Answer:
The heart has four chambers and four main blood vessels that either bring blood to the heart, or carry blood away.
The four chambers are the right atrium and right ventricle and the left atrium and left ventricle. The blood vessels include the superior and inferior vena cava. These bring blood from the body to the right atrium. Next is the pulmonary artery that carries blood from the right ventricle to the lungs. The aorta is the body's largest artery. It carries oxygen-rich blood from the left ventricle to the rest of the body.
Beneath the tough fibrous coating of the heart, you can see it beating.
Inside the chambers are a series of one-way valves. These keep the blood flowing in one direction.
Dye injected into the superior vena cava, will pass through all the heart's chambers during one cardiac cycle.
Blood first enters the heart's right atrium. A muscle contraction forces the blood through the tricuspid valve into the right ventricle.
When the right ventricle contracts, blood is forced through the pulmonary semilunar valve into the pulmonary artery. Then it travels to the lungs.
In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left atrium.
From there, blood is forced through the mitral valve into the left ventricle. This is the muscular pump that sends blood out to the rest of the body.
When the left ventricle contracts, it forces blood through the aortic semilunar valve and into the aorta.
The aorta and its branches carries the blood to all the body's tissues.
Reactions occur within the sun to change nuclear energy into electromagnetic energy. This is just one example of…
Answer:
Un ejemplo de reacciones de fusión son las que tienen lugar en el sol, en las que se produce la fusión de núcleos de hidrógeno para formar helio, liberando en el proceso una gran cantidad de energía en forma de radiación electromagnética, que alcanza la superficie terrestre y que percibimos como luz y calor.
Explanation:
primero:atiende a las clases de tu profesor
segundo:no seas vago
nada mas
Throughout the world, in nearly every ecosystem, there are animal and plant species present that were introduced into the ecosystem by humans or transported to the ecosystem as a result of human activities. Some examples are listed in the chart below. 41. State one reason why an introduced species might be very successful in a new environment. [1] ________________________________________________________________ ________________________________________________________________ 42. Identify one action the government could take to prevent the introduction of additional new species. [1]
Answer:
Suitability of environment and tolerance.
Explanation:
Suitability of environment and tolerance is the reason which tells that an introduced species might be very successful in a new environment. The species have all the adaptations that helps in the survival of introduced organism. Strict checking on the airports and destruction of plant species that the person bring with it are the actions take by the government that prevent the introduction of additional new species in the ecosystem.
The difference between the bats in the United States with the Pd fungus and bats found in Europe and China with the Pd fungus was that A. the bats in the United States were immune to the fungus. B. the bats in the United States had a more deadly form of the fungus. C. the bats in Europe and China were dying at a faster rate. D. the bats in Europe and China were healthy.
Answer:
The correct answer is - D. the bats in Europe and China were healthy.
Explanation:
The white-nose disease of bats is caused by the Pseudogymnoascus destructans or Pd fungus that found in cold mines and caves of the bat. It is a fatal disease that leads to the destruction of the bat population in the United States, in north Calorina the population was dropped up to 99 percent. The bats found in Europe and China with the Pd fungus were healthy and do not cause any fatal disease in the population.
Question 3
The difference between pectin an amylopectin is that
1. Pectin has more branching
2. Amylopectin has a - 1,4 glycosidic bonds and pectins have a - 1,6 glycosidic bonds
3. Amylopectin has more branching
4. Amylopectin has a - 1,4 glycosidic bonds and pectins have ß - 1,4 glycosidic bonds
The difference between pectin and amylopectin is that amylopectin has more branching than pectin.
What is pectin?"Pectin consists of a complex set of polysaccharides." This has a linear chains of α-(1–4)-linked D-galacturonic acid.This are mainly found in plants.This helps in binding cells together.What is amylopectin?"Amylopectin is a highly branched macromolecule composed mostly of α-(1→4)-d-glucopyranose units, with α-(1→6)-linkages at intervals of approximately 20 units."These are water insoluble.Hence, the correct option is 3. Amylopectin has more branching.
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A couple of questions about soil and agriculture in the image above. Help if you want
Answer:
1 Land resource is important because humans not only live but also perform all economic activities on land. Besides, land also supports wild life, natural vegetation, transport and communication activities.
2 Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ...
Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ... Water. Water is the second basic component of soil. ...
Mineral. The largest component of soil is the mineral portion, which makes up approximately 45% to 49% of the volume. ... Water. Water is the second basic component of soil. ... Organic matter. Organic matter is the next basic component that is found in soils at levels of approximately 1% to 5%.
Gases.
Microorganisms.
3 Loam soils generally contain more nutrients, moisture, and humus than sandy soils, have better drainage and infiltration of water and air than silt and clay-rich soils, and are easier to till than clay soils.
4 Soil organisms represent a large fraction of global terrestrial biodiversity. They carry out a range of processes important for soil health and fertility in soils of both natural ecosystems and agricultural systems.
