The horseshoe crab is an example of a living fossil because of (c) there are fossils of extinct ancestors of horseshoe crabs, and the species is still alive today.
They have remained essentially unaltered for approximately 445 million years, horseshoe crabs are believed to be living fossils. In most cases, they are not crabs, and neither lobsters nor crabs are particularly linked to them. The horseshoe crab shares a tight relationship with other arachnids and spiders.
In general, there are four different species of horseshoe crabs that are alive today, but the species known as Limulus polyphemus is the only one that can be discovered in North America. It can be found all the way from Maine to Mexico on the coasts of the Atlantic and Gulf of Mexico. So the correct option is (c).
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What does a standard deviation of 2.0 mean?
Answer:
It is a measure of how far each observed value is from the mean. In any distribution, about 95% of values will be within 2 standard deviations of the mean
Q-15. Species is a non-native plant/animal introduced accidentally or intentionally by humans is called
as
a) endangered
c) extinct
b) invasive/ exotic
d) threatened
Q-16.
a) Species
c) Genetic
b) Ecosystem
d) Ecological
biodiversity related to genes
Q-17. Genetic biodiversity covers different varieties of a
a) Different
c) United
b) Equal genes
d) same
Q)15 =b)invasive/ exotic
Q)16=c)Genetic
Q)17=b)Equal genes
endangered means it's being harmed extinct mean that is no longer here on the earth.threatened means that it's like being hunted down and it's exact same thing as endangered and invasive and exotic means that something unique or special and invasive means harmful to something
something that would be related to species would be genetic because genetic means something that has the same genes as a different animal or person
Answer:
Q-15. Species is a non-native plant/animal introduced accidentally or intentionally by humans is called as b) invasive/ exotic
Q-16. Genetic biodiversity related to genes c) Genetic
Q-17. Genetic biodiversity covers different varieties of a d) same
Explanation:
here is an explanation for each of the questions:
Q-15. The term "invasive/exotic" refers to species that are not native to a particular ecosystem, but have been introduced either accidentally or intentionally by humans. These species can cause harm to the native species and the ecosystem by competing for resources, spreading disease, or disrupting the natural balance of the ecosystem.
Q-16. "Genetic biodiversity" refers to the variety of genes within a species or population. It is a measure of the diversity of inherited traits and characteristics within a group of organisms.
Q-17. "Genetic biodiversity" covers different varieties of the same species, meaning it refers to the diversity of genes within a single species. This can include variations in physical traits, behaviors, and adaptations that allow individuals within a species to survive and thrive in different environments.
How does a point mutation affect the protein quizlet?
A point mutation can affect the whole structure of the protein.
Point mutation is the type of mutation where change occurs in a single nitrogenous base of the sequence of gene. This change of base can be addition, deletion or alteration. It can result in the change in protein structure or addition of stop codon in between.
Proteins are the biomolecules formed from amino acid as the monomers. These are very essential for the living body as proteins are involved in all of the bodily functions. The formation of proteins takes place in the cytoplasm of the cell where ribosomes are present.
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Also known as nephrorrhaphy, a _____ is the surgical fixation of a floating kidney.
A) nephropexy
B) nephroptosis
C) nephropyosis
D) hydronephrosis
Also known as nephrorrhaphy, a nephropexy is the surgical fixation of the floating kidney.
Nephropexy is a technical surgery that was performed in the year 1881 by Eugen Hahn. It is used to treat the condition of floating kidney also called nephroptosis. In this surgery he kidney is fixed to the retro-peritoneum of the body.
Kidney is the organ of the excretory system of the human body. It is in the shape a bean and is present in a pair. It is involved in the filtration of the blood of the body. The kidney has a basic unit called nephron. There are several nephrons that together form the kidney.
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what is the chromosome composition of a normal human male
Answer: Two of the chromosomes (the X and the Y chromosome) determine your sex as male or female when you are born. They are called sex chromosomes: Females have 2 X chromosomes. Males have 1 X and 1 Y chromosome.Ma
Explanation:
co-expressed eukaryotic genes are usually located on different chromosomes. how are genes coordinately controlled in eukaryotic cells? coordinately controlled genes in eukaryotic cells are activated by the same chemical signals. coordinately controlled genes in eukaryotic cells are located together on the same chromosome. a specific combination of control elements in each gene's enhancer coordinates the simultaneous activation of the genes.
