Answer:
The correct answer is (A). Stimulus travels as a nerve signal on a nerve fiber. EDIT: Answer B
Explanation:
23. A student performs an activity in which a soluble colored substance is dropped in a beaker filled with water, as shown in the figure.
Which statement explains why the water in the beaker is a uniform color after a period of time?
A. The molecules of the colored substance move randomly through the water, with the majority moving from an area of high concentration to an area of low concentration.
B. The water molecules are altered and replaced by the molecules of the colored substance.
C. The molecules of the colored substance move randomly through the water, with the majority moving from an area of low concentration to an area of high concentration.
D. The colored substance molecules are altered and replaced by the molecules of the water.
Answer: A. The molecules of the colored substance move randomly through the water, with the majority moving from an area of high concentration to an area of low concentration.
Explanation: When a substance is dissolved in water or any other substance, the molecules will move to an area they have not. When food coloring is placed in water, it moves to areas it hasn't touched because it has to expand.
11. The diagram shows the formation of water from hydrogen and oxygen.
Which statement is true?
A. The reaction satisfies the Law of Conservation of Matter because only one type of substance is formed as a product.
B. The reaction satisfies the Law of Conservation of Matter because the number of each type of atom is the same in the products and reactants.
C. The reaction does not satisfy the Law of Conservation of Matter because the atoms are in different arrangements in the products and reactants.
D. The reaction does not satisfy the Law of Conservation of Matter because the new substance formed is made up of two types of atoms.
The reaction satisfies the Law of Conservation of Matter because the number of each type of atom is the same in the products and reactants.
The above given statement is true.
What is the "Law of Conservation of Matter"?
The "Law of Conservation of Matter" states that "matter can neither be created nor be destroyed". In other words, the total mass of an isolated system remains constant over time, as mass is neither created nor destroyed. This law applies to all types of matter, including atoms, molecules, and energy.
What are Atoms?
Atoms are basically the basic building blocks of matter. They are composed of protons, neutrons, and electrons and are the smallest particle of an element that still retains the properties of that element. Atoms are the fundamental units of chemistry and form the basis of all matter in the universe.
Therefore the option that is true is Option B.
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13. Marla has 4 cards labeled Q, R, X, and Z to represent four different elements. She knows the number of protons for each element but not the element's identity. The table shows the number of protons for each different element.
What can be concluded about the elements represented by Marla's cards?
A. Q, R, X, and Z are nonmetals.
B. Q, R, X, and Z are metals.
C. Q and Z are both nonmetals.
D. R and Z are both metals.
Marla has four cards labeled Q, R, X, and Z to represent four different elements: nitrogen, calcium, germanium, and bromine, and Q and Z are both nonmetals. Option C is correct regarding the elements.
What is the atomic constitution?The atom contains electrons, protons, and neutrons, and the electrons revolve outside on their orbits while the proton and neutron are present in the center. The proton and electron numbers are the same in the neutral atom, so from the proton number, the atomic number of the element can be determined. Here, Q (nitrogen) and Z (bromine) are nonmetals, the R (calcium) is a metal, and the X (germanium) is a metalloid.
Hence, Option C is correct regarding the elements, as Q and Z are both nonmetals.
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Why is earthquake prediction a challenge for scientists? In your answer, explain why scientists aren’t able to develop a warning system for earthquakes.
Answer:
We do not know how, and we do not expect to know how any time in the foreseeable future. USGS scientists can only calculate the probability that a significant earthquake will occur (shown on our hazard mapping) in a specific area within a certain number of years.
Answer:
Earthquake prediction is a challenge for scientists because of the complex and variable nature of earthquakes. They can be caused by a number of factors, including tectonic plate movement, volcanic activity, and changes in the Earth's crust. These factors can interact in complex ways that make it difficult for scientists to develop a warning system for earthquakes.
Earthquakes can even occur without any warning signs, making them difficult to predict. Although scientists are able to identify potential earthquake hazards, they cannot always predict when or where an earthquake will occur, making it tough to develop an effective warning system.
Scientists are constantly working to improve our understanding of earthquakes and how to predict them. However, the challenge remains due to the complex and ever-changing nature of earthquakes.
