Answer:
Only options a reflects the instances with valid experiment or conclusion.
Quality of any experiment depends upon two things reliability and validity. Reliability is measure of regeneration of results every time an experiment is performed under specific conditions.
Validity is measure of accuracy of results of an experiment. It can be check by two ways: internal validity (checks the design of the experiment) and external validity (checks if the conclusion is the real explanation of the phenomenon).
Now, in marine biologist experiment, he concluded the results only after one breeding season. This makes his results unreliable as it might have happened by chance.
Similarly, in cola experiment the taste was only checked by one candidate i.e. Karl. He might have problem in his taste buds. In addition, the temperature of cola can also affects its taste which is not taken care of in the experiment. Hence, it is not the valid experiment.
Similarly. Jeanette could use more plants for her experiment and Robert just followed only one instruction. He didn't perform any experiment.
Only options a (effect of soil pH on pine seedlings) and b (oil pollution's impact on seagull eggs) represent valid experiments due to controlled conditions and the potential for a repeatable setup. The other instances lack proper control, methodology, and objectivity, which are crucial for scientific investigations.
When determining which instances reflect a valid experiment or conclusion, it is essential to consider certain factors such as the control of variables, having a clear hypothesis, and the ability to repeat the test to draw reliable inferences. Here is the analysis for each instance provided:
a. This biology class's experiment maintains constant conditions for pot size, water, and light exposure while varying only the soil pH, providing a good setup for a controlled experiment.
b. The marine biologist has observed a potential correlation between the distance from an oil refinery and the number of eggs hatched in seagull nests, which can be further investigated by controlling additional variables.
c. Karl's conclusion lacks the rigor of a controlled experiment as taste is subjective, and no information is provided about sample size, controls, or blinding procedures. Therefore, it does not represent a valid scientific conclusion.
d. While Jeanette has a hypothesis, her experiment with only two plants and no control group for the non-musical environment is not sufficiently rigorous.
e. Robert's method for reading the ambient temperature is inaccurate, as holding the thermometer under a bright light could increase the reading, invalidating the experiment's validity.
Valid experiments must be designed to isolate variables and be repeatable, allowing for inductive reasoning to confirm hypotheses with substantial data. In the instances given, options a and b appear to be the most valid experiments.
DNA provides the blueprint for the synthesis of proteins. A _______ is a segment of DNA that codes for one particular protein.
A gene is a segment of DNA
Will anxious children grow up to be fearful or relaxed adults? This question most directly highlights the issue of
The questions about whether anxious children grow up to be fearful or relaxed adults highlight stability or change.
The stability-change debate is whether the personality traits that can be seen in a person at birth will remain constant throughout the life span of the person or if it'll change later.
Therefore, the question about whether anxious children grow up to be fearful or relaxed adults relates to the stability-change debate.
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the impact of the automobile on life in the U.S isnt all positive: streetes arent safe for pedestrians,deers and other animals are killed in termendous amounts on roads,and polution from car emissions harns everyone ( fix the paragraph quickest answer gets brainist !!)
The automobile has significantly changed the U.S. in positive ways but also brought many negative consequences, such as air pollution, greenhouse gas emissions, and declining safety for pedestrians and wildlife. Efforts to transition to sustainable transportation include improving vehicle technology, managing travel demand, and encouraging public and non-motorized transit to reduce environmental and health impacts.
The advent of the automobile greatly transformed the United States, bringing about substantial convenience and changes in patterns of living and trade. However, this transformation did not come without its drawbacks. Urbanization has led to traffic congestion, which not only results in reduced productivity and financial loss but also contributes significantly to air pollution and greenhouse gas emissions.
To combat these negative consequences, sustainable transportation solutions are being sought. Such solutions include advancements in vehicle technology, use of low-carbon fuels, travel demand management, and the implementation of intelligent transportation systems. These aim to reduce the impact of our transportation systems on the environment and enhance urban living.
Despite the apparent benefits, continued reliance on automobiles contributes to a car-centric lifestyle, which causes a wide range of environmental and health issues. Among these are safety concerns for pedestrians and wildlife and the loss of green spaces due to urban sprawl. The call for change includes altering our lifestyles to embrace public transport, car-pooling, and non-motorized travel such as biking and walking to foster a cityscape that supports healthy living and mitigates traffic and pollution issues.
