Answer:
D 40 billion
Explanation:
Every 35 years the world population is expected to double, so you just follow those calculations.
Answer:
d. 40 billion
Explanation:
As the solar system was forming about 4.5 billion years ago, Earth was being bombarded by small-diameter rocks,
comets, and debris. What effect did this debris likely have on Earth's early surface?
The debris had some effects on the earth.
Explanation:
During the younger years of earth it was subjected to the effects of various asteroid hits and attack of leftovers from failed planets. The period of the universe before 4.5 billion years ago to 3.8 billion years ago was one of vigorous activity. The terminal period is known as Late Heav Bombardment and it was the period of most violent activities.
The attacks from asteroids and failed planets caused cracks and scars on the surfaces of several planets. The impact is more visible in the case of small planets. Signs of the attacks in the LHB can also be found on earth but they have become less visible over the years due to weathering process that takes place on earth.
Signs of collisions can be clearly seen in planets like Mercury, Venus and Mars which are rocky planets. Moon also has several signs of collision. It is also suggested that the water on earth came from asteroids that hit the earth. The atmosphere of the earth prevented this water from escaping.
Answer:
Craters were likely formed on Earth’s surface.
Explanation:
In a controlled scientific experiment, the ___________ variable is manipulated by the researcher.
A) control
B) dependent
C) experimental
D) independent
Answer: Independent variable
Explanation:
Independent variable is manipulated by the researcher to determine the effect of its change relative to a change in dependent variable.
In a controlled scientific experiment, the independent variable is manipulated by the researcher.
The correct answer is option D.
The independent variable is the variable that the researcher intentionally changes or manipulates in order to observe its effect on the dependent variable. It is called "independent" because its variation is not dependent on other factors in the experiment; rather, it is controlled by the researcher to test a specific hypothesis or research question.
Here's a breakdown of the different variables in a scientific experiment:
Independent Variable: This is the variable that the researcher selects and manipulates to investigate its impact on the dependent variable. It represents the cause or factor that is being tested.
Dependent Variable: The dependent variable is what the researcher measures or observes as the outcome or response in the experiment. It is affected by changes in the independent variable and represents the effect or result being studied.
Control Variable: Control variables are other factors or conditions in the experiment that are kept constant or controlled to ensure that any observed effects are due to the changes in the independent variable and not influenced by external factors. They help maintain the integrity of the experiment.
Experimental Group: This group is exposed to the manipulation of the independent variable. It is used to observe and measure the effects of the independent variable.
Control Group: The control group is a group that is not exposed to the independent variable or is exposed to a standard or baseline condition. It serves as a baseline for comparison with the experimental group.
In summary, the independent variable is the variable that is intentionally changed or manipulated by the researcher in a controlled scientific experiment. This manipulation allows researchers to investigate the causal relationship between the independent variable and the dependent variable, helping to answer research questions and test hypotheses.
Therefore, from the given options the correct one is D.
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how to both plants and animals fight pathogens
A Antigens
B Antibodies
C Marcrophages
D pathogens
Answer:
Both plants and animals fight pathogens with the help of Antibodies
Explanation:
It is also referred as the immunoglobins, they are of Y shaped. Generally they are proteins that has been produced by the plasma cells which are being used by the immune system so as to neutralize pathogens like bacteria as well as virus. They are helpful in fighting with the germs but at times it starts acting against the bodies healthy cell these also reduces the person’s immune system. There is a test that checks how the antibody is working against the red blood cells i.e. Coombs test. Antibodies can be found in the body fluid as it moves through the bloodstream.
The p53 gene performs what function
Final answer:
The p53 gene acts as a tumor suppressor that either repairs damaged DNA or signals cell apoptosis. A faulty or mutated p53 gene can lead to unregulated cell division and cancer. Over half of human tumors are associated with p53 gene mutations.
Explanation:
The p53 gene functions as a crucial tumor suppressor, often described as the "guardian of the genome". It has a significant role in preserving stability by preventing genome mutation. The p53 protein, encoded by this gene, is a multifunctional transcription factor that is activated in response to DNA damage and cellular stress. It operates primarily at the G1 checkpoint in the cell cycle, where it assesses the integrity of DNA before allowing the cell to continue to the next phase of division.
When DNA damage is detected, p53 triggers repair mechanisms and can induce cell cycle arrest, facilitating DNA repair by activating various genes. If repairs are unsuccessful, p53 can signal for apoptosis (programmed cell death), preventing the propagation of damaged DNA. Conversely, when the p53 gene is mutated, its function is impaired, potentially allowing damaged DNA to remain uncorrected and leading to cancer development.
