The digestive system involves all organs responsible for digestion. The four functions of the digestive system are digestion, absorption, excretion and assimilation.
What is digestion?Digestion is the breakdown of complex food materials into their simplest form, which is done by digestive system.
The main functions of digestive system are:
Digestion: breakdown of food.Absorption: The absorption of simple food into blood.Assimilation: movement of digested food molecules into the cells and are used. Excretion: the elimination of waste materials.Thus, these are the four functions of digestive system.
For more details regarding digestive system, visit:
https://brainly.com/question/32531
#SPJ2
The oxygen end of the molecule has a slightly negative charge while the hydrogen ends of the molecule have a slightly positive charge. The composition and polar covalent nature of water allow water molecules to be attracted to and form _________.
Water is a polar molecule with a slightly positive charge on the hydrogen ends and a slightly negative charge on the oxygen end due to differences in electronegativity. This leads to the formation of hydrogen bonds, with polar molecules being hydrophilic and nonpolar ones being hydrophobic.
Explanation:Water is a polar molecule due to the slight positive charge on the hydrogen ends and the slight negative charge on the oxygen end. This is due to the electrons being more attracted to the oxygen's nucleus because it is more electronegative. The polar nature allows water molecules to attract each other and other polar molecules, which leads to the formation of hydrogen bonds. Nonpolar substances, like oils and fats, do not readily form hydrogen bonds with water and are thus hydrophobic. Polar molecules like water, on the other hand, are hydrophilic. The polarity of a water molecule arises from the greater electronegativity of oxygen relative to hydrogen, resulting in a distribution of charge in the molecule.
Learn more about Water as a polar molecule and hydrogen bonds here:https://brainly.com/question/11045924
#SPJ3
A scientist used a laboratory model to test the effect of radiation, or the sun, in heating land and water on Earth. To do this experiment, 200 mL of water and dry sand were placed in to 2 separate 250-mL beakers. Each beaker was then placed under the same lamp. Temperature readings were taken of each substance every 2 minutes for 8 minutes.
Use the data table to answer the following questions.
Substance Heated
Starting Temp (°C)
2 min
4 min
6 min
8 min
Water
18
18.5
19.5
21
22
Dry Sand
18
20
22
24
26
Identify the manipulated variable and the responding variable in this experiment. Explain your reasoning.
In this experiment, the manipulated variable is the type of substance, while the responding variable is the temperature of the substances over time.
Explanation:Manipulated variable: The manipulated variable in this experiment is the type of substance (water or dry sand) being heated under the lamp.
Responding variable: The responding variable is the temperature of the substance, as it changes over time in response to the heat source.
The scientist manipulated the type of substance (water or sand) and observed how the temperature of each substance responded to the heat source, identifying the manipulated and responding variables.
complete the model of the lactic acid process
During a storm, several butterfly eating during a birds were blown to a distant Island. The Island, which previously had no birds, was filled with butterflies of all colors. One year later, all the butterflies or dark green and brown. Which is the following is most likely explanation for the change in the butterfly population
The most likely reason for the change in the butterfly population to darker colors is natural selection due to bird predation. Dark-colored butterflies had a survival advantage and became more common over time.
The most likely explanation for the change in the butterfly population is natural selection. When birds introduced to the island began preying on butterflies, those with darker colors, such as dark green and brown, had a survival advantage because they were better camouflaged against predators. Over time, this led to an increase in the population of darker-colored butterflies, similar to how the peppered moths in England changed color due to soot from the Industrial Revolution.
Steps of Natural Selection:
Variation: Initially, the butterfly population had a range of colors.Selective Pressure: The introduction of bird predators created a new threat.Survival Advantage: Darker butterflies were less visible to predators and more likely to survive and reproduce.Shift in Population: Over generations, darker butterflies became more common as they were selectively favored.This scenario illustrates how environmental pressures can lead to changes in the traits of a population over time through the process of natural selection.
Hydrogen bonds can form between regions of polar molecules that are
Hydrogen bonds form between the positively charged hydrogen atoms and negatively charged atoms in polar molecules. Examples of such interactions include DNA's double-stranded structure and protein's three-dimensional structure. Despite their individual weakness, combined hydrogen bonds can exert a significant force.
Explanation:Hydrogen bonds can form between regions of polar molecules that are positively and negatively charged. This is due to the presence of a polar covalent bond containing hydrogen. In this bond, the hydrogen atom has a slightly positive charge because its electron is pulled more strongly towards the other element and away from the hydrogen atom. This can result in a weak interaction known as a hydrogen bond.
For example, hydrogen bonds help hold together the double-stranded structure of DNA and contribute to the three-dimensional structure of proteins. They can also form between water molecules due to the polar nature of water, where the oxygen atom has a slight negative charge and the hydrogen atoms have slight positive charges.