Therefore, urbanization and reliance on automobiles have led to traffic congestion, air pollution, and health risks. Sustainable transportation solutions are crucial for a healthier, greener future.
If a cat has 38 chromosomes in each of its body cells, how many chromosomes will be in each daughter cell after mitosis? A. 19 b. 76 c. 11 d. 38
Answer:
The answer is d)38 chromosomes in each daughter cell.
Explanation:
The answer is very simple. Remember that "Mitosis" is the process where a cell divides once and forms 2 identical cells that are exactly the same as the original. In the process the sequence of each chromosome is duplicated and then contained in a separated nucleus each. At the end each nucleus separates with the exact same information and concludes mitosis.
The polarity of water describes the unequal sharing of electrons. What can you expect to find in a water molecule?
A ionic bonds
B negative charges only
C partial positive and negative charges
D positive charges only
your answer is A ionic bonds
(02.03 HC) Studies have shown that some medications can damage mitochondria. Which of the following would you predict to be the most likely long-term effect on an organism with damaged mitochondria?
A. Proteins would not be modified after being synthesized, and the organism would be unable to grow.
B. The organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.
C. Substances would not be able to enter or leave the cells of the organism, and affected cells would eventually burst.
D. Errors would be made during DNA replication, and the organism would be more likely to develop cancer.
B. The organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.
Please Answer The Question Below
1.) is circulatory system. An easy way to remember this is, blood circulates throughout the body, CIRCULatory.
2.) Circulatory; resspiratory.
HOpe i could help and this got to you in time! :)
I believe the first question is #4 circulatory system, number 2 is also #4 circulatory; respiratory.
Hope this helped! have yourself a great day!
What is the most effective long-term solution to reduce the amount of carbon dioxide emissions?
To help reduce amount of CO2 emissions you could start by:
Walking or cycling to near distances instead of driving. It could be a win-win, you saving money on gas and helping the planet. By walking it'll help us stay active especially for lazy people "me." Recyling and reusing house hold items is another stradegy. Throwing any cans, news papers, plastic bottles, or cardboard objects into a recyling bin will help by reducing the amount of garbage getting tossed in waste lands.
Final answer:
The most effective long-term solution to reduce carbon dioxide emissions includes using less energy, switching to renewable energy sources, reforesting and preserving forests, and investing in carbon capture technologies, with a goal to reach net zero emissions by 2050.
Explanation:
The most effective long-term solution for reducing the amount of carbon dioxide emissions involves multiple strategies. Primarily, changing energy consumption habits is crucial; this includes using less energy overall and opting for more fuel-efficient cars. Additionally, transitioning to low-carbon energy sources, such as solar and wind energy, will significantly reduce emissions. Enhancing natural CO2 sinks, like forests, and investing in reforestation and preservation efforts are also essential. Furthermore, innovative technologies for carbon capture and sequestration, including direct air capture and capturing emissions from smokestacks, are vital to moving toward net-zero emissions. The urgency of these efforts is underscored by scientific recommendations to reach net zero by 2050 or sooner to prevent the worst impacts of climate change.
what are the cellular organelles
Eukaryotic and prokaryotic cells contain many membrane-bounded structures in them that are assigned to perform specialized functions for the normal activity of the cells. These structures are called organelles.
ExplanationThe eukaryotic cell contains many organelles like endoplasmic reticulum (smooth and rough endoplasmic reticulum), ribosomes, Golgi apparatus and the most important, the nucleus.
Each of these has their particular role and the roles of all these collectively lead to the survival and normal functioning of the cell.
How does the small size of a spore help its function?
a) Spores can travel far.
b) Spores provide structure.
c) Spores fit into a cell.
d) Spores are specialized.
Answer:
Spores can travel far.
Explanation:
Spores are carried by the wind or on animal fur.
The cell part that contains instructions for how the cell should work. Also contains instructions for making proteins
That would be the nucleus where the DNA is stored. The DNA has all of the information for how the cell works including all the instructions for making all of the proteins of a cell.
