In order to perform an experiment, a chemist needs an element that has similar properties of sodium (Na) but has a lower atomic mass. Which element should the chemist select for the experiment?

Answer:

Following are the roles of the digestive, excretory and endocrine systems in terms of homeostasis:

Explanation:

Role of Endocrine System:

The endocrine system mediates all the chemical signaling in the body.

Hormones are chemical messengers that the endocrine system uses to maintain chemical homeostasis.

Endocrine system manages glucoregulation by controlling the secretion of the hormones glucagon and insulin by the pancreas. Low and high blood sugar levels are sensed by the brain which then signals the endocrine system to release glucagon and insulin respectively.

The endocrine system is also indirectly involved in thermoregulation. A low core temperature signal received by the hypothalamus initiates the release of TSH by the pituitary gland and then that of T3, T4 thyroid hormones that stimulate shivering thermogenesis in the skeletal muscles.

Role of Digestive System:

The digestive system regulates the amount of nutrients absorbed in the body.

Although the absorption of nutrients in food is not exactly according to bodily needs, the absorption of dietary iron and calcium is strictly regulated by the digestive system.

Role of Excretory System:

The excretory system carries out osmoregulation which is the maintenance and regulation of water and salt levels in the blood.

The excretory system regulates the excretion of toxic waste from the blood.

Excess water, salts, urea and bilirubin (produced as a result of RBC break down) are some of the excretions.

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Answer:

Following are the roles of the digestive, excretory and endocrine systems in terms of homeostasis:

The endocrine system regulates the secretion of various hormones and homeostatic mechanisms in response to signals of the hypothalamus and pituitary glands.

The excretory system maintains homeostasis by purifying the blood and getting rid of toxic waste from the blood.

The digestive system is mainly involved in the transfer and regulation of nutrients from food.

Explanation:

Role of Endocrine System:

The endocrine system mediates all the chemical signaling in the body.

Hormones are chemical messengers that the endocrine system uses to maintain chemical homeostasis.

Endocrine system manages glucoregulation by controlling the secretion of the hormones glucagon and insulin by the pancreas. Low and high blood sugar levels are sensed by the brain which then signals the endocrine system to release glucagon and insulin respectively.

The endocrine system is also indirectly involved in thermoregulation. A low core temperature signal received by the hypothalamus initiates the release of TSH by the pituitary gland and then that of T3, T4 thyroid hormones that stimulate shivering thermogenesis in the skeletal muscles.

Role of Digestive System:

The digestive system regulates the amount of nutrients absorbed in the body.

Although the absorption of nutrients in food is not exactly according to bodily needs, the absorption of dietary iron and calcium is strictly regulated by the digestive system.

Role of Excretory System:

The excretory system carries out osmoregulation which is the maintenance and regulation of water and salt levels in the blood.

The excretory system regulates the excretion of toxic waste from the blood.

Excess water, salts, urea and bilirubin (produced as a result of RBC break down) are some of the excretions.

Answer:

1) The word ‘evolution’ was first mentioned in the book ‘The Origin of Species’ in 1859, by Charles Darwin. Darwin put forward the concept of evolution during his journey to the Galapagos Islands. 

2)Natural selection is an important mechanism of evolution. It states that the organisms that are able to survive and reproduce with the changing environmental conditions are selected by nature while the ones that cannot survive are eliminated.

3) Evolution mainly deals with the origin of life on earth. The conditions and the forms of life on earth were entirely different from what we see today.

please forgive me I cant answer 4th one..

5)Charles Darwin, an English naturalist of the 19th century made an extensive study of nature for over 20 years. 

1. The fossil record provides crucial evidence for biological evolution. Fossils are the preserved remains or traces of past organisms, providing a record of life on Earth over millions of years.

By studying fossils, scientists can observe changes in organisms and their characteristics over time. Fossils show a progression of simpler life forms in older layers to more complex ones in more recent layers.

2. Natural selection is a mechanism for biological change because it leads to the adaptation of populations to their environments over time. It is based on the concept that individuals within a population exhibit variation in traits, and those traits that enhance survival and reproduction are more likely to be passed on to future generations.

