Wolves spread throughout most of north America and Eurasia through successive ice ages is true.
How are wolves distributed?The wolf's species distribution is known as the wolf distribution (Canis lupus). Wolves were first seen in North America above the 15th parallel north and in Eurasia above the 12th parallel north. However, due to cattle predation and the fear of wolf attacks on humans, deliberate human persecution has restricted the species' range to only approximately one-third of its original size.
Due to legal protection, changes in land use, and the migration of rural humans to cities, wolf population decreases have been halted since the 1970s, and this has encouraged recolonization and reintroduction in some areas of its previous range. The species is still under threat from habitat fragmentation, human competition for livestock and game species, and worries about wolves' potential threat to people.
Despite these dangers, the IUCN Red List rates the grey wolf as Least Concern due to its relatively large range and steady population. The African golden wolf (Canis lupaster), which lives north of the Sahara, and the Ethiopian wolf (Canis simensis), which lives in Ethiopia, make up the majority of the continent's wolf population.
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Complete Question:
Wolves spread throughout most of north america and eurasia through successive ice ages.
True
False
why might the cricket genome have eleven times as many base pairs as that of drosophila melanogaster?
There must be more non-coding DNA in crickets. The genome of the cricket may contain 11 times more base pairs than the genome of the Drosophila melanogaster.
What is DNA and what does it do?DNA is the molecule of information. It provides the knowledge required to produce proteins, another type of substantial molecule. Each of your cells contains 46 substantial structures genetic code that are distributed throughout these instructions. These chromosomes are made up of numerous smaller segments of DNA, called genes.
What are the three main goals of the DNA?Nowadays, DNA has three distinct functions: genetic, immune, and functional, all of which are significantly different between each other and rely on the letters and the sugar - phosphate backbone backbone in different ways. Ribonucleotide reductases in modern cells break down ribonucleotides di- or tri to produce DNA precursors.
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human chorionic gonadotropin helps to maintain the corpus luteum for the entire gestational period. t/f
Human chorionic gonadotropin is mostly produced by the syncytiotrophoblastic cells of the placenta during pregnancy. In the corpus luteum, the hormone stimulates the generation of progesterone.
What function does the corpus luteum serve?
The corpus luteum's function is to make your uterus a healthy environment for a fetus to develop, even though it is located inside your ovaries. It causes the production of the progesterone hormone, which gets your uterus ready for conception. Your corpus luteum disappears once it is no longer required for the production of progesterone.
What transpires to the corpus luteum in the absence of pregnancy?
If the egg is not fertilized, the corpus luteum undergoes its alternative fate. After ceasing to secrete progesterone, it will deteriorate and become a corpus albicans. This degradation typically takes place around
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a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift.target 1 of 5 2. in blank, a new species may arise as
In allopatric speciation, a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift.
Speciation is the phenomenon of formation of a new species from a group of individuals. Speciation is said to happen when the two population groups are not able to breed with each other. This reproductive isolation could be generated due to various reasons.
Genetic drift is the change in the gene frequency of a population by random chance. Genetic drift is only observed in small populations. The change in gene frequency usually results in the decrease of genes in the population.
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What are the benefits of classification?
Classification helps identification of organisms.
Benefits of classification:
To study live organisms conveniently, classification is required.It is vital to understand the many types of organisms.It facilitates accurate identification of different organisms.Understanding the history and evolution of organisms is useful.It aids in pointing the organism's precise categorization location.It aids in the formation of evolutionary connections between various groups of organisms.It facilitates understanding of organism evolution.Understanding the relationships between plants, animals, and other living things, as well as how they might serve humans, is beneficial.By observing a few organisms, it is possible to understand the characteristics of entire groups.It discusses the interactions between various species.To know more about Classification refer here:
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Most sympathetic effector junctions release norepinephrine but a significant number release acetylcholine instead. Which of these is an example of an organ of the cholinergic type?
A) the heart
B) a blood vessel in the skin
C) a sweat gland
D) the liver
E) the salivary glands
Most sympathetic effector junctions release norepinephrine but a significant number release acetylcholine instead. A sweat gland is an example of an organ of the cholinergic type. So option c. is correct.
Eccrine sweat glands occur over most of the body and extend directly onto the skin's surface. Apocrine glands open into the hair follicle, directing to the surface of the skin. One target organ of the cholinergic neurons is the eccrine sweat glands in the skin. A functional cholinergic innervation of sweat glands is a a requirement to yield and secrete sweat in most mammalian species, and swaeting can be potently obstructed by anticholinergic agents.