More than 50 percent of human tumor cells have been associated with mutated p53 genes, which underscores the gene's vital role in cancer prevention. The p53 protein also ensures that cells with irreparable damage do not continue to divide, and can shift cellular energy pathways, highlighting its importance in cellular metabolism and growth regulation.
please answer :)
Groundwater is a significant source of freshwater for many people. Do you think it’s necessary to monitor water wells for possible contamination by factories and other industries? How often should testing take place? Explain your answer.
it’s necessary to monitor water wells for possible contamination by factories and other industries? yeah because some of industries and factories produce soluble wastes such as Nitrate compound eg agriculture fertilizer making industry also indirectly may polute ground water through activity of acidic rain by acidic gas they produced
Testing should be taken regularly as it's impact can be anytime as water pollution effect is proportional to the waste product produced such as land degradations
Water testing is paramount important to ensure the quality of drinking water and to avoid the diseases spreading from water contamination. There are many more possibilities for water to be contaminated by the nearby industrial effluences.
What is water contamination?Contamination of water by hazardous and toxic chemicals is a serious issue nowadays. There are lot of industries and factories working side to the water sources and they are disposing the chemical wastes to the river sides.
Through these industrial effluents many toxic chemicals and heavy metals such as lead, cadmium, arsenic etc. are reaching water and by using this water results in serious health risks.
Therefore, the quality of water must be checked to ensure that the presence of of these metals and other particulates are only up to the limit. Similarly the presence of microbes , pH and alkalinity of the water must be checked.
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What steps occur during interphase that prepare a cell for division?
Answer:
during interphase the celll grows (G1) replicates the dna( S) and prepares for mitosis(G2)
Which of the following is a eukaryotic cell?
Select all that apply
Hi there!
The most important thing to note here is that eukaryotic cells have nuclei. This is the circular blob-like organelle which encases the DNA. Some other differences eukaryotic cells have over prokaryotic cells include more complicated organelles which are membrane bound.
If we look at these images, what we are looking for is a nuclei, as this will appear most evident. When we look at A and B, we can see a circular organelle that is extremely prominent. However, with C and D, that does not appear. C specifically, the nucleic code is exposed and not membrane bound, meaning it is not prokaryotic. D does not appear to contain a nucleus or any genetic material.
Thus, your answer is A and B.
Hope this helps!
Eukaryotic cells are cells that have nucleus and other membrane-bound organelles such as mitochondrion and chloroplast. The correct options would be A and B.
From the diagrams, the nucleus and other organelles can be seen clearly from A and B. Diagram C has nucleoid in the place of a nucleus, an indication that it is prokaryotic rather than eukaryotic. The content organelles of D are not obvious.
Hence, the diagrams that clearly showed the presence of a nucleus are those that are eukaryotic.
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a hydrogen atom that los s its electron and becomes positively charged is called a(n)
Answer:
hydrogen ion
Explanation:
A hydrogen ion is created when a hydrogen atom loses or gains an electron. A positively charged hydrogen ion (or proton) can readily combine with other particles and therefore is only seen isolated when it is in a gaseous state or a nearly particle-free space.
define the role of the sun in providing energy for living things on earth?
Answer: The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs
Answer:
The sun provides us energy from a process called nuclear fusion
Explanation:
Fusion heats the sun so the sun can give us energy.
The Thyroid, parathyroid, And thymus are located in the
Brain
Throat
Abdomen
Answer:
Throat.Thyroid plays a major role in metabolism,Thymus plays a vital role in producing white cells which help to fight off disease and. in increasing immunity.Parathyroid is vital in producing calcium.
Give an example of a short-term disruption of homeostasis.
Answer:
Respiratory acidosis is an example of short term disruption of homeostasis.
Explanation:
Respiratory acidosis occur when an individual breath in an atmosphere rich in carbon dioxide.
The excess CO2 enters within that individual body during breathing,reacts with water to form carbonic acid(H2CO3) resulting in the disruption of acid base balance of our body.
This ultimately result in the occurrence of respiratory acidosis.
A short-term disruption of homeostasis can be sweating in response to heat or tanning due to UV exposure, which are both reversible processes to maintain body equilibrium.