Through natural selection, individuals with advantageous traits have higher chances of surviving and reproducing, leading to the increased frequency of those traits in subsequent generations.

3. Chemical evolution, also known as abiogenesis or prebiotic evolution, explains the origin of life on Earth by proposing that life arose from non-living matter through a series of chemical reactions.

According to this theory, in Earth's early conditions, simple organic molecules formed from inorganic compounds through processes like lightning, volcanic activity, and reactions in the atmosphere and oceans.

These molecules then underwent further reactions, leading to the formation of more complex molecules like amino acids and nucleotides, which are the building blocks of proteins and nucleic acids, respectively.

4. Scientific theories such as biological and chemical evolution represent the strongest explanations for the changes observed in the fossil record because they are supported by extensive evidence from multiple scientific disciplines.

These theories have withstood rigorous testing, scrutiny, and peer review over many years. They are based on a large body of evidence, including the fossil record, comparative anatomy, genetics, molecular biology, and observations of natural populations.

5. Scientific theories on evolution and the fossil record can change over time as new evidence is discovered, technologies advance, and scientific understanding improves.

The process of scientific inquiry involves continuous investigation, testing, and refinement of theories based on new data and observations.

As scientists gather more evidence from fossil discoveries, genetic studies, experimental research, and other fields, our understanding of evolution and the fossil record can deepen and evolve.

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Answer:

c

Explanation:

well volunteers are use to help and learn so i think c is the correct answer

Answer:

hi

Explanation:

i think they can't.But they can regrow their arms

have a nice day

Answer:

I think it's 10% because some of it turns into heat energy

Explanation:

On average, about 90% of the energy is lost from each tropic level. The remaining 10% is available for the next trophic level.

The tropic level of the organisms is the position of organisms occupied in the food web. When an organism consumes other organisms as its food, the energy stored in the form of chemical energy in the organic molecules is converted into the energy used for cellular respiration.

This conversion is not efficient and the energy is lost in the form of heat. Some of the energy is used for growth and maintenance. While other energy is excreted.

Thus, when an organism consumed organic matter, 90% of the energy is lost and 10% of the energy is involved in the building of body tissues. This 10% of energy is passed to the next level.

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Answer:

Planets that are farther tend to have gas surfaces, a bigger diameter, and more moons. Planets closer to the sun have the opposite.

Answer: It's C and E, got it wrong because of this kid so it's not A and D

Explanation:

C. Carbohydrates

Hope you find this helpful

Although it is possible to have more than one state, it is also possible to have only one state.Explanation:

Answer: I think the correct answer is A or B.

Explanation: But i highly suggest B

Radiocarbon  dating is a feasibe method because the isotopes involved  decay at a constant rate.

The term radiocarbon dating refers to the use of carbon in the establishment of the age of a sample. This is usually done by the use of carbon -14 isotope.

The reason why radiocarbon dating can be used to determine the accurate age of these items is that they contain radioactive isotopes that decay at a constant rate.

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Space hurricanes are caused by streams of plasma unleashed from the sun in what's known as the solar wind.

This is a phenomenon in which charged electrons and plasma make up a storm instead of rain and wind.

The plasma is usually unleashed from the Sun which is why option A was chosen as the most appropriate choice.

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Answer:

Earth's Surface rise and climate. You are basically looking at the weather and the condition of the atmosphere.

Explanation:

When the average temperature at the Earth's surface rise, evaporation occurs more which causes precipitation to also occur more.

Answer:blue

Explanations :

Answer:

an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable(s).

Hello there!!

I love protozoa so this should be fun.

1. Protozoans are unicellular beings that live in wet environments.

2. Protozoans have 2 prevalent ways of feeding:

a) the most common is utilized by heterotrophs like amoeba. An amoeba extends its elastic body until it completely surrounds the victim. Then the amoeba simply has to digest its food.

b) The second most common is through cilia. Paramecia use this method. The hair-like cilia in its mouth catch hold of food and push the meal into the paramecium's digestive tract.

3) The only protozoan to have its own family is Euglena.

4) Euglena has its own family because it has chloroplasts (meaning it can undergo photosynthesis) but it can also feed like a heterotroph. Because Euglena exhibits both plant and protozoan qualities, it has its own category.