How can technology challenge a global problem such as food insecurity?
Answer: Biotechnology can do this by helping to protect crops from weeds, insects, and other pests, biotechnology has helped to lower the likelihood of failure.
Explanation:
Biotechnology is the application of biology to the problem-solving and product-making processes. The most popular method is genetic engineering, which enables researchers to change an organism's DNA as they see fit.
The environmental impact of agricultural development has been diminished thanks to improvements in crop productivity and food security brought about by plant biotechnology.
Providing farmers with easier access to technology could help address the global crisis of hunger and food insecurity. According to the World Health Organization, genetic engineering has the potential to improve food production, nutritional quality, storage stability, and pest resistance.
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The graph shows the projected increase in the world population and the projected changes in the populations of individual continents. Which statement is supported by the data in the graph?
A. The fertility rate on Earth is increasing quickly.
B. The birthrate on Earth is higher than the death rate.
C. Earth's carrying capacity has been surpassed.
D. Earth's immigration rate is higher than its emiaration rate.
The graph shows the projected increase in the world population and the projected changes in the populations of individual continents: (A) Earth's population will increase quickly because the graph is between millions of people and world population growth.
What is World population?Any whole group that shares at least one trait is referred to be a population. Populations are more than simply individuals. Populations may include—but are not restricted to—people, animals, organizations, structures, houses of worship, automobiles, farms, and other things or occasions.
Rapid population growth makes it more difficult for low- and lower-middle-income nations to finance the per capita rise in public spending required to eradicate poverty, end hunger and malnutrition, and assure universal access to health care, education, and other important services.
The current world population of 7.6 billion is expected to reach 8.6 billion in 2030, and 9.8 billion in 2050 according to the UN.
Thus, we can conclude that the earth's population will increase quickly.
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In two or more complete sentences, compare the four different types of organic molecules in living organisms. Write your answer in the essay box below.
Answer: The four main groups of biologically important organic compounds are carbohydrates, lipids, proteins and nucleic acids.
Explanation:
The parent cell has 46 chromosomes how many caulk be in each daughter cell in mitosis
Answer:
Explanation:
23 because they only get half the chromesonses
can I turn my cat into a diamond?
Answer: Probably
Explanation: Use the ashes and ask someone to turn it into. It probably will cost alot
area of a reserve that helps to protect any
negative impact of human activities (2 words)
why carbohydrate digestion occurs first in mouth?
The digestion of starch carbohydrate is initiated in mouth due to the action of starch digesting enzyme ptyalin or salivary amylase present in saliva secreted by salivary glands. Enzymatic hydrolysis helps in the partial breakdown of starch (polysaccharide) into maltose and isomaltose (disaccharides) and small dextrins called 'limit' dextrins. Nearly 30% of the starch is hydrolysed in the oral cavity because of the shorter time the food is retained here
due to the action of starch the carbohydrate digestion occurs first in mouth
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Answer:
no
Explanation:
all oxegyn going through your body gets there from your blood flow
1. What symptoms is Nicholas experiencing?
Answer:
Severe abdominal pain after eating
TRUE OR FALSE
Genetic disorders in human mitochondrial DNA cannot be inherited via
maternal inheritance.
What is a NEGATIVE effect of
genetic drift?
A. the development of a new species
B. the cause of a mass extinction
C. the loss of diversity within a population
D. the movement of organisms
The statement which represents a negative effect of genetic drift is that it involves the loss of diversity within a population. Thus, the correct option for this question is C.
What is Genetic drift?Genetic drift may be defined as a type of non-directional and random fluctuation in which allele frequencies of a population may change over generations due to chance or sampling errors. It takes place in all populations of non-infinite size.
This type of evolutionary force arises through a genetic bottleneck which develops when a population undergoes a drastic reduction in population size. So, the loss of genotypes of diversity within the population is one of the major negative effects of genetic drift.
Therefore, the correct option for this question is C.
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There are two main ways in which molecules are transported into and out of cells: active transport and passive transport. Which of the following is an example of active transport?