Sweat glands are coiled tubular structures crucial for regulating human body temperature.
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Why does it take 10 times more energy to grow a kilogram of beef than a kilogram of wheat? Wheat weighs less. Cattle eat only 10 percent of their body weight. Only 10 percent of wheat is digestible. Cattle only integrate 10 percent of their food into biomass.
Cattle only integrate 10 percent of their food into biomass. This is the reason why it takes 10 times more energy to grow a kilogram of beef than a kilogram of wheat.
Biomass contains chemical energy from the sun that has been stored. Photosynthesis is the process through which plants generate biomass. Biomass can be directly burnt for heat or transformed to renewable liquid and gaseous fuels via a variety of processes. Biomass encompasses both above- and belowground plant tissues, such as leaves, twigs, branches, and boles, as well as tree roots and grass rhizomes.
Biomass can be burned directly to provide heat, turned directly to electricity, or processed into biofuel (indirect). Biomass may be converted into energy through thermal conversion. Thermal conversion is the process of heating biomass feedstock to burn, dehydrate, or stabilise it. Methane generation is the biological process that converts animal waste into energy.
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a student observes the phenotypic traits of several hundred students at her school.which observation provides the strongest evidence that the genes encoding the two traits display genetic linkage?
most students that have black hair also have straight hair
Hair of type 1A is very fine, straight, and devoid of any wave or curl. Because it is so straight and delicate, it tends to look oily when the natural oils reach the ends. It is the most uncommon hair kind and is typical of Asian ladies.
One of the more noticeable characteristics of human variety is hair morphology, which is especially varied among people of European heritage, where about 45% of people have straight hair, 40% have wavy hair, and 15% have curly hair.
The MC1R gene is typically present in two functional copies, one from each parent. Due to the elevated levels of eumelanin, these people have black or brown hair. More than 90% of people in the globe are thought to have dark or black hair.
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he area around a charged object that can exert a force on other charged objects is an electric
.
Answer:
AN ELECTRIC FIELD
Explanation:
An electric field is a region around a charged object where the object's electric force is exerted on other charged objects. Electric fields get weaker the farther away they are from the charge
FILL IN THE BLANK. if a rational function is proper, then _______ is a horizontal asymptote.
if a rational function is proper, then y=0 is a horizontal asymptote.
A rational function's horizontal asymptote can be found by examining the degrees of the numerator and denominator. If N is the numerator's degree and D is the denominator's degree, and N D, then the horizontal asymptote is y = 0. Divide the numerator by the denominator to obtain the asymptote. The equation for the slant asymptote is the quotient.
A horizontal asymptote is a parallel line to which a portion of the curve is very close. However, a HA should never contact any section of the curve (but it may cross the curve). Example: Determine the horizontal asymptote of the function f(x) = 2x / 2. (x - 3). So y = 2 is the HA of the function.
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what type of transport is needed to move molecules of the substance from outside the cell to inside
write a summary statement for saturated fats including wether they are solids or liquids at room temperature and wether they have all single carbon to carbon bonds or at least one double carbon to carbon bond
Answer:
Explanation:
Saturated fats are a type of fat that is solid at room temperature and contains only single carbon-carbon bonds. These fats are typically derived from animal sources, such as meat and dairy products, and are commonly found in processed and fried foods. They are considered less healthy than unsaturated fats, which are typically liquid at room temperature and contain at least one double carbon-carbon bond, because they can raise cholesterol levels and increase the risk of heart disease. However, small amounts of saturated fats can be part of a healthy diet when consumed in moderation and paired with an overall healthy lifestyle.
if chlorophyll were red instead of green, making plants red in appearance, which color of light would you expect to produce the lowest rate of photosynthesis? white light blue light red light green light
If chlorophyll were red instead of green, making plants red in appearance Because the energy is at its peak in these light ranges, the higher on the light spectrum lights, like blue and violet, indicate the fastest rate of photosynthesis in plants.
Plants use the photosynthetic pigment chlorophyll, which absorbs light rays to use during photosynthesis (synthesis of glucose).
If a plant has red chlorophyll, it will only absorb red light and not any other hues of light. Red light therefore produces the least amount of photosynthesis.
Therefore, it would be expected that the red color of light would result in the lowest rate of photosynthesis if chlorophyll were red instead of green, giving plants a red appearance.
The process of producing carbohydrates (glucose) through photosynthesis uses sunlight that is captured by the chlorophyll pigment found in plant cells.
The primary photosynthetic pigment in plants, chlorophyll, absorbs light photons to carry out photosynthesis.