These hydrogen bonds, although individually weak, can combine in large numbers to exert a significant force. They form when a slightly positive hydrogen atom already bonded to one electronegative atom (usually oxygen or nitrogen) is attracted to another electronegative atom from another molecule.
Learn more about Hydrogen Bonds here:https://brainly.com/question/33738484
#SPJ12
How is matter conserved in the carbon cycle?
A) Carbon absorbs energy and later releases the same amount of energy.
B) Carbon changes from one form to another, but the total amount of carbon remains the same.
C) People manage carbon resources, such as factory emissions, so they do not run out of carbon.
D) Some forms of carbon, such as carbon dioxide stored in carbonate rocks, may remain in the same location for years.
Which plant adaptation would likely be found in the taiga?
Answer: Which plant adaptation would likely be found in the taiga?
C) small needle-like evergreen leaves
Explanation: C) Is the Correct Answer
Small needle-like evergreen leaves. Evergreen forests of pine, spruce, fir, and juniper are found in the taiga. The other adaptations are for B= rainforest, A= swamp, D= desert.
Next Question
How many amino acids would be encoded in the sequence 5′ AUGUUACGGAAU 3′ by a non-overlapping and maximally overlapping code?
Classify each of the following as an autotroph or a hetoratroph
A.) Earthworm
B.) snail
C.) Fungus/ Mushroom
(HELP QUICK PLEASE)
It is actually science but there is not a science option so i will make it biology
Both earthworms and snails are heterotrophs, eating organic matter or plant material. Fungi, such as mushrooms, also heterotrophs that absorb nutrients from their surroundings, often from decaying organic matter.
Explanation:The organisms are classified as follows:
A.) Earthworm: Heterotroph. Earthworms eat dead plants and animals, decomposing them and effectively recycling nutrients back into the soil.B.) Snail: Heterotroph. Snails eat a variety of foods which are usually organic matter or plant material.C.) Fungus/ Mushroom: Heterotroph. Fungi, such as mushrooms, absorb nutrients from their surroundings, often from decaying organic matter.Autotrophs are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals. Heterotrophs cannot produce their own food and depend on other organisms — both plants and animals — for nutrition.
Learn more about Autotrophs and Heterotrophs here:https://brainly.com/question/29172825
#SPJ3
Living things can be made of one cell or many. In the cell, the nucleus is the control center and directs the activities throughout the cell. The cell is a system just like the human body is a system. Cell:nucleus as human body: __________ (20 points for answering)
A) brain
B) heart
C) liver
D) stomach
What three factors led to the overthrow of the Chaldean empire? Explain.
One of the factors that lead to the downfall of the Chaldean empire was the Persian invasion. Although Belshazzar tried to fend off the Persian army, it was too massive to hold off. Another factor would be that Belshazzar was also betrayed by Gobryas, which lead the forces against the Persian army even at greater advantage. Other than the governor, there were also other parties in the state that were also against the Chaldean kingdom. Lastly, there were also the foreign Jew exiles whom Cyrus the Great allowed autonomy and freedom to go back to their homes. From there, it was Cyrus the Great who brought the fall of the Chaldean empire.
Why are scientists concerned that currently unknown medicinal plants may never be discovered?
Answer:
Because they could bring many benefits to medicine and provide relief to many sick people.
Explanation:
Medicinal plants have been used for a long time by our ancestors and are known to have an important role in the cure and treatment of some diseases. In some communities, these plants symbolize the only way of treating certain pathologies. It is estimated that approximately 80% of the planet's population has already used some vegetable to relieve symptoms of some disease.
However, there are medicinal plants that are unknown to science, which concerns not only scientists, but also health professionals in general. This is because these plants would provide the advance of medical sciences in a cheap and fast way, besides being able to help many sick people. However, none of this will happen if these plants remain unknown.
using the diagram above, which layer is the densest?
The part labelled D which is the inner core is the densest layer, option D.
What are the layres of the Earth?The diagram is a cross-section of Earth. The Earth's layers, in order from the exterior to the interior, are:
A. Crust - This is the outermost layer of the Earth, relatively thin and solid.
B. Mantle - This is the layer beneath the crust, made up of solid and semi-solid rock.
C. Outer Core - This layer is composed of liquid iron and nickel.
D. Inner Core - The innermost layer, consisting of solid iron and nickel.
The density of Earth's layers increases with depth due to the weight of the layers above and the increasing pressure. The densest layer is the Inner Core (D). It is solid despite the high temperatures because the intense pressure from the overlying layers prevents it from melting.
Find out more on Core here; https://brainly.com/question/31088598
#SPJ2
Explain the importance of optics development for biology (microscope)
Optic microscopes are one of the most important tools to diagnose tissue samples, to discover the existence of microorganisms and then study them, study the structure of the cells, and to see other smaller parts of plants, fungi and animals. Through the development of this microscope, and the others, we discover more and more small objects not visible to the naked eye but that they exist.
