The age of crustal rocks can be determined by the help of plate tectonics as the oldest rocks move away and deeper into the ridge.
How to determine age of crustal rocks?
Crustal rocks or Continental crust is the layer of igneous, sedimentary, and metamorphic rocks which are formed by the geological continents and the areas of shallow seabed that are close to their shores which is known as continental shelves.
The surface of continental crust mainly lies above the sea level, its existence allowed the land life to evolve from the marine life. Its existence can also provide broad expanses of shallow water known as epeiric seas and the continental shelves where complex metazoan life could become established during the early Paleozoic period, which is now called as the Cambrian explosion.
By using the magnetic polarity of the sea floor the age of crust rocks can be determined. Very little of the sea floor is older than 150 million years. This is because the oldest sea floor is subducted under other plates and replaces by new surfaces. Thus, the plate tectonics can help in determining the age of crustal rocks.
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When magnesium reacts with hydrochloric acid the following result occurs.
A. A solid is formed.
B. There is a color change.
temperature change
C. There is a
D. Energy is taken in.
Please help what would this be?
Answer: 97% water
Explanation:
97+3=100
Yellow pods are dominant to green pods in peas.What is the probability that the second generation of plants will have yellow
pods, if the parental generation is homozygous dominant and homozygous recessive for the pod trait? (hint - need to use two
Punnett squares.)
a. 0%
O b. 25%
O c. 50%
O d. 75%
Answer:
I believe the answer is 25% is one of the parent pods is dominant and the other parent pod is recessive, feel free to correct me if i'm wrong.
Hope this helps!
Explanation:
What accounted for the
differences in the tortoise
shells among the islands of
the Galapagos?
A. the amount of available vegetation on the
island this
B. the amount of rainfall the island received
C. the number of predators on the island
The amount of available vegetation on the island accounted for the differences in the tortoise shells among the islands of the Galapagos (Option A).
What is an evolutionary adaptive feature?An evolutionary adaptive feature can be defined as any feature (in this case the shells in tortoises) which are due to certain environmental conditions that lead to the reproductive success of the individual having the feature in the population.
Therefore, with this data, we can see that evolutionary adaptive features are able to enhance the survival of organisms and they are associated with certain conditions.
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Please is correct ?
Answer:
The answer is air
How can hurricanes hold water
Answer:
Hurricanes are made of water vapor.
Explanation:
27. A student constructs a model to show the structural organization in humans, as shown.
Which statement explains how each level of the organization is created?
A. Two or more types of muscle tissues working together make an organ.
B. Two or more types of organs working together make a cell.
C. Two or more types of organ systems working together make a tissue.
D. Two or more types of muscle tissues working together make a cell.
Drag the labels to identify the components of whole blood after centrifugation.
The dragging of labels in order to identify the components of whole blood after centrifugation is as follows:
Top layer: Plasma.Middle layer: Buffy coat, Platelets, Leukocytes. Bottom layer: Erythrocytes and Hematocrit. What is Centrifugation?Centrifugation may be defined as a type of biotechnique that significantly involves the utilization of centrifugal force in order to separate particles from a solution according to their size, shape, density, medium viscosity, and rotor speed.
According to the context of this question, the upper layer is the least dense which consists of about 55% of the total blood. While the bottom layer is the most dense component which consists of about 45% of the total blood.
Therefore, the dragging of labels in order to identify the components of whole blood after centrifugation is well described above.
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anyone know of any free anatomy classes i can take or free onlive live classes for all categories
Answer:
Answer below
Explanation:
Many states offer free virtual programs that allow you to co-enroll and access advanced courses for free. Check with your local virtual programs to see which ones you can qualify for.
If you are unable to attend virtual programs, then you can likely find a online service (it will not be live most the time) that can teach you. Channels like CrashCourse are good, but I believe Khan Academy also provides videos, articles, and practice tests on anatomy.