Which statement accurately describes asexual reproduction? It always involves two parents. It is the type of reproduction most common to animals. It produces genetically different offspring. It produces offspring that are genetically identical to the parent
Answer:
D.) It produces offspring that are genetically identical to the parent.
Explanation:
Edg 2021 I got it correct
!!!!!!!!!!!!!! Please help with this:
Cameron was given the following series of observations. Which represents a theory?
Rocks are found on the ocean floor.
Rocks can form volcanoes.
Rocks break down over time.
Certain types of rocks form deep inside Earth.
**It is not C or D, I really don't understand this question. I don't have the question anymore because the last time I reset my quiz it wasn't one of the ten but I still want to know the explanation
Answer:
Rocks can form volcanoes.
Explanation:
Every scientific theory begins as a hypothesis. A scientific hypothesis is a suggested solution to an unexplained occurrence that does not fit with a currently accepted scientific theory. For the options given in the question, the hypothesis would be "Rocks can form volcanoes." In other words a hypothesis is an idea that has not yet been proven. If enough evidence accumulates to support a hypothesis, it goes to the next step - known as theory - in the scientific method and becomes accepted as a valid explanation of a phenomenon.
At some point all chordates get a flexible rod in there back called
notochord i think
im sorry if its wrong
Krebs cycle produces all of the following chemicals except:
A) NADH
B) ATP
C) oxygen
Question 27
Krebs cycle occurs in the ___ of a eukaryotic cell
A) matrix of the mitochondrion
B) cristae membranes of the mitochondrion
C) nucleus
D) cytoplasm
13C and 14C are isotopes of 12C, which has 6 electrons, 6 protons, and 6 neutrons. What is the arrangement of subatomic particles in 14C? A. 6 electrons, 7 protons, and 6 neutrons B. 6 electrons, 7 protons, and 8 neutrons C. 6 electrons, 6 protons, and 8 neutrons
Final answer:
The isotope 14C contains 6 electrons, 6 protons, and 8 neutrons, which gives it a mass number of 14.
Explanation:
The arrangement of subatomic particles in 14C is 6 electrons, 6 protons, and 8 neutrons. This configuration is because the number of protons (which is equal to the number of electrons in a neutral atom) determines the element, and that number is 6 for carbon. The mass number of an isotope is the sum of its protons and neutrons. Since 14C has a mass number of 14, and we know there are 6 protons, there must be 8 neutrons (14 - 6 = 8). Thus, the correct answer is C: 6 electrons, 6 protons, and 8 neutrons.
Each year when a child sees their doctor for their annual check up one of the first things the nurse does is weigh them and measure their height. What life process is the nurse assessing?
A) digestion
B) excretion
C) growth
D) respiration
The answer is C) Growth.
The answer is growth because, when you go to a doctor the measure you hight to make sure you on track and your growing properly. So doctors make a chart of how much you've grown over the year.
Doctor's looks at you chart when you visit them yearly, they do this to make sure you don't have any problems with your bones or if your just a late bloomer when it comes to growning..
if a cell cannot move enough material through its membrane to survive, then the ratio of its surface area to volume is A. too large B. just the right size C. too small D. growing too quickly
The ratio of a cell's surface area to volume is pivotal for its survival. As a cell grows, this ratio decreases, limiting the cell's ability to transport nutrients and eliminate waste, implying that the cell's surface area to volume is too small. Hence, cells must remain small or develop adaptations for more efficient material exchange.
Explanation:If a cell cannot move enough material through its membrane to survive, then the ratio of its surface area to volume is too small. A cell's surface area-to-volume ratio is crucial for its survival. As a cell increases in size, this ratio decreases, meaning the plasma membrane may not have enough surface area to support the diffusion required for the cell's increased volume. This can, therefore, limit the ability of the cell to effectively procure nutrients and eliminate waste through diffusion.
For instance, consider a cell shaped like a sphere, where its surface area increases as the square of its radius, but its volume increases much more rapidly, as the cube of its radius. As the cell grows, it becomes less efficient due to this decreased surface area-to-volume ratio. In order to become more efficient, the cell may either divide, hence producing cells with a better surface area-to-volume ratio, or develop organelles to perform specific tasks.
