Answer:
Digestive tract & Accessory glands together constitute the digestive system.
Explanation:
The accessory organs are the teeth, tongue, and glandular organs such as salivary glands, liver, gallbladder, and pancreas.
8. if a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
a. percentage yield.
b. mole ratio.
c. theoretical yield.
d. actual yield.
Answer:
they are calculating the theoretical yield
Which would cause postsynaptic stimulation to end?.
Options:
A. They depend on the myelination of nerve axons
B. They include EPSPs and IPSPs
C. They are changes in the membrane potential of the postsynaptic terminal of a chemical synapse
D. They are caused by neurotransmitters
Answer:
They include EPSPs and IPSPsThey are changes in the membrane potential of the postsynaptic terminal of a chemical synapseThey are caused by neurotransmitters. Thus, the correct option is B, C, D.What is postsynaptic stimulation?An additional neuron known as a fascilitator is triggered when the postsynaptic neuron receives an unconditioned stimulation. The presynaptic neuron then responds to this cell, leading to sensitization.
When the neurotransmitter separates from its receptor, postsynaptic potentials start to be terminated. After that, the receptor is free to resume its original structural form. The receptor will now reopen ion channels that were opened when the neurotransmitter was attached to it.
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which statement does not apply to experimental surgery on animals?
The statement that does not apply to experimental surgery on animals is that the importance of a sterile surgery is to be decided by the researcher.
What is surgery?A surgical procedure is an intervention that involves the opening of the body of an organism in order to carry it out.
The statement that does not apply in the experimental surgery of animals is that the importance of a sterile surgery is to be decided by the researcher.
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The indigestible part of a plant is called ____. protein carbohydrates fats fiber
Roughage, also known as Dietary Fiber is the indigestible part of a plant.
Answer:
fiber
Explanation:
simply indigestible made of fiber tho
In general, how might recombinant dna technology be used to prevent a genetic disorder caused by a mutation in a single gene?.
Recombinant DNA technology is used to prevent a genetic disorder caused by a mutation in a single gene by reinserting nucleotide sequences in a normal linear order.
What is a gene?A gene is a fragment of single-stranded DNA that is used during transcription and translation to produce a protein.
A mutated gene has a different nucleotide sequence when compared to the normal gene, which can be corrected by using recombined normal sequences.
In conclusion, recombinant DNA technology is used to prevent a genetic disorder caused by a mutation in a single gene by reinserting nucleotide sequences in a normal linear order.
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Certain preparations contain killed or weakened live biological agents that, upon injection into our body, protect the body against those pathogens. what are these preparations called? a. vaccines b. enzymes c. t cells
which list of names is the correct order for filing in an alphabetic system?
The list of names in the correct order using the alphabetic system will have the names listed from the letters A to Z.
What is the correct ordering of names in an alphabetic system?An alphabetic system is a system which orders items based on the ordering of alphabets.
The alphabets in English language are 26 in number from A to Z.
Since no names were provided, the list of names in the correct order using the alphabetic system will have the names listed from the letters A to Z.
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How does Hydrosphere affect atmosphere during Australia bushfire?
What two layers are the smooth muscle cells arranged in?
Answer:
The smooth muscle in the intestine is arranged into two layers: an inner circular layer and an outer longitudinal layer.
The two layers that the smooth muscles cells are arranged in are; an inner circular layer and an outer longitudinal layer.
What are the Intestine Muscles?The smooth muscle cells of the intestine has three layers of smooth muscle that consists of the outer longitudinal, the middle circular, and the inner oblique muscles.
Now, out of all the three layers listed above, the two layers that the smooth muscles cells are arranged in are an inner circular layer and an outer longitudinal layer.
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Having curved or straight thumbs is thought to be a Mendelian trait, and the
straight allele is thought by many geneticists to be dominant. Assuming this is
correct, how would you expect the thumbs of someone with two curved-thumb
alleles to look?
Answer:
considering the straight allele is dominant then the curved thumb allele must be recessive. so,if someone has two recessive alleles they will express that characteristic. Therefore, the person's thumbs would be curved
Which statement best explains why cooperation between countries is necessary to prevent a tragedy of the commons?
