An assumption or concept is given as a hypothesis for the purpose of debating it and testing if it might be true.
What is a hypothesis in a scientific way?In the scientific process, the hypothesis is developed before any pertinent research—aside from a basic background review—has been conducted. You pose a question, research previous studies, and then formulate a hypothesis.
A hypothesis is typically a speculative assertion made solely with the intention of being tested.
In contrast, a theory is a principle that has been developed in an effort to explain phenomena that have previously been supported by evidence. It appears in the titles of several scientifically recognized principles, including big bang theory.
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The small intestine has special structures, called villi, which help absorption of digested food. Which of the following is NOT a feature?
B1. Good blood supply
B2. Impermeable walls
B3. Large surface area
B4. Thin layer of cells
B2) Impermeable walls
Villi together with it's microvilli tremendously increase surface area of absorption. And hence supports effective absorption of nutrients into blood. Villi have permeable membranes . Thus, nutrients can easily get their way through them.
The same DNA strand is analyzed in four species of fish. Two species have more identical nucleotides than the others.
What does this mean?
A.They look more similar in appearance.
B.They are more closely related.
C. They do not share a common ancestor.
D. They are less closely related.
Answer:
It means that they are closely related.
Explanation:
Which
of the following could be considered a reliable source of scientific
information?
Answer: Textbook
Explanation: just took it
The North Atlantic right whale was classified as an endangered species in 2015. A major cause of death for these whales is collisions with shipping vessels. Several measures have been enacted to prevent such collisions in regions with a high abundance of right whales. In 2002 and 2006, shipping vessel lanes were rerouted around some of these regions. In 2008, speed restrictions were placed on the shipping vessels that were permitted to travel through these regions.
The graph below shows the estimated abundance of North Atlantic right whales from 1990 to 2015. The years in which these measures were enacted are marked on the graph.
The data in the graph is best supported by : ( D ) While changes to vessel lanes and speeds may have been beneficial to right whales, additional actions are needed to prevent population declines.
Description from the GraphFrom the data presented in the graph the population of the right whales was favored by the changes in vessels lanes but the population began to decline again in and around 2009 therefore this is evident that additional actions are needed to prevent population declines other than changing vessel routes and placement of speed restrictions.
Hence we can conclude that While changes to vessel lanes and speeds may have been beneficial to right whales, additional actions are needed to prevent population declines.
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Missing part of the question
What conclusion is best supported by the data in the graph?
A. Modifying shipping lanes is the most effective method of encouraging population growth in right whales.
B. Limiting shipping vessel speeds is the most effective method of preventing population decline in right whales.
C. Changes to vessel speeds and lanes have been effective in preventing population
declines in the right whale population, and no further actions are needed.
D. While changes to vessel lanes and speeds may have been beneficial to right
whales, additional actions are needed to prevent population declines.
a) What did scientist Calderón-Garcidueñas find when she performed MRI
scans and autopsies on the brains of children in Mexico City? (3 points)
What is the percent by mass water in calcium chloride hexahydrate?
Answer:
the answer is 3%
It would be 3%.
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___ is a term standing for enlargement of the heart.
Cardiomegaly is a term standing for enlargement of the heart.
What is cardiomegaly?Cardiomegaly is a heart condition that occurs due to blockage of heart blood vessels or viral infections leading to the weakening and enlargement of the heart.
Therefore, cardiomegaly is a term standing for enlargement of the heart.
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Cardiomegaly is the term used for the enlargement of the heart. Details about cardiomegaly can be found below.
What is cardiomegaly?Cardiomegaly also called megalocardia is the condition of having an enlarged heart.
The heart enlarges because of damage to the heart muscle. An enlarged heart can still pump blood normally to a certain point but can get worse and lead to heart failure as time goes on.
Therefore, Cardiomegaly is the term used for the enlargement of the heart.
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During the nitrogen cycle, through which structure are nitrogen compounds first absorb into the plant?.
Answer:
Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers
Answer:
the
Explanation:
If square is dominant over round, what are the phenotypes for the following genotypes?
SS
Ss
ss
Answer:
SS: square Ss: square ss: round
Explanation:
The dominant trait is the capital letter
Bees are commonly found near flowering plants.
(a) Describe how bees help plants to reproduce.
Answer:
bees like flowers because they have pollen in their wings, and it makes them happy, and that’s nice. They make beautiful little things that can be used to make honey.
Explanation:
The foundation of the best honey is flowers and pollen. When they’re all in bloom, it’s a wonder for bees to come to them—not because of their beautiful colours but rather for how much sweetness there is in them. The smell alone makes every person nearby fall in love with bees. The only downside? The flowers die within weeks when exposed to too much pollen. They can only take so many blooms before it becomes too toxic for humans to eat, even if they don’t have to go through the hassle of killing a human to obtain them.
But that doesn’t mean bees hate the sight of flowers.
It has been said that flowers are what make people happy. That they can make anyone smile despite the circumstances. And maybe if people saw more flowers they would be happier? But it doesn't always work like that.
