The oldest oceanic crust is found at the mid-ocean ridges. Thus, option "A" is correct.
How old is the youngest oceanic crust?The ocean crust is about younger than 200 million years (for example, smaller than 5% of the age of the earth).
The crust is most naive (still being created by volcanic eruptions) along the axis of the mid-ocean ridges and increases in age down the sides of the mid-ocean rises and out onto the more serious basin floors.
Thus, option "A" is correct.
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Cellulose is a starchy carbohydrate.
Which of these statements about
cellulose is TRUE?
A. Cellulose is rarely found on Earth.
B. Cellulose is a type of fat.
C. Cellulose is a complex carbohydrate.
D. Cellulose dissolves easily in water.
Answer:
the answer is d
Explanation:
because as the first statement tell you it is a carbohydrate so B is eliminated .
and we know that it is found in plants so A is eliminated too.
and it makes cell wall and can not easily dissolve in water and d is eliminated so definitely the answer is C
The true statement about cellulose is a complex carbohydrate. The correct option is C.
What is cellulose?Cellulose is a glucose-based linear polymer (polysaccharide) that is found in nature. Its chemical formula is (C6H10O5)X. Plants typically produce it through synthesis.
The primary characteristics of this polysaccharide are biodegradability and hydrolysis resistance. The sturdy formation of plant cell walls is greatly aided by cellulose, a hard, fibrous, and water-insoluble polysaccharide. 20.
The fibrils (bundles of microfibrils) and microfibrils (bundles of polysaccharides) made up of cellulose chains make up the plant cell wall. It is colorless and tasteless.
Therefore, the correct option is C. Cellulose is a complex carbohydrate.
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Name three industries in the North?
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 phrase used by the president was specifically chosen to convince the public to support the war?
“facts of yesterday”
“unprovoked and dastardly attack”
“have already formed their opinions”
“a state of war has existed”
The phrase used by the president was specifically chosen to convince the public to support the war is “unprovoked and dastardly attack”. Thus, option "B" is correct.
How, support your answer?President Roosevelt was in office when Pearl Harbor happened, and it was the perfect occasion that the government of the United States needed to enter a war that was clearly being won by the Germans and Japanese, they had already taken decisions prior to this to help the allies, but they couldn´t directly send troops when the bombings on Pearl Harbor took place, and since the USA had never provoked, attacked or done anything to upset Japan, they were now able to declare war on Japan an its allies.
Thus, option "B" is correct.
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Answer:
B
Explanation:
Did the assignment
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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Fossil fuels represent Group of answer choices a large amount of paleozoic and mesozoic biomass buried anaerobically millions of years ago. natural deposits of organic materials that formed long before life on Earth evolved. the remains of fossil animals that lived a few thousand years ago. sustainable sources of energy that are underused today.
Fossil fuels represent the remains of fossil animals that lived a few thousand years ago.
How fossil fuel are formed?Fossil fuels are formed from decomposition of plants and animals dead bodies. These fuels are found in the Earth's crust. It contain carbon and hydrogen, which can be burned for energy.
So we can conclude that Fossil fuels represent the remains of fossil animals that lived a few thousand years ago.
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Soli reaction is ______
Answer:
soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units
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 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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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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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.
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:
Explain how activation energy is related to exothermic and endothermic reactions.
Activation energy is related to exothermic and endothermic reactions because in exothermic reaction activation energy is lower than in endothermic reactions.
What is an activation energy?Activation energy is defined as the energy that must be overcome for a chemical reaction to take place.
A chemical reaction can either be exothermic or endothermic reactions.
This activation energy is related to exothermic reaction because there is net energy release from the reaction while in the endothermic reaction there is net absorption to energy.
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Which of the following form(s) zygote (2n)?
Sperm + Ovum
n + n
Male gamete + Female gamete
All of the choices
Answer:
All of the choices
Explanation:
The n stands for 23 chromosomes, every cell has 46 chromosomes so 2n.
Male and female gametes have just n (23 chromosomes)
n + n = 2n
sperm and ovum are synonyms for the gametes
Chromosomes contain different amounts of:
Answer:
DNA srry if im wrong
Explanation:
Answer:
DNA
Explanation:
A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.
