The nervous system controls when a stressor is perceived, and the body responds by going into "fight-or-flight" mode, mobilizing its resources to deal with the threat or hazard.
Is being nervous a good thing?It's normal to feel anxious before a performance since your body is trying to help you perform at your best. In situations like these, your body creates "stress hormones," such as adrenaline, which can actually aid in concentration.
What occurs when I'm nervous?Your immune system releases stress hormones like cortisol and adrenaline when you're anxious or agitated. These result in the physiological indicators of anxiety, including a faster heartbeat and more perspiration. One such physical indication is a racing heart.
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Bottom-oriented fish have large, broad pectoral fins and depressed( flattened top-to-bottom) body shapes. Explain how these adaptations are well suited for life at the bottom of a body of water.
Answer:
they are better for camoflauge and for deep pressure
Explanation:
the fins helps control the crushing pressure that is constant at deep depths and the flattened bodies make them less visible since it is dark
Bottom-oriented fish have large, broad pectoral fins and depressed (flattened top-to-bottom) body shapes.These adaptations are well suited for life at the bottom of a body of water.
What is adaptation?Adaptation refers to the process where organisms inherit traits that help for better survival and reproduction in its environment.The large, broad pectoral fins and depressed body shapes of bottom-oriented fish are well-suited for life at the bottom of a body of water for several reasons:
The broad pectoral fins provide the fish with greater surface area, which allows them to maintain their position and stability while resting on the bottom of the water body The depressed body shape of these fish allows them to minimize their profile and reduce their exposure to the water current.Hence, the large, broad pectoral fins and depressed body shapes of bottom-oriented fish are adaptations that help them to survive and thrive in the challenging conditions of the bottom of a body of water.
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The red blood cells in the 0.10 mol dm-3 salt solution burst.
Explain why the red blood cells burst.
Answer:
red blood cells burst.
Explanation:
Red blood cells placed in a solution with a higher water concentration compared to their contents (eg pure water) will gain water by osmosis, swell up and burst. Water will diffuse from a higher water concentration outside the cell to a lower water concentration inside the cell.
https://www.bbc.co.uk › revision
The effects of osmosis on animal
Red blood cells placed in a solution with a higher water concentration compared to their contents will gain water by osmosis, and get swell up and burst.
What is red blood cells and its function?Red blood cells are responsible for transporting oxygen from your lungs to your body's tissues. Your tissues produce energy with the oxygen and release a waste, identified as carbon dioxide.
What is red blood cells?A type of blood cell that is made in the bone marrow and found in the blood. Red blood cells contain a protein called hemoglobin, which carries oxygen from the lungs to all parts of the body.
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A coral reef is damaged during a hurricane. The waves and currents move broken pieces of coral onto the beach. What happened to the matter in the broken pieces of coral?.
Answer:
The coral was no longer part of the reef, but it did become part of the beach.
Explanation:
Prompt:
Please use complete sentences.
What factors contributed to the shift from hunting and gathering to agriculture?
This is a biotechnology question but there isn't a subject choice for it.
Answer:
One of the main factors was a lack of wild animals suitable for hunting and a lack of plants suitable for gathering.
Explanation:
This in turn was due to either climate change or to animal population declines because of unsustainable volumes of hunting and gathering
Globalization is the process of the world becoming more connected. Like any process that involves economic choices, it has positive and negative consequences. China is one of the world's fastest-growing economies, and it has experienced many consequences as the result of globalization. One severe consequence has been a sharp increase in air pollution. In an informative essay, describe the effects of globalization on air pollution in China's largest cities. Use outside research to gather anecdotes and data to help you demonstrate your findings. Be sure to cite your sources on a Works Cited page.
70 Points
Despite that globalization contributed to air pollution in China's largest cities, it has also led to increased awareness and action on the issue.
As countries continue to work together to address air pollution, there is hope that the negative impacts of globalization can be mitigated, and the health and well-being of urban residents can be improved.
What are the effects of globalization on air pollution in China's largest cities?Globalization has had both positive and negative effects on air pollution in China's largest cities. On one hand, globalization has contributed to economic growth, urbanization, and industrialization in China, which has led to increased economic activity and improved living standards for many people. However, this growth has also led to increased air pollution, particularly in urban areas.