Both transcriptional activators and repressors that bind to particular deoxyribonucleic acid (DNA) sequences regulate the expression of eukaryotic genes.
What mechanism regulates eukaryotic gene expression most frequently?Unlike prokaryotic cells, eukaryotic cells can regulate gene expression at a variety of different levels. Eukaryotic gene expression is controlled, starting with access to the DNA. Even before transcription is started, this type of regulation, known as epigenetic regulation, takes place.
How do prokaryotes and eukaryotes regulate gene expression?Prokaryotic gene expression is mostly regulated by transcription. The regulation of eukaryotic gene expression involves epigenetics, transcription, post-transcription, translation, and post-translation.
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concentric rings around the central canal
The central canal known as the osteonic (haversian) canal is surrounded by concentric rings (lamellae) of matrix that make up the osteon.
A single layer of columnar ependymal cells lines the central canal, also known as the spinal foramen or ependymal canal, which runs from the conus medullaris in the lumbar spine to the caudal angle of the fourth ventricle. It depicts a piece of the original neural tube's lumen.
Along the spinal cord's length, there is a hollow tube called the Central Canal. The cerebral spinal fluid, a colourless fluid that surrounds the whole central nervous system as well as different channels and chambers inside the central nervous system, is what fills this route.
Concentric circles are those that share a common centre but have differing radii. It is described as two or more circles with the same centre, in other words. The area between two concentric circles with different radii is known as an annulus.
Complete question:
what is concentric rings around the central canal?
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With Biogeographical evidence we know that animals spread and did what to their environments to enhance survival?
Answer:
Biogeographical evidence can tell us a lot about how animals have interacted with their environments over time. For example, by studying the distribution of different species and their habitats, we can learn how animals have adapted to different environments in order to enhance their survival. Some examples of this include animals developing specialized physical adaptations to help them survive in different environments, such as thick fur to stay warm in cold climates or long legs to run quickly in open areas. Additionally, animals may have changed their behavior in order to better survive in their environments, such as forming social groups to defend against predators or cooperating with other species to find food. Overall, biogeographical evidence can provide valuable insights into how animals have evolved and adapted over time in order to survive and thrive in their environments.
Explanation:
Largest Gland of our human Body?
The largest gland is Liver In human being
what role does carbon play in the human body
Carbon makes up a large part of practically every part of the human body. It serves as a bonding agent that facilitates the construction of complex chains of molecules. In this sense, carbon can be thought of as a building block for biological molecules.
63. Considered the "Father of Taxonomy". His classification system was built on visible characteristics and is still used today. Kingdom, Phylum, Class, Order, Family, Genus, Species
a. Aristotle b. Linnaeus c. Woese
Which structure is highlighted? vestibular membrane spiral organ nerve fibers of cochlea basilar membrane tectorial membrane
Nerve fibers of cochlea is highlighted.
An axon, a long process of a nerve cell (neuromuscle), is what is known as a nerve fiber. Anatomically, the nerve cell's body is found either in the ganglia of the peripheral nervous system or in the central nervous system. An axon, also known as a nerve fibre or nerve fibre, is a long, slender projection of a nerve cell, or neuron, in vertebrates that normally transports electrical impulses known. as action potentials. away. from the nerve. cell body. The word "axon" comes from the Greek word "váxn," which means "axis." The axon's job is to send information to various neurons, muscles, and glands. The axons of some sensory neurons, known as pseudounipolar neurons, such as those for touch and warmth are referred to as afferent nerve fibres, and an electrical impulse travels along these from the cell body to the periphery and from the cell body to the spinal cord along a different branch of the same axon.
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Q.12. How to preserve biodiversity?
a) By preventing deforestation
c) By protecting species
b) By reducing waste
d) all of above
The correct answer is option D all of the above.
Biodiversity refers to all the life forms that exist in an area including plants, animals, and humans. It is important to preserve biodiversity because man is dependent on nature for food, shelter, fuel, and everything.
