The Hypothesis 1 is "The mutation in a regulatory region of the Pitx1 gene that controls advances Pitx1 expression in the spine-forming region during development" and the Hypothesis 2 is that "If the mutation prevents Pitx-1 expression, then no spines will form during development".
The Pitx1 gene encodes a transcription factor that is required for normal development of hindlimbs and some portions of the axial skeleton, including vertebrae and pelvic girdle.
Pitx1 is also involved in the development of the spines in stickleback fish.
Some stickleback fish develop protective spines, and other stickleback fish are spineless.
Spine development is controlled by the expression of the Pitx1 gene.
The spineless phenotype is due to a mutation in Pitx1 that results in no expression of Pitx1 during development in regions where spines would otherwise form.
The mutation is in a regulatory region of the Pitx1 gene that controls advances Pitx1 expression in the spine-forming region during development.
If the mutation prevents Pitx-1 expression, then no spines will form during development.
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Lipoproteins that are formed within the intestinal epithelium to transfer dietary fats into circulation are called:_______
Lipoproteins that are formed within the intestinal epithelium to transfer dietary fats into circulation are called chylomicrons.
Chylomicrons, also known as ultra low-density lipoproteins (ULDL), are lipoprotein particles that are composed primarily of triglycerides (85-92%), phospholipids (6-12%), cholesterol (1-3%), and proteins (1-2%). The term "chylomicron" comes from the Greek words "chylos" (meaning juice (of plants or animals) and "micron" (meaning small particle). They move dietary fats out of the intestines and into other parts of the body. One of the five main categories of lipoproteins (grouped by density) that allow lipids and cholesterol to circulate inside the bloodstream's water-based solution is the ULDLs. ApoB48 is a protein that is unique to chylomicrons.
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how do ocean currents affect climate?
Explain the difference between DNA replication and protein synthesis. When does each process occur? Why does each process occur? Which process happens more often? Explain your reasoning.
Responding to the environment is a charestic of the life best shown by which example
Responding to the environment is a characteristic of the life best shown by a living organism.
What is a Living organism?This is referred to as a biological entity which is capable of transferring genetic traits to its offspring and also undergoes cell division which ensures its body parts grow. They are also involved in the search for food and other types of nutrients for their normal functioning.
Living organisms are able to perform such functions such as the following below:
GrowthIrritabilityMovementReproductionRespirationExcretion etc.Plants and animals possess special structures which enable them respond to different types of stimuli such as heat, cold etc. This enables the body system adjust and adapt thereby increasing the survival chances of the organism.
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based on what you know about natural selection, why might cichlids develop different mouth structures?
As a form of adaptation to new food sources, cichlid fish develop mouths with different shapes. Over time these events led to the formation of new species.
The cichlid fish species in Lake Malawi descend from a common ancestor. When the availability of food in its natural habitat (Lake Tangayika) began to decrease, these fish ancestors began to migrate to Lake Malawi via the Ruhuhu River in search of new food sources. As a form of adaptation to new food sources, cichlid fish develop mouths with different shapes. Over time these events led to the formation of new species.
Cichlids can be found around the world in a variety of different habitats from Asian rivers and streams to African train lakes. These fish come in a wide variety of body sizes, but most of them are compressed or elongated laterally in half the body shape. Cichlids range in size from 1 inch to over 3 feet in length.
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Question 2 of 5
Which statement describes the movement of matter in the rock cycle?
O A. Water gets heated by sunlight and evaporates.
OB. Magma rises to the surface and solidifies.
OC. Living things take in and give off water.
O D. People burn fuels that contain carbon and release CO₂.
Answer:
OC
Explanation:
Magma is molten matter therefore, when magma rises and solidifies it forms solid matter.
The most common type of rock by volume in Earth’s crust is
______________:
A. Metamorphic rock
B. Sedimentary rock
C. Divergent rock
D. Igneous rock
E. Convergent rock
The correct answer is D. Igneous rock.
Igneous rocks are the most common type of rock by volume in Earth's crust. They are formed through the solidification and crystallization of molten magma or lava. Igneous rocks can be classified into two main categories: intrusive igneous rocks and extrusive igneous rocks.