Answer:
Explanation:
The uptake of glucose in the intestine of the human body and also the uptake of minerals or ions into the root hair cells of the plants
How does the plasma membrane contribute to the structure and function of the cell
Answer:
It contributes to the structure and function because it is a thin membrane that surrounds the cell and controls what goes in and out of it.
Explanation:
An antelope population has a negative population growth rate. Which of the following conditions must also be true for the population growth rate to be negative?
a. births + deaths < immigrations + emigrations
b. births + deaths > immigrations + emigrations
c. births + immigrations < deaths + emigrations
d. births + immigrations > deaths + emigrations
The antelope population has a negative population growth rate. So, the birth rate + immigration rate of the population will be less than the death rate and emigration rate. Thus, the correct option is C.
What is Population growth rate?Population growth rate is the increase or decrease in the number of individuals in a population or a dispersed group. Population growth depends upon several factors which include:
1. Birth rate: It is the total number of new births in a population. It increases the population growth.
2. Death rate: It is the total number of deaths in a population. It decreases the population growth.
3. Immigration: It is the entry of new individuals through migration into a population. It increases the population growth.
4. Emigration: It is the removal or migration of individuals from a population. It decreases the population growth.
Thus, a population with negative population growth rate will have birth rate and immigration less than the death rate and emigration rate.
Therefore, the correct option is C.
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Select three events that occur as an unspecialized cell differentiates into a cell that helps transport water in plants.
Answer:
Explanation:
Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals. These changes are largely due to highly controlled modifications in gene expression and are the study of epigenetics.
The three events that occur as an unspecialized cell differentiates into a cell that helps transport water in plants are as follows:
Formation of vascular bundles like xylem and phloem.Cells are adapted to perform the process of photosynthesis and transpiration.Cells of the plant tissue become more compact than usual. What is cell differentiation?Cell differentiation may be defined as the process during which young, immature (unspecialized) cells take on individual characteristics and reach their mature (specialized) form and function.
In order for a cell to differentiate into its specialized form and function, it need only to manipulate those genes (and thus those proteins) that will be expressed, and not those that will remain silent. The primary mechanism by which genes are turned “on” or “off” is through transcription factors.
Therefore, the three events that occur as an unspecialized cell differentiates into a cell that helps transport water in plants are well-described above.
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Which represents a strand of RNA bases?
TGGCTCGAA
UGGCUCGAA
GTTAGTGCC
CAATCTAGG
The correct strand of RNA bases is UGGCUCGAA. Therefore, the correct option is B.
What is a nucleotide?RNA is a nucleic acid that is composed of nucleotides. A nucleotide is composed of a sugar molecule, a phosphate group, and a nitrogenous base. RNA differs from DNA in its single-stranded structure, the presence of uracil instead of thymine, and the sugar molecule being ribose.
The sequence of bases determines the genetic information in RNA. The bases in RNA are adenine, cytosine, guanine, and uracil. The sequence UGGCUCGAA represents an RNA sequence of bases.
The sequence UGGCUCGAA transfers the genetic information from the DNA to ribosomes, where the sequence is translated by ribosomes into amino acids, which results in the formation of a specific protein with a unique function in the cell.
Therefore, the correct strand of RNA bases is UGGCUCGAA.
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A cellular process is shown in three steps
Answer:
The cell cycle is composed of interphase (G₁, S, and G₂ phases), followed by the mitotic phase (mitosis and cytokinesis), and G₀ phase.
Explanation:
Source: Khanacademy
Brainliest, Please!Compare mitosis and meiosis in the following two attributes:
- the number of copies of DNA and whether the copies are different
-what kinds of cells undergo these two processes
Thank you!
Mitosis may be defined as a type of cell division in which a parental cell is divided into two daughter cells that are genetically identical to them. These daughter cells are diploid in nature. Somatic cells of the body undergo this process of cell division.
What is Meiosis?Meiosis may be defined as a type of cell division in which a parental cell is divided into four daughter cells that are genetically unique to them. These daughter cells are haploid in nature. Germ cells (gamete cells) of the body undergo this process of cell division.
Therefore, the comparison of mitosis and meiosis in the following attributes is well described above.
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- Select All Similarities Between Replication, Transcription, and Translation.
Replication, Transcription and Translation Requires a DNA Template.