One of the main ways that globalization has contributed to air pollution in China's largest cities is through the expansion of industrial activities. As global demand for goods and services has increased, China has become a major manufacturing hub, with many factories located in or near urban areas. Many of these factories use fossil fuels and emit large amounts of pollutants into the air, contributing to the country's air pollution problem.
However, it has positive side because its has also led to increased awareness and action on air pollution in China's largest cities. As international attention has focused on China's air pollution problem, the government has taken steps to address the issue, such as implementing stricter emissions standards and investing in renewable energy sources.
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Infer why muscle cells contain more mitochondria than do skin cells.
Answer:
More energy production
Explanation:
Muscles are actively involved in movement. For this purpose, they require more energy as compared to other cells of the body. As mitochondria are responsible for energy production, hence muscle cells have a larger number of mitochondria as compare to skin cells.
When you have corona virus what is the main body system that is being affected? How does it affect other systems?
Which organelles are involved in the production and breakdown of hydrogen peroxide?
The organelles involved in the production and breakdown of hydrogen peroxide are peroxisomes.
Peroxisomes are small, membrane-bound organelles found in eukaryotic cells. They are involved in various metabolic processes, including the breakdown of fatty acids and the detoxification of harmful substances.
In these processes, peroxisomes generate hydrogen peroxide (H2O2) as a byproduct. To prevent damage to the cell, peroxisomes also contain the enzyme catalase, which breaks down hydrogen peroxide into water (H2O) and oxygen (O2). This breakdown of hydrogen peroxide helps to maintain a safe level of this potentially harmful substance within the cell.
In summary, peroxisomes are the organelles responsible for both the production and breakdown of hydrogen peroxide in eukaryotic cells. They play a crucial role in maintaining cellular health by efficiently managing the levels of this potentially toxic compound.
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Which of the following would increase species biodiversity in Florida?
A.
Placing no limits on alligator hunting in lakes
B.
Legalized hunting for monkeys around the St. John’s River
C.
Protecting black bears in state or national forests
D.
Clearing land for a new entertainment theme park
Answer:
C
Explanation:
Biodiversity measures the variety of organisms in an ecosystem. Allowing hunters to hunt alligators depletes the alligator population which decreases biodiversity. Legalizing monkey hunting depletes the population which decreases bio diversity. Deforestization rids animals of their habitats which massively decreases biodiversity due to the plants, trees, and animals destroyed in the process. That and the fact that there will be less sites for nesting and homes for the animals which will decrease biodiversity even more over time. It's all connected.
Protecting a species conserves the population and ensures the safety of the animal especially from human interference. This allows the animal (specifically the black bear) to survive in its habitat unharmed and allows it to play its role in the ecosystem and contribute to biodiversity.
what caused the abolishment of the French monarchy
Answer:
Food Shortages and Economic crisis
Explanation:
Food shortages and economic troubles sparked the French Revolution in 1789. In August 1792, King Louis and Queen Marie-Antoinette were imprisoned, and the monarchy was abolished in September. Louis was tried and sentenced to death by a slim majority in January 1793.
Write in your own words
1.Which chromosome is hemophilia attached/carried on?
2. Are males or females more likely to have hemophilia?
3. What is a carrier?
4. Who can be a carrier of hemophilia?
5. Does a carrier have hemophilia?
The X chromosome houses the faulty gene that causes hemophilia. Women can have hemophilia, despite the fact that it is less common in them than in men.
What in biology is the carrier?a person with one copy of a disease-causing gene mutation who exhibits only minimal or nonexistent clinical symptoms. A biological child can inherit the mutant gene from a carrier. A child who receives one mutant copy of a particular gene of each parent typically manifests the sickness or condition.
Who can be a hemophilia carrier?Hemophilia is "carried" by females who have one abnormal X chromosome. She is capable of passing the afflicted gene to her offspring. A female carrier may also occasionally exhibit hemophilia symptoms.
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What are the characteristics of Echinoderms that belong to the Echinoidea class?
covered in spikes and have several tube feet
covered in spikes, but have no tube feet or arms
covered in spikes and tube feet and lack arms
covered in tube feet and have five arms
The Echinoidea class has a globose and discoidal body, with no arms. They have a skeleton composed of plates with spikes. Ambulacral feet are in charge of motion, feeding, and respiration. A) Covered in spikes and have several tube feet.
