Answer:
Why do geologists use the geologic time scale?
Because of the time span of Earth's past is so great, geologist use geologic time scale to show Earth's history.
What is the geologic time scale?
The geologic time scale is a record of the geologic events and the evolution of life forms as shown in the fossil record.
How do scientists develop the geologic time scale?
Scientists first developed the geologic time scale by studying rock layers and index fossils worldwide. With this information,scientists placed Earth's rocks in order by relative age. Later, radioactive dating helped determine the absolute age of the divisions in the geologic time scale.
What do the divisions of geologic time scale depend on?
The divisions of the geologic time scale depend on events in the history of life on Earth.
Hope these help, :)
Answer:
fossils
Explanation:
they used rocks which are fossils
Please I need help and thank to any one who helps
3. a) A plant can have either tall (7) stems or short (t) stems. Two plants are crossed. One has the
genotype Tt and the other has the genotype Tt. Fill in the Punnett square below for this cross. (1
point)
The punnett square would look like this
The punnett square is a resource that was conceived by RC Punnett, a collaborative geneticist for William Batenson (both lived between the end of the 19th century and the beginning of the 20th century, actively participating in the rediscovery of Mendel's work), which greatly facilitates the making of crosses between F-1 heterozygotes, by filling in the boxes that compose it with the genotypes resulting from the crossing performed.
The Punnet square of two organisms where one has the Tt genotype and the other the Tt genotype is shown in the image below:
Sensory receptors that are sensitive to chemicals are found in the a. skin, body core, and hypothalamus. c. eyes. b. skin, skeletal muscles, and inner ears. d. nose and taste buds.
Answer:
Explanation:
B?
Answer:THE ANSWER IS D: nose and taste buds.
Explanation:the nose can smell Here's how it works: While you're chewing, the food releases chemicals that immediately travel up into your nose. These chemicals trigger the olfactory receptors inside the nose. They work together with your taste buds to create the true flavor of that yummy slice of pizza by telling the brain all about it!
How can you identify is air is matter?
Answer:
Matter is anything that has mass and takes up space. Air is all around us, that is what we breath- oxygen-
Explanation:
It's easier to prove that air takes up space. As you blow into the balloon it will expand and that is a way to prove air is matter.
Where in the cell is the glucose produced? in mitochondria in chloroplasts in cytoplasm in water
Answer:
In chloroplasts
Explanation:
It is produces in the chloroplasts of the cell. Glucose is a simple sugar and photosynthesis produces the glucose and then glucose is transported into the cells. Chloroplasts are making sugar during the process of converting light energy into chemical energy and those are stored in glucose.
Chloroplasts are the food producers and we can find them in plant cells and eukaryotic algae.
a planned procedure to test a hypothesis is called bias true or false
Answer: false
Explanation:
Bias is leaning in favor of an opinion or statement. A planned procedure to test a hypothesis is called an experiment
which scientific investigation does not include dependent and independent variable?
1.observing and counting bird populations
2.studying the effect of temperature on bacterial reproduction rates
3.investigating the effect of mass on the speed at which an object falls
4.testing a model car's air flow resistance at different wind speeds in a wind tunnel
The scientific investigation without dependent and independent variables is observing and counting bird populations, which is an observational study and not a controlled experiment.
Explanation:The scientific investigation that does not include dependent and independent variables is observing and counting bird populations, which is an example of an observational study. In this type of investigation, researchers are simply making observations without manipulating any factor. Therefore, there isn't an independent variable being altered to see its effect on a dependent variable. However, in the other three options provided, there is a clear manipulation of one variable (the independent variable) to see its effect on another variable (the dependent variable), which classifies them as controlled experiments.
For example, in studying the effect of temperature on bacterial reproduction rates, temperature is the independent variable, and the bacterial reproduction rate is the dependent variable. Likewise, when investigating the effect of mass on the speed at which an object falls, mass is the independent variable, and the falling speed is the dependent variable. In testing a model car's air flow resistance at different wind speeds in a wind tunnel, wind speed is the independent variable, and air flow resistance is the dependent variable.
2. Factors that may affect variables are called
a. experiments.
b. hypotheses.
C. theories.
d. variables.
The factors that may affect variables are called theories. The correct option is C.