Explanation:An example of a short-term disruption of homeostasis is when you step into a hot environment after being in a cool one. Your body will initiate sweating to cool down, maintaining your core temperature. Another example is tanning, which is a response to increased UV radiation. Sweating quickly ceases when the body cools, and tans fade when UV exposure decreases. Homeostasis is integral for health, as failures can lead to conditions like diabetes, where the body can no longer regulate blood glucose levels. Medical intervention may be needed to restore homeostasis and prevent damage.
Which part of the diagram shows this interaction? hydrosphere → atmosphere
Answer:
the answer is (evaporation)
Explanation:
i jus took the assignment
if the generation time is 90min and the initial population is 10^3, how many bacteria growth will you get after 8hrs
Answer:
5333
Explanation: if 1000 bacteria need 90 minutes for their growth then in 8 hrs the population of bacteria reach upto 5333.
how does the property of water pictured below help a plant to thrive?
The adhesion and cohesion property of the water helps a plant to thrive.
Explanation:
The adhesion and cohesion property of the water is the two most important properties of water that regulate how water will work at different places of a plant. When water gets attracted to water then we can call it cohesion.
When water gets attracted to other substances then we can call it adhesion. In different part of the plants like roots, stem and leaves water reaches there by capillary action and works differently based on adhesion and cohesion property
PLS HELP WILL MARK BRAINLIEST!!!!!!What happens to particles when P waves and S waves pass through them?
P waves twist particles as they pass through materials. S waves cause particles to compress as they pass through materials.
Particles travel in waves as P waves pass through materials. Particles twist and shake as S waves pass through materials.
P waves cause an increase in pressure on particles of materials as they pass through. S waves decrease pressure on the particles of materials as they pass through.
Particles are squeezed together and pushed apart by P waves. Particles slide past each other in a crosswise direction as S waves pass through them.
Answer:
Particles are squeezed together and pushed apart by P waves. Particles slide past each other in a crosswise direction as S waves pass through them.
Answer:
Particles are squeezed together and pushed apart by P waves. Particles slide past each other in a crosswise direction as S waves pass through them.
Explanation:
Just took the test and this was the correct answer.
Why is the equation not the equation of a line of best fit for the data set below?
Age (years)
23
45
39
74
63
52
59
28
35
11
26
49
IQ
76
82
113
111
109
115
101
127
92
123
128
99
A.
The slope of the line is negative, but the data set has a positive correlation.
B.
The slope of the line is positive, but the data set has a negative correlation.
C.
The y-intercept of 107 will not produce a line that "centers" the scatter plot.
D.
The data set has no correlation and cannot be accurately represented with a linear equation.
Answer:
D.
Explanation:
The data set has no correlation and cannot be accurately represented with a linear equation.
there seems to be no relation between the numbers
if you know the x value, you can't really guess what its y value is (no correlation)
PLEASEEEEEEEEE HELPPPPPPPPP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
A person on Earth is looking up at the sky and the moon turns dark.
Which event likely occurred?
A.) lunar eclipse
B.) transit
C.) solar eclipse
D.) earth eclipse
Answer:
Lunar Eclipse
Explanation:
Lunar Eclipse because when the Earth is positioned precisely between the Moon and Sun, Earth's shadow falls upon the surface of the Moon, dimming it.
Correct Answer:
Lunar Eclipse
Explanation:
During a lunar eclipse, the Earth comes between the Moon and the Sun, causing Earth's shadow to fall on the Moon's surface, which dims its brightness.
Remember:
Lunar eclipse - Earth's shadow on the Moon
verified explanation: A person on Earth observing the moon turning dark is likely witnessing a lunar eclipse. During a lunar eclipse, the Earth is positioned directly between the Sun and the Moon, causing the Earth's shadow to fall on the Moon, resulting in it appearing dark. This phenomenon occurs when the Earth, Moon, and Sun are aligned in a specific way. The Moon does not have its own light source, so it appears dark when it is in the Earth's shadow. This is different from a solar eclipse, where the Moon passes between the Earth and the Sun, blocking the Sun's light from reaching the Earth.
What percentage of earths water is unusable fresh water
Answer: All the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things - only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers and swamps.
Answer:
Q) What percentage of Earth’s water is fresh water?
The answer is 3 percent
Explanation:
All plants and animals use the process of cellular respiration to obtain energy from food. Match the correct term with each sentance to fill in the blank
Complete question:
Read each sentence below. Match the correct term with each sentence to fill in the blank.