I hope this helps, anatomy and physiology is a very useful and interesting course to take. Good on you for having the initiative =)
Scientific Method
Define the following:
a. Indegendent Variable:
b. Dependent Variable:
c. Control Variable:
d. Controlled experiment
e. Hypothesis:
1. You have measured the rate at which a fish breaths at various temperatures by courting the rate at which its gills open. The data table is shown below. Create a line graph depicting the results
a. What is the independent variabie? why
b. The dependent variable? Explain whiy.
c. What happens to breathing rate with increase in temperature?
d. Identity at least 3 control variabios in this experiment.
e. What do you think would happen if you raised the temperature even more? Why would it be a bad ides to do this?
Biochemistry
2. Fill in chart below.
When conducting an experiment, the researcher needs to define the involved variables to state a proper hypothesis. 1a) Ind Var Influences the dep. var. and the results. 1b) Dep Var is affected by the indep. one. 1c) Cont Var remain constant. 1d) Cont Exper. Controlled and changed by the researcher. 1e) Hypothesis claim and prediction about the relationship between variables and the experiment results. 2a) Ind Var: Temperature. 2b) Dep Var: Breathing rate. 2c) the increas ein temeprature causes and increase in breathin rate. 2d) Cont var: water pH, food, species. 3) Carbohydrate: C,O,H. Monosaccharidae. Source of energy. Glucose / Lipids: C,O,H. Fatty acids. Structure and energy. Phospholipids.
What are variables and hypothesis?When conducting an experiment, the researcher needs to define the variables involved in that experiment. These are the followings,
1A) Independent variables are the ones that affect the results by influencing the response of the dependent variable. The researcher changes the state or values of the independent variable to observe how these changes affect the dependent one. 1B) Dependent variables are the ones affected by the independent ones. So any change that might occur in the independent variable means or leads to a change in the dependent one. This change might be directly or inversely proportional to the change in the manipulated variable. 1C) Controlled variables are also known as constant variables. These are all the remaining variables that are involved in the experiment, but the researcher is not interested in these ones or in their effects. So, to avoid their influence on the results, they must be kept constant in the control and experimental groups.In this type of experiment, we can talk about a controlled experiment (1D) because the researcher is not just observing, but also controls all the variables to analyze the interaction between the ones of interest.
Once the variables are identified, the researcher can make the hypothesis.
A hypothesis (1E) is a scientific conjecture that requires corroboration. It is a claim of how it works the relationship between two or more variables (the dependent and the independent ones).The researcher hypothesizes to predict what is going on or what is expected to occur.In the exposed experiment about fish breaths we can see how temperature affects the breathing rate. As temperature increases, the breathing rate increases as well.
2A) Independen variable: Temperature. The researcher increases temperature and observes the rate at which its gills open. So the researcher records how the breathing rate responds to changes in temperature.
2B) Dependen variable: Breathing rate. It is affected by temperature. Its change is directly proportional to temperature changes.
2C) The increase in temperature causes an increase in the breathing rate.
2D) Controlled variables might be, for instance,
food availabilitywater pHoxygen concentrationfish speciesfish developmental stage2E) If temperature increases even more, the brething rate will keep increasing. However, fishes are very sensitive to temperature changes, so eventually they would be so affected that their breathing rate would decrease.
3)
Carbohydrates: Carbohydrates are polymeric molecules essential for life as they are the main source of energy necessary for organisms.
Contains: C, O, HMade up of: Monomers - Monosaccharidaes (CH₂O)ₙFunction: source of energyExample: GlucoseLipids: Lipids are composed of fatty acids and other components that vary among lipids.
Contains: C, O, HMade up of: Monomers - Fatty acidsFunction: membrane structure, energy provision, and signalingExample: PhospholipidYou can learn more about variables and hypothesis at
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24. A student observes two different types of cells (P and Q) under a microscope and records observations about the cell structures in a table.
Based on the observations, how can the student classify Cells P and Q?
A. Cell P is a bacterial cell, and Cell Q is a protist.
B. Cell P is a protist, and Cell Q is a bacterial cell.
C. Cell P is a bacterial cell, and Cell Q is a plant cell.
D. Cell P is a plant cell, and Cell Q is a bacterial cell.
D, cell p is definitely a plant cell
The genetic material is located in which part of the cell
Answer:
The Cell Nucleus
Explanation:
Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or (mtDNA). Mitochondria are structures within cells that convert the energy from food into a form that cells can use.