What are variables?A variable is defined as any property, number, or number of items that can be counted or measured. A variable is also known as a data item.
Dependent variables are so designated in spite of the thought that their values are to be investigated in a laboratory activity.
This can be done under the presumption or requirement that they are dependent on the value of other variables due to some law or rule.
A dependent variable is one that changes as a result of the independent variable's manipulation.
It is the desired outcome, and it is dependent on your independent variable. In statistics, dependent variables are often referred to as output responses.
Thus, the correct option is C.
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1. One of the products of cellular respiration is a reac
in photosynthesis. This product is
A. ATP.
B. carbon dioxide.
C. oxygen.
D. water.
Answer:
B. carbon dioxide.
Explanation:
In cellular respiration, the products are carbon dioxide (CO2), water (H2O), and energy in the form of adenosine triphosphate (ATP).
In photosynthesis, carbon dioxide (CO2) is used along with water (H2O) and light energy to produce glucose (C6H12O6) and oxygen (O2).
So, if the question is about a product of cellular respiration that is also involved in photosynthesis, the correct answer would be:
B. carbon dioxide.
It plays a role in both processes, being a product of cellular respiration and a reactant in photosynthesis.
Which was Ventor’s contribution to science? discovered the existence of single-celled organisms invented the light microscope discovered the structure of DNA invented a synthetic cell
Answer:Venter's contribution to science was the invention of a synthetic cell. The correct option is D. Craig Venter created a synthetic cell which is totally controlled by man-made genetic instructions.
Explanation:Just because
Answer:
The correct answer is invented a synthetic cell.
Explanation:
Ventor contributed significantly to humanity and science by discovering a synthetic cell. He did this by developing the genome of a bacterium and by inserting it into a cell. The cell was created by combining together the genome of a pathogen from small DNA stretches, which are produced in the laboratory.
The produced genome was then administered into a vacant cytoplasm of the associated bacterium. The pathogen utilized is known as Mycoplasma mycoides, it generally infests goats. The cell is the initial synthetic form of life in the world and has opened the gate for various kinds of researches.
Winds, known as trade winds, blow from east to west across the Pacific Ocean. These winds move water at the surface along the California coast Nutrients that would normally stay at the bottom of the ocean rise to the surface as well.
Which of the following conclusions is supported by the information above?
A) Trade winds help sustain some food chains.
B) Trade winds produce minerals in some oceans.
C) Trade winds can reverse parts of the water cycle.
D) Trade winds may be able to reduce global warming.
Answer:
A
Explanation:
The deep cooler currents in the oceans have more nutrients because of several factors;
They are cold and dense hence can hold much oxygenThe ‘scrap’ along the ocean floor hence carry with them dissolved mineral elements from the rocky bottom.The dead organisms that sink to the bottom of the oceans are carried by these currents.When the trade winds push the warm waters towards the east, the cooler water from the bottom upwell (from the west in a cyclic fashion) to replace the displaced water by the winds. They bring with them nutrients and oxygen that is great ‘fodder’ for plankton. The plants are then fed on by smaller fish like shrimps. The smaller fish are then preyed on by bigger fish hence sustaining food chains/webs.
Which describes the correct pairing of DNA bases?
O
A. C with G, and A with T
O
B. C with C, and G with G
O
c. C with A, and G with T
O
D. C with T, and G with A
SNE
Answer:
A
Explanation:
The base C always pairs with G, and A pairs with T or sometimes U,
C - G
A - T
The correct pairing of DNA bases, based on Chargaff's rules, is C with G, and A with T. This is due to the structure of these molecules and the number of hydrogen bonds they can form.
Explanation:In the universe of biology, the DNA bases are paired in a standard and specific manner which is essential to the proper functioning of DNA replication and the transcription of genes. These pairing rules are defined by scientist Erwin Chargaff's rule, also known as Chargaff's rules.
According to these rules, Cytosine (C) always pairs with Guanine (G), and Adenine (A) pairs with Thymine (T). Hence, the correct option among those provided would be A. C with G, and A with T.
This specific pairing is due to the structure of the molecules and the number of hydrogen bonds they can form: C and G form three hydrogen bonds between them whereas A and T form two hydrogen bonds. Any other pairing won't hold the DNA strands together sufficiently.
