Question 1
This is a fascinating topic. Tectonic plates can be thought of something that is an enlarged form of a kitchen plate. When two of these huge plates meet, one forces another to go lower into the earth's mantle (a below surface geologic location made of rocks and molten (soupy or liquid) rocks.
This process of one plate forcing another to go lower is called subduction. The rocks grind away on each other. They are subjected to 6 different forces, the most common of which are friction, compression and folding. Add heat and you get metamorphic rock. It's like a kitchen recipe but on a much bigger scale. That's the cook's tour of Metamorphic rock.
Question 2
Mechanical weathering is a process similar to what is written above. If the sea pounds against the shore, eventually the rock will break down. Where I live, if water gets into a rock's cracks, when it freezes and the ice expands it will eventually break the rock apart. In short, big rocks become little pebbles.
Chemical weathering: water and minerals combine to react with the minerals contained in rocks. I'm not well versed in this area, so I'm not sure I could give you a good example other than this one. One of the biproducts of refining oil is sulfur dioxide, especially with Alberta oil which is very "heavy" and tar like. This combines with water to produce H2SO3 which is not an extremely strong acid, but it is still an acid. It can react with the minerals in a rock and you have the break down of a rock.
Water is ___ transported into and out of the vacuoles in the guard cells.
Water is H2o
Covalent compound (O,H are nonmetals)
Valence of O (O must form an octet): 6
Valence of H: 1
Total valence electrons: 8
Molar mass: 18.02 g/mol
hope this helps good luck
How would an asthma attack most likely affect oxygen delivery in the body?
Answer: Asthma is a chronic inflammatory disease of airways(nasal cavity,trachea , bronchiole). The disease manifests as recurrent attacks of wheezing, coughing and shortness of breath. The muscles surrounding the airways restricts the passage and there is a limiting amount of air supply to the body causing a choking sensation.As there is a natural defence mechanism in our body asthma induce the secretion of sputum and mucus, that leads to constrict the airways , making the asthma attack worse.
As a result of loss of oxygen there is a condition called hypoxia and because of this there could be some serious issues related to the body depending upon the time interval of asthma .These can be
Confusion Cough Fast heart rate Rapid breathing Shortness of breath Slow heart rate Sweating Wheezing Samantha hypothesized that tomatoes grow best at 25°C. To test her hypothesis, she designed ten different growth chambers that were each controlled for a specific temperature. Then, she placed ten tomato plants in each chamber and recorded the number of tomatoes produced after 2 months. She graphed the average number of tomatoes grown per plant for each temperature. What can the student conclude about her hypothesis based on the results? A. The results disprove her hypothesis. B. The results support and prove her hypothesis. C. The results do not support her hypothesis but do not disprove it. D. The results only support her hypothesis.
D.The results only support her hypothesis
is there any other info?
The correct answer is D. The results only support her hypothesis. I just answered this question on study island and this is the correct answer.
Why is the human cardiovascular system considered closed?
Answer:
There are no holes for blood to enter or leave the system
+50 pts How can you tell that algae filaments are composed of several cells rather than just one?
Non-scientific method:
Well, an easy way is observing the filament under a microscope: if it contains one cell it's unicellular and if it contains more than one cell it's multicellular.
Scientific method:
Filamentous algae are, in principle, single-celled. But, sometimes they can form colonies and evolve to be multicellular. But still, if they just form a colony they'll still be unicellular until they start changing.
Answer:
Unicellular.
Hope it helped,
BioTeacher101
In the open ocean, _____ are the main producers.
phytoplankton
zooplankton
ocean plants
symbiotic algae
I believe its Phytoplankton.
Answer:
-Phytoplankton.
Explanation:
Producers in an ecosystem are autotrophic organisms that can synthesize food by their own. Phytoplanktons are autotrophic, microscopic marine organisms, considered as the main producers in the ocean ecosystem.