5 Soils provide anchorage for roots, hold water and nutrients. Soils are home to myriad micro-organisms that fix nitrogen and decompose organic matter, and armies of microscopic animals as well as earthworms and termites. ... Soil plays a vital role in the Earth's ecosystem. Without soil human life would be very difficult.
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what type of white blood cell produced antibodies ?
Lymphocyte (Cell B)
Explanation
1
Select the correct label on the image.
A well is a structure created to obtain water from deep in the geosphere. From which stage of the water cycle does the well obtain water?
condensation
precipitation
evaporation
groundwater
Answer:
precipitation
Explanation:
Precipitation is the process of water cycle from which the well obtain water because in precipitation water goes inside the well. Precipitation refers to rainfall and snowfall so the water of rainfall goes inside the the soil and reaches the water table which leads to increase in the water level so we can conclude that precipitation is the process which increase the amount of water of the well.
Answer: Groundwater
Explanation:
I got it right!
Which structures are found only in plant cells, not in animal cells?
- [ ] A and B
- [ ] B and C
- [ ] C and D
- [ ] D and A
Answer:
answer is b and c
Explanation:
they have different cells, and chloroplast is only in plant cell
Which of these terms accurately describes Alzheimer's disease?
Autosomal
Complex disease
Recessive
Dominant
Answer:
I think that the answer is Dominant.
Explanation:
Helpful?
Some species form social groups only with members of the same gender. For example, elephants form groups with only females and their offspring. Once the male offspring reach a certain age, they leave the group and become solitary.
Which is a benefit of this type of social group structure?
Females do not have to compete for a mate.
Male offspring can belong to more than one social group.
Adult males can mate with females in several different social groups.
Females are the only ones responsible for taking care of the offspring.
Answer:
Females do not have to compete for a mate.
Explanation:
Due to grouping of animals, females do not have to compete for a mate because each group has its own male. They have a male with which she mate and produce fertile offspring and has a complete family so we can say that the benefit of such type of social group structures is that females do not have to compete for a mate in the population as compared to other animals.
Answer:
A. female's do not have to compete for mates.
Explanation:
Transpiration is evaporation from plants.
TrueFalse
Answer:
true
Explanation:
it's the output of plant leaves
What three structures do sponges most likely lack?
A. Organs
B. Organ systems
C. Cells
D. Lungs
What falls in the gray area between living and nonliving things?
Answer:
Virus
Explanation:
virus falls on the gray area which is between nonliving and living things.
20.
Wheat can vary in color from white to dark red depending on how much red pigment is present. Which genotype will produce the darkest wheat?
AaBBCC
aabbcc
AaBbCc
AABBcc
Answer:
AaBBCC
Explanation:
I think this is it. Hope it helps
What is an anticodon?*
O the bond that holds nucleotides together
O the protein that translates RNA to amino acids
O the abbreviation for amino acids
O three bases on tRNA that attaches to a codon
Answer:
An anticodon is a trinucleotide sequence complementary to that of a corresponding codon in a messenger RNA (mRNA) sequence. An anticodon is found at one end of a transfer RNA (tRNA) molecule.
Explanation:
Which three statements contain information about cats that is based on scientific knowledge rather than opinion?
Answer:
First claim '' cats are very smart animal''. Second claim '' cats make bonds with humans''
Plants are capable of using nitrogen directly from the atmosphere.
True False
1. Which of the following structure when removed, the cell is unable to divide?
Answer:
However, when eukaryotic cells are not dividing — a stage called interphase — the chromatin within their chromosomes is less tightly packed.
Does a computer have internal organization
Answer:
Yes, the operating system is the computers internal organization
Explanation:
banda, compre una planta carnivora (una nepethe), como o que consejos me darian para cuidarla bien
PLEASE HELP!!!
15. the image below shows chromosomes in a human cell
i need answer a, b and c please!
This representation called as karyotype, the gender of the individual is male and this individual have the correct number of chromosomes.
What are chromosomes?Each cell's nucleus contains chromosomes, which are structures that resemble threads and contain the DNA molecule.
Each chromosome is constructed from DNA that has been tightly wound around proteins called histones numerous times to support its structure.
a component that can be found in a cell's nucleus. Proteins and DNA are arranged into genes on a chromosome. There are typically 23 pairs of chromosomes in each cell.
An individual's entire set of chromosomes is known as their karyotype. The phrase can also refer to an image created in a lab showing a person's chromosomes separated from one cell and organized in numerical order.
Present-day female humans have a single set of identical X chromosomes. Instead of a matched pair, male humans have one larger X and one smaller Y chromosome.
Thus, this image, known as a karyotype, shows that the person is male and has the appropriate amount of chromosomes.
