N an experiment, suppose that the wings of fruit flies were clipped short for fifty generations. The fifty-first generation emerged with normal-length wings. This observation would tend to disprove the idea that evolution is based on
a. inheritance of natural variations
b. inheritance of acquired characteristics
c. natural selection
d. survival of the fittest
Inheritance of acquired characteristics. Thus, option "B" is correct.
What is inheritance of acquired characteristics?For fifty generations wings of fruit flies were clipped. Hence they acquired this trait in their lifetime and not genetically. If acquired characteristics were capable of passing on to next generation, 50 generations would have been enough to inculcate this clipped wing trait in fruit flies. Despite it, the fifty-first generation did not have clipped wings.
Hence evolution can not occur without genetic variation. A character simply acquired in a lifetime does not create a difference in germ cells and hence is not enough to be passed on to next generation or cause evolution
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Which endocrine hormone promotes the release of glucose from the liver and into the bloodstream?
Glucagon triggers your liver to convert stored glucose (glycogen) into a usable form and then release it into your bloodstream.
What is glucagon?The pancreatic alpha cells that produce glucagon are peptide hormones. It is thought to be the body's primary catabolic hormone since it increases blood levels of glucose and fatty acids. Additionally, it is prescribed as medicine to treat a variety of medical ailments.
When the blood glucose level is too low, the pancreas produces glucagon. Glycogenolysis—the process by which the liver releases glucose into the bloodstream—is triggered by glucagon and occurs in the liver. On the other hand, high blood sugar levels encourage the production of insulin. Insulin-dependent tissues can absorb and utilize glucose with the help of insulin. As a result, the feedback mechanism that maintains steady blood glucose levels includes both glucagon and insulin. Energy expenditure is increased by glucagon, which is higher during stressful situations. The secretin family of hormones includes glucagon.
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TLloyd’s lab partner is looking down into a test tube while he heats the contents by using a flame. Which action should Lloyd recommend to his partner if heating must continue?
Wear safety goggles while looking into the opening of the test tube.
Cover the opening of the test tube so that no materials can boil out of it.
Move the test tube so that the opening is pointing away from all students.
Put the test tube in a hot water bath so that no water can enter its opening.
The action that should be recommended by Lloyd to his partner if the heating must continue is to move the test tube so that the opening is pointing away from all students. Thus, the correct option is C.
What are the precautions that should be taken while heating the solution?Safety and security are the foremost things that you should be required to keep in mind when performing lab experiments. You should be well aware of all its parameters.
While heating the solution, always keep away your face away from the direct opening of the test tubes, wear goggles if required, etc.
Therefore, the action that should be recommended by Lloyd to his partner if the heating must continue is to move the test tube so that the opening is pointing away from all students. Thus, the correct option is C.
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Which substance is an example of organic matter?
an example of organic matter is sugar because it is the best option
Question 4 of 10
How do bacteria develop resistance to drugs?
10 Points
A. After a certain amount of the bacteria are killed by drugs, they learn to recognize and avoid it.
B. Their ability to replicate very fast and natural mutations combine to allow them to evolve rapidly.
OC. If they only absorb a small amount, it works like a vaccine, immunizing them against larger amounts.
OD. If you do not take all of your antibiotics, they slowly develop a tolerance for it, like you would against certain toxins over time.
Reset Selection
Answer:
A is your correct answer.
Answer:
A
Explanation:
I need help with this please :(!
Answer:
A=fish. b=salamander c=tortoise d=chicken e=rabbit f=human
Explanation:
different fetuses look different ways for each species
Answer:
F is human-C is chicken-B is salamander-E is Tortoise-A is fish -D is rabbit
Explanation:
Which statement best explains why the development of a new area of science can lead to changes in a theory? A.A new area of science attracts new scientists who study old theories for flaws. B.A new area of science promotes experimentation from a different point of view. C.A new area of science allows old theories to be reworded using new terminology. D.A new area of science encourages scientists to replace old theories with modern ones.
A new area of science promotes experimentation from a different point of view. thus option B is correct.
What is the role of science in daily life?Cooking, eating, breathing, driving, playing, and other activities all include science. Everything we use and wear, including our brushes, toothpaste, shampoo, talcum powder, and body oils, is a result of scientific innovation. Without all of this, life is inconceivable since it has become essential.
Because everything else explains why a new field of science is developing, which might improve an existing theory but isn't precisely the "best" one, it encourages experimentation from a different angle.
Therefore, option B is most likely your outcome.
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PLEASEEEE HELPPPP :))
Describe the process of food moving through the digestive tract from mouth to anus. Include in your description the specific functions of at least 3 structures that are part of the process.
The process of food moving through the digestive tract, from the mouth to the anus, involves several structures and stages.