They include photosynthetic algae and bacteria, which use sunlight as source of energy and convert it into chemical energy (as food) for consumers.
Thus, the correct answer is option). phytoplankton.'
4. What most likely caused the rabbit population to decrease over the first time unit shown in the following graph?
A. A disease in the population of rabbits.
B. A decreasing population of grasses.
C. An increasing population of hawks.
D. A higher than normal population of snakes.
The correct answer is option D
The population of rabbit over the first unit of time is reduced because the population of snakes was more than the normal population.
The predators of rabbits are snakes and if the population of predator will be more than the population of the rabbit then snakes will eat them. Ultimately the population of rabbit will be decreased.
Then after some time the population of rabbit increased as the population of snakes decreased.
The rabbit population to decrease because A higher than normal population of snakes. Option D
Why did the population decrease?Due to the fact that there were more snakes than usual during the first unit of time, the rabbit population decreased.
Snakes are the rabbits' main predators, and if there are more snakes than there are rabbits, the snakes will consume the rabbits. The rabbit population will eventually decline. Following that, as the population of snakes declined, the population of rabbit rose.
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Choose all the answers that apply.
The hypothalamus _____.
A. is part of the pituitary gland
B. regulates temperature and metabolism
C. is the control center for the endocrine system
D. links the endocrine and nervous systems
E. controls homeostatic responses
Answer:A,B,D,E
Explanation:
The hypothalamus is part of the pituitary gland, regulates temperature and metabolism, links the endocrine and nervous systems and controls homeostatic responses. Thus, the correct option is B.
What is pituitary gland?Pituitary gland is defined as a small, pea sized endocrine gland located at the base of brain below hypothalamus.
It releases several important hormones and controls the function of many other endocrine system glands.
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This chart shows a portion of a dichotomous key.dichotomous keywhich relationship can be determined from this dichotomous key?organism x and organism z have at least one observable trait in common.organism y has at least one observable trait in common with organisms x or z.organism x is in a different phylum than organism y.organism z is genetically closer to organism x than to organism y.
You must turn off the engine to stop CNG flow. A) True B) False
A) True
Explanation:To avoid these hazards, technicians must turn off the engine to stop CNG flow – especially before working on the vehicle. Most CNG vehicles have several ways of turning off the engine, so check the manufacturer's specific directions. Automatic release valve - installed on newer CNG systems.
Answer: True
Explanation:
CNG vehicles present potential hazards which include:
• Ignition sources as the ignition temperature is twice as high as gasoline.
• Contact with fuel
• Asphyxiation
• High-pressure CNG line
To avoid any of these hazards, you must turn off the engine to stop CNG flow and there are many ways by which you can turn it off.
high-intensity bundle of energy being emitted from some decaying nuclei beta particle 2. particle radiating from the nucleus of some atoms alpha particle 3. negative particle identical to an electron but radiating from a decaying nucleus gamma ray
Alpha particles, beta particles, and gamma rays are the three most general kinds of radiation discharged by radioactive or unstable isotopes. Gamma rays refer to the high-intensity bundle of energy being emitted from certain decaying nuclei.
Beta particles refer to the negative particle similar to an electron but radiating from a decaying nucleus.
Alpha particles refer to the particles radiating from the nucleus of certain atoms similar to a nucleus of a helium.
Which feature is not used to classify a virus?
Question 4 options:
genetic material
size
shape of the capsid
shape of its nucleus
Answer:
shape of nucleus
Explanation:
usa test prep
After a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving. True or false?
Final answer:
The statement is false; dye molecules continue to move randomly even after diffusing evenly throughout the water due to constant kinetic energy.
Explanation:
The statement that 'after a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving' is false. Diffusion is the process by which molecules move from an area of high concentration to an area of lower concentration. When you place a drop of dye into water, it will diffuse until there is an even distribution throughout the water. This state is known as equilibrium, where there is no net movement of dye molecules, but the individual dye molecules continue to move randomly. It's important to note that molecular motion is constant due to kinetic energy, so even when the dye has spread out evenly, the molecules are still in motion.