Ultimately, a cell's size is limited by the rate of diffusion across its membrane, and the efficiency with which it can transport nutrients and wastes. Thus, cells must either remain small or adopt adaptations to increase the efficiency of materials exchange.
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How are hydrogen bonds different from covalent bonds?
A) The atoms in hydrogen bonds have valence electrons
B) The compounds that result from hydrogen bonds contains carbon
C)Covalent bonds are organic
D) Hydrogen bonds are weaker than covalent bonds and form between partially charged atoms or molecules
Answer is D) Hydrogen bonds are weaker than covalent bonds and form between partially charged atoms or molecules
Language, logic operations, and reading are all tasks primarily associated with the __________. A. cerebral cortex B. right hemisphere C. corpus callosum D. left hemisphere
The primary sections in the brain that allow us to read, write, and speak communicably are: the left frontal cortex or Borca's Area, the posterior part of the temporal lobe or Wernicke's Area and a bundle of nerves called the arcuate fasciculus (3).
Answer: Option D left hemisphere
Explanation:
The left side of the brain is responsible for several functions such as :
Analytic thoughtLogicLanguageScience and math calculations and reasoningNumerical skillsWritten skillsControlling the right side of the bodyReading and interpretingThus, Language, logic operations and reading tasks are performed by the left hemisphere.
Which is the MOST accurate description about how green plants and animals get food?
One question is this supposed to be multiple choice?
This probably wont be the MOST accurate but this is the knowledge of a 6th grader (i tried)
Plants get their food from photosynthesising, they get their energy ffrom the sun and the chlorophyll is what capturers the suns energy. And once the suns energy has been caught then the electrons move around almost like they are excited to get the energy from the sun (the way some people get excited after consuming sugar a.k.a getting hyper) And the electrons are "jumping" in the thylakoid membrane. now there is enough energy to drive to the 2nd phase.
ADP becomes ATP that is when it is gaining more phosphate. Then the NADP gets more hydrogen to be able to store the energy now it has the hydrogen so it becomes.....NADPH. That is also kind of phase 3 the Calvin Cycle where G3P goes on to make glucose.
An animal gets energy from consuming the plants or other animals and sometimes even eating their own kind. Animals like deer, rabbits, moneys, pandas they all eat plants and or fruits. Because they get their energy from the plants and as said before that the plants get it from the sun. So basically all kinds of animals depend on the plants but some ocean creature dont really depend on plants but in some ways they do. Because not only for food, but for oxygen.
As you may have noticed i kinda know more about plants but soon i will be learning about animals since we are still learning about eukaryotic organisnisms.
Hope this helps. And have a great day! :)
Select all of the following that are true about rain that falls on deserts:
It soaks deep into parched ground.
It runs off the ground.
It is evaporated quickly because of dry air.
Most deserts receive over 30 inches of rain.
If anyone is reading this in the future the correct answers are:
2. It runs off the ground
and
3. It is evaporated quickly because of dry air
Just trying to help as this data becomes more scarce
Final answer:
Deserts typically receive less than 10 inches of rain annually, much of which is rapidly evaporated due to the dry air and heat, while some contributes to runoff or is used by plants.
Explanation:
In deserts, the limited rainfall experiences multiple fates. Unfortunately, the statement that most deserts receive over 30 inches of rain is incorrect. In reality, the annual rainfall in deserts typically is less than 10 inches (25 cm), often much lower. When it does rain, some water is used by plants, some of it may soak deep into the ground, though typically not very deep due to the parched conditions, and a portion can contribute to runoff. However, given the dry air and heat characteristic of desert climates, much of the rain is rapidly evaporated before it can significantly penetrate the soil.
What keeps Earth’s core from melting? Temperatures not high enough to reach the melting point Radioactive elements breaking up constantly Extreme high pressure from the weight of the layers of rock above it Magnetic force from rotation of the core
The answer is " extreme high pressure from the weight of the layers of rock above it" I just did this one, and this one is correct!! In short, your answer is C! Hope I helped ya!
Answer:
extreme high pressure from the weight of the layers of rock above it"
Explanation:
This is the liquid. Within living cells. . It is important because it helps materials to spread through the cell
Easy just get some water and get a cup and pow
Which event happened first in Earth’s evolution on the geologic time scale?
Energy from collisions melted materials that became Earth’s core.