Biodiversity can be preserved by:
a) By preventing deforestation - Trees are home to a large number of birds and animals. Trees help in maintaining the balance in the ecosystem.
b) By protecting species - In nature each specie has a specific role and is interconnected to other species. Protecting the species is the most important aspect of the preservation of biodiversity.
c) By reducing waste - Reducing the waste will create a cleaner and safer environment for all organisms to thrive in thus protecting biodiversity.
Therefore all the above options are correct.
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which step in the digestive process represents a chemical change in food? question 10 options: storing of swallowed food in the stomach movement of food down the esophagus to the stomach churning of food, liquids, and digestive juices in the stomach substances in the mouth and stomach breaking down fats and proteins
Digestion is the process by which food is broken down into smaller molecules so that the body can absorb and use the nutrients. It is an incredibly complex process that involves a variety of steps.
One of the most important steps in the digestive process that represents a chemical change in food is the churning of food, liquids, and digestive juices in the stomach. The stomach is lined with a thick layer of muscle that helps to churn the food and mix it with digestive juices.
The churning of food, liquids, and digestive juices in the stomach is an important step in digestion that represents a chemical change in food. Without this process, the food would not be broken down into smaller molecules, and the body would not be able to absorb and use the nutrients. The digestive juices also help to neutralize the stomach acid, preventing it from damaging the delicate lining of the stomach.
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When a pea plant with purple flowers is crossed with a pea plant with white flowers?
Mendel observed that true-breeding (P generation) plants hybridized produced an F1 generation with only one trait of a characteristic. When a true-breeding purple blooming plant crossed with a true-breeding white flowering plant, the result was invariably a hybrid plant with purple flowers.
What are the two primary categories of plants?Plants can be split into two categories: blooming plants, such as sunflowers, orchids, and the majority of tree species. The second category includes nonflowering plants, which also includes ferns and mosses.
What do you call plants?Having a stem, branches, and roots, a plant is a living organism that develops in the soil. Exotic plants should all receive the appropriate amount of water. equivalent terms: flower, shrub, veggie, herb more words for "plant"
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List the factors that can effect the rate of photosynthesis
Answer:
The factors that can effect the rate of photosynthesis are as follows:
carbon dioxide concentration
light intensity
temperature
water
sunlight
chlorophyll
What are the four different phenotypes?
Phenotype" actually refers to an observable trait. "Pheno" actually means "observe" and springs from the equal root because the word "phenomenon".
And so it is an observable form of an organism, and it could consult with whatever from a not unusualplace trait, which include top or hair color, to presence or absence of a disease.
Conclusion: It is concluded that the DCCee phenotype changed into the maximum not unusualplace with its in all likelihood genotype DCe/DCe, whilst the least not unusualplace phenotype changed into ddCcee with its in all likelihood genotype Ce/ce.Since every figure has 4 exclusive mixtures of alleles withinside the gametes, there are 16 feasible mixtures for this go.The F2 progeny of Mendel's dihybrid go showcase 4 exclusive phenotypes: spherical yellow, spherical green, wrinkled yellow and wrinkled green.
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How many bacteria are there after 24 hours?
Answer:
The bacterium doubles every half hour. One hour has two half hours. Thus, 24 hours have 48 half hours. Thus the number of bacteria in the community after 24 hours is 248 .
Explanation:
How many phenotypes are possible with 6 genes?
Answer: the correct option is 21.
Explanation:
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down menus to complete the statements.
In this experiment, the
was intentionally manipulated. This was the independent variable.
The dependent variable measured was the
.
The dependent variable has been the variable that has been studied while the independent variable has the variable that is being manipulated.
What is an experiment?
An experiment has been the process by which the scientists establish the relationship in between causes and the effects. There must be the dependent variable as well as an independent variable.
The dependent variable has been the variable that has been studied while the independent variable has the variable that must being manipulated.Throughout the reflection, that make sure you have the copy of the student Guide as well as your data tables.
Therefore, The dependent variable has been the variable that has been studied while the independent variable has the variable that is being manipulated.
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Answer:
1. fan speed
2. acceleration
Explanation:
since the answer was literally no where else..
What hurts more linework or shading?
Tattoo shading hurts more than the linework however it depends on the artist's skills.