What are Echinoidea?
Echonoidea, commonly known as Sea urchins, belong to the Echinoderm group.
They have a globose or discoidal shape. They lack arms, and have an external skeleton covered by the epidermis. This skeleton is composed of several plates with articulated mobile spikes.
In the body interior there is a duct system that communicates with the exterior through the madreporite. Ambulacral feet derivate from these ducts and have motion, feeding, and respiratory functions.
On the dorsal region, there are 5 plates, one of them the madreporite and the remaining ones are reproductive plates.
According to this information, option A is correct. Echinoidea class is covered in spikes and have several tube feet.
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Answer:
it's C
Explanation:
I took the exam
For most adults over age 40, the reminiscence bump describes enhanced memory for ________.
Question options:
a) childhood and adolescence.
b) adolescence and young adulthood.
c) young adulthood and middle age.
d) childhood and middle age.
For most adults over age 40, the reminiscence bump describes enhanced memory for adolescence and young adulthood.
What is a reminiscence bump?
A "reminiscence bump" is a concept used to describe a phenomenon in which individuals tend to recall more memories from their adolescence and early adulthood years compared to the other periods of their lives.
It is a cognitive phenomenon that occurs due to the idea that events that happen in adolescence and young adulthood are often very memorable.
The idea of a reminiscence bump is based on the fact that the human brain continues to develop and change throughout the different stages of life, with each period of development associated with unique cognitive and social changes.
Thus, the memories formed in adolescence and the early adulthood years may be more vivid and enduring than those from other periods of life.
For most adults over age 40, the reminiscence bump describes enhanced memory for adolescence and young adulthood.
They tend to recall more memories from this period of their lives compared to the other periods of their lives.
Therefore, option (b) adolescence and young adulthood—is the correct option.
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1. The dependent variable is also called which of the following?
O responsive
O responding
O manipulated
O manipulator
2. The independent variable is also called which of the following?
O Responsive
O Responding
O Manipulated
O Manipulator
PLEASE HELP FAST!!! I’m timed
Answer: Independent=Manipulated
Dependent=Responding
Explanation:
It's in Nearpod
How are meiosis and mitosis different?
A. Cells go through telophase In mitosis, but In meiosis they don’t.
B. Chromatids from only during the process of meiosis.
C. Mitosis produces haploid cells, while meiosis produces diploid cells.
D. Only meiosis results In a reduction In chromosome number.
Answer: D. Only meiosis results In a reduction In chromosome number.
Explanation:
I got it correct on the test
what happens to cells formed by meristematic tissue
Answer:
The cells formed by meristematic tissue take up a specific role and lose their ability to divide. As a result, they form a permanent tissue. This process of taking up a permanent shape, size and function is called differentiation.
Please mark me as brainlist.Which of the following organs is found in the pelvic cavity?
A. urinary bladder
O B. kidneys
O C. liver
D. spleen
E. gallbladder
Urinary bladder is the organ which is found in the pelvic cavity. Thus, the correct option is A.
What is the Pelvic cavity?The pelvic cavity is a funnel-shaped space which is surrounded by the pelvic bones and also contains the organs, such as urinary bladder, rectum, and the pelvic genitals. The pelvic cavity and the abdominal cavity together form the larger abdominopelvic cavity in the body.
The pelvic cavity has been found to function as a housing space for the urinary bladder, the pelvic colon, internal reproductive organs, and the rectum. The pelvic cavity in the body additionally the houses other internal structures and tissues which include the muscles, arteries, veins, nerves, and the pelvic connective tissue.
Therefore, the correct option is A.
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Two populations of organisms
are considered the same
species if
Answer:
they can naturally interbreed to produce a fertile offspring
human blood consist of a groups A ,B and O . however, there is one more blood group AB which contains alleles A and B in the same genotype what is this phenomenon called?
Options are not providedin the question, so the complete question is as follows:
human blood consists of groups A ,B and O. however, there is one more blood group AB which contains alleles A and B in the same genotype what is this phenomenon called?