The cell's genetic material is contained in the nucleus.
Cells, frequently referred to as the "building blocks of life," make up all living organisms, ranging in number from the single cell of bacteria to the trillions in humans.
Each of these cells is a distinct entity enclosed in a cell membrane and containing a viscous liquid substance known as cytoplasm.
The majority of the DNA in human cells is located in a region of the cell called the nucleus. It's referred to as nuclear DNA.
DNA's primary role in a cell is to store the genetic data necessary for an organism to grow, function, and reproduce. Each creature is unique because of the information that is stored in its DNA and can be handed down from one generation to the next.
Therefore, the nucleus of the cell contains genetic material.
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16. The motion of atoms is affected by temperature. The pictures show water at three different temperatures.
Which order of the pictures indicates decreasing motion of atoms?
A. 1, 2, 3
B. 2, 3, 1
C. 3, 2, 1
D. 1, 3, 2
The order of pictures that indicates the decreasing motion of atoms is 2, 3, 1. Thus, the correct option for this question is B.
What is the effect of the motion of atoms on temperature?The temperature plays a direct role in the movement of atoms. If the atoms or molecules of a substance are moving faster, the substance has a higher temperature. If its atoms or molecules are moving slower, then it has a lower temperature.
Among the picture given, image 2 has a higher temperature thus it shows a higher movement of atoms. While, image 1 has a low temperature as it is ice, thus, it shows a lower movement of atoms.
Therefore, the order of pictures that indicates the decreasing motion of atoms is 2, 3, 1. Thus, the correct option for this question is B.
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Answer:
132
Explanation:
D
Which statement is true about DNA?
OA. It contains a small number of proteins.
OB. It makes proteins line up in a certain order.
C. It produces all the differences among living
D. It packages all the genes in a living thing.HeLP asap please
DNA is a polymer composed of several nucleotides. Genes are the inheritable subunits that carry genetic information and are composed of a varying number of nucleotides. D) It packages all the genes in a living thing.
What is DNA?
DNA is the deoxyribonucleic acid. It carries all the genetic information needed for the organism to accomplish its functions.
This polymer is composed of several monomers known as nucleotides, which joined by their extremes compose the DNA linear molecule.
Genes are DNA fragments that transmit the information needed to specify traits and are inheritable. These fragments are transmitted as units from generation to generation.
Genes are located in the DNA molecule and are composed of varying numbers of nucleotides.
During the cell cycle, when DNA is lax, it is called chromatin. But when cell division occurs and DNA condensates it forms the chromosomes.
DNA is intimately associated with two types of proteins:
histones, which are structural proteins, and non-histone proteins, which mediate different functions of DNA.According to this framework, Option D is correct. It packages all the genes in a living thing.
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Answer:
the awnser is D : it packages all the genes living thing
Explanation:
that outher awnser definetly wasnt helpfull . so i hope this helps:)
How did the scientists show that organisms and earth changed over times
Answer:
Here,
Explanation:
Scientists can roughly date fossils using radiometric dating, a process that measures the radioactive decay of certain elements. Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history.
17. Pedro and Denise were sharing a snack. Pedro drank some hot tea while Denise drank ice water. Which best explains the difference between the molecules in the hot tea and the ice water?
A. The molecules in the ice water move faster than in hot tea.
B. The molecules in the ice water move slower than in the hot tea.
C. The molecules in the hot tea have less energy than in the ice water.
D. The molecules in the hot tea have the same amount of energy as in the ice water.
Pedro and Denise were sharing a snack. Pedro drank some hot tea while Denise drank ice water: (B) The molecules in the ice water move slower than in the hot tea.
Why do molecules move slower in cold water?The molecules in hot and cold water are the same. Each molecule consists of one oxygen atom and two hydrogen atoms. The difference is the rate at which the molecules bounce about.
Because they contain energy, molecules are continually moving. Water molecules travel faster and are literally bouncing off one another when they are in a liquid state as opposed to a solid state. The quantity of potential energy in the liquid decreases as it cools, and the molecules begin to move more slowly.
Option (B) is the correct answer.
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21. The diagram shows oxygen moving into an animal cell.
