The superior esophageal sphincter is a muscular ring that separates the pharynx from the esophagus, has voluntary activity and is responsible for initiating swallowing.
What is the superior esophageal sphincter?
It is located immediately after the pyriform sinuses, it is a muscular ring located in the high pressure area between the pharynx and the esophagus.
This prevents the passage of air into the digestive tract during inspiration and the reflux of gastric material into the pharynx, relaxing to open the esophagus.
In order for a muscle-building athlete to keep muscles in good shape, it is necessary to synthesize more muscle protein than is consumed, which is known as nitrogen balance..
Therefore, we can conclude that the superior esophageal sphincter is a muscular ring that separates the pharynx from the esophagus, has voluntary activity and is responsible for initiating swallowing.
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true breeding parents ______ trait variant(s) to there offspring A might only pass 1 B will pass 2 C can only pass one D will not pass
True breeding parents might only pass one (1) trait variant to their offspring (Option A).
What is true breeding?A true-breeding can be defined as a special type of mating where parents produce offspring that have the same phenotype.
True breeding occurs when parental lines having a given phenotype generate descendence with this same phenotype.
These parents need to be homo-zygous, i.e., they need to have the same gene variant or allele, for the trait to be inherited.
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Answer:
True breeding parents can only pass one trait variant(s) to their offspring.
the answer is C.
Explanation:
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how do vaccines stop the spread of a virus
help please
A cell is in a solution that contains dissolved oxygen. What occurs when the cell uses oxygen for respiration?
A.
Oxygen will be carried across the cell membrane by special transport molecules.
B.
Oxygen will be held in place within the solution by special transport molecules.
C.
Oxygen in the cell will naturally diffuse into the solution.
D.
Oxygen in the solution will naturally diffuse into the cell.
Answer:
D.
Explanation:
As the oxygen inside the cell is utilized by the cell for respiration, therefore the concentration of oxygen inside the cell decreases and the oxygen in the solution naturally diffuses inside the cells through simple diffusion.
What is dissolved oxygen?
Dissolved oxygen is the amount of oxygen that is dissolved in a particular solvent. The dissolved oxygen in water comes from the atmosphere. The aquatic plants that produce the oxygen also contribute to the dissolved oxygen in water bodies.
Aquatic organisms require dissolved oxygen for respiration as they cannot take up oxygen from the atmosphere. Oxygen in water can be measured as milligrams per liter or the percent saturation.
In the RBCs, the oxygen combines with the hemoglobin and is transported by hemoglobin-facilitated diffusion or through simple diffusion in which the oxygen crosses the plasma membrane and is transported to the blood plasma through diffusion.
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Drea is comparing three organisms. Two have many of the same characteristics. But they have very few characteristics in common with the third organism. What can Drea infer about the relatedness of these three organisms?
Group of answer choices
The first two are unrelated, but each is related to the third.
Relatedness of the three organisms depends on the characteristics the first two share.
The first two are more closely related to each other than they are to the third.
The first two are equally related to the third.
Answer:
The first two are more closely related to each other than they are to the third.
Explanation:
The question tells us that the first two organisms share many common characteristics with each other, this tells us that the first two are related. We can cross out answer choice a. The question also tells us that the first two have very few characteristics in common with the third organism. With this much info given, the answer choices left are:
Relatedness of the three organisms depends on the characteristics the first two share.The first two are more closely related to each other than they are to the third.The first two are equally related to the third.First choice doesn't make any sense, there is no correlation between the common characteristics of the first two with the 3 organisms as a group.
Second choice makes sense and logical.
Third choice is wrong since the question does not give us enough information to know the first two is equally related to the third.
The first two are more closely related to each other than they are to the third. Is the right answer.
explain how weather,climate,and seasons could affect the biotic and abiotic factors of an ecosystem
Weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
What are the biotic and abiotic factors of an ecosystem?Biotic factors are each of the living organisms of an ecosystem and abiotic factors are all non-living ones such as organic and inorganic substances in the system as well as environmental conditions.
Weather, climate, and seasons could affect these factors in altering the distribution of species, but would also decrease primary production, which would affect survival and growth.
Therefore, we can conclude that the weather, climate and seasons are factors that limit the distribution of different species of living beings in ecosystems, influencing survival and reproduction.
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Which of the following describes an outcome of water scarcity in a community?
A. Emigration of people into the area
B. Increased housing and construction
C. Increased poverty and disparity
D. More imports and exports
Answer:
C. Increased poverty and disparity
Explanation for the other answers being Incorrect:
A. More people are not going to move into an area with a shortage of water.
B. Water scarcity would most likely not have a direct correlation to the construction output. However, if it did, it would most likely make the construction and new housing rate decrease
D. Not having water can make people move away and leave the area, meaning that imports and exports which require workers would not see an increase of imports and exports
The peristaltic movement of colonic contents triggered by the gastrocolic reflex approximately 1-3 times per day is called
Explain why scientists have classified protists in one kingdom when they are such a diverse group.