5) Rotifers move by two spinning wheels of cilia. This type of propulsion makes the rotifer a speedy little protozoan.

I hope this answers your question. :)

Answer:

B

Explanation:

Sickle cell anemia is an autosomal recessive trait, meaning two recessive alleles must be acquired by the child (one from each parent) for them to be affected with the disorder.

Answer:5 Understanding Your Septic System And Water Quality ... 3.1.3 Constructed Wetlands: A New Concept In Treating Wastewater. Section 3.2. On-site ... ground information on water supplies, the water cycle, ... We use water in so many ways that we take it for granted ... water on earth, is liquid fresh water available for most.

Explanation:

Genetic recombination is most closely associated with: Choice D: Viral replication in host cells

Definition:

Genetic recombination (otherwise termed genetic reshuffling) is simply the exchange of genetic material between different organisms which leads to production of offspring with combinations of traits that differ from those found in either parent.

In retroviruses, recombination actually occurs at the point during replication when the retrovirus genome is in a DNA form and takes place by the same break-rejoin technique as in cells and DNA viruses.

Recombination can occur both between two related retroviruses and between the retrovirus DNA and the host DNA.

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Arrow 4 show convection. Thus option 4 is correct.

What is convection ?

The process in which transfer of heat occurs by movement of a heated fluid either air or water called as convection.

Initially the heat transfer through conduction, however a bulk heat transfer takes place due to the motion of the fluid.

The mechanism of convection involved,  fluid is heated from below, leads to thermal expansion.

So that the lower layers,  which are hotter now, become less dense.

So the less denser layer replaced by colder layer due to buoyancy nd colder layer is more dense.

This process continuously occur  and heat transfer occur through convection

It  occurs in both liquid and gases, may be natural or forced, bulk transfer occur.

Thus option 4 is correct.

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Answer:

The planet pluto originally was considered as a real planet until its demotion as a dwarf planet.

The reason it was demoted was because it was soon realized to not meet the three criteria of the International Astronomical Union used to define a full size planet.

So if pluto was not categorized as a dwarf planet than it would of just fallen under as a planet.

Explanation:

Not mine answer but it from purple6kabi

Answer:

The International Astronomical Union (IAU) downgraded the status of Pluto to that of a dwarf planet because it did not meet the three criteria the IAU uses to define a full-sized planet.

Explanation:

Answer: B. asexual reproduction (budding)

Explanation:

it might help you

Answer:

1. Dendrites

2. Nucleus

3. Soma

4. Axon

5. Myelin Sheath

6. Axon Terminal Button

Explanation:

Answer:

1. Dendrite

2. Nucleus

3. Cell body

4. Schwann cell

5. Myelin sheath

6. Axon terminal

Explanation:

Answer:

Explanation:

1,3,4 hope this helps<3

Answer:

it think it is the marker gene it said that online for me I dont know

if that even is a gene

Answer:

yes

Explanation:

☁️ Answer ☁️

1: "Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules."

2: "The energy stored in the bonds to hold these molecules together is released when an organism breaks down food. Cells then use this energy to perform work, such as movement. "

-GoogIe

(And I love your pfp)

Hope it helps.

Have a nice day noona/hyung.

Answer:

#1. the organs of the nervous system:  This system is made up of the brain, spinal cord

#2. the organ that sensory nerves reach the brain:  Sensory neurons assemble to form sensory nerves that reach the brain through the spinal cord. The brain processes the sensory impulses and sends information to the corresponding effector organs through motor nerves

The small finger like projections are:  axon terminals, The connection between a neuron and a muscle cell is called a neuromuscular junction. The finger-like projections of the axon are the axon terminals. An action potential moves down to the axon terminals where it causes a chemical message called a neurotransmitter to be released into the synaptic cleft.

Explanation:

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Answer:

B. Cell

Explanation:

Order from smallest to most complex:

Cell - Tissue - Organ - Organ system.

Cells are the smallest. Multiple cells working together forms a tissue. Multiple tissues working together forms and organ. Multiple organs form an organ system.

Cell

Cells make tissue, tissues makes  organs, organs make a system.