A. coinheritance B. codominance C. incomplete dominance D. polygenic inheritance
Answer:
B. codominance
Explanation:
Codominance is a phenomenon in which an individual receives genes from each parent. If the genes or alleles are different it means, dominant allele masks the effect of the recessive allele.
Codominance occurs in the case of the AB blood type in humans in which alleles A and B are present in the same genotype.
Hence, the correct answer is B. codominance.
complex iii delivers 4 protons. where do these 4 come from? mitochondrial intermembrane space nadh mitochondrial matrix uqh2
Complex III uses the energy obtained from electron transfer to pump protons from the matrix to the intermembrane space, contributing to the establishment of the proton gradient used in ATP synthesis.
The process you are referring to is the electron transport chain (ETC) in mitochondria. Complex III, also known as cytochrome bc1 complex, is an important component of the ETC responsible for transferring electrons from ubiquinol (UQH2) to cytochrome c. During the operation of complex III, it facilitates the transfer of electrons from UQH2 to cytochrome c while also contributing to the pumping of protons (H+) across the inner mitochondrial membrane. This proton pumping is essential for establishing an electrochemical gradient across the membrane, which is used by ATP synthase to generate ATP.
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these bacteria produce a toxin that causes: group of answer choices whooping cough psoriasis cystic fibrosis
The bacteria that cause whooping cough, also known as pertussis, produce a toxin that triggers a strong coughing reflex. The toxin affects the cilia (hair-like structures) in the airways, causing them to become inflamed and irritated.
This leads to coughing fits that can last for several minutes and may end with a whooping sound as the person tries to catch their breath. The toxin can also damage the lungs, making it difficult for the person to breathe, and can cause other symptoms such as fever, vomiting, and fatigue.
Whooping cough is a highly contagious disease that can be very serious, especially in young infants who may not be able to clear the infection on their own. The best way to prevent whooping cough is through vaccination, as the vaccine provides protection against the toxin produced by the bacteria.
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what sample is taken from a pregnant person to perform a maternal serum screening test?
Answer:
A blood sample is taken. I hope this helps! :)
In biology what do we call two organisms that are the same?
Answer:
Symbiont
Explanation:
Are the insulin and hemoglobin genes found in each of our cells?
yes
no
Answer:
yes
Explanation:
Need help with this i need proper answer
How do you differentiate the ability to absorb the radiant energy of a material that is colored black to a material that has a reflective color? think of an application of this
This difference arises from the fact that black materials absorb all the colors of the visible spectrum, while reflective materials reflect most of the visible spectrum.
A material that is colored black absorbs almost all the radiant energy that falls on its surface, whereas a material with a reflective color reflects most of the radiant energy that falls on its surface.
One application of this difference can be found in solar panels. Solar panels are designed to absorb as much radiant energy from the sun as possible in order to generate electricity. Therefore, the material used to make solar panels is typically a dark color, such as black, in order to maximize the absorption of radiant energy. On the other hand, buildings in hot climates may use light-colored or reflective materials on their roofs and walls to reflect as much radiant energy as possible in order to reduce the amount of heat that enters the building, thus reducing the need for air conditioning and energy consumption.
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An organism with IsCAP+P+O+Z+Y+A+/F’I+ will have a normal functioning Lac operon.
a) True
b) False
An organism with is CAP+P+O+Z+Y+A+/F’I+ will have a normal functioning Lac operon - False
The presence of F’I+ indicates that the organism has an extra copy of the lac operon, which can result in higher than normal levels of gene expression. Additionally, the IsCAP+, P+, O+, Z+, Y+, and A+ indicate that the lac operon is inducible and functional. However, the presence of A+/F’I+ suggests that there is a mutation in the regulatory gene that codes for the lac repressor protein. This mutation prevents the repressor from binding to the operator site and inhibiting transcription, leading to constitutive expression of the lac operon even in the absence of lactose.
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which part of the brain is associated with forming speech?
Answer:
the left hemisphere or side of the brain is responsible for language and speech.
Explanation:
What does DNA have that makes it too big to leave the nucleus?
A) Deoxyribose sugar, single helix shape, & thymine base
B) Deoxyribose sugar, double helix shape, & uracil base
C) Ribose sugar, double helix shape, & thymine base
D) Deoxyribose sugar, double helix shape, & thymine base
DNA consists of deoxyribose sugar, double helix shape, & thymine base. The correct option is D.