Intrusive igneous rocks form beneath the Earth's surface when molten magma cools and solidifies slowly. Examples of intrusive igneous rocks include granite and diorite. These rocks make up a significant portion of the Earth's crust.
Extrusive igneous rocks, on the other hand, form on the Earth's surface when lava erupts from volcanoes and rapidly cools and solidifies. Examples of extrusive igneous rocks include basalt and rhyolite. While these rocks may cover extensive areas on the Earth's surface, they are less voluminous compared to the intrusive igneous rocks that form beneath the surface.
Metamorphic rocks (A) are formed when existing rocks undergo changes due to high heat, pressure, or chemical processes. Sedimentary rocks (B) are formed from the accumulation and compaction of sediments over time. Divergent rock (C) and convergent rock (E) are not recognized geological terms.
Therefore, the most common type of rock by volume in Earth's crust is igneous rock (D).
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contrast the relative positions of the sun . earth and moon during the full moon phases and the new moon phase
Answer:
During the New Moon the far side of the Moon is illuminated by the Sun, while the side that faces the Earth lies in darkness so the Moon is invisible. ... As the Moon follows its path from the Full Moon position less and less of the Earth-facing side is illuminated resulting in the “waning” phases.
Explanation:
the heart in human consists of dash chambers comprising dash and dash
Answer:
The heart in human consists of 4 chambers comprising two atria and two ventricles.
Answer:
The human heart consists of four chambers
comprising two atria and two ventricles
migration is required for genetic drift to occur. higher rates of migration will increase genetic drift. True or False
What is it called when you make a logical interpretation based on your
observations/research?
Answer:
it is anything but the what u see in the expirment in ur question
The renal system does not play a direct role in regulating which of the following?
A. blood pressure
B. blood temperature
C. blood solute concentrations
D. blood pH
The renal system does not play a direct role in regulating is b. blood temperature
The primary function of the renal system, also known as the urinary system, is to filter waste products from the blood, maintain electrolyte balance, and regulate blood pressure, blood solute concentrations, and blood pH. The kidneys play a crucial role in these functions, filtering the blood and excreting waste through urine production. However, the regulation of blood temperature falls under the responsibility of the thermoregulatory system, which is mainly controlled by the hypothalamus in the brain, this system helps maintain a stable internal body temperature by balancing heat production and heat loss mechanisms.
Some thermoregulatory processes include sweating, vasodilation or vasoconstriction of blood vessels near the skin, and shivering. These mechanisms ensure the body maintains an optimal temperature for proper functioning, while the renal system focuses on other essential tasks related to maintaining homeostasis. So therefore the correct answer is b. blood temperature does not play a direct role in regulating.
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a gram-positive bacillus that has a rod-coccus cycle (short, thin rods in young cultures and cocci in older cultures) and an odor resembling cheese is:
Answer:
Explanation:
Gram-positive bacilli subdivide according to their ability to produce spores. Bacillus and Clostridia are spore-forming rods while Listeria and Corynebacterium are not. Spore forming rods that produce spores can survive in environments for many years.
Cell membranes are made up of a bilayer of phospholipids that are very selective about what substances can pass through.The table below shows the different types of molecules that can enter a cell. It compares the concentration on the outside to the inside of the cell, its relative size, and whether it is polar, nonpolar, or an ion. Determine how each molecule can pass into the cell. Is it by passive transport, active transport, or endocytosis? (3 points)
Answer:
Answer: Oxygen = passive Carbon Dioxide = passive Fructose = Endosytosis glutamine = Active Sodium ion = Active Potassium ion = Active Protein molecule = Passive or Endocytosis
Explanation:
js trynna get points lol
The molecules can pass into the cell by passive transport, active transport, or endocytosis.
Molecule | Concentration Outside | Concentration Inside | Size | Polarity | Transport | Mechanism
Glucose High Low Small Polar Diffusion
Oxygen High Low Small Nonpolar Diffusion
Sodium High Low Small Ion Active transport
Chloride Low High Small Ion Active transport
Amino acids Low High Medium Polar Carrier-mediated transport
Large protein Low High Large Polar Endocytosis
Glucose and oxygen can pass into the cell by diffusion. Diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Glucose and oxygen are both small molecules, and they are both polar. This means that they can dissolve in the phospholipid bilayer of the cell membrane.