The process below is exothermic, so what is true about the bond energies of the reactants and products? 2H2+O2→2H2O
A. Bond energy in the reactants is greater than bond energy in the products.
B. Bond energy is equal in both the reactants and the products.
C. Bond energy in the products is greater than bond energy in the reactant.
D. Bond energy is absorbed by the products.
A. because exothermic means releasing energy so the product would have less energy
In an exothermic process like 2H2+O2→2H2O, the bond energy in the reactants is greater than the bond energy in the products.
Explanation:The process 2H2+O2→2H2O is an exothermic reaction, meaning energy is released during the course of the reaction. In an exothermic reaction, the total bond energy of the reactants is more than the total bond energy of the products. The difference in energies is released as heat. Therefore, the correct answer to the question is: A. Bond energy in the reactants is greater than bond energy in the products.
To be more specific, when the bonds in the reactants (hydrogen and oxygen) break down, energy is required. However, when new bonds form to create water, energy is released. If the energy released is more than the energy absorbed, the reaction is exothermic.
Learn more about Exothermic Reaction here:https://brainly.com/question/9799465
#SPJ2
Which of the following is NOT an example of a graphic indicator which can help you understand the main purpose of a text? A. Subtitles B. Tables C. Bold font D. Page and section numbers
The option that does not represents an example of a graphic indicator that can help you understand the main purpose of a text is the Page and section numbers. Thus, the correct option for this question is D.
What is a Graphic indicator?A graphic indicator may be defined as a type of uncomplicated and simple illustrated graphic that takes up a small amount of space and delivers a quick, instinctive representation of a theme, topic, or action.
According to the context of this question, the examples of a graphic indicator can assist you in order to understand the fundamental purpose of a text including subtitles, tables, bold font, etc. while it does not include page and section numbers. This is because page and section numbers are provided for the ease of the readers.
Therefore, the option that does not represents an example of a graphic indicator that can help you understand the main purpose of a text is the Page and section numbers. Thus, the correct option for this question is D.
To learn more about Graphic indicators, refer to the link:
https://brainly.com/question/25721926
#SPJ2
ASAP!!!! What should be placed in the center of the this diagram?
A) World War II
B) The Korean War
C) The Vietnam War
D) Cuban Missile Crisis
The process below is exothermic, so what is true about the bond energies of the reactants and products? 2H2+O2→2H2O
a.Bond energy in the reactants is greater than bond energy in the products.
B.Bond energy in the products is greater than bond energy in the reactant.
c.Bond energy is equal in both the reactants and the products.
d.Bond energy is absorbed by the products.
The true statement about the bond energies of the reactants and products in an exothermic reaction is: A. Bond energy in the reactants is greater than bond energy in the products.
A chemical reaction is a chemical process which involves the continuous transformation and rearrangement of either the ionic, atomic or molecular structure of chemical elements, especially through the breakdown and formation of chemical bonds, so as to form (produce) a new chemical compound.
In Chemistry, the two (2) main types of chemical reaction are;
Endothermic reaction: it is a chemical reaction in which heat energy is absorbed from the environment . Exothermic reaction: it is a chemical reaction in which light and heat energy is liberated (released) into the environment.Typically, light and heat energy is liberated (released) in an exothermic chemical reaction when the energy of the products is lesser than the energy of the reactants i.e the reactant's bond energy is greater than the product's bond energy.
Read more: https://brainly.com/question/24222328
Which is NOT a living part of an ecosystem?
A. fungus
B. sun
C. tree
D. fly
These unspecialized plant cells synthesize and store organic products. These cells are also the site of the plant's metabolic processes. Which of these BEST fits this specific type of ground plant tissue cell? A) vascular cells B) parenchyma cells C) collenchyma cells D) sclerenchyma cells
Which number represents the location of the Himalayan Mountain Range?
A) 2
B) 3
C) 4
D) 5
A volcano on a remote island erupts. Lava flows over the surface of the small island. The lava cools and forms igneous rock. Based on the diagram of the rock cycle above, what will most likely happen to the igneous rock next?
the igneous rock will be weathered and formed into a sedimentary rock
which biome has the moast constant conditions over the course of the year
What term describes chromosomal abnormality
what type of protist causes Giardia
Special vesicles containing enzymes
Three science questions. Thank you :)
Which of the following has mechanical energy? Battery Burger bun Drawn bow Sunlight
single-celled organisms are able to maintain internal stability because they :
a - contain structures that perform life functions
b - work with other cells
c - carry out photosynthesis to produce food
d - have multiple organisms
One group of students uses different methods to conserve water in the garden as listed below. Method 1: Water the garden when the sun is out. Method 2: Water the garden when the weather is cool. Method 3: Water the garden when it is not windy. Method 4: Water the garden in the afternoon. Which of these methods would conserve the most water? a. Method 1 and Method 4 b. Method 2 and Method 3 c. Method 3 and Method 4 d. Method 4 and Method 2