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Question 6 of 15
2 Points
Which of these volcanic eruption types is the least violent?
O
A. Pelean
O
B. Hawaiian
O
C. Strombolian
O
D. Plinian
Answer:
B.Hawaiian
Explanation:
Answer:. Hawaiian
Explanation:
Here is why. Among the options listed, the Hawaiian volcanic eruption type is the least violent. Hawaiian eruptions are characterized by relatively fluid basaltic lava that flows relatively gently from the volcano's vent. The lava often travels in streams or rivers and can create impressive lava fountains, but the explosions and ash clouds associated with Hawaiian eruptions are generally less intense compared to other types of eruptions like Plinian, Pelean, or Strombolian eruptions.
What cell parts are common to all of these cells?
Use complete sentences.
.
The cell parts common to all cells are:
Cell ,membrane, Cytoplasm ,Ribosomes, DNA .
Plasma Membrane: Every cell is enclosed by a plasma membrane, a lipid bilayer that separates the cell's interior from the external environment.
It regulates the passage of substances in and out of the cell.
Cytoplasm: The cytoplasm is the semi-fluid substance inside the cell where various organelles are suspended.
It contains water, ions, and molecules necessary for cellular processes.
DNA: Genetic material, in the form of DNA (deoxyribonucleic acid), carries the cell's hereditary information and instructions for cellular functions. It's present in all cells.
Ribosomes: Ribosomes are responsible for protein synthesis. They can be found in both prokaryotic and eukaryotic cells.
They read the genetic code and assemble proteins.
While these components are universal, eukaryotic cells have additional structures such as a nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and more, which are not present in prokaryotic cells like bacteria and archaea.
These differences highlight the distinction between prokaryotic and eukaryotic cells, but the common components mentioned above form the foundation for all cellular life on Earth.
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Question
What cell parts are common to all of these cells?
1). Sammy was a normal, healthy boy. There was nothing wrong in his life to indicate that he was in anyway different from anyone else. When he completed highschool he obtained a job in a factory where he operared a large machine press. One day, his hand got caught in the press and was cut off. It was replaces with an artifical hand that looked and operated almost like a real hand.
Is Sammy Alive? Yes or No
Explain the Reasoning
Answer:
Sammy is not alive, the reason behind this is because the word was. If he were still alive, it would be is. Hope this helps! also can i please have brainliest? x
Explanation:
Yes, Sammy is alive. Losing his hand and getting an artificial one doesn't change his life status. Vital organs and biological processes determine life, not limb loss.
Yes, Sammy is alive. The incident of losing his hand and replacing it with an artificial hand does not necessarily mean he is no longer alive. The loss of a body part does not define one's life status. Being alive is determined by the functioning of vital organs and biological processes, which are not affected by the loss of a single limb.
Despite the accident, Sammy's heart is still beating, he can breathe, and his brain is functioning. The artificial hand enhances his quality of life and functionality, but it does not alter his life status. As long as his essential biological functions persist, he remains alive.
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PLZ HELP ME I NEED THIS TONIGHT!!! Which of the following describes soil and temperature in an ecosystem?
A.unnecessary factors
B.abiotic factors
C.biotic factors
D.selection factors
Answer:
[tex]B.[/tex] [tex]Abiotic[/tex] [tex]Factors[/tex]
Explanation:
Abiotic factor: Nonliving chemical and physical parts, just like temperature and soil in an ecosystem
As far as the ecosystem is concerned, soil and temperature are abiotic factors.
The biotic factors of the ecosystems are living factors. They consist of all the living organisms and their relationship with each other in the ecosystem.
The abiotic factors are also known as nonliving factors. They include soil, temperature, pressure, salinity, wind, etc.
Thus, temperature and soil are parts of the nonliving factors of the environment.
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what is density and what does it tell you about a substance
Answer:
Density is the characteristic property of the substance. Density is related to mass and volume of the substance.
Explanation:
Density of the substance decides whether it will float or submerge in water or any other liquid. If the substance is denser than the liquid then it will sink and if its density is lower than the liquid then it will float.
Density is written in kilogram per cubic meter. For instance, the density of oil is lesser than water and hence, it floats.