Explain why scientists have classified protist in one kingdom when they are such a diverse group? This kingdom is necessary for the classification of all organisms that don't fit into the other kingdom categories.
How does the diagram depicting the evolution of the eohippus into the modern day horse include
transitional forms?
The diagram depicted the evolution of the eohippus into the modern day horse through the presence of hooves etc.
What is Transitional fossil?This is defined as the fossil which exhibits the characteristics of both ancestral and derived forms.
In the evolution of the eohippus into the modern day horse, the transitional forms include :
Presence of hooves.Presence of muzzle etc.Read more about Transitional fossil here https://brainly.com/question/9452790
Which piece of evidence did darwin observe during his 5-year journey aboard the hms beagle?.
What are the genes that start cell division called?
The genes that start cell division are called Proto-oncogenes
Which of the following best explains how a dog is able to ingest and digest food, and remove waste
products from its body?
Choose 1 answer:
A dog carries out digestion and excretion through a series of redundant systems, so if one
system is injured, another will take its place.
A dog has cells whose genetic makeup can change depending on the circumstances, such as
whether the animal is ingesting and digesting food, or excreting waste.
A dog has systems of specialized cells, such as those that make up the urinary tract and
digestive system, that help it carry out these functions.
Answer:
1st is correct
Explanation:
At its simplest, a dog's digestive system is a long tunnel that runs from their mouth to the anus. Food goes in at the mouth and travels through this tube and at various stages is broken down and either absorbed into the body or excreted as waste at the anus.
Polymers are made up of which of the following?
Atoms
Electricity
Threads
Pigments
Answer:
Your answer is A.) Atoms.
Explanation:
Hope this helps you!
Answer:
Threads
Any fabric you take from earth's surface they are made up threads.Polymers are also one kind of fabric .So they also contain threadsOption C
breeding from an existing selection
creating high-producing animals
using biotechnology for breeding
Breeding creating high-producing animals by using biotechnology in order to create a productive organism.
What is genetic enginnering?Genetic engineering is the process in which we use recombinant DNA technology in order to change the genetic makeup of an organism.
So we can conclude that breeding creating high-producing animals by using biotechnology in order to create a productive organism.
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what did the large prokaryotic cell provide the mitochondria and/or chloroplast ancestors?
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion.
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Select the correct answer. a patient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused these symptoms? a. vitamin a b. vitamin b6 c. vitamin b12 d. vitamin c e. vitamin e
A patient has a history of poor nutrition. he has skin rashes, bleeding gums, and a cut that hasn’t healed in a long time. what vitamin deficiency most likely caused these symptoms vitamin c.
Which disease is caused by vitamin B6?Vitamin B6 deficiency causes peripheral neuropathy and a pellagra-like syndrome, with seborrheic dermatitis, glossitis, and cheilosis, and, in adults, can cause depression, confusion, electroencephalogram abnormalities, and seizures.
Thus, the correct option is "D".
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Answer:
D. Vitamin C
Explanation:
PLATO
Bees are common pollinators, and many commercially grown crops that we eat depend on bee pollination Bees' eyesight allows them to be such successful pollinators. They have two sets of eyes. At the top of their heads, bees have three smaller eyes (called ocelli) that help them discern light intensity, maintain stability, and navigate. They also have two large compound eyes that detect movement Bees can see ultraviolet (UV) light with their ocelli. Thus, vibrant ultraviolet colors and pattems in flower petals are visible to bees but invisible to us. These pigments often direct the bee to specific parts of the flower (eg, the flower's center). Additionally, their remarkable eyesight allows them to visualize objects at high speeds. For example, while you might see a blur of color if you quickly drove past a meadow, a bee could easily visualize individual flowers in the meadow without reducing its flight speed.
Given this information, consider why these characteristics may have evolved in the bee.In three to five sentences, describe these factors
• how one of these characteristics would benefit the bee .
• how one of these characteristics would benefit the flower or crop
Adaptations such as keen eyesight and ability to visualize colors allows the bees to find food while increasing the plants chances of pollination.
What are adaptations?Adaptation refers to the special features an organism possess that enhances its chances of survival in its environment.
The adaptations in bees such as eye structure help them to easily locate flowers to obtain nectar.
The plants themselves are benefited as they can easily get pollinated by the bees.
Therefore, adaptations such as keen eyesight and ability to visualize colors allows the bees to find food while increasing the plants chances of pollination.