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the ____.
Synapses are known as the junction between the two adjoining neurons. The nerve impulses are passed through this gap with the help of the neurotransmitters. In a synapse, the axon of one neuron is present in proximity with the receptor of another neuron. The synapse between the two adjacent neurons helps them to communicate with each other.
Hence, the blank can be filled with 'synapse'.
The correct answer is B. A synapse is the junction between neurons or between a neuron and another cell type. It functions to transmit signals and involves complex interactions of neurotransmitters aiding in cellular communication.
The correct term for the junction between adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is the synapse. Let's break down why this option is correct:
Definition: A synapse is the point where the axon terminal of one neuron comes near the dendrite or cell body of another neuron, or even a muscle cell (neuromuscular junction).Function: It facilitates the transmission of electrical or chemical signals between neurons or between a neuron and another cell type.Mechanism: When an action potential reaches the axon terminals, it causes the release of neurotransmitters from synaptic vesicles into the synaptic cleft.Types of Synapses: There are two types of synapses: chemical and electrical. Most common are chemical synapses where neurotransmitters are released to carry the signal across the synaptic cleft.Complexity: The structure and function of a synapse ensure precise communication between cells, a critical aspect of neural functioning.Thus, Option B, a synapse, is the correct answer.
Complete question:
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the?
A. Junction point
B. A synapse
C. A joint
D. Constant bridge
A landfill which a plastic or clay liner that prevents the leaking of waste into soil and groundwater is called?
a) a sanitary landfill
B) an unsanitary landfill
C) a recycling center
D) a toxic waste site
How are streams and rivers in drainage basins affected by converting prairie land to farm land?
The streams and rivers in the drainage basins were the prairies are converted into farm land are mostly affected by the agriculture and its needs, as well as its consequences.
The agriculture demands water for irrigation, and most of this water comes from the streams and rivers, so that contributes to lowering of the water levels of the streams and rivers.
The agriculture also causes damage to the streams and rivers by polluting them. Namely, the pesticides, herbicides, and fungicides that are used for protection of the plants, partially end up in the low groundwater's, and in general, these waters are connected to the streams and rivers, so the pollutants end up in them, and that affects the biodiversity in them very badly.
Answer:
it d
Explanation:
What determines how much energy a human can receive from food?
A) How much nitrogen the food contains
B) How much the food molecules weigh
C) How much energy the food molecules have
D) How much oxygen the food contains
How much energy the food molecules have is the correct answer.
The presence of molecules determines amount of energy a human can receive from food. Food molecules have macromolecules such as carbohydrate, protein and fat which release energy when broken down into simpler molecules with the help of enzymes. The food we eat has these macromolecules which is used as a fuel for running the body so we can conclude that food molecules have energy.
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What do you think would happen if you added a large volume of fresh water to the roots of the plant? answer in terms of osmosis and salt and water concentration. Would water move into the plant, out of the plant, or stay where it is? explain why.
How do somatic and inherited mutations differ?
A. Somatic mutations exist in all cells in the body and inherited mutations only exist in the cell type that mutated.
B. Somatic mutations only affect males and inherited mutations affect any gender.
C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
D. Inherited mutations only affect males and somatic mutations affect any gender.
The right option is; C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
Inherited mutations are gene mutations that exist in almost every cell in the body throughout an individual’s life. Inherited mutations are inherited from a parent and can also be transmitted. They are also called germline mutations because they exist in the parent’s egg or sperm cells (gametes).
Somatic mutations are gene mutations that exist in only certain cell types that are mutated, not in every cell in the body and it take place at some time during an individual’s life. Somatic mutations are not inherited and cannot be passed. They are caused due to environmental factors (such as cigarette smoke or ultraviolet (UV) radiation) or due to error during DNA replication.
Answer:
A for plato
Explanation:
How can you tell from a dot diagram how many covalent bonds can be formed in an element?