A measurement is considered ___________ if it actually measures what it is intended to measure, according to the topic of the study.
Answer:
valid
Explanation:
A measurement is considered valid if it actually measures what it is intended to measure, according to the topic of the study.
Validity can be described as accuracy of something. Validity is measuring something which we are actually supposed to measure, whereas reliability shows how consistent or convenient are the results. Validity states how much accuracy is present in a statement, concept or measurement. The term 'valid' is known to be derived from a Latin word "validus" which means to be strong.
A scientific theory
A) Holds the highest level of acceptance
B) Explains a number of facts
C) Uses a specific hypotheses and descriptive laws that have been well-tested
D) All of the above
E) None of the above
All of the above statements describes scientific theory
Answer: Option D
Explanation:
A scientific theory is a clarification of a part of the characteristic world that can be more than once tried and confirmed as per the logical strategy, utilizing acknowledged conventions of perception, estimation, and assessment of results. Where potential, hypotheses are tried under controlled conditions in an examination.
In conditions not amiable to trial testing, speculations are assessed through standards of deductive thinking. Set up logical speculations have withstood thorough examination and epitomize logical information. The importance of the term scientific theory as utilized in the control science that is altogether unique in relation to the basic vernacular utilization of theory.
In ordinary discourse, the hypothesis can suggest a clarification that speaks to an unconfirmed and theoretical guess, while in science it depicts a clarification that has been tried and broadly acknowledged as substantial. These various utilization are practically identical to the contradicting uses of forecast in science versus basic discourse, where it signifies a simple expectation.
Describe the way magmas are produced in subduction zones. (Help!!!!)
The top layer of soil in the tundra that thaws in the summer is called the _____.
A. active zone
B. dense mat
C. photic zone
D. permafrost
Answer:
Active zone
Explanation:
Which of these is considered to be the "king" of the social sciences
Geography
Economics
Sociology
Political science
Answer:
Economics is considered king amongst them
Economics is considered the 'king' of the social sciences.
Economics is a social science that studies the production and allocation of wealth in society.
Sociology examines human society, political science studies the governing of groups and countries, and geography focuses on spatial relationships and interactions among humans.
A location to which you compare other loca
on an obiect
Answer:
What does that even mean
identify a similarity between carbohydrates and lipids
Answer:
Carbohydrates and lipids are both macronutrients and provide several key functions to the human body.
Explanation:
These nutrients have similar chemical structures and the body uses carbohydrates and lipids in similar ways. Carbohydrates are molecules composed of carbon, hydrogen and oxygen, with a ratio of one atom of carbon and two atoms of hydrogen for every atom of oxygen. Lipids have the same elements as carbohydrates, but differ in their linkage.
A certain atom has an atomic number of four. How many protons does it have?
Answer: 8 Protons
Explanation:
I think because consider the element helium. Its atomic number is 4, so it has four protons in its nucleus. Its nucleus also contains four neutrons. Since 4+4=8,the mass number of the helium atom is 8.
Answer:
beryllium 4 protons
Explanation:
Because plants don’t have interior or exterior skeletons they rely on their cells walls to give them support . Did you see evidence of the cells structure in plants ? How was it different from animal cells
Answer:
Plant cells have cell walls and this is how they differ from animal cells because animal cells do not have cell walls. Animals don't need cell walls because they have skeletons that help stabilize their bodies. The cell wall provides structure and strength to the cell. I saw evidence once when I was in a biology class.
I did see evidence of the cell structure in plants. Plant cells have a cell wall, which is a rigid structure that surrounds the cell membrane.
How are plant and animal cells different ?The cell wall is made up of cellulose, a complex carbohydrate that gives plants their strength and rigidity. Animal cells do not have cell walls. The cell wall provides support and protection for the cell.
Plant cells have chloroplasts, which are organelles that contain chlorophyll. Chlorophyll is a green pigment that helps plants to photosynthesize. Animal cells do not have chloroplasts. Plant cells have a large central vacuole, which stores water and other nutrients. Animal cells do not have a central vacuole.
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How do you know if the cell will shrink or swell?
In a hypertonic environment, a cell will shrink due to water loss. In a hypotonic environment, a cell will swell due to water gain. In an isotonic environment, the cell will maintain its size as there is no net water movement.