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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How does Hydrosphere affect atmosphere during Australia bushfire?
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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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:
heyy
please help me with these answers
theyre quite simple but i dont really know how to explain the answers
1. Tulips are pollinated by insects. explain three ways the flower is adapted for this type of pollination
2. explain the differences in the types of pollen produced by insect-pollinated amd wind-pollinated plants.
thankss
1. Bees, flies, wasps, butterflies, and moths are significant insect pollinators. Moths are drawn to white flowers that are open at night, but bees and butterflies are drawn to brilliantly colored blooms with powerful scents that are open during the day.
What is pollination?The act of moving pollen grains from an anther to a flower's stigma is called pollination. Flowers that are pollinated by insects typically generate a sweet nectar that the insects visit to consume. If a flower is self-pollinating, fertilization occurs when pollen stock from an insect contacts the stigma of the bloom. If the bug is bisexual, it will fly to another bloom and disperse the pollen.
2. Most flowers advertise themselves by being brightly colored and perched on long stems so they wave in the air and are closer to where insects are flying, as opposed to on the ground, where they would otherwise be. A flower's petal sizes and shapes, in addition to color, can draw insects.
3. Flowers draw insects because of their aroma or vibrantly colored petals. Nectar is a delicious liquid that many flowers generate that is consumed by insects. The female part of the flower is the carpel.
Answer 2. Flowers that are pollinated by insects have characteristics that enable insects, birds, or other animals to pollinate them while consuming the nectar. When an insect brushes by the stigma of a flower, whether it is the same bloom or another, pollen grains will adhere to the insect's outer layer and stick to the flower's stigma, pollinating the flower. When the two seˣ cells combine, fertilization occurs, the ovule develops into a seed, and the ovary becomes a fruit. The pollen grain then grows a pollen tube down the style to reach the ovary, which contains the ovules.
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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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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:
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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Schools are looking for a balanced food option to serve their students.
they are looking for a food that has some carbohydrates, proteins, and lipids.
1. identify a food on the list that has some of each of the macromolecules.
2. explain how you know that the food has the macromolecules.
hint:
start your exploration with a food that is common in schools!
Schools have to give proper meals and carbohydrates to students.
What is a balanced diet?A balanced diet is one that includes a variety of foods in the right amounts and ratios to meet the body's needs for calories, proteins, minerals, vitamins, and other nutrients. A small portion of the diet is also set aside for extra nutrients to last through the brief period of leanness. In this situation, we must choose a unique menu that offers the
In this context, we have to first prepare the list of the number of carbohydrates, lipids, and proteins and then we have to identify the maximum amount required in the meal. then observe the common food in the school.
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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.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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Which of the following are true of a species? Select all that apply.
1 of 4 QUESTIONS
All fertile individuals can breed with one another.
Individuals vary genetically.
There is no natural selection occurring.
There is gene flow between populations.
Answer:
the 1rst and 2nd
Explanation:
all fertile individuals can breed with one another and individuals vary genetically
which of the following was a social cost associated with the devolpment of the internal combustion engine used in most cars?
Option:
A. People were able to use their horses for new tasks.
B. New jobs were created.
C. Blacksmiths needed to gain new skills to continue working.
D. Families were able to travel farther more easily.
Answer:
Blacksmiths needed to gain new skills to continue working. Thus, the correct option is C.
What engineer Nikolaus August Otto developed?Engineer Nikolaus August Otto developed the first four-stroke internal combustion engine and established the Otto cycle, a well-known theoretical cycle that governs the operation of explosive engines.
Otto's engine outperformed the steam engine in use at the time in a number of ways. One of them is their light weight, as steam engines need large water reservoirs and fuel to burn in order to heat the water, which in this case would be charcoal or firewood. In addition to being light, the internal combustion engine consumed little fuel, even benzene. Another factor was Otto cycle internal combustion engines' power, which also outperformed steam engines in terms of size ratio.
These benefits put pressure on the automotive sector to build vehicles with this kind of technology. Blacksmiths were compelled to learn new skills in order to use this new technology.
In addition to being light, the internal combustion engine consumed little fuel, even benzene. Another reason was Otto cycle internal combustion engines' power, which also outperformed steam engines in terms of size ratio.
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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.