Replication, Transcription and Translation Requires a RNA Template.
Replication and Transcription Requires a DNA Template.
Replication and Transcription Requires a RNA Template.
Replication and Translation Requires a DNA Template.
Replication and Translation Requires a RNA Template.
Transcription and Translation Requires a DNA Template.
- Transcription and Translation Requires a RNA Template.
M
The similarity between Replication, Transcription, and Translation is the fact that Replication and Transcription require a DNA Template (Option C).
What are Replication, Transcription, and Translation?Replication is the duplication of the genetic material, Transcription can be defined as the generation of an RNA template for a given cell function and Translation is the generation of proteins ready for their use in the cell.
Therefore, with this data, we can see that Replication, Transcription, and Translation are distinct cellular processes that have differential functions but both Replication and Transcription are similar in the sense both use a DNA sequence.
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What is a common misconception
of evolution?
A. Evolution is a slow process.
B. Evolution is a theory and there is evidence for it.
C. Evolution was developed by Charles Darwin.
D. Evolution is when apes stood up and developed
into humans. This
A common misconception of evolution is that it is when apes stood up and developed into humans (option D).
What is evolution in biology?Evolution is the transformation of animals, plants and other living things into different forms (now understood as a change in genetic composition) by the accumulation of changes over successive generations.
The theory of evolution is based on the idea that all species are related and gradually change over time.
Charles Darwin, who developed evolution, proposed a theory which states that evolution happens by natural selection. Darwin published his theory of evolution in the origin of species where he presented evidence to support this theory that all life on earth evolved from a common ancestor.
Therefore, option D is a misconception of evolution.
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The water flows from the
point to
points and joins together
Answer:
All rivers and streams start at some high point. The high point can be a mountain, hill, or other elevated area. Water from some source like a spring.
what came first, the chicken or the egg? explain your reasoning, and backup your argument :)
Answer:Egg
Explanation:
The egg came first since thats how a chicken would be born in the first place
the chemical ______ for neon is NE
2. Using the sources given, identify the total number of negatively charged particles in this atom.
A. 22 electrons
B. 18 protons
C. 22 neutrons
D. 18 electrons
Explanation:
Ans: D
by counting the no of electrons in the diagram we have 18 negatively charged particles (electrons)
please mark brainliest
Atoms have negatively charged electrons. An atom's electrons balance the nucleus' protons' positive charge. By counting the red dots, we can say that there's total 18 electrons.
What is an atom?An atom is a subatomic particle of matter that serves as the fundamental unit of definition for each individual chemical element. Atoms are made up of a positively charged nucleus in the center that is surrounded by one or more electrons that have a negative charge. The nucleus has a positive electric charge and may house one or more relatively massive particles called protons and neutrons.
The positive charge that is carried by the protons in the nucleus of an atom is countered by the negative charge that is carried by all of the atom's electrons working together.
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The picture below shows flowers on a tomato plant.
Lacy wants to design an experiment that will show which part of a tomato flower grows into the tomato fruit. What measurement could she make to study how the fruit grows?
Lacy wants to design an experiment that will show ovary part of a tomato flower grows into the tomato fruit.
What is ovary for plant?The female reproductive organ present in flowering plants is the ovary. It is present in the flower's gynoecium. It is a portion of the pistil that holds the ovules and is located near the base of the sepals and petals. A single carpel or numerous carpels joined together can form the pistil.
Ovaries, as we know, are an essential component of the plant's female reproductive system. Well, the ovaries are where pollen is kept before developing into ovules and ultimately seeds. These seeds then germinate, causing the ovaries to grow and convert into fruits.
Even though the blooms are self-fertile, the pollen is nevertheless moved to the female half of the blossom by wind and the buzzing of bees' wings. The young tomato grows after fertilization, when the petals and stamens fall off.
So, Lacy will show ovary part of a tomato flower grows into the tomato fruit.
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A population of insects gradually
decreases in number due to their
changing environment. Eventually, no
individuals are alive.
This process describes which type of
extinction?
A. background extinction
B. immediate extinction
C. explosive extinction
D. endangered extinction
Answer:
A
Explanation:
A [: