can lead to loss of biodiversity and other negative impacts on the environment.
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UMMM who's good at science?!?!?!
What causes the convection cell to turn up at point A?
which part of the iceberg displaces water equal in weight to the buoyant force?explain.
Answer:
The bottom half
Explanation:
The lower half part of the iceberg displaces water equal in weight to the buoyant force.
What is Buoyant force?When an object is placed in a fluid, the fluid exerts an upward force we call the buoyant force. The buoyant force comes from the pressure exerted on the object by the fluid.
Because the pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top - hence the net upward force.
The buoyant force is present whether the object floats or sinks. The object experiences forces on each of its six sides. On each side, the force is the pressure multiplied by the area of the side, and is directed perpendicular to the side and toward the inside of the object.
Therefore, The lower half part of the iceberg displaces water equal in weight to the buoyant force.
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At what temperature on Celsius scale does pure water freeze?
Does NaCI have carbon
What is the difference between a pure tall plant and a hybrid tall plant?
Answer:
The pure tall plant has equal alleles (AA or aa) while the hybrid tall plant has one dominant and recessive allele (Aa).
Explanation:
When we say that an organism is pure, we mean that it is homozygous. In this case we are saying that, for a given trait, its alleles are equal. This means that the allele is occurring in double dose in that organism and, consequently, the gametes generated by it will be equal. A pure tall plant has alleles equal to "AA" or "aa".
When we refer to hybrid organisms, we are referring to heterozygous organisms. In this case we are saying that, for a certain characteristic, the alleles are different. For this reason, in gametogenesis, it is possible to observe the presence of two distinct gametes. A hybrid tall plant has different "Aa" alleles.
1. What is a temperature inversion in the atmosphere?
2. Where do the temperature inversions occur in the atmosphere?
3. What causes the major temperature inversions in the atmosphere?
Answer:
(1) Inversion of temperature in the atmosphere refers to the changing of the temperature with respect to the elevation. The atmosphere of the earth is divided into-
(a) Troposphere- It covers a distance from the ground surface to a height of about 10-15 km. Here, the temperature decreases with altitude.
(b) Stratosphere- It extends from the height of about 15 km to 50 km and here the temperature increases with the increasing altitude. The ozone is layer is present here.
(c) Mesosphere- It covers a vertical height from about 50 km to 80 km and here the temperature again decreases with height.
(d) Thermosphere- It covers a height from about 80 km to 500 km and the temperature rises with altitude.
(e) Exosphere- It represents the outer part of the atmosphere extending up to space and the region experiences increasing temperature.
(2) This temperature inversion takes place in all the layers of the atmosphere. There is a gradual increase and decrease in temperature from the troposphere to the thermosphere layer.
(3) When the air near the surface of the earth gets heated up, it becomes hot, less dense and the air rises up. As the air rises up, the air cools increasing its density forming a convective cell and clouds are generated. This air when accumulates at the top forms a region that separates from the overlying layer. This causes the temperature inversion in the layers of the atmosphere.
The relatively stable state of equilibrium that living systems maintain by regulating their metabolic processes is known as
what happens to the pressure as you travel down
What adaptations would be found in leaves located in a desert, tropical rain forest, and aquatic environment?
Answer:
Succulent plants store water in fleshy leaves, stems or roots. Several other adaptations are essential for the water storing habit to be effective.
Explanation:
:que ocurre al aire frió y seco incorporado desde el exterior
Science 7. Advanced 16 -17
Two blue flowers are crossed. One is homozygous and one is heterozygous for flower color. If blue is the dominant allele and white is recessive, what will be the ratio of colors in the offspring plants? Which of these choices is correct?
1 white: 3 blue
4 white: 0 blue
2 white: 2 blue
0 white: 4 blue
Which of the following is NOT an example of a complex pattern of inheritance?
incomplete dominance
Punnett square
multiple alleles
polygenic inheritance
Which of the following is NOT part of a chromosome?
proteins
cell
deoxyribonucleic acid
DNA
Proteins are made with the help of _____.
DNA
RNA
PNA
MNA
Each of the following is a form of mutation EXCEPT _____.
replication
substitution
insertion
deletion
If two people are heterozygous for cystic fibrosis, what are the chances that their children will have the disease?
Final answer:
When crossing a homozygous and heterozygous blue flower (dominant blue, recessive white), the offspring ratio will be 0 white: 4 blue. Other answers detail that a Punnett square is not a complex pattern of inheritance, chromosomes do not contain cells, proteins are synthesized with the help of RNA, replication is not a mutation type, and children have a 25% chance of inheriting cystic fibrosis from two heterozygous parents.
Explanation:
When two blue flowers are crossed, one being homozygous and the other heterozygous for flower color, with blue as the dominant allele and white as recessive, the ratio of colors in the offspring plants will be 0 white: 4 blue. This is because the presence of at least one dominant allele (representing the blue color) in the offspring's genotype from either parent will produce a blue phenotype in all offspring.
A Punnett square is NOT an example of a complex pattern of inheritance; it is a diagram used to predict the genotype and phenotype outcomes of a genetic cross. Complex patterns of inheritance include incomplete dominance, multiple alleles, and polygenic inheritance which involve more nuanced relationships between alleles.
The part NOT found in a chromosome is cell. Chromosomes are made up of deoxyribonucleic acid (DNA) and proteins, with specific segments of DNA coding for various genetic traits.
Proteins are made with the help of RNA. During transcription, DNA sequences are transcribed into messenger RNA (mRNA), which is then translated into proteins.
Among the options provided, replication is not a form of mutation. Mutation forms include substitution, insertion, and deletion, all of which directly alter the DNA sequence.
If two people are heterozygous for cystic fibrosis, the chances that their children will have the disease is 25%. This is because both parents carry one recessive allele for the disease (being heterozygous), and there is a 1 in 4 chance that the child will inherit the recessive allele from both parents, necessary for expressing the disease.
Is a worm a decomposer ?
Under which of the following conditions is Lactic acid fermentation most likely occur?
A. A very fast run
B. A long walk
C. Sleeping
D. Playing video games
Lactic acid fermentation is most likely to occur during a very fast run, as the intense activity causes muscles to run out of oxygen and switch to fermentation to produce energy.
Explanation:Lactic acid fermentation is most likely to occur under conditions where the muscles have run out of oxygen and need to find an alternative way to produce energy. Among the options provided, A. A very fast run is the condition under which lactic acid fermentation is most likely to occur. When muscles are used to the point of fatigue, such as during an intense activity like a sprint, there isn't enough oxygen supplied to the tissues to meet the high energy demands. This causes the muscle cells to switch from aerobic respiration to lactic acid fermentation, a process where pyruvate is reduced to lactate by NADH, thus regenerating NAD+ which allows glycolysis to continue producing ATP.
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PLEASE HELP! Explain how fault block mountains are formed
Write a sentence with the words: mass extinction, environment, and adapt.
What are the three ways in which an atom can form bonds with other atoms?
Answer:
Electrons can be transferred from one atom to another, via ionic bonding. Electrons can be shared between neighboring atoms, through covalent bonding. Electrons can be shared with all the atoms of a material in an uneven, but possible, sharing.Explanation:
As we know, atoms are the smallest particles of matter and represent the true creators of matter and everything that occupies space and has mass. Atoms are composed of electrons, protons and neutrals.
Electrons allow one atom to interact with another, forming bonds that allow something tangible to be created. This interaction can occur in three ways:
Electrons can be transferred from one atom to another, via ionic bonding. Electrons can be shared between neighboring atoms, through covalent bonding. Electrons can be shared with all the atoms of a material in an uneven, but possible, sharing.