The description of the process:
1. Mouth: Functions of the mouth include:
Mechanical digestion: The teeth break down food into smaller pieces through chewing and grinding, increasing the surface area for further digestion.Chemical digestion: Salivary glands secrete saliva, which contains enzymes like amylase that begin the breakdown of carbohydrates into simpler sugars.Formation of the bolus: The tongue helps mix food with saliva to form a moistened mass called a bolus, which can be easily swallowed.2. Esophagus:
After being chewed and mixed with saliva, the bolus moves down the esophagus, a muscular tube connecting the mouth to the stomach. The main function of the esophagus is to transport food from the mouth to the stomach using peristalsis.3. Stomach: The stomach performs several important functions:
Mechanical digestion: The stomach muscles contract and mix the food with gastric juices, breaking it down further into a semi-liquid mixture called chyme.Chemical digestion: Gastric juices, including hydrochloric acid and enzymes like pepsin, are secreted in the stomach. They help break down proteins into smaller peptides.4. Small Intestine:
The majority of digestion and nutrient absorption occurs in the small intestine. Enzymatic digestion: The walls of the small intestine produce various enzymes, along with enzymes from the pancreas and bile from the liver.Nutrient absorption: The inner lining of the small intestine contains numerous finger-like projections called villi, which greatly increase the surface area for nutrient absorption. Secretion and reabsorption: The small intestine secretes mucus to protect its lining and reabsorbs some water and electrolytes.5. Large Intestine (Colon):
Absorption of water and electrolytes: The large intestine absorbs water and electrolytes from the remaining material, making the waste material more solid and forming feces.Bacterial fermentation: Beneficial bacteria in the large intestine ferment certain fibers and produce vitamins, such as vitamin K and some B vitamins.Formation and elimination of feces: The large intestine compacts the waste material into feces and stores it until it is eliminated through the anus during a bowel movement.Thus, food passes through a number of structures and stages as it moves from the mouth to the anus in the digestive system.
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b) Review the results of your table and summarize your observations about
how the different substances cross membranes. (2 points)
Substances can enter and exit the cell through the membrane through passive or active transport. The processes of endocytosis and exocytosis ensure, respectively, the entry and exit of macromolecules and other particles.
In which two ways do substances cross the membrane?The selective passage of substances across the membrane occurs in two different ways:
active transport, when it involves the use of energy.passive transport, when it does not involve the use of ATP.With this information, we can conclude that substances can enter and exit the cell through the membrane through passive or active transport. The processes of endocytosis and exocytosis ensure, respectively, the entry and exit of macromolecules and other particles.
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How can you explain/describe the inheritance the trait of armor? How might this challenge our understanding of dominance?
These explain/describe the inheritance the trait of armor might this challenge our understanding of dominance by The developments are encoded with the aid of using one-of-a-kind alleles of the identical gene.
What are traits?Traits are bodily determined functions of an organism. Each allele is chargeable for a selected phenotype that makes up a trait. A dominant trait is the only one that is expressed over any other in a heterozygous kingdom i.e. the mixed kingdom of the 2 one-of-a-kind alleles that encodes the 2 one of kind developments respectively.
When the 2 one of a kind alleles integrate withinside the organism's genotype, the dominant trait (hornless) will specific itself over its contrasting trait (horn),The allele that encodes hornless-ness is stated to be the dominant allele at the same time as hornless-ness is the dominant trait.
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Did the amount of water that condensed at the top of the terrarium change as plants sprouted and grew? described what you observed, using data from your experiment. why do you think this happened ?
The amount of water that condensed at the top of the terrarium change as plants sprouted and grew because water, oxygen and nutrients are very essential elements for growth.
The plant cells grow in size by cell enlargement which in turn requires water. Turgidity of cells helps in extension growth. Thus, plant growth and further development is intimately linked to the water status of the plant. Water also provides the medium for enzymatic activities needed for growth. Oxygen helps in releasing metabolic energy essential for growth activities. Nutrients (macro and micro essential elements) are required by plants for the synthesis of protoplasm and act as source of energy.
Thus as plant grows it needs more water to provide to it's larger plant body and which causes decrease in the amount of water that condensed at the top of the terrarium.
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The first step of the scientific method usually involves _______.
Multiple Choice
a. gathering data
b. developing a hypothesis
c. identifying relationships between variables
d. making observations
Answer:
b. developing a hypothesis
The first step of the scientific method usually involves making observations. Therefore option D is correct.
Observations are systematic and objective observations of the natural world. Scientists use their senses or specialized tools to collect data and gather information about a particular phenomenon or problem.
These observations serve as the foundation for scientific inquiry and help researchers identify patterns, trends, or potential relationships between variables.