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How do mountains play a role in precipitation patterns?
a. As water vapor condenses,the air gets warmer b.it changes the amount of rain received c.it changes the direction of the wind d.as vapor condenses,it depends rain or snow on windward slopes
Answer:
a. As vapor condenses, it depends (specifically; leads to) rain or snow on the windward slope
Explanation:
The orographic effect which is the changes in masses of air as it moves along the mountain sides, up or down is the way the mountains have an effect on the climate
The orographic effect of mountains can be analyzed based on either the windward side, (which is the side that faces the incoming wind), or the leeward side (which is the opposite side of the mountain)
The moist and warm air from the oceans and other large water bodies are carried by wind onto the mountains where the moist wind is directed upward by the obstructing mountain wall.
As the elevation of the warm moist wind increases along the mountain, the cooler temperatures at the high altitudes forces the air to cool down, until the dew point is reached, which leads to precipitation of rain or snow.
list the cell organelles and their functions
strenuous exercise leads to muscle cramp give reason
Explanation:
Cramps can have causes that aren't due to underlying disease. Examples include dehydration, strenuous exercise or lack of muscle use.
HOPE IT HELP YOU MATE ☃️☃️
Answer: Lactic acid
Explanation: The acid is caused by anaerobic respiration, which you do when you do not get enough oxygen
What environmental factor was important for the
Cambrian "explosion of life”?
Answer: the earth was just starting to develop really well and well enough for life.
Explanation: atmospheric oxygen and oceanic calcium levels went up, but nobody needs to know that much facts about how earth developed, But the group called phyla started growing because of these conditions
Answer:
Explanation:
Tôi nghĩ rằng nếu quan trọng thời điểm đó phải là hình thành tầng ozon tạo tiền đề thiết lập hệ sinh thái
please answer the following questions correctly
Answer:
i. Name each of the parts labelled I, II, III, IV and V.
{5 marks}
I - Crown / Enamel
II - Dentine
III - Cement / Periodontal membrane
IV - Jaw bone / Root
V - Pulp Cavity
ii What is the function of each of the parts labelled I and III?
{2 marks}
I - Protects teeth from harmful bacteria
-- Enable teeth withstand pressure of chewing
-- Cutting / chewing / protects dentine / protect pulp cavity
III - hold tooth firmly (in socket / Jaw bone)
iii Which of the labelled parts could be affected by tooth decay?
{1 mark}
V - Pulp cavity
iv State three ways by which tooth decay may be prevented.
{3 marks}
→ avoid using sharp-pointed objects
→ avoid having dry mouth
→ use water containing fluorides to wash teeth / mouth
→ avoid smoking
→ the teeth should be cleaned regularly after each meal / remove food particle from the teeth / flossing
→ wash the mouth vigorously after each meal
→ regular visit to the dentist
→ avoid eating too hot foods
→ avoid eating too much sugary food
→ avoid eating too cold food / taking too cold drinks
Explanation:
Mendel determined from his pea plant experiments that some copies of genes are dominant while others are recessive. Explain how two tall plants could produce a short plant.
why is development work necessary for the development of nation?
Answer:
Development work is necessary for the development of the nation because if the nation will be developed there would be many facilities for the citizens of that nation and development it leads to to economic prosperity.
Explanation:
I hope it help you friend
In chickens, FF produces extreme frizzle (very brittle and curly feathers), Ff has mild frizzle and ff has normal feathers. An extreme frizzle hen is mated with a normal rooster. What will the chickens look like? What will their genotype be?
Cross (parents):
Offspring will look like:
All of the genotypes will be
Answer:
if pure FF and pure ff marry, phenotypic ratio is all Ff or half-half
mild-ruffled feathers for all the chicks
Explanation:
makes sense
The following is a pigment gene from a spider, transcribe and translate it.
G G G T A C A C A A C C G T G C A G C C T A C T G G G
Answer:
The correct answer is -
transcribed (mRNA) - CCC AUG UGU UGG CAC GUC GGA UGA CCC
Translated - Pro- Meth- Cys-Trp-His-Val-Gly- Stop-Pro
Explanation:
Transcription and translation are two steps of protein synthesis from a particular DNA sequence from a genome. The DNA segment called gene produces specific amino acid chains to form a polypeptide chain of the protein.
Transcription is the process that produces mRNA molecule from the DNA sequence that is complementary to the nitrogen base present in the sequence. The only Change in the nitrogen sequence that Adenine changes into uracil, thymine to adenine, cytosine to guanine, and guanine to cytosine.
DNA - G G G T A C A C A A C C G T G C A G C C T A C T G G G
mRNA - CCC AUG UGU UGG CAC GUC GGA UGA CCC
Translation on other hand is the process of translating the encoded information in mRNA molecule to amino acids with help of tRNA and ribosomes.
mRNA - CCC AUG UGU UGG CAC GUC GGA UGA CCC
Translated - Pro- Meth- Cys-Trp-His-Val-Gly- Stop-Pro