Cellular respiration begins in the _______________, where glucose is broken down into smaller molecules to produce energy. During the second part of cellular respiration the molecules are broken down further and produce _______________ as a waste product. The second part of cellular respiration requires ________________ in order to function. The second part of cellular respiration takes place in the _______________.1. mitochondria
2. cytoplasm
3. carbon dioxide
4. oxygen
5. glucose
6. water
Explanation:
Cellular respiration begins in the cytoplasm, where glucose is broken down into smaller molecules to produce energy. During the second part of cellular respiration the molecules are broken down further and produce carbon dioxide and water as a waste product. The second part of cellular respiration requires oxygen in order to function. The second part of cellular respiration takes place in the mitochondria .Further Explanation:
overall: C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP
In all eukaryotic cells mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’ or Citric acid cycle via the oxidization of pyruvate( through the process of glycolysis in the cytoplasm).
Oxidative phosphorylation describes a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD. Electrons continue to move down the chain the energy they release is used in pumping protons out of the matrix of the mitochondria.
This forms a gradient where there is a differential in the number of protons on either side of the membrane the protons flow or re-enter the matrix through the enzyme ATP synthase, which makes the energy storage molecules of ATP from the reduction of ADP. At the end of the electron transport, three molecules of oxygen accept electrons and protons to form molecules of water...
Glycolysis: occurs in the cytoplasm 2 molecules of ATP are used to cleave glucose into 2 pyruvates, 4 ATP and 2 electron carrying NADH molecules. (2 ATP are utilized for a net ATP of 2)The Citric acid or Kreb's cycle: in the mitochondrial matrix- 6 molecules of CO2 are produced by combining oxygen and the carbon within pyruvate, 2 ATP oxygen molecules, 8 NADH and 2 FADH2.The electron transport chain, ETC: in the inner mitochondrial membrane, 34 ATP, electrons combine with H+ split from 10 NADH, 4 FADH2, renewing the number of electron acceptors and 3 oxygen; this forms 6 H2O, 10 NAD+, 4 FAD.Learn more about cellular life at brainly.com/question/11259903
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Final answer:
Cellular respiration is a vital process used by both plants and animals to derive energy from organic molecules, such as glucose, produced during photosynthesis. The process involves the conversion of energy into ATP, releasing carbon dioxide and water as byproducts.
Explanation:
The process of cellular respiration is fundamental to both plant and animal life. During photosynthesis, plants use energy from sunlight to create sugars and other organic molecules. These organic compounds are then utilized by both plants and animals to produce energy through cellular respiration.
During this process, oxygen and glucose (a type of sugar) are used to release energy, which is stored in the form of ATP (adenosine triphosphate), while carbon dioxide and water are given off as byproducts. Thus, cellular respiration provides the energy necessary for the functions of living organisms, making it a crucial component of living systems.
Why the nucleus of a sperm cell is different from the nucleus of body cells?
Answer:The sperm is a gamete, which means it is a haploid cell. Thus, the nucleus will contain half the number of chromosomes the other body cells contain.
Explanation:
The difference between the nucleus of a sperm cell and the nucleus of body cells is : The nucleus of the sperm cell contains one set of chromosomes while the body cells contains two sets of chromosomes in its nucleus
The sperm cell ( gamete ) is a haploid cell therefore it contains only one set of chromosomes, in its nucleus while other body cells ( diploid cells ) contain two sets of chromosomes in their nucleus.
For example ; The Somatic cells ( diploid cell ) contains 46 chromosomes in its nucleus while the human sperm cell ( haploid cell ) contains 23 chromosomes in its nucleus.
Hence we can conclude that the difference between the nuclei of sperm cell and body cells is the number of chromosomes they contain
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Which type of gene is most likely to be widely expressed in the body of someone who has superficial scrape?
Missing options in the question:
the gene that controls the production of stem cells
the gene that controls the production of skin cells
the gene that controls the production of red blood cells
the gene that controls the production of cardiac cells
Answer:
B. the gene that controls the production of skin cells
Explanation:
Superficial scrapes are the damages of upper skin layers which could occur due to accidents or sunburning. Upon damaging, body sheds the skin cells and then replaces with new cells. This process thus is governed by the expression of skin related genes.
Answer:
A gene that stimulates and controls the production of white blood cells.
Explanation:
First, it is necessary to know that a gene is a sequence of DNA that has information for the formation of molecules necessary for the body. These molecules can be proteins, cells, enzymes, among other things that are needed at that very moment.