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After you set up a fish tank, you are sure to see algae growing in it. There is plenty of light, fertilizer in the form of fish droppings, and plants or glass for algae to cling to. You may see green strings of algae in the water or green spots growing on the glass. Your whole aquarium can turn green if you don’t stop the algae. To prevent the problem, you can add algae-eating fish or microorganisms to the water. Covering the aquarium for a few days will also kill algae, which need photosynthesis to survive.
Multi-celled algae grow into larger organisms through cell division. For one-celled algae, the purpose of cell division is
.
Answer:
tissue growth and maintenance
Explanation:
Which statement best explains why cells differentiate in multicellular organisms? Cells differentiate to form specialized cells that make up tissues and organs. Cells differentiate to form cells with different DNA that perform different functions. Cells differentiate to form the cells necessary for reproduction. Cells differentiate to create proteins and fat.
The statement that explain why cells differentiate in multicellular organisms Is Cells differentiate to form specialized cells that make up tissues and organs.
What are multicellular organisms?Multicellular organisms refer to living organisms that are comprises or made up of two or more cells for the proper functioning of the body make up.
Examples of multicellular organisms are goats, humans, sheep and so on.
Cells in multicellular organisms differentiate to form tissues and organs. Multiple cells former tissues and multiple tissues formed organ.
Therefore, The statement that explain why cells differentiate in multicellular organisms Is Cells differentiate to form specialized cells that make up tissues and organs
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Answer: The answer is Cells differentiate to form specialized cells that make up tissues and organs.
Explanation: I took the test and it was right
Hope this helps :)
Which of the following is NOT one of the principles of natural selection?
A
variations occur among individuals of a species
B
characteristics developed during a lifetime can be passed to offspring
C
organisms produce more offspring than can survive
D
variations are passed to offspring
Answer:
c
Explanation:
The mouth doesn't produce sperms.
why cant biotic factors be composed of cells
Answer:
True
Explanation:
Because they can't be living, as abotic factors need cells to function. biotic don't need any cells because they are nonliving, such as a rock or a bed.
Which is NOT connective tissue?
A. Bones
B. Fat
C. Blood
D. Neurons
What is the role of guard cells in photosynthesis?.
Answer: To use Osmotic pressure to open and close Stomata, allowing plants to regulate the amount of water and Solutes within them.
Explanation:hope this helps :3 have a nice day xlXCherryColaXlx...(pls mark Me brainliest)
Why are sunflowers planted in nuclear affected areas?.
Answer:
Sunflowers can take up high concentration of radioactive isotopes and sequester them in stems and leaves hence, they have been employed to clean up contaminated sites following nuclear disasters.
Explanation:
Explanation:
sunflowers were planted across the affected landscapes to help absorb toxic metals and radiation from the soil.
Regular consumption of organic food will keep you in a good mood. In this example, the confounder could be:.
problems young south African face
Answer:
The youth in South Africa face challenges such as crime, unemployment, poverty, and most importantly unequal opportunities in education. These challenges should not be present in the daily lives of South African youth, especially since it has been over two decades since South Africa's first democratic elections.
Explanation:
no Explanation
Answer:
crime, unemployment, poverty, and most importantly unequal opportunities in education.
Explanation:
Which product is the result of mitosis?
two genetically identical nuclei
four sperm and four eggs
four genetically identical nuclei
two sperm and two eggs
Answer:
two genetically identical nuclei
Explanation:
The result of mitosis is two identical daughter cells, genetically identical to the original cell, all having 2N chromosomes.
Hope this helped <3 brainliest please? :)
please can someone help asap?! so stressed with bio right now):
The answer is D) fruits and vegetables that do not spoil easily
You can eliminate B and C, since those two are clearly not positive outcomes (I doubt anybody would want more viruses and fewer animals on Earth!)
A is a little less obvious; however, genetically manipulating crops to have a slower growth rate would be a negative effect on the harvest (and it's probably something most farmers wouldn't want to do anyway.)
So, the answer is D. This makes sense, since having fruits and veggies that don't spoil easily would be a benefit so they can have longer shelf lives.
Hope this helps :)
Describe the steps by which oxygen moves from the environment to cells in the body and carbon dioxide moves from cells to the environment.
Oxygen is inhaled into the lungs for gaseous exchange, to occur between the blood and the alveoli, where oxygen diffuses into the blood; then, binding to haemoglobin of the red blood cells, which is carried away to cells in the body for respiration and CO2 diffuses out of the blood, to be exhaled.
Hope this helps!
When do two gametes become diploid?
when they halve their number of chromosomes
when they come together during fertilization
when they create copies of themselves
when they grow in size
Answer:
when they come together during fertilization
Explanation:
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