The lymphatic system: has a pumping mechanism to move fluid includes:
Includes areas of high concentrations of APCs, T and B cell.Is the site of B and T cell clonal deletion.What are the 6 lymphatic organs?Lymphoid organs are:
Bone marrow. Thymus.Lymph nodesSpleen. Tonsils.Mucous membranes.Thus, option "A and B" is correct, it helps in pumping mechanism to move fluid.
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What part of the blood carries the oxygen?
a. the heme group of hemoglobin
b. the platelets
c. the nucleus of the red blood cell
d. the white blood cells
Explanation:
. the nucleus of the red blood cell is the write answer
What are two major external characteristics that distinguish mammals from other animals.
Explanation:
Two characteristics are used to define the mammal class. They are mammary glands and body hair (or fur). Female mammals have mammary glands.
Compare the Early Earth's Atmosphere to today's Atmosphere. What change in the atmospheric conditions impacted life on earth the most?
Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
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if a person changes lotion every week can he or she get cancer
Answer: Maybe
Explanation:
It depends on the lotions used. Many lotions can have cancer-causing ingredients. If you are using mainstream lotions then there is a decent chance you will use one that can cause cancer.
As part of an investigation of the population of foxes in San Miguel island, a scientist graphed the number of foxes present on the island over a span of 15 years, as shown below. The study began with year 0 and ran until the start of year 15.
Of the 500 eggs produced by a certain female frog only 10 percent developed in adult frogs. Which part of Darwin’s theory does the best illustration?
Answer:
Mutations occur by chance
Competition between species occurs over many resources including mates habitats dominance and food. students claim that competition can drive evolution in population
Competition is the interaction of individuals that for a common resource that is in limited supply, but more generally can be defined as the direct or indirect interaction of organisms that leads to a change in fitness when the organisms share the same resource.
There are two major forms of competition. Two of them are interference competition and exploitation competition are categorized as real competition. Interference competition occurs directly between individuals, while exploitation competition and apparent competition occur indirectly between individuals.
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Select the four aspects of the farm bill.
creating an agricultural supply chain
doing conservation work
purchasing surplus grain
allocating food stamp funding
creating maximum prices for crops
setting subsidies for farmers
establishing commodities options
detailing future agricultural research
Answer:
creating an agricultural supply chain
creating maximum prices for crops
setting subsidies for farmers
detailing future agricultural research
Explanation:i had this quiz too and i selected these and i got %100 :)
Runoff has increased in recent years because of human activities. Which activity has
caused the greatest increase in polluted runoff?
A. Higher water usage
C. City urbanization
B. Illegal dumping
D. Irrigation
Answer: B llegal dumping
Explanation:
How does the cell make RNA?
If a cell wants to increase the flow through its cell membrane, what should it do?
Answer:
increasing either the distribution coefficient or the diffusivity for the transported solute.
Explanation:
there isn't a complete direct answer to this question, but this is how permeability can increase within the cell.
Why can things like the sea fans and cuttlefish live in the seas off europe?
Answer:
The Common Sea Fan can be found in patches of reefs and outer areas of the reefs typically in water depths up to 30 meters, and they tend to thrive in areas where the water flow is at a constant speed. The speed of the water is important due to the fact that all sea fans are filter feeders.
Which of the following statements BEST describes a relationship between two animals in the diagram? A.The turtle and fish have gills. B. The turtle and prairie dog have gills. C.The turtle and prairie dog are cold-blooded. D. The turtle and fish are cold-blooded.
Answer:
D. The turtle and fish are cold-blooded.
Explanation:
Some cold-blooded animals include insects, worms, fish, amphibians, and reptiles.
All creatures except mammals and birds are cold-blooded.
Compare between Aorta Artery and pulmonary Artery in 2 points
Answer:
The human heart is a muscular organ which consists of four chambers and is responsible for the pumping of blood across the whole body. The heart possesses a network of blood vessels like arteries, veins and capillaries. Two of the five blood vessels that enter or leave the heart directly are the aorta and the pulmonary artery, And the Aorta is the largest artery, which carries oxygenated blood from the left ventricle of the heart to other parts of the body. In contrast, the pulmonary artery carries deoxygenated blood from the right ventricle of the heart to the lungs with the aim of purification.
Explanation:
compare electron and light microscope
The electron microscope uses a beam of electrons for magnifying the real image of an object. While the light microscope uses visible light to magnify the images of miniature substances or biological specimens.
What do you mean by Microscope?A microscope may be defined as an instrument that is to be used to magnify small objects such as biological cells, minerals samples, etc.
Electron microscopes have a higher level of magnification and a threat of radiation leakage as compared to the light microscope. In the electron microscope, image formation relies on the scattering of electrons while it depends on light absorption in the light microscope.
The electron microscope offers high resolution and is thus expensive as compared to the light microscope.
Therefore, it is well described above.
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A pair of membranes enclosing the nucleus with pores allowing the movement of molecules in and out of the nucleus is the nuclear.
Answer:
The nuclear membrane encloses the nucleus in eukaryotes. The membrane is penetrated by nuclear pore complexes.
Explanation:
The nuclear membrane (nuclear envelope, nucleolemma) isolates the interior of the nucleus from the cytoplasm. The membrane has two layers enclosing a distinct inner lumen (em). The nuclear membrane is penetrated by large nuclear pore complexes, which selectively transport molecules into or out of the nucleus. The luminal space within the double-layered nuclear membrane is continuous at points with the endoplasmic reticulum, a membrane-enclosed organelle (continuous with the outer nuclear membrane) to which are attached ribosomes (em2) executing translation of genetic coding into polypeptides and proteins.
Type V intermediate filaments are lamin proteins that have a nuclear signal sequence and form a filamentous support called the nuclear lamina just beneath the inner nuclear membrane. The lamina a net-like meshwork array that lines the inner nuclear membrane and governs the shape of the nucleus. Of the three nuclear lamin proteins, two are alternatively spliced products encoded by a single gene, while the third lamin is encoded by a separate gene. Nuclear lamins form a fibrous network that supports the nuclear membrane.
Lamins have a very long rod domain and carry a nuclear transport signal, they are located in the nucleus just beneath the nuclear envelope so they are vital to the re-assembly of the nuclear envelope after cell division. Lamins are phosphorylated at the end of prophase and this causes them to disassemble simultaneous with dissolution of the nuclear envelope. After cell division, they are dephosphorylated just before the nuclei of the daughter cells form and lamin filaments reassemble around each set of chromosomes. They are continuous except for a break at the sites of nuclear pore complexes. Lamins were probably the first intermediate filaments to evolve. Controlled by cdc2 kinase, lamin filaments disassemble prior to or early in mitosis then reassemble after cell division. Phosphorylation of serine residues in the N-terminal domain of lamin A by cdc2 kinase induces the disassembly of intact filaments and prevents reassembly.
Nuclear lamins help attach the chromosomes to the nuclear membrane and provide anchorage points for the nuclear pores. It is believed that nuclear lamins are the evolutionary ancestor of cytoplasmic intermediate filaments, which evolved through duplication and translocation of the gene product to the cytoplasm
Drag each item to indicate whether it is an example of water used in the production of food or energy.
What is the formula for alcohol fermentation? (Hint- ethyl alcohol formula is C2H66O)
Answer:CH3COCOO− + H+ → CH3CHO + CO
Explanation:
24
Everyone has different
so there's no point in comparing yourself to others.
OA hair and skin color
OB. strengths and abilities
OC interests
D. ethnicities
Answer:
Option B. makes the most sense to me.
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Compare and contrast how the following organisms reproduce: humans, flatworms, and ferns.
Human reproduce by two parent, fern by spores and flatworms by both one and two parent reproduction.
How humans, flatworms, and ferns reproduce?Humans reproduce by mating of male and female. This is called two parent reproduction while on the other hand, flatworms reproduce both one parent and two parent reproduction.
Ferns do not produce flower and reproduce from spores. These spores are like seeds which germinate into a new fern plant.
So we can conclude that human reproduce by two parent, fern by spores and flatworms by both one and two parent reproduction.
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Which taxonomic domain would the following organism be classified with the following characteristics?
no membrane enclosed nucleus
can be classified by shape
exisits all over the world in many types of environments
Domains are classified by scientist Carl Woese on the basis of presence of nucleus in cells, their ability to make food, and the number of cells in organism bodies.
What is domain and types?Domain is defined as the highest taxonomic rank in the hierarchical biological classification system, above the kingdom level. There are three domains of life namely the Archaea, the Eucarya and the Bacteria.
Archea do not have a nucleus whereas Eubacteria have a non-enveloped nucleus and Eukarya have enveloped nucleus.
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Describe what occurs during the process of seed development.
Answer:
water is absorbed by the embryo, which results in the rehydration and expansion of the cells.
Explanation:
Whats the difference between genotype and phenotype.
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The genotype is a set of genes in the DNA which are responsible for the unique trait or characteristics. Whereas the phenotype is the physical appearance or characteristic of the organism. Thus, we can find the human genetic code with the help of their genotype.Organisms may look the same but still may not have the same genotype. One can determine the genotype by the biological tests. On the other hand, the phenotype is determined by an individual’s genotype and can be expressed as genes or by the visible traits. Such traits are hair color or type, eye color body shape, and height, and many such more. It will depend on the genotype but also influenced by the factors existing in the surrounding.Both Earth systems and life systems had to evolve to create habitats before the evolution of new life-forms could occur. Which of the following could be used as evidence to support this
statement?
A.Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with rocks (axidation), resulting in increased rates of weathering for soil
production. Life system: land plants evolve and take root in terrestrial soil.
B.Life system: cyanobacteria begin photosynthesis and produce oxygen. Earth system: free oxygen reacts with all available dissolved iron in the ocean. Life system: mass extinction
event of anaerobic organisms occurs from buildup of oxygen in the ocean.
C.Earth system: oxygen moves from the ocean to the atmosphere through gas exchange. Earth system: free oxygen reacts with incoming solar radiation to form ozone. Earth system:
ozone collects in the stratosphere to form the protective ozone layer.
D.Earth system: molten Earth forms into layers based on density and pull of gravity. Earth system: Earth cooled, and the water vapor in the atmosphere condensed and created the
oceans. Life system: cyanobacteria evolved.
Answer:
A
Explanation:
The cyanobacteria were already there without the oxygen, so that rules out A and a lot of prokaryotes were anaerobic, so that rules out Finally, Photosynthesis does not require oxygen. Instead, Oxygen is a waste product of it.
What is photosynthesis?
Photosynthesis is a process that occurs in the chloroplast organelle of plant cells. The typical light reaction of photosynthesis takes place inside the thylakoid membrane of the chloroplast. The chief reactants such as water and carbon dioxide participate in the reaction. The water gets oxidized in the reaction to release oxygen as a product. The carbon dioxide gets reduced.
Thus, Photosynthesis is a process that occurs in the chloroplast organelle of plant cells
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A group of scientists build a special enclosure in the local bay to separate their experiment from the rest of the ocean. They wish to determine whether their experiment is a closed system by using a colored dye that is placed in the water. What result would best indicate that their experiment is a closed system, and why?
Answer:
Well, If the dye is found outside of the system then it would mean that there was an opening somewhere making it an open system. If there was not dye found in the surrounding areas then that means its a closed system.
Note: Glad I could help!
If the dye is found outside of the system then it would mean that there was an opening somewhere making it an open system. If there was not dye found in the surrounding areas then that means its a closed system.
What are the differences between open and closed system?An open system can exchange both energy and matter with its surroundings. The stovetop example would be an open system, because heat and water vapor can be lost to the air. A closed system, on the other hand, can exchange only energy with its surroundings, not matter.
One might describe a thermos as a closed system because it only allows energy to enter and leave it; but not matter (because it won't spill).
Open systems in thermodynamics allow matter as well as energy to enter and leave. For example this coffee cup is an open system when compared to the thermos.
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Blood Vessels Blood flows through the circulatory system in blood vessels:Arteries are large vessels that carry blood away from the heart to the tissues of the body. Except for the pulmoNry arteries, all arteries carry oxygen-rich blood.Capillaries are the smallest vessels. Their thin walls allow oxygen and nutrients to pass from blood into tissues and wastes to move from tissues into blood.Veins return blood to the heart. Many have valves that prevent backflow. The contractions of the heart produce a wave of fluid pressure in the arteries, known as blood pressure. Without that pressure, blood would stop flowing through the body. The body regulates blood pressure through actions of the brain and the kidneys.
6. As blood flows through the body, it passes through three types of blood vessels. Complete the table by Nming each type and describing its structure and function.
Blood vessels
Structure
Function
Answer:
Arteries = Transports blood away from the heart. They carry oxygenated blood away from the heart and to the body with the exception of the pulmonary artery that takes deoxygenated blood from the heart to the lungs to be oxygenated. They have large muscular walls to withstand the pressure of the heart beats and since there is such large pressure, they have smaller lumen compared to the veins as the pressure drives the blood forward.
Veins = Transports blood to the heart. They tend to carry deoxygenated blood to the heart except for the pulmonary vein. Large lumen and small muscular walls with valves. The large lumen is so that more blood can flow through the veins as there's less pressure which is also why there are smaller muscular walls. There are also valves in the veins to prevent the backflow of blood.
Capillaries = Allows gas exchange and waste diffusion into blood. It is also one cell thick to allow diffusion to happen efficiently and the small structure increases the surface area to volume ratio.
Please Help 100 Points! A DNA molecule is found to contain 40% of the nitrogenous base thymine(T). What percent of Nitrtogenous base adenine(A) does this molecule contain?
A. 20% C. 60%
B.40% D.80%
From a classification standpoint, which of these organisms shares the LEAST similarities with humans?
A. Prosimians
B. Birds
C. Fish
D. Insects
Answer:
a
Explanation:
Explanation:
Not prosimians , correct result plis
Cancer is the uninhibited growth of cells. Which of the following would be most likely to
cancer?
Carcinomas that begin in different epithelial cell types have specific names: Adenocarcinoma is a cancer that forms in epithelial cells that produce fluids or mucus. Tissues with this type of epithelial cell are sometimes called glandular tissues. Most cancers of the breast, colon, and prostate are adenocarcinomas.
How many cherry pies have 90 or more cherries?
Answer:
6 pies
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