The plants around her garden
Answer:
PollinationExplanation:
In its natural state, the flower is inverted with the standard petal at the bottom. when a heavy insect such as BEE visits the flower, it lands on the standard petal.The Insects follow the nectar guide into the flower.The insect forces its way in between the two wing petals and moves in to collect the nectar.The insect's back forces the keel petal upwards to expose the stigma and anthers. The stigma and anthers brush against the hairy back of the insect. when this happens, some pollen grains from the anther stick to the hairy back of the insect. At the same time, pollen grains on the insect's back (from another flower which the insect had visited earlier) are transformed into a sticky stigma.when the insect leaves the flower, the keel springs back to its original position to enclose the stamen and the stigma again.Refer to Attachment
The majority of the symptoms of tetanus infection are caused by the tetanus toxins, chiefly tetanospasmin. Tetanospasmin is one of the deadliest toxins known; even very small doses (nanograms) can be lethal. It targets the nerves, causing severe muscle spasms. The tetanus vaccine consists of inactivated tetanus toxin; the vaccine is highly effective for preventing tetanus. Inoculation with the tetanus vaccine leads to the production of protective antibodies. How do these antibodies prevent tetanus
Antibodies prevent tetanus as they neutralize the free form of powerful exotoxin produced.
What are antibodies?It should be noted that antibodies are the protective proteins that are produced by the immune system.
In this case, antibodies prevent tetanus as they neutralize the free form of powerful exotoxin produced. This is important to fight the infection.
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This year, druehl, inc. , will produce hot water heaters at its plant in delaware, in order to meet expected global demand. To accomplish this, each laborer at the plant will work hours per month. If the labor productivity at the plant is hot water heaters per labor hour, how many laborers are employed at the plant?.
2400 laborers are employed at the plant in given case.
What do you mean by global demand?The overall demand around the globe for a good or service is called global demand.
N should represent the number of workers engaged at the plant. The total number of heaters made by all employees in an hour is:
watts = 0.15 watts per hour * N
The total number of heaters in a month will be:
heating units = 0.15 * N * 160
This must be 57600 to satisfy the anticipated demand, so:
If we solve for N using 57600 = 0.15 * N * 160, we get:
N = 57600 / (0.15 * 160) = 2400 laborers.
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The CRISPR-Cas9 system can be used to repair a mutant version of a gene in living cells. How does that process occur
The CRISPR-Cas9 system can be used to repair a mutation by recombination of the mutated sequence with a construct containing the normal gene.
What is the CRISPR-Cas9 system?The CRISPR-Cas9 system is a genome editing tool used to correct in vivo genetic mutations in a cell.
The CRISPR-Cas9 system contains a Cas protein that cuts DNA in a specific region of the genome according to a single guide RNA and thus produces desired genetic modifications.
In conclusion, the CRISPR-Cas9 system can be used to repair a mutation by recombination of the mutated sequence with a construct containing the normal gene.
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Explain how the moon causes high and low tides.
Animals help with seed dispersal by (doing what?)
One way animals help with seed dispersal is via digestion,
Is the neurone a cell, tissue or an organ?
Answer:
Cell
Explanation:
Glial cells and neurons are the two types of cells that make up the nervous system. Four tasks are carried out by glial cells, which make up the nervous system's supporting framework: Give the neurons structural support. protect the neurons. A neuron is a specialized, impulse-conducting cell that is the functional unit of the nervous system, consisting of the cell body and its processes, the axon and dendrites. Three components make up neurons (nerve cells), which perform the integration and communication processes. Axon terminals, dendrites, and axons. The cell body, also known as the soma, is their fourth component and is responsible for the fundamental functions of neurons. In the illustration to the right, a "typical" neuron is depicted. The neuron, a specialized cell created to send information to other nerve cells, muscle cells, or gland cells, is the basic functional unit of the brain. Neurons are nervous system cells that communicate information to other nerve, muscle, and gland cells. Axons, dendrites, and a cell body make up the majority of neurons.
Answer:
nerve type of cell
Explanation:
I looked it up
what happens once the neurotransmitters are released into the synapse?
Once, neurotransmitters are released into a synapse, an action potential is generated in the postsynaptic neuron.
What are neurotransmitters?Neurotransmitters are molecules which produce a nervous impulse when they are released into the junction of two nerves called a synapse.
Some examples of neurotransmitters are acetylcholine and dopamine.
Once, neurotransmitters are released into a synapse, an action potential is generated in the postsynaptic neuron.
Therefore, neurotransmitters are important in neuronal impulse transmission.
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What stimulates the secretion of parathyroid hormone from the parathyroid gland?.
Answer:
Low calcium levels in the blood
Explanation:
In primary hyperparathyroidism, one or more of the parathyroid glands is overactive. As a result, the gland makes too much parathyroid hormone (PTH). Too much PTH causes calcium levels in your blood to rise too high, which can lead to health problems such as bone thinning and kidney stones. this will happen if parathyroid hormones got high in human body..
Answer:
Low blood calcium
Explanation:
Which item is a carbon source?