Since there are so many common areas, sharing between countries should be easier.
If one country overuses a common resource, it depletes the common resource for all.
Common areas are divided among only a few countries, and little access is given to the rest.
Too many countries have access to common areas, and this prevents them from sharing.
The statement which best explains why cooperation between countries is necessary to prevent a tragedy of the commons is that If one country overuses a common resource, it depletes the common resource for all and is denoted as option B.
What is Tragedy of the commons?This is referred to as a situation in which the resources are available to the people and they are overused due to the ease of access to them.
Cooperation between countries will help to curb a country overusing a common resource which will lead to the depletion of the common resource for all.
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List the four types of stem cells, give an
example of each type, and explain how much
each type
can differentiate
Answer:
Totipotent Stem Cells - They can differentiate into any type of human body cell or the placenta.
Example: Fertilized egg cells.
Pluripotent Stem Cells are from totipotent cells and can differentiate into any cell in the human body; however, not many are in the placenta.
Example: Blastocyst cells.
Multipotent Stem Cells - They can only differentiate into closely related cells.
Example: Blood stem cell
Unipotent Stem Cells - They can only produce their type of cell.
Example: Skin stem cells (which can only become a new skin stem cell).
Explanation:
What percent of organic matter sink into deeper water where it may be removed effectively from the atmosphere?
The percentage of organic matter which sinks into deeper water is; 10%.
What is organic matter?The percentage of organic matter produced in the euphotic zone and which subsequently, sinks to deep waters is 10%.
This can be attributed to the fact that 90% of the organic matter produced in the euphotic zone is decomposed in the euphotic zone.
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The type of transcriptional control in operons in which a regulatory protein is an activator and stimulates transcription is called.
The type of transcriptional control in operons in which a regulatory protein is an activator and stimulates transcription is called positive control.
What controls the transcription of an operon?The regulatory DNA sequences are the important class of factors that controls the transcription of an operon.
The types of transcriptional control in operons in which a regulatory protein is an inhibitor and inhibits transcription are called negative control.
Therefore, the positive control and negative control of the transcription of an operon depend on the nature of regulatory proteins.
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How does the intracellular fluid compartment differ from the extracellular fluid compartment?.
Answer:
The main difference between intercellular and extracellular fluid is that intracellular fluid is the liquid found inside the cell whereas extracellular fluid refers to all the body fluids outside the cell.
reviewing Meiosis:
????
Answer:
Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each chromosome.
Explanation:
hope it will help you
(02.07 MC)
The table below shows population data for a particular country in 2010:
Population (millions) 40.5
Births (per 1,000)
30
Deaths (per 1,000) 3
Total Fertility Rate 3.3
Infant Mortality Rate
(per 1,000 births)
Which of the following would explain why the total fertility rate is 3.8 five years later?
2
O A governmental policy to ensure replacement-level fertility remains constant even though there is no change in death rate.
Females are being given fewer educational opportunities so there is a reluctance to have children.
Couples are able to settle down at younger ages and quality of life has improved in the nation.
O The birth rate is determined to be 28 births for every 1,000 individuals five years later.
Option D seems to provide the most information about the total fertility rate, which is 3.8 five years later.
Why does fertility decline over time?A variety of factors contribute to the decline in fertility rates. One of the factors is primarily due to job changes, reproductive health issues, and other factors.
Thus, the answer is option D is the mathematical option that best explains the total fertility rate of 3.8 five years later.
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When unfavorable growth conditions (for binary fission) are present, however, some bacteria form ____________.
The blank space in the task content should be filled with endospores.
What other reproduction form is exhibited by bacteria in unfavorable growth conditions?As an alternative reproduction form, during endospore formation, the bacterium divides within its cell wall, in which case, one part engulfs the other. Endospores are resistant to harsh growth conditions and are able to survuve these conditions and lie dormant for extended periods, even centuries.
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Name three industries in the North?