Line work simply lacks the dimension that color and shading provide. Many people find that it hurts less than the outline because the skin is moved more evenly. However, once more, the artist's level of skill plays a significant role in this. Don't be afraid to look for a new tattoo artist if you're not sure who the best person is for the job. Because the outer portion of your shoulders has thick skin and few nerve endings, getting a tattoo there is one of the least painful places.
You should moisturize your new tattoo at least twice a day for the first two weeks (or until the healing process is complete). Numerous tattoo enthusiasts continue to moisturize their tattoos on a daily basis! Most of the time, the lotion is the best kind of moisturizer.
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in rabbits, full coat color (c) is the dominant trait. a second allele, chinchilla (cch) is recessive to full coat color. himalayan coat color (ch) is recessive to chinchilla and full coat colors, and albino (c) is recessive to all coat colors. if two chinchilla rabbits mate, what coat color is not possible in their offspring?
Full coat color is not possible in their offspring.
Which genotypes of rabbits with chinchilla coat colors are there in total?The coat color of a rabbit is determined by four alleles: albino, agouti, chinchilla, and Himalayan.The dominance hierarchy is C > cch > ch > c.There is a cross between an agouti rabbit as well as a chinchilla rabbit (cchc).
How might you explain the numerous alleles that affect rabbit coat color?Rabbits inherit their coat color through a combination of different alleles.This implies that a gene may have more alleles than just two.There are 4 alleles involved in the rabbit's coat color, and each one has a unique phenotypic.
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What is the difference between arteriosclerosis and Arteriolosclerosis?
Arteriosclerosis is the result of the accumulation of lipids, cholesterol, and other materials in and on the arterial walls. a buildup of cholesterol plaque in the artery walls that prevents blood flow. Arteriolosclerosis is the term used to describe the thickening of arterioles, especially when it is related to systemic arterial hypertension.
When the arteries—the blood channels that transport oxygen and nutrients from the heart to the rest of the body—become thick and stiff, blood flow to the organs and tissues may occasionally be restricted. This condition is known as arteriosclerosis. Flexible and elastic arteries indicate good health. However, the artery walls can stiffen over time, a phenomenon known as arterial hardening.
The term "arteriolosclerosis" refers to the histologic alterations that are frequently observed in the aged brain's deep penetrating tiny arteries, such as intimal degradation, smooth muscle degeneration, and fibrohyalinotic thickening of arterioles with subsequent narrowing of the arterial lumen.
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Lipids like those in butter can be broken down into the simple substances that make them up called.
How many syllables are there in each line of a traditional haiku?
The haiku is a three-line Japanese poem with seven syllables in the second line, five in the first, and five in the third.
haiku is a poetic form without rhyme that has 17 syllables and is written in three lines of 5, 7, and 5 syllables each. Although it did not become known as a haiku until the 19th century, the haiku first appeared in Japanese literature in the 17th century as a snappy response to elaborate poetic traditions.
Writers of haiku have traditionally focused on expressing empathetically suggestive vistas into natural phenomena. The 17th-century poet Bash popularized this method, many of whose haiku reflected his own emotional state when interacting with nature. Haiku subjects expanded beyond natural themes after the 19th century.
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Inside an active mitochondrion, most electrons follow which pathway?
a. glycolysis, NADH, oxidative phosphorylation, ATP, oxygen
b. citric acid cycle, FADH2, electron transport chain, ATP
c. electron transport chain, citric acid cycle, ATP, oxygen
d. pyruvate, citric acid cycle, ATP, NADH, oxygen
e. citric acid cycle, NADH, electron transport chain, oxygen
The majority of electrons in an active mitochondrion travel through which pathway: citric acid cycle, Nadph, aerobic respiration, and oxygen.
Unattached or attached to an atom, an electron is a negatively charged elementary particle (not bound). One of the three main types of atoms inside an atom, along with protons and neutrons, is indeed an electron that is linked to the atom. An atom's nucleus is made up of electrons, protons, and neutrons. The exterior of the nucleus is surrounded by negatively charged electrons in orbit. It can be challenging for scientists to monitor them since they rotate so quickly. They are the littlest particles in a particle and can fit 1 million of them into a central particle. People are drawn to the protons' positive charge.