Sodium and chloride can pass into the cell by active transport. Active transport is the movement of molecules from an area of low concentration to an area of high concentration. Sodium and chloride are both ions, which means that they are charged particles. This means that they cannot dissolve in the phospholipid bilayer of the cell membrane. Instead, they need to be transported across the membrane by special proteins called ion pumps.
Amino acids can pass into the cell by carrier-mediated transport. Carrier-mediated transport is a type of passive transport that uses carrier proteins to transport molecules across the cell membrane. Amino acids are polar molecules, but they are larger than glucose and oxygen. This means that they cannot simply diffuse across the cell membrane. Instead, they need to be transported across the membrane by carrier proteins.
Large protein can pass into the cell by endocytosis. Endocytosis is a process by which the cell engulfs large molecules or particles. The cell membrane forms a pocket around the molecule or particle, and then the pocket pinches off to form an endocytic vesicle. The endocytic vesicle then fuses with a lysosome, where the molecule or particle is broken down.
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15. The human embryo and all other vertebrate embryos have gill slits. This best supports the idea that
a. Life descended from water
b. Embryos can breathe under water
c. Vertebrates are evolutionarily related
d. Humans become fish before they become human
Answer:
b. is the answer
Explanation:
Which is the best definition for lineage?
A single line showing age.
A continuous line of descent.
A set of parallel lines.
Branching lines showing breaks in descent
Answer:
A continuous line of descent.
Explanation:
A lineage is a descent from the ancestors, is also defined as a sequence or a continuous line of descendants of an individual. They are a subset of the evolutionary tree of life. Just like the subject of geography is arranged into several batches which are descended from the linage of the similar nature of interrelated branches.you also noticed that the organism directs tiny food particles to a groove/opening by the movement of these tiny-hair like structures. based on this observation, is the organism autotrophic or heterotrophic?
The movement of tiny-hair like structures directing tiny food particles to a groove/opening is the process of cilia; and based on this observation, the organism is heterotrophic.
What are Autotrophic organisms?Autotrophic organisms are organisms that produce their own food, which means they generate energy and nutrients from inorganic materials such as sunlight and carbon dioxide. Photosynthesis is an example of autotrophic nutrition. Cyanobacteria, algae, and green plants are all examples of autotrophic organisms.
What are Heterotrophic organisms?Heterotrophic organisms are organisms that rely on other organisms for food. They obtain their food or nutrients from organic compounds in their environment, such as other living things. For example, animals and fungi are heterotrophs that obtain their food by eating other organisms.
In conclusion, based on the observation that the organism directs tiny food particles to a groove/opening by the movement of these tiny-hair like structures, it is a heterotrophic organism since it relies on the ingesting of other organisms for food.
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why did mammals evolved so quickly after the extinction of the dinosaurs
“When the dinosaurs went extinct, access to different foods and environments enabled mammals to flourish and diversify rapidly in their tooth anatomy and evolve larger body size,” said lead author Madelaine Atteberry from the University of Colorado Geological Sciences Department.
The sonographic appearance of choledocholithiasis is best described as. Nonshadowing mobile hyperechoic mass. Mobile hyperechoic focus demonstrating posterior shadowing. Immobile echogenic focus demonstrating a posterior shadow. Mobile hyperechoic focus demonstrating anterior shadowing.
Answer:
Mobile, hyperechoic focus demonstrating posterior shadowing
Explanation:
Cholecystitis can also be regarded as gallbladder inflammation i.e inflammation of a digestive organ which is a small organ beneath the liver. The causes of Cholecystitis is as a result of blocking of tube( cystic duct) that leads the gallbladder all the way to the small intestine, as a result of this Bile can builds up then inflammation will occur. This can be treated through surgery. The features of sonographic oacute cholecystitis are;
✓More than 5mm thickening wall
✓ More than 5cm gallbladder distention
✓sonographic Murphy sign
✓ presence of pericholecystic fluid,
✓ appearance of Gallstones is inform of echogenic foci in the gallbladder.