When a person on superficial scratches, the skin cells send a signal that it is necessary to defend the injured part from possible invaders that could harm the organism. At that moment, the genes come into action and are quickly expressed, not all of the organism's genes, but only those that contain information for the production and control of defense cells, the white blood cells, which will prevent invaders from using the scratches as entry into the body and cause damage.
Which can have the most impact on an ecosystem
watasemenes
Watural wees
abundante
volcanice
Answer: Volcanice
Explanation: it distrupt the entire ecosystem whereby leading displacement of organisms and loss of biodiversity as well as causing some organisms to be extinct. it is a natural disaster that causes havoc to the ecosystem.
Yo sup??
the correct answer is option D ie
volcanice
these are great threats to the ecosystems and affect it adversely
Hope this helps
How does dna give us our traits?
Answer:
Each parent passes half of there chromosomes to there child. DNA is passed down to the next generation. We get our traits from our parents, grandparents, and relatives. And a very low percentage of people get there traits from there great great great grandparents.
Natural selection occurs at the organizational level to
Answer:
Ecosystems
Explanation:
plain logic :)
Answer:
its b. population
Explanation:
Question 12 Multiple Choice Worth 4 points)
(03.08 MC)
Andrea works in an office where frequent outbreaks of colds and viruses occur. However, Andrea stays healthy most of the time and rarely misses work. Which is
the most likely explanation for Andrea's health in this environment?
She probably exercises more frequently than her co-workers.
She probably takes antibiotics on a regular basis.
She probably washes her hands frequently and avoids touching her nose or mouth
She has probably already had all the strains of colds and viruses in her office.
Question 13 Multiple Choice Worth 4 points)
Previous Question
Question 1 (Answered)
Next Question
Answer:
She probably washes her hands frequently and avoids touching her nose or mouth
Answer:
She probably washes her hands frequently and avoids touching her nose or mouth .
Explanation:
The flu virus spreads among people in the same way as that of the cold through droplets emitted by sneezing or the patient's cough. Therefore, it is recommended to avoid contact with infected people. If you are sick, avoid large crowds, so as not to spread the virus. It is also possible to become infected by touching surfaces that contain the virus and then bringing your hand to your mouth, nose or eyes. Therefore, it is necessary to wash your hands frequently, for 20 to 30 seconds, using water and soap or alcohol-based gel.
Accordingly, we can say that in Andrea's case, she washes her hands frequently and avoids touching her eyes, mouth and nose. For this reason, she rarely gets the flu.
Part 2: Research one major hurricane, category 4 or greater, from any time period. In two or more complete sentences,
describe the hurricane. Include the name of the hurricane, date, location, and category.
Answer:
Hurricane Willa
Explanation:
Willa Hurricane, was formed in October of 2018. It was a hurricane formed in Mexico`s Pacific coast. It had a speed of 155 mph, just one mph before of being category 5. It moved from San Blas coastline, passing to Mazatlan until las Islas Marias (an ancient prision).
Hope this info is useful.
a. The dependent variable in this investigation is the: (circle the
correct answer) [1]
(1) size of the test tube
(2) time of digestion
(3) amount of stomach fluid
(4) amount of protein digested
(36 POINTS+BRAINLYEST IF CORRECT)
If two animals can reproduce and produce fertile offspring, then they are members of the same ________________.
population
ecosystem
species
community
Answer:
species
Explantion:
Answer:
species
Explanation:
Write your own 1-2 sentences that explains how the following words are related: Traits, Genes. Alleles. Here
Answer:
Except in some viruses, genes are made up of DNA, a complex molecule that codes genetic information for the transmission of inherited traits. Alleles are also genetic sequences, and they too code for the transmission of traits. ... The short answer is that an allele is a variant form of a gene.
Explanation:
It says write your own. I think it would be better for you to make it but here
Answer:
They all include on what you have as a dominant trait.
Explanation:
why would having both polar and nonpolar properties in a protective boundary be advantageous for the cell?
Explanation:
The polar nature of the membrane’s surface can attract polar molecules, where they can later be transported through various mechanisms. Also, the non-polar region of the membrane allows for the movement of small non-polar molecules across the membrane’s interior, while preventing the movement of polar molecules, thus maintaining the cell’s composition of solutes and other substances by limiting their movement.
Further explanation:
Lipids are composed of fatty acids which form the hydrophobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backbone) with up to 36 carbons. Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties i.e. they are amphiphilic. Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds.
Similarly via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid bilayer, this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.
Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins; these allow large molecules called solutes (including essential biomolecules) to cross the membrane.
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