From these initial observations, scientists can then move on to formulating a hypothesis (b), which is a testable explanation or prediction based on existing knowledge and observations.
The scientific method guides researchers in a structured approach to understanding the natural world and conducting experiments to test their ideas.
Therefore option D is correct.
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In a quadrat that is 0.5m along each side, you count 3 daisy
plants and 25 grass plants. The whole lawn you are sampling
is 5m long and 4m wide. Calculate the number of daisy plants
and grass plants in the whole lawn. Show your working
clearly.
Answer:
Interdependence is a key concept in ecology. Whilst this can be taught theoretically, some practical fieldwork greatly enhances pupils’ understanding. Almost certainly the fieldwork would entail looking at plant abundance and distribution and, of course, some work with quadrats!
A quadrat is a simple device for marking out a small area. For young children at primary school the quadrat is often a convenient way of focusing a pupil’s attention on a particular small area. At secondary level, pupils should understand how quadrats can be used to sample a larger area. By recording information from a number of quadrats placed within a larger study area, they can obtain a representative sample of the whole area, which may be too big to describe in full.
This article describes how quadrats can be used to help pupils at lower secondary level estimate the relative abundance of plant species. All the information given here refers to frame quadrats. (Point quadrats can be tedious and difficult for pupils to use and are probably best avoided at this level.
Some flowers have both male and female parts. With itself as the only parent, one of these flowers can still create offspring, this process is called ____
Describe the hearing process
So to put this in a question, I would rephrase it to:
How does hearing work?
It's a little tough to ELI5 without using using the names of the particular organs but here goes:
Sound is nothing more than a wave of air pressure. In other words, it fundamentally involves changing degrees of energy-based air pushing and tugging. Additionally, it is because to this that sound cannot travel in a vacuum. When these waves reach your ear, they first come into contact with the "tympanic membrane," which vibrates and transmits these vibrations to the malleus, incus, and stapes, three small bones (Latin for hammer, anvil, and stirrup).
The waves will subsequently be transmitted via the bones' vibrations to the "cochlea," a spiral-shaped organ filled with fluid. The air pressure wave has so undergone many transformations at this point. Air pressure was followed by mechanical vibrations and is now "fluid pressure." The spiral-shaped cochlea is lined with neurons all the way around. Depending on the fluid pressure waves' intensity, frequency, etc., the cochlea will have to travel a particular distance. Based on these fluid waves, these neurons will then activate, sending information to your brain.
Your brain then decodes these messages to produce the "sound" that you hear. Although I'm not convinced this is the greatest ELI5, this is the main idea.
In essence, your ear works as follows:
Air pressure waves enter the ear, transform into mechanical vibrations, transform into fluid pressure waves, which signal neurons and cause those neurons to fire electrical impulses that communicate with the brain the sound you are hearing.
Cheers,
ROR
Answer:
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. These bones are called the malleus, incus, and stapes.
hy Sophie pl z mark me as brainlist ✌ xd
Select all the correct answers.
This chart presents data on greenhouse gas emissions caused by human activity from 1990 to 2012. Which questions would help clarify this
evidence?
Emissions (million metric tons of
carbon dioxide equivalents)
8,000
6,000
4,000
2,000
1990
U.S. Greenhouse Gas Emissions
by Economic Sector, 1990-2013
1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012
Year
Industry
Electricity generation
Residential
Transportation
Agriculture
Commercial
The correct question is what caused the dip in greenhouse emission in transportation after 2007 and is denoted as option E.
What is a Graph?This is defined as a pictorial representation of data or variables in an organized manner.
From the graph, we can infer that there was a decrease in greenhouse emission from year 2007.
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question in the picture !:)
Answer:
The membrane that covers the lungs is called the pleura :)
Explanation:
When you dissolve both compounds in water which form of each going to predominate in the solution?
Answer:
nu știu nu vreau nu pot sczzzz
I had this question for SBI4U
Answer:
h+ is the part of the rocket that goes and blasts off.
question is in the picture :)
Answer:
adrenal gland - thyroid
Explanation:
what the incorrectly paired matches should be:
islets of Langerhans - pancreatic cells; pituitary in brain/endocrine system
adrenaline - made in adrenal medulla [in center of adrenal gland]
estrogen - made in ovaries
hope this helps!!
You can create alignment in your composition by placing items in a blank way
You can create alignment in your composition by placing items in a linear way.
What is Alignment?Alignment may be characterized as the arrangement of something that is in the appropriate position compared to each other.
Alignment of any objects or things can be effectively done when these items are placed in a linear sequence with definite space between them.
Therefore, it is well described above.
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A student, who is studying two different cells A and B in cell cycle, notices that cell A has 5 picograms of DNA while cell B has 10 picograms of DNA. Both cells are from the same organism. Which of the following is the best description of the cell cycle stage of each cell?