Thus, a deoxyribose sugar, a phosphate group, and a nitrogenous base make up the two strands of nucleotides that make up DNA's double helix structure. Adenine (A), thymine (T), cytosine (C), and guanine (G) are the four nitrogenous bases found in DNA.
The two strands are held together by hydrogen bonds that develop between the nitrogenous bases, creating a solid structure consisting of a deoxyribose sugar, a phosphate group, and a nitrogenous base. The nuclear pores in the nuclear envelope, which divides the cell's nucleus from the cytoplasm, are too big to accommodate the double helix DNA structure. As a result, DNA is kept within the nucleus and is unable to exit.
Thus, the ideal selection is option D.
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besides springtails, are there other ways moss sperm may be transferred from male to female gametophytes?
Splashing of sperm from male to female gametophytes may be aided by rain. Sperm transfer from other species of animals may assist.
Mosses are tiny, non-vascular, flowerless plants that belong to the scientific order Bryophyta strictly speaking. The parent group bryophytes, which includes hornworts, mosses, and liverworts, may alternatively be referred to as bryophyta (sensu lato, Schimp. 1879. In wet or shaded areas, mosses frequently develop dense, green mats or clumps. The basic leaves on individual plants are typically only one cell thick, linked to a stem that may or may not have branches, and play a very limited role in transporting water and nutrients. Despite the fact that certain species have conducting tissues, these tissues are typically underdeveloped and physically distinct from tissue found in vascular plants. Mosses do not produce seeds; instead, they produce sporophytes, which are unbranched stalks topped with spore-containing capsules. Splashing of sperm from male to female gametophytes may be aided by rain. Sperm transfer from other species of animals may assist. Mosses can either be monoicous or dioicous (compare dioecious in seed plants) (compare monoecious). Male and female sex organs are carried on distinct gametophyte plants in dioicous mosses. Both are produced on the same plant in monoicous mosses, also known as autoicous mosses. A diploid sporophyte is created when sperm from the antheridia swim to the archegonia and fertilise it in the presence of water. Moss sperm are biflagellate, which means they have two flagella for locomotion. Fertilization cannot take place without water because the sperm must swim to the archegonium. Some species, notably Mnium hornum and many Polytrichum species, retain their antheridia in what are known as "splash cups," bowl-shaped structures on the shoot tips that cause the sperm to travel several decimeters when disturbed water droplets hit it, increasing the fertilization distance.
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Please help! skin melanocytes produce the protein melanin, which gives the skin pigment. muscle cells do not produce melanin. which statement explains this difference between skin melanocytes and muscle cells?
A. muscle cells rely on rna, while melanocytes rely on dna.
B. melanocytes and muscle cells express different genes.
C. muscle cells destroyed the gene for melanin, but melanocytes did not.
D. melanocytes contain different genes from muscle cells
Answer:
The correct answer is B. "Melanocytes and muscle cells express different genes."
Although all cells in an organism (such as a human) contain the same DNA, different cell types express different sets of genes. Gene expression is the process by which specific genes are activated to produce a needed protein. In this case, the gene responsible for melanin production is expressed in melanocytes, but not in muscle cells.
This does not mean that muscle cells have destroyed the gene for melanin (as stated in option C) or that melanocytes contain different genes from muscle cells (as stated in option D). All cells within an organism contain the same genes, but not all genes are expressed in every cell. The process of gene expression is regulated by the cell to ensure that each cell type functions properly.
Option A is also incorrect because all cells, including both muscle cells and melanocytes, rely on both DNA (for storing genetic information) and RNA (for transmitting that information and producing proteins). DNA is transcribed into RNA, which is then translated into proteins. This process occurs in all cells.
The statement explains the difference between skin melanocytes and muscle cells is - melanocytes and muscle cells express different genes. So option b is correct.
Melanocytes are dark, dendritic-shaped, highly differentiated cells that secrete melanin, a pigment found in melanosomes, which is the primary function of melanocytes.
Melanocytes are a type of cell derived from the neural crest. They form a synapse with keratinocytes through their dendrites in the epidermis. Melanocytes play an important part in skin pigmentation and their role in the generation and distribution of melanin has been extensively studied.
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