A: By the number of protons in the dot diagram
B: By the number of valence electrons in the dot diagram
C: By the number of neutrons in the dot diagram
D: You can not tell the number of covalent bonds from a dot diagram.
the answer is B by the number of valence electrons.
What does the D in DNA Stand for?
A. The name of the base that makes it up
B. The kind of macromolecule it is
C. The name of the sugar that makes it up
D. The number of strands that form it
The answer is (C) as the name of sugar that makes it up.
ExplanationDNA stands for Deoxyribose Nucleic Acid. Deoxyribose is a five carbon (pentose) sugar. Name deoxy is given to it because of containing one oxygen less than ribose. It's formed by replacing the hydroxyl group (OH) with hydrogen (H) at carbon number 2. In DNA structure Deoxyribose molecule is attached to the next phosphate molecule with the help of phosphodiester bonds.
DNA stands for Deoxyribose Nucleic Acid. Deoxyribose is a five carbon (pentose) sugar. Name deoxy is given to it because of containing one oxygen less than ribose. Thus, the correct option is C.
DNA is formed by replacing the hydroxyl group (OH) with hydrogen (H) at carbon number 2. In DNA structure Deoxyribose molecule is attached to the next phosphate molecule with the help of phosphodiester bonds.
DNA is a hereditary material which is present in human beings as well as all other living organisms. Every cell which is present in an organism's body has DNA which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.
Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.Thus, the correct option is C.
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From the Bohr Model diagram, assuming the atom is neutral, what element is represented by the diagram?
diagram for hydrogen
Answer:
Hydrogen
Explanation:
Bohr Model: In this model negatively charged electrons orbits a positively charged nucleus like the planets orbiting around the sun. Coulomb force between the negatively charged electrons and positively charged nucleus is mathematically akin to the gravitational force of the solar system. Important points are-
The electrons orbit the nucleus in the orbits that have a set energy and size. Orbital energy is related to its size, highest energy is found in the largest orbit.The radiation is emitted or absorbed during the movement of electrons from one orbit to the other.Bohr Model of Hydrogen :
The example of hydrogen atom is simplest in case of Bohr model or for a hydrogen-like ion in which the electrons which is negatively charged orbits around a positively charged nucleus. Only certain electron orbits are allowed and radius of the orbit increases square of n, where n is the principal quantum number. The first line of Balmer series is produced in the 3 to 2 transition. For hydrogen, z=1, this produces a photon of wavelength 656 nanometer.
1. Any molecule that contains carbon to hydrogen bonding is known as a
A) water
B) inorganic molecule
C) organic molecule
2. How many valance electrons are generally needed to fill the outer shell of most atoms?
A) 4
B) 6
C) 8
3. The macromolecules in biochemistry are proteins, carbohydrates, lipids and nucleic acids. What main elements do all of them have in common?
A) carbon and sulfur
B) carbon and hydrogen
C) oxygen and nitrogen
D) oxygen and phosphorus
1.) C) organic molecule
2). B) 6
3) B) carbon and hydrogen
Organic molecules are compounds containing carbon-hydrogen bonds; most atoms require 8 valance electrons to complete their outer shells; proteins, carbohydrates, lipids, and nucleic acids all contain elements of carbon and hydrogen.
Explanation:1. Any molecule that contains carbon to hydrogen bonding is known as a C) organic molecule. Organic molecules are those which contain carbon atoms covalently bonded to hydrogen atoms. Examples of organic molecules include methane (CH4), glucose (C6H12O6), and many more.
2. The number of valance electrons generally needed to fill the outer shell of most atoms is C) 8. This principle is known as the octet rule, and it is based on the observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
3. The main elements that all of the macromolecules in biochemistry (proteins, carbohydrates, lipids and nucleic acids) have in common are B) carbon and hydrogen. All these macromolecules are made up of these two elements along with others specific to each type of molecule. For example, proteins also contain nitrogen, oxygen and sometimes sulfur; carbohydrates and lipids additionally contain oxygen; and nucleic acids also contain nitrogen, oxygen, and phosphorus.