A. Cell A is in prophase of mitosis; Cell B is in metaphase of mitosis.
B. Cell A is in G1 phase; Cell B is in G2 phase.
C. Cell A is in G1 phase; Cell B is in between G1 and S phase.
D. Cell A is in G2 phase; Cell B is in G1 phase.
Answer:
As the cell enters meiosis 1, it's DNA replicates in S phase and then reduces to half when the cell splits into two. Hence, the amount of DNA remains 10 pg.
During meiosis 2, there is no DNA replication but only division between cells, leading to 5 pg of DNA in all four daughter cells.
So, the correct option is '10 pg and 5 pg respectively'
the picture holds the question
The experiment done in Miller-Urey experiment describes that the organic molecule have always existed as well as life on Earth could have originated from inorganic material. The correct options are A and D.
What are organic molecules?An organic molecule is a complex molecule that is primarily made of carbon atoms bonded with other elements and/or other carbon atoms. All living things on Earth are composed of organic molecules.
The experiment done in Miller-Urey experiment describes that the organic molecule have always existed as well as life on Earth could have originated from inorganic material.
Thus, the correct options are A and D.
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what is the result of hydrogenation of vegetable oils
Answer:
Explanation:
Since the process of hydrogenation contributes hydrogen atoms to oil, this will reduce the amount of fatty acids and increase the amount of saturated fatty acids in the oil.
how to make I love my pet animal in negative sentence
Answer:
I never love my pet.
Explanation:
Hope it helped!
Answer:
I don't love my pet . easy
An object moving at a constant velocity will always have a
negative displacement
negative acceleration
zero acceleration
zero displacement
Answer:
zero acceleration
Explanation:
hope I helped
Answer:
zero acceleration
Explanation:
I have it confirmed
hope it helps :-)
What do scientists call a disease caused by a pathogen that is easily passed between people?
Infectious diseases are caused by microorganisms like viruses, bacteria, fungi, or parasites and can spread from person to person.
What are pathogens?A pathogen is an organism that causes disease in its host, and the severity of the disease symptoms is referred to as virulence.
Infectious diseases are caused by microorganisms like viruses, bacteria, fungi, or parasites and can spread from person to person.
Thus, the disease that scientists call caused by a pathogen that is easily passed between people is infectious diseases.
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let's suppose the number of frogs is too much in pond. what kind of imbalance can be observed
Frogs will start devouring fish if there are too many of them in the pond and not enough food sources for them.
What is pond ecosystem?A freshwater ecosystem called a pond is made up of groups of species that depend on one another and the surrounding water environment for nutrients and survival.
Garden can take on a new dimension with the addition of a pond or a container planted with aquatic plants like water lilies. Additionally, it might give your property a completely new depth by bringing in a variety of creatures, especially frogs.
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Explain how light brings about tropic movement in
the stem and root of a
flowering plant.
Answer: Photo tropism is the growth-response to light in a plant. Stems exhibit positive photo tropism while most roots exhibit negative photo tropism.
Explanation:
¿What is Kingdom Monera?
Kingdom Monera is a biological kingdom that comprises prokaryotic organisms, which are unicellular and lack a nucleus and other membrane-bound organelles.
Monera is one of the five traditional kingdoms of living organisms, which also include Protista, Fungi, Plantae, and Animalia.
The Monera Kingdom includes bacteria and archaea, and some scientists propose that these groups should be split into two separate kingdoms due to their significant molecular and structural differences.
Bacteria can be found in various environments, including soil, water, and inside animals, and they play an important role in many ecological processes, archaea, on the other hand, are often found in extreme environments, such as hot springs and deep ocean hydrothermal vents.
Which factor is MOST likely to have contributed to the high fertility rate in Africa?
A-many Economic opportunities
B-poor access to medical care
C-high rate of education
D-Lack of access to food
Answer:
The answer is B. Poor access to medical care
Poor access to medical care is most likely to have contributed to the high fertility rate in Africa. Option B is correct.
Fertility rate is the average number of children that a woman will have in her lifetime. In Africa, the fertility rate is high, meaning that women on average have more children than in other parts of the world. There are many factors that contribute to high fertility rates, but one of the most important is poor access to medical care.
When women do not have access to contraception, they are more likely to become pregnant. They are also more likely to die in childbirth if they do not have access to medical care. In many parts of Africa, girls are married off at a young age. This means that they start having children at a young age, which can lead to higher fertility rates.
In some cultures, it is seen as desirable for women to have many children. This can also contribute to high fertility rates. In some parts of Africa, there are few economic opportunities for women. This can make it difficult for women to support themselves and their children, which can lead to higher fertility rates. Option B is correct.
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