Soli reaction is ______
Answer:
soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units
reviewing Meiosis:
Diagram the phases of meiosis using colored pencils to show the homozygous pairs.
a. the starting cell is 2n. how many chromosomes does it have?
b. hom many chromosomes will it have after Meiosis 1?
c. how many chromosomes will it have after Meiosis 2?
a. the starting cell is 2n. how many chromosomes does it have?
30 chromosomesb. hom many chromosomes will it have after Meiosis 1?
23 chromosomesc. how many chromosomes will it have after Meiosis 2?
15 chromosomes.Groundwater Activity: Properties of Water Lab Report
Introduction
Water is an essential part of processes on Earth. In this lab, you will investigate the properties of water and explain how they affect Earth material and surface processes.
Investigative Phenomenon:
What are the connections between the properties of water and their effects on Earth materials and surface processes?
Materials:
• water
• stopwatch
• a clean penny
• food coloring
• vegetable oil
• clear plastic cups
• dropper or pipette
• ice cube
• black pepper
• a bowl
• dish soap
• sponge or cloth
• a heating source (sunlight, lamp, etc.) or a cooling source (refrigerator)
• one balloon
• measuring tape or string and a ruler
• thermometer
Activity One: Investigating Cohesion
Cohesion is the ability of molecules to bind together. One way to test this is by investigating how the droplets of a particular liquid stick together compared to other liquids. Use the materials you have to determine water’s relative cohesion on a particular surface.
Describe the plan you will follow to determine this:
Record your data and observations:
Phenomena Reflective Question: How does the cohesive property of water come into play with it interacts with Earth materials?
Activity Two: Investigating Surface Tension
Surface tension is a property of a liquid that allows the surface to resist force. This means the surface of a liquid resists the weight of objects.
Procedures:
1. Fill a bowl ¾ full with tap water.
2. Sprinkle about a teaspoon of ground black pepper in the bowl. DO NOT STIR! Observe what happens to the black pepper.
3. Gently place your finger into the water and observe what happens.
4. Put two drops of dish soap on your finger. Gently use your finger to touch the surface of the water and observe what happens.
Data and observations:
Observations
Black pepper in water
Touching water without soap
Touching water with soap
Phenomena Reflective Question: How does the surface tension of water allow for it to interact with Earth materials?
Activity Three: Investigating Solubility
A liquid is polar, which means a substance can easily dissolve in it. How can you test water’s polarity compared to other substances? To measure solubility, it is necessary to compare initial and final results using your visual observations.
Describe the plan you will follow to determine this:
Record your data and observations: Add food coloring to each liquid. Observe each reaction and record your observations in the table below.
Time Water Vegetable Oil
0 seconds
5 seconds
10 seconds
15 seconds
20 seconds
Phenomena Reflective Question: Explain why water is called a universal solvent. How does this polarity allow for water to interact with Earth materials?
Activity Four: Investigating Specific Heat Capacity
Specific heat is the amount of heat energy needed to change the temperature of 1 gram of the substance one degree Celsius. Some objects' specific heat allows them to heat up or cool down faster than others of equal mass. How can you compare water’s specific heat to other substances? How does the specific heat of water affect how other objects, such as a damp cloth, warm up or cool down? To measure specific heat, it is necessary to compare initial and final results.
Describe the plan you will follow to determine this:
Record your data and observations: Observe the temperature of the damp sponge/cloth after being placed under a heat source. Caution: do not set the damp sponge or cloth to close to the heat source. Record your observations.
Time Damp Sponge/Cloth
0 seconds
5 seconds
10 seconds
15 seconds
20 seconds
Phenomena Reflective Question: How does water’s specific heat capacity come into play when it interacts with Earth materials or affect surface processes?
Activity Five: Investigating Expansion and Density
Density of an object can be found by calculating mass divided by volume. If two objects have the same mass, but one has a greater volume, the object with more volume is less dense. Does water’s density change when it is frozen?
Describe the plan you will follow to determine this:
Record your data and observations:
Phenomenon Reflective Question: Did the density of water change when it changed from solid to liquid? How do you think the density of water has an effect on Earth materials and surface processes?
Evaluating the Design:
Part of an investigation is to evaluation how well your investigation gave you the data you needed. In this report, include the following:
1. an evaluation of the plan you made for the various activities and how the data was collected
2. a description of how well the data allowed you to infer the effect of water on materials and processes in the world
3. a description of how to further investigate the effects of water and collect more accurate and precise data
Answer:
Explanation:
Both Groundwater and surface water are largely replenished by rain water.
Which of the following describes a renewable of active solar energy?
A. Sustainable lack of a mission
B. Unlimited, clean energy source
C. Replenishable but not renewable
D. Needs energy grid for electricity
Answer:
C: replenishable but not renewable
Explanation:
What is the lock and key theory?
Lock and key theory states that enzymes have a specific shape that directly correlates to the shape of the substrate.
What is the lock and key theory of enzymes?Enzymes are globular protein that catalyses a biological chemical reaction.
One of the characteristics of enzymes is that they are usually substrate-specific i.e. They bind and act to a particular substrate.
This characteristics is explained by the lock and key theory of enzymes, which states that enzymes have a specific shape that directly correlates to the shape of the substrate.
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Describe the processes that occur after pollination, including fertilisation and seed formation.
Answer:
Step one: After pollen has landed on the stigma, it grows a pollen tube down through the style to the ovary. Step two: The nucleus of the pollen grain travels down the pollen tube and fertilises the nucleus in the ovule. Step three: The fertilised ovule develops into a seed.
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Ms. Gates has recently become dually eligible for medicare and medicaid. She is very concerned about how this will affect her prescription drug coverage. What should you tell her?.
If Ms. Gates is eligible for both the Medicare and the Medicaid, then her drugs will be covered under part D. So, she should be informed that Medicare will generally cover the drugs. But the ones that are not covered will be covered under Medicaid.
The Medicare and Medicaid program are federal and state government program for the people who have limited assets and are 65 or older.
These program provides healthcare coverage to the people. The Medicare program although covers most of the drugs, but some drugs are excluded from the Medicare, these drugs are mostly covered by Medicaid program.
So, the Ms. Gates should be informed that all her drugs will be covered under the Medicare and Medicaid privileges.
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The origins of the lateral head of the gastrocnemius muscle are the __________.
The origins of the lateral head of the gastrocnemius muscle are the lateral condyle and posterior surface of the femur.
What is a gastrocnemius muscle?A gastrocnemius muscle is also referred to as leg triceps and it can be defined as the largest, posterior, and most superficial muscle of the calf of the human leg, which enables the flexing of the knee and foot because it runs to the Achilles tendon from two lateral heads that are attached to the femur.
In this context, we can infer and logically deduce that the lateral condyle and posterior surface of the femur are the origins of the lateral head of the gastrocnemius muscle.
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Distinguish between conditioned and simple reflexes
Answer:
Simple reflex action is not really learned and is automatic and involuntary whereas conditioned reflex action is voluntary and has to be learned.
Explanation:
Which act prompted the developers to install stormwater management systems to handle the movement of polluted water? The_______prompted the developers to install stormwater management systems to handle the movement of polluted water.
US clean water act as a prompted the developers to install stormwater management systems to handle the movement of polluted water.
What is the role of us clean water act?The Clean Water Act (CWA) establishes the fundamental framework for controlling pollution discharges into American waters and setting quality criteria for surface waters.
In 1972, the US Clean Water Act was adopted. The Act's principal goal was to control and minimize the entry of pollutants into water bodies. This was done to make the water bodies cleaner, clearer, and more suitable for usage by the general public and the abundant life forms that were already present.
In order to handle the removal of contaminated water from the water bodies, the developers decided to install stormwater management systems.
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Without undergoing any changes itself, the _____ makes changes to the ______.
Without undergoing any changes itself, the enzyme makes changes to the substrate.
What is an enzyme?An enzyme is a biological catalyst that acts by lowering the activation energy in a chemical reaction.
In a chemical reaction, an enzyme binds to a substrate to convert it to one or more products.
In conclusion, without undergoing any changes itself, the enzyme makes changes to the substrate.
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