Which statement best describes the cell after this process has occurred?
A. The concentration of oxygen will be higher inside the cell compared to outside the cell.
B. The concentration of oxygen will be lower inside the cell compared to outside the cell.
C. The concentration of oxygen inside and outside the cell will be nearly equal.
D. The concentration of oxygen inside the cell will be minimal or zero.
Peripheral tissues receive oxygenated blood via the circulatory system. Delivering oxygen to cells, oxygen diffuses through tissues along a gradient of high to low amounts. Thus, option B is correct.
What is the movement of oxygen in cell?Hemoglobin and oxygen interact chemically inside the red blood cell, where it is carried both by free diffusion and hemoglobin-facilitated diffusion. In blood plasma, oxygen is transferred by free diffusion and convection through cell membranes.
Therefore, The concentration of oxygen will be lower inside the cell compared to outside the cell.
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What does circulation look like in an newborn?
Answer:
During pregnancy, the unborn baby (fetus) depends on its mother for nourishment and oxygen. Since the fetus doesn’t breathe air, his or her blood circulates differently than it does after birth:
The placenta is the organ that develops and implants in the mother's womb (uterus) during pregnancy. The unborn baby is connected to the placenta by the umbilical cord.
All the necessary nutrition, oxygen, and life support from the mother’s blood goes through the placenta and to the baby through blood vessels in the umbilical cord.
Waste products and carbon dioxide from the baby are sent back through the umbilical cord blood vessels and placenta to the mother's circulation to be eliminated.
14. Examine the portion of the periodic table that contains neon, an unreactive gas in Group 18.
Which element would have similar properties to neon, and why?
A. Ar; elements in the same family of the periodic table share the same characteristics.
B. Fl; elements in the same period of the periodic table share the same characteristics.
C. Fr; elements on opposite corners of the periodic table share the same characteristics.
D. Li; elements on opposite sides of the periodic table share the same characteristics.
Answer:
Explanation: I believe it is, C. Fr; elements on opposite corners of the periodic table share the same characteristics.
Because it makes for sense
The element that is similar to neon is Ar; elements in the same family of the periodic table share the same characteristics. Option A
What is the periodic table?The periodic table has to do with the arrangement of the elements in such a way that there can be a systematization of the properties of the elements. We know that elements are said to be in the same group if they do have the same properties.
The elements that are in the same group with neon are the elements argon, krypton. These elements would have the same properties and they would tend to behave in a similar way.
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Which of the following evidence supports the theory of plate tectonics? (7 points)
a: The age of rocks and mountains on the edge of neighboring continents varies.
b: Fossils from the same species are found on only one continent.
c: Iron-rich, molten magma rocks no longer align to Earth’s poles in many locations.
d: Grooves created from glacier movement travel in opposite directions on each continent.
Grooves created from glacier movement travel in opposite directions on each continent. This is the proof or evidence of the theory of plate tectonics.
What are the tectonic plates ?It is the solid and massive irregular shaped slab of solid rock, generally composed of continental and oceanic lithosphere.
Glacial grooves on the rocks shows that the various proofs for moving glaciers towards the Atlantic ocean and from the Atlantic oceans onto the South America.
When oceanic or continental plates slide past each other in opposite directions or even in the same direction but with a different speeds and at that time a transform boundary is formed.
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Identify the cranial nerve and label its associated structures (denoted by green ID tags).
Optic Chiasm
Optic Nerve
Olfactory Bulb
Olfactory Nerve
Auditory Nerve
Ollactory Tract
Optic Tract
The first to the left is the Optic Nerve, The second to the left is the Optic Tract while the one to the right is Optic Chiasm of the labeled cranial nerves.
What are cranial nerves?The cranial nerves are of 12 pairs and can be found at the back of the human brain. These nerves specialize in sending electrical signals to the brain, face, neck and torso.
Optic nerve comprises of nerve fibers in millions and sends visual messages to the brain for sight and is located at the top left of the labelling. The optic tract serves also for visual information to the lateral geniculate bodies and located at the bottom left while the optic chiasm at the right side of the diagram sends signal to the optic tract.
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What caused the
evolution of
peppered moths?