Explanation:Whether a cell will shrink or swell depends on the type of environment it is in. When it is placed in a hypertonic environment, which has a higher concentration of solutes, the water will leave the cell to maintain equilibrium, and the cell will shrink. This process is known as crenation.
However, if the cell is in a hypotonic environment where the concentration of solutes is low, water will move into the cell to balance out the solute concentration, causing the cell to swell. If the intake of water goes to excess, the cell may burst, a process known as lysis, due to the excessive influx of water.
Finally, in an isotonic environment, where the concentrations of solutes inside and outside the cell are the same, there is no net water movement, so the cell will neither swell nor shrink.
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Josey wants to look at the cells of an onion under a light microscope. She peels off a thin, transparent layer of onion and places it on a microscope slide. Josey places the sample on the microscope stage, looks through the eyepiece, and adjusts the stage to focus the image. However, she is unable to see any details of the cells.
Which of the following possible solutions could possibly help Josey to see the onion cells in detail?
A. Josey should use a thicker piece of onion for her sample.
B. Josey should place her onion sample in a vacuum.
C. Josey should place a drop of water on her sample.
D. Josey should apply a stain, such as iodine, to her sample.
Answer:
D
Explanation:
Staining allows for visualization of cells and its organelles under a microscope because cells in their natural form are either transparent or translucent. There are different staining techniques depending on the type of microscope being used, the type of cell being visualized, identification of cells, and etcetera. In this case iodine is used because it is well taken by starch molecule in the onion cells hence increasing visualization of the cell.
The possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.
Most cells and cell structures appear translucent if you try viewing them with a microscope in their natural form. They are not transparent.
To make these cells and their organelles transparent when viewing under a microscope, different staining techniques are usually employed, depending on the type of cells and the microscope being used.
Onion cells can be made transparent under a microscope if it is stained with iodine.
Therefore, the possible solution that Josey can employ that will make her see the details of the onion cell under a microscope is: D. Josey can apply a stain to her sample, such as iodine.
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Identify the parts of the atom that are labeled in the
diagram.
Label A:
Label B:
Answer:
Label A: Nucleus
Label B: electron cloud
Explanation:
Without the precise diagram, Label A might refer to the central atom or the atomic number, and Label B could refer to surrounding atoms or the mass number. These labels generally correspond to specific parts of an atom or molecule, which include the nucleus and electrons in the context of atomic structure.
Explanation:The question appears to be related to the structure of the atom and its components. Although the exact diagram for Label A and Label B is not provided, based on the provided references, we can infer that Label A may refer to the central atom in a molecule, while Label B could be addressing the atoms surrounding the central atom. Moreover, in the context of atomic structure, Label A might signify the atomic number, and Label B might represent the mass number, as indicated in reference to Figure 1.8.3 which states that the atom's symbol includes the atomic number and mass number.
In atomic physics, key parts of the atom typically include the nucleus (comprised of protons and neutrons) and the electrons that orbit around it. The nucleus is the dense center of the atom, containing most of the atom's mass, while the electrons are subatomic particles with a negative charge that move around the nucleus in what are known as electron clouds or shells.
If the diagram provided to the student was similar to the one described in the references, Label A and Label B would likely be pointing to specific parts of the atom or to elements in a compound or molecule depending on the context given within the diagram.
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Why types of organism were hypothesized to be inhabiting earth prior to the rise of oxygen
Answer:
The organism Cyanobacteria was the first organism to inhabit t he Earth prior to the rise oxygen in the atmosphere.
Explanation:
The single-celled Cyanobacteria were known to be the first oxygen-producing organisms even before the rise of oxygen in the atmosphere or the "Great Oxidation Event," way back 3.5 million years ago. They were able to survive the harsh conditions of the Earth by photosynthesis. During this process, the Cyanobacteria would use sunlight, water and organic carbon dioxide to produce sugar for their energy. As a waste product, oxygen was released to the atmosphere. Accumulation of the oxygen in the atmosphere was increased by the presence of the volcanic gases like hydrogen, reacting with the oxygen. This caused a reduction reaction and made a more viable oxygen-rich atmosphere.