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True or false? resource use per person is higher in the united states than it is in middle-income countries like china.
Describe Henrietta Leavitt's discovery, and explain why it was so important in the society in which she lived.
Henrietta Swan Leavitt discovered cepheids in 1908 during the investigation of different stars in the clouds. She published it by working more on it in 1912 and died in December 1921. This discovery was so important in the society in which she lived because the cosmologist of America was known for this discovery of Cepheids which is a relationship between period, luminosity and quivering stars which changes in light.
HELP ME PLEASE!!!!!
If the dominant allele is represented by A and the recessive allele is represented by a what would be a possible genotype and phenotype of individual II.3
The correct answer is option B. Genotype AA, phenotype-Unaffected.
The cystic fibrosis is a condition caused by the inheritance of the two recessive allele, It is an autosomal recessive disease.
In the given case, the parents are carriers, and the carriers are always heterozygotes. Hence, the phenotype of the both parent should be Aa. A possible cross of the parents is shown in the figure below.
In case, the progeny have a single dominant trait, the child would not be affected, but will be a carrier and can pass the disease to offspring. In case, the child inherit both the dominant allele (homozygous dominant) from the parents, then he/she would be unaffected. In case, the phenotype of the child is homozygous recessive then it would be affected.
The possible genotype and phenotype of individual is Genotype AA, phenotype-Unaffected. Hence the correct option is b.
The cystic fibrosis is a condition caused by the inheritance of the two recessive allele, It is an autosomal recessive disease.
In the given case, the parents are carriers, and the carriers are always heterozygotes. Hence, the phenotype of the both parent should be Aa. A possible cross of the parents is shown in the figure below.
In case, the progeny have a single dominant trait, the child would not be affected, but will be a carrier and can pass the disease to offspring. In case, the child inherit both the dominant allele (homozygous dominant) from the parents, then he/she would be unaffected. In case, the phenotype of the child is homozygous recessive then it would be affected. Hence the correct option is b.
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Which of the following is a TRUE statement?
A) Fats contain half the amount of energy than carbohydrates because they have less bonds.
B) Carbohydrates contain more energy than lipids because their bonds release more energy when broken.
C) Lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds to release energy when broken.
Answer: Option C
Explanation:
The energy that is required by the body is primarily stored in the form carbohydrates. The energy from the carbohydrates is easily converted into a usable form which is adenosine triphosphate.
The energy from the carbohydrates can be derived easily but from lipids it is difficult. Lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds and when these bonds are broken down they release energy.
This energy is much more than carbohydrates. Hence, the maximum energy in the molecules is in lipids.
The distance between Neptune and the Sun is 30.06 AU. What is this distance in millions of kilometers? (One AU is about 150 million kilometers.)
A.
450 million kilometers
B.
450.9 million kilometers
C.
4,000 million kilometers
D.
4,509 million kilometers
Answer:
4,509 million kilometers
Explanation:
Which phrases describe organisms that formed index fossils? Check all that apply.
are extinct
had hard parts
were generally large
were alive only for a short time
lived in a narrow geographic area
are extinct
were alive only for a short time
lived in a narrow geographic area
had hard parts
Answer:
Options (1), (2), and (4)
Explanation:
Index fossils are usually defined as those fossils that were present on earth for a very short period of time. They were very broadly distributed in almost all parts of the world. They were comparatively smaller in size and comprised of hard parts that were preserved under favorable conditions which are found at many places in the present. These are extinct species. For example, trilobites and ammonites.
These index fossils are very useful because it helps in determining the age of the fossils as well as rocks by applying the radioactive dating method.
thus, the correct answers are options (1), (2), and (4).
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A ______ is a prediction based on data and information you researched.
The answer is a hypothesis.
A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.