A. their food source died off
B. a forest fire destroyed their habitat
C. their number of predators increased
D. the change in the color of their environment
A botanist is training a group of volunteers to survey the plants of a mature deciduous forest. The botanist wants to give the volunteers a lecture about the basic plant taxonomy they should know for identifying plants in the forest. What are the basic points the botanist should include in the lecture.
The basic points the botanist should include in the lecture about the basic plant taxonomy they should know for identifying plants in the forest are their life cycle and the species which are present in the area.
What is Botany?This is a term which is referred to as a branch of science which involves the study of the physiology and morphology of plants.
Plants are classified based on various features such as the type of roots, life cycle etc. The species which are present also helps to use their similarities in grouping them thereby making it the most correct points.
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Professionals in the field of psychology maintain a set of core values and ethics that differs slightly from
those held by social workers, because the needs and challenges of psychology patients are typically greater
than for clients who receive social services. Among the core values of psychologists are the efforts to treat
clients with fairness and honesty, to respect clients, and to
O discuss one client's problems with other clients
O do no harm to clients
O dispense prescriptions to clients
O criticize clients
Among the core values of psychologists are the efforts to treat clients with fairness and honesty, to respect clients, and to do no harm to clients and is denoted as option B.
Who is a Psychologist?This is referred to as a trained mental health professional who helps people handle their mental health challenges through the use of various types of methods and techniques.
They are involved in the treatment of clients with fairness and honesty which is a sign of respect and are not involved in dispensing of prescriptions to clients which is instead done by psychiatrists thereby making option B the correct choice.
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4
Developing countries tend to have
high birth rates. Why?
A. better access to birth control
B. more education for women
C. parents have more offspring to help with
chores
D. less risky behavior
What traits will this
individual
R=round and Y=yellow?
have if
RrYy
A. round and green
C. wrinkled and
yellow
B. round and yellow this
D. wrinkled and green
The traits this individual will show are Round and yellow.
What is gene?Gene is the unit of information inside a cell by which controls what a living thing will be like. Genes are to the passed from parents to children.
Here
R is dominant allele to r for shape, hence in Rr round will be the outcome.
Y is dominant allele to y for color, hence in Yy yellow will be the outcome.
Here law of independent dominance, works
According to Mendel's law of dominance, in heterozygotes one trait masks the presence of another for the same trait. The dominant allele is exclusively expressed instead of both alleles contributing to the phenotype.
So answer is ROUND and YELLOW (Option B).
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Do eukariota cells have mitochondria?
Do Eukaryotic Cells have Mitochondria?
The answer is YESIn addition to the nucleus, eukaryotic cells may contain several other types of organelles, which may include mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes.
What is a Eukaryotic cell?
A eukaryotic cell is one of two different types of cells. Organisms that are based on the eukaryotic cell are called “eukaryotes” and include plants, animals, fungi, and protists.
What is Mitochondria?
The mitochondrion (plural mitochondria) is a membrane-bound organelle found in the cytoplasm of eukaryotic cells. It is the power house of the cell; it is responsible for cellular respiration and production of (most) ATP in the cell. Each cell can have from one to thousands of mitochondria. Mitochondria also contain extranuclear DNA that encodes a number of rRNAs, tRNAs, and proteins.
what drives sexual selection
26. A student observes two cells under a microscope and lists observations in the table shown.
Which statement most likely describes the two cells?
A. Both Cells A and B are plant cells.
B. Both Cells A and B are animal cells.
C. Cell A is a plant cell; Cell B is an animal cell.
D. Cell A is an animal cell; Cell B is a plant cell.
Answer:
Explanation:
c because animal cells requires no wall to make tissue
plants need chloroplast to survive
Answer:
C.) Cell A is a plant cell; Cell B is an animal cell.
Explanation:
The two cells each have a nucleus and mitochondria, indicating they are eukaryotic cells.
The presence of chloroplast and a cell wall indicate that Cell A is a plant cell, as animal cells do not contain those structures.
Cell B is likely an animal cell because it has a nucleus, mitochondria, and no cell wall.
Can you please help me fast
Answer:
A.
Explanation:
Scientists classify different minerals by their elements.