The Sun released a strong burst that destroyed the first atmosphere.
A ball of dust, ice, and rock was pulled together by gravity.
Dense materials hardened to form the crust and mantle.
Answer:
c is the answer and it is right because i had the answer and it is right
Explanation
The earliest event in Earth's evolution was the accretion of a ball of dust, ice, and rock by gravity, before any differentiation of the core, mantle, or crust occurred, and before the loss of the first atmosphere. The correct option is: A ball of dust, ice, and rock was pulled together by gravity.
The earliest event in Earth's evolution on the geologic time scale was when a ball of dust, ice, and rock was pulled together by gravity. This process is known as accretion, which led to the formation of the early Earth, initially presenting a homogenous composition. As the planet grew, it was subject to intense heating due to radioactive decay, collisions with other space bodies, and gravitational compression, which caused the entire planet to melt.
This melting allowed for the differentiation of Earth's layers, as heavier materials like iron sank to form the core, and lighter materials rose towards the surface to form the crust and mantle. These events occurred before the first atmosphere was destroyed by a solar burst and before dense materials hardened to form Earth's distinct geological layers.
for biologists, what does the term evolution imply when describing the work out Charles Darwin?
Answer:
the anwser is (THAT LIFE CHANGES OVER TIME)
Explanation:
I came on here looking for the anwser but I don't see A B C or D and what they said above me is not helping anybody at all '_'
What are the cell structures that are found in both a bacterial cell and an animal cell?
Structures that are common in animal and bacterial cell :
Cytoplasm : Gel-like matrix composed of water, enzymes, nutrients, wastes.Ribosomes.Chromosome ( nucleic acid DNA ). Plasmids.Cytoplasmic membrane.Both bacterial cells and animal cells contain common structures, including the plasma membrane, cytoplasm, genetic material (DNA and RNA), and ribosomes. These elements play crucial roles in the basic life functions of cells.
Explanation:The cell structures that are found in both a bacterial cell (prokaryotic) and an animal cell (eukaryotic) include the plasma membrane, cytoplasm, genetic material (DNA and RNA), and ribosomes. The plasma membrane functions as a barrier for the cell and separates the cell from its environment. The cytoplasm is a jelly-like substance inside the cell. Genetic material, which can be in the form of DNA or RNA, is the cell's hereditary information. Ribosomes are responsible for protein synthesis.
Bacterial cells come in various shapes, including cocci (spherical), bacilli (rod-shaped), and spirilli (spiral-shaped), but these shapes aren't related to their structural similarity with animal cells. It's important to note that while these structures are common to both cell types, their detailed makeup and the organization within the cell can differ.
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which words are missing from the diagram
1. A) Chlorophyll B) ATP
2. A) NADPH. B) Sunlight
3. A) Chlorophyll B) Water
4. A) Oxygen. B) ATP
PLZ HELP
which of the following accurately describes the way in which a muscle moves?
A. No ATP is needed is the contraction of a muscle.
B. During contraction, cross-bridges pull the myosin to the center of the sarcomere.
C. Interaction and attachment between myosin and actin cause a muscle fiber to relax.
D. When actin filaments are pulled toward the center of the sacomere, the fiber shortens.
PLEASE HELP!! 20 Points!
Describe and provide examples of passive and active transport across a cell membrane. And How do active and passive transport benefit the cell?
Similarities:
Both involve ion movement. Both use ion channels to move ions across the cell membrane, in or out of the cell.
Differences:
Passive Transport (or Diffusion) moves ions from high concentration to low, using no metabolic energy. Active Transport moves ions from low concentration to high, using metabolic energy in the form of ATP. Active Transport uses an ion pump (or Sodium/Potassium pump) to move 3 sodium ions out of the cell and 2 potassium ions in to the cell through the energy of 1 ATP molecule.
In active transport particles move against a concentration gradient and therefore require energy which must be supplied by the cell. Carrier proteins that are found in the cell membrane of cells use energy to transport molecules or ions across the membrane, against the concentration gradient.
Passive transport is a naturally-occurring phenomenon and does not require the cell to exert any of its energy to accomplish the movement. In passive transport, substances move from an area of higher concentration to an area of lower concentration.