OA. Burning of fossil fuels
OB. Fossil-fuel deposits
O C. Limestone rock formations
OD. Replanting of rain forests
Answer:
A
Explanation:
Burning of fossil fuels
Review 2
A Write True or False for each statement.
1. Red blood cells have no nucleus.
2. While blood cells contain hemoglobin.
3. Amoebas are smaller than bacteria.
4. Plants and animals are multicellular.
5. Cells require water to divide..
6. Water moves across cell membranes by osmosis.
7. White blood cells destroy invading bacteria.
8. Cells that work together are called tissues.
Compare the structure and location of the human large intestine with those of the fetal pig.
The comparison between the structure and location of the human large intestine with those of the fetal pig are as described below.
What are the differences in the hearts?Fetal Pigs usually have large intestines that is located at their left side and is primarily a predominant spiral colon.
However, the human heart is different because it has an ascending colon on the right side that is connected to the descending colon on the left side of our body by the transverse colon.
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Which organelle is responsible for giving plants colors other than green?
vacuole
chloroplast
mitochondria
lysosome
DNA is organized into structures called
microtubules
chromosomes
thylakoid stacks
nuclei
Answer:
chloroplast
chromosome
Explanation:
same
Answer:
Correct answer is vacuole.
Explanation:
Vacuoles containe anthocyanin pigment which makes vacuoles to appear in different colour such as red, blue and purple.
DNA is organized into structures called chromosomes.
Chromosome is made up of DNA tightly coiled many times around protein histone.
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What is the correct order for respiration?
what does the somatic nervous system do ?
According to the research, the somatic nervous system is responsible for transmitting sensory information as well as to the muscles.
What is the somatic nervous system?It is a complex group of nervous structures that is divided into two main groups, these are the Central Nervous System and the Peripheral Nervous System.
It is responsible for transmitting sensory information and sending motor control information to the skeletal muscles.
Therefore, we can conclude that according to the research, the somatic nervous system is responsible for transmitting sensory information as well as to the muscles.
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Monomers are single organic
compounds that can link together to
form larger compounds.
What are the lipid monomers?
A. fatty acids and mitochondria
B. fatty acids and ATP
C. fatty acids and glycerol
D. fatty acids and DNA'
Monomers are molecules of simple structure that compose the polymers. Option C. fatty acids and glycerol.
What are monomers?
Monomers are the basic unit of polymers. When many monomers join through chemical bonds they form a polymer.
There are many types of monomeric molecules. To name a few, we can mention
Monomer Polymer
• Monosaccharide ⇒ Carbohydrates
• Fatty acid ⇒ Lipids
• Amino acid ⇒ Proteins
• Nucleotide ⇒ Nucleic acids
Monomers are organic molecules of reduced molecular mass and relatively simple, defined structure.
Monomers are composed of carbon, oxygen, and hydrogen atoms, which establish covalent bonds.
In the case of lipids, fatty acids and glycerol are the composing monomers.
Lipids have a hydrophilic head composed of glycerol and hydrophobic tails composed of fatty acid chains.
The correct option is C. The lipids monomers are fatty acids and glycerol.
In the attached files you will find the image of a phospholipid.
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Without enzymes, many chemical
reactions would be....
A. slower
B. faster
C. non-spontaneous
D. easier
Which two dog breeds originally come from a canadian province?.
Answer:
Tahltan bear dog, the Canadian Inuit dog,
Explanation:
What is the original purpose of a
quick stimulus and response in
the body?
A. to protect itself and respond quickly to
dangerous situations
B. to learn about the world
C. to evolve the senses
D. to conserve energy and not move as much
Answer:
A
Explanation:
To protect itself and repond quickly to dangerous situation
When a red onion cell is placed in a 5% NaCl solution, the central vacuole will occupy
A) even more of the cell than when it was in water
B) less of the cell than when it was in water
C) the same amount of the cell as when it was in water
Answer:
A=even more of the cell than when it was in water
Answer:
When a red onion cell is placed in a 5% NaCl solution, the central vacuole will occupy
B) less of the cell than when it was in water
This is due to plasmolysis
Explanation:
What is plasmolysis?Plasmolysis is the process in which there is a loss of water from cells when these are placed in a hypertonic solution. The protoplast and vacuole shrinks away from the cell wall.
What is a hypertonic solution?Hypertonic solution is that which has higher concentration of solutes (low water concentration) as compared to inside the cell. As water moves from high conc. to low conc., it moves from inside the cell to outside. Thus, the vacuole pulls away from the cell when placed in a hypertonic solution (5% NaCl).
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Gardeners often use either chemicals or fences to protect their plants from pests. 60 gardeners were asked about their plant protection method and its success. Three of the 13 who used chemicals had pests. Seven of the 47 who used fences had pests. Please answer both questions. i) What percent of gardeners overall had pests
There are 16 percent of farmers that are affected by the pest infestation.
What percent of gardeners overall had pests?
We know that three of the 13 farmers who used chemicals had pests whereas Seven of the 47 farmers who used fences had pests. So in total there are 10 farmers that are affected from pest out of 60 farmers.
So we can conclude that There are 16 percent of farmers that are affected by the pest infestation.
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