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Are haiku poems only about nature?
No haiku poems aren't only about nature, Although many haikus focus on the expression of various emotions, such as love, sadness, and despair, they may also include images of nature.
Haikus are a type of poetry from Japan that is known for being short and easy to write. The fact that these brief poems have only three lines and 17 syllables in total forces the author to concentrate on the poem's language and diction. No, haikus don't need to be about nature. Although many haikus focus on the expression of various emotions, such as love, sadness, and despair, they may also include images of nature. Because they require only a few words to convey a unique image, haikus are a favorite among writers. Because the haiku is so minimalist, poets must keep their writing to the essentials and make each word or even syllable count.
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which statement about coronary blood flow is most accurate? normal resting coronary blood flow is 600 ml/min. the majority of coronary flow occurs during systole. the percentage decrease in epicardial flow is greater than the percentage decrease in subendocardial flow during systole. adenosine release will normally decrease coronary flow. epicardial flow is greater than the subendocardial flow.
Local oxygen demand is the key factor influencing coronary blood flow. The last common mechanism affecting vasomotor tone is the vascular endothelium.
Which is accurate regarding the coronary artery blood flow when at rest?At rest, the coronary arteries remove between 60% and 70% of the blood's oxygen. [1] This level of oxygen extraction demonstrates the myocardium's strong metabolic activity. It also emphasizes how critical it is to boost total coronary flow when myocardial oxygen demand is elevated.
What is the blood flow to the heart?The easiest way to define coronary vascular flow is as phasic flow since most anterograde blood flow to the heart occurs when the compressive forces of systole oppose the driving force for flow in the coronary circulation.
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Which is true of a positive feedback loop?
A. It causes products of a reaction to increase the reaction, moving away from equilibrium.
B. It only occurs in plants.
C. It helps the characteristic stay at equilibrium.
Answer: A. It causes products of a reaction to increase the reaction, moving away from equilibrium.
Explanation: In a natural system, a positive feedback loop magnifies or worsens the impacts of a little disturbance or change, which then cause the system to react. Each input and output in a biological system is a result of and contributes to a specific occurrence. A biological phenomenon known as a feedback loop occurs when a system's output either amplifies the system (positive feedback) or suppresses the system (negative feedback). The ability of feedback loops to help living things maintain homeostasis makes them crucial. The mechanism known as homeostasis helps us maintain a reasonably stable internal environment that is neither too hot nor too cold, neither too hungry nor too sleepy. Depending on the type of organism and the environment it lives in, different levels of energy are required to keep an organism in a state of homeostasis.
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Correctly label the following tissues of the digestive tract. Enteric nervous system Esophageal gland Parasympathetic ganglion of myenteric plexus Myenteric plexus Submucosal plexus Blood vessels Associated with regulating digestion ERITA IN
The digestive tract tissue consists of the Enteric Nervous System (Myenteric plexus, Submucosal plexus, and Parasympathetic ganglion of myenteric plexus), Esophageal Gland, and Blood Vessels.
The wall of the digestive tract is made of four layers of tissue. From the lumen of the digestive tract outward, these layers are:
1. Mucosa consists of the stratified squamous epithelium to facilitate the transport and absorption of digestive products; lamina propria in the form of sparse connective tissue; and the muscularis mucosae.
2. Submucosa consists of sparse connective tissue with lots of blood and lymph vessels; submucosal plexus (Meissner) as a regulator of digestive blood flow and controlling the function and secretion of epithelial cells; and lymphoid glands.
Another function of lymphatic nodules in the lamina propria and submucosa layers is as the body's defense system against virus and bacterial infections.
3. Muscularis consists of a layer of muscles for the independent movement of the mucous layer which then pushes and mixes food in the digestive tract; myenteric plexus (Auerbach) as a regulator of relaxation and contraction of the digestive wall; and blood and lymph vessels.
The myenteric plexus and the submucosal plexus regulate muscular contractions forming the parasympathetic ganglia which are the main components of the Enteric Nervous System.
4. Serosa, in the form of a thin layer consisting of sparse connective tissue; and simple squamous epithelium (mesothelium).
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