It should be noted that the sonographic appearance of choledocholithiasis is best described as Mobile, hyperechoic focus demonstrating posterior shadowing.
why do we need to follow the correct procedure in collecting sample
please don't search in Go-ogle
....................0.0
How is the cell cycle important to the processes of mitosis and meiosis
Answer:
Living things need both meiosis and mitosis to function.
In order for the body to grow, mitosis takes place. Mitosis is what causes us to grow from the size of a baby to the size of an adult. The cell creates a copy of itself during mitosis, enabling the organism to grow larger through repeated mitotic divisions. In order to replace damaged or dead cells, mitosis also takes place. Without mitosis, cells cannot be repaired or grown.
Explanation:
Gametes are created during meiosis. Four genetically distinct haploid gametes (eggs or sperm) are created during one round of meiosis. Without meiosis, gametes wouldn't develop and humans wouldn't be able to procreate.
Which best describes the respiratory system?
A: The respiratory system allows for gas exchange, water and heat balance, and production of sound and speech.
B: The respiratory system allows for gas exchange, heat balance, and secretion of hormones.
C: The respiratory system allows for water and heat balance, prevention of disease, and creation of sound and speech.
D:The respiratory system allows for water balance, muscular support, and passage for ingesting food.
Answer:
A
Explanation:
EDGE
Name 3 organelles and provide their functions.
Answer:
Can I get brainiest answer Mitochondria Lysosomes vacuole
What is the Which is the site of the light-dependent reactions of photosynthesis?Source of energy that drives photosynthesis?
Which process do ALL living things do? *
Ophotosynthesis
O cellular respiration
O ventilation
O absorb sunlight
Omake glucose
Photosynthesis -is a process in which plants use to make their food by the help of sunlight
Cellular respiration- means the break down of simple sugars into CO2 and H2O and release energy in the form of ATP . so it takes place in all living things ,in plants and also in animals.
ventilation -means breathing in other word so every living thing doesn't live without breathing .
Absorb sunlight - it is done by plants to make their own food.
Make glucose-plants and animals both use glucose as their main source of energy. The main source of glucose in animals include the diet and process of gluconeogenesis and the primary source in a plants is the process of photosynthesis .
So,cellular respiration , ventilation and make glucose is done by all living things
nullpointerexception and arithmeticexception are both derived from which class?
NullPointerException and ArithmeticException are both derived from the class RuntimeException, which is a subclass of the Exception class in Java.
Null Pointer Exception occurs when a program attempts to use a reference variable that is not initialized or points to null. It is a runtime exception because it is typically caused by a logical error in the code. Arithmetic Exception occurs when an exceptional arithmetic condition arises, such as division by zero or an integer overflow.
It is also a runtime exception as it is caused by an error in the arithmetic logic of the program. Both exceptions being derived from RuntimeException means that they do not need to be explicitly declared in a method's throws clause or caught in a try-catch block. This allows programmers to handle these exceptions in a more flexible and optional manner, as they are usually caused by programming errors rather than external factors.
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Why are ecosystems not considered “closed” systems?
Please help me
As of 2016, how many constellations were recognized by the IAU?
8,002
880
88
180
As of 2016, the IAU had recognized 88 constellations. Option C
This is further explained below.
What is IAU?Generally, In reference to the IAU 1919 marked the beginning of operations for the International Astronomical Union (IAU).
It is the purpose of this organization to advance and protect the field of astronomy in all of its facets, including research, communication, educational growth, and technological advancement, via the means of worldwide collaboration.
In conclusion, As of 2016, the International Astronomical Union has identified 88 different constellations. Alternative C
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-Give an example of how carbon is transferred from the geosphere to the atmosphere (if possible)
Answer:
"several processes move carbon from the geosphere to the atmosphere. Volcanic eruptions release carbon dioxide from molten rock beneath the earth's surface. The production of cement that's used for homes, skyscrapers, streets and other hardscapes"
-
Carbon Cycle and Global Warming - Wydeahttps://www.wydea.com
Explanation:
A healthy, young couple are both carriers (Aa) heterozygous of cystic
fibrosis. Cystic fibrosis is a recessive disease. What is the chance that each
of their future children will inherit this serious illness?