Any other colors of light besides red will not be absorbed by a plant if its chlorophyll is red. This indicates that plants will produce the least amount of photosynthesis when exposed to red light.
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superantigen type toxins lead to the release of excessive amounts of __________________ stimulating a hyperactive immune response that can lead to shock and death in the affected individual.
Superantigen type toxins lead to the release of excessive amounts of cytokines stimulating a hyperactive immune response that can lead to shock and death in the affected individual.
In the field of biology, such a kind of antigen that is responsible for the production of an excessive immune response is referred to as a superantigen.
As a result of superantigen-type toxins invading the body, more cytokines will be produced. This is because cytokines are sites of the body that are involved in the production of immune cells. Ahyperactivates immune response can be shocking for the body and the brain might pass a message to kill its own immune cells. Hence, this can lead to the death of an individual.
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which characteristic best describes vertebrates? vertebral column cranium blood containing hemoglobin live birth four-chambered heart
The presence of a vertebral column is the characteristic that best describes vertebrates.
A vertebral column distinguishes vertebrates from other animals. All vertebrates are chordates, and as such, they share the following distinguishing characteristics:
A stiff rod that runs the length of the animal (it could be the vertebral column or the notochord) Humans and all other vertebrates have a notochord when they are embryos, and it grows into the vertebral column eventually. The alimentary canal is located below the vertebral column, where a network of nerves runs above it. The animals have a mouth either directly below or at their anterior portion. The anus, which opens outward, is where the alimentary canal comes to an end. The anus is followed by the tail.
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describe the genetic mutations that you think occurred in the cancer cells that were responsible for the phenotypic differences between the healthy and cancer cells you observed.
Genetic mutations are changes in the genetic material of a cell that can cause alterations to its phenotype. The phenotypic differences between healthy and cancer cells can be attributed to a number of different types of genetic mutations that can occur in the cells.
The most common type of genetic mutation associated with cancer cells is the somatic mutation. This occurs when a single gene in the cell is mutated, leading to changes in the cell’s structure and function. Somatic mutations can lead to changes in the proteins produced by a cell, which can cause changes in the cell’s ability to divide, survive, or differentiate. These changes can lead to uncontrolled cell division, which is a major trait of cancer cells.
Another type of genetic mutation associated with cancer cells is chromosomal abnormalities. These occur when pieces of chromosomes are either missing or rearranged. Chromosomal abnormalities can lead to changes in the proteins produced by a cell, as well as changes in the expression of other genes. These changes can also lead to uncontrolled cell division, making them a common feature of cancer cells.
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how is a true breeding yellow-seeded pea plant different from a hybrid yellow-seeded pea plant?
A hybrid yellow-seeded pea plant possesses genotype (Aa) - one dominant, one recessive allele, whereas true-breeding yellow-seeded pea plants have (AA) - both dominant alleles.
Even though they have the same phenotypic, true breeding yellow-seeded pea plants differ from hybrid yellow-seeded pea plants because their genotypes are different.
They have the same genotype but different phenotypes, the same phenotype but different genotypes, the same genotype and phenotype, and they have a different genotype and phenotype.
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Where do bacteria live?
a) anywhere
b) in volcanoes
c) in salty water
d) almost anywhere
Answer:
d) almost anywhere
Explanation:
Bacteria can live almost anywhere, including in soil, water, and even in extreme environments such as hot springs and volcanic areas.
They are found in almost every habitat on Earth. Some bacteria can even live inside other organisms, such as plants and animals.
Answer:
à) anywhere
Explanation:
bacteria is found all over ..
which part of the electrical pathway of the heart sends nerve impulses to the ventricles and causes them to contract and pump blood?
Answer:
the sinus node
Explanation:
The sinus node
The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions. The atria are then activated. The electrical stimulus travels down through the conduction pathways and causes the heart's ventricles to contract and pump out blood
cellular respiration (3 of 5): acetyl coa formation and the citric acid cycle (bioflix tutorial)
The citric acid cycle and the production of acetyl-[tex]CoA[/tex] (also known as the Krebs cycle). The glycolysis-produced pyruvate is entirely oxidised [tex]CO_2[/tex] during these two phases, along with the formation of [tex]NADH[/tex], [tex]FADH_2[/tex], and some ATP. The numerous redox reactions that take place inside the citric acid cycle and its distinctive cyclic sequence of reactions.
All of the carbon atoms that enter cellular respiration in the glucose molecule are liberated [tex]CO_2[/tex] during the synthesis of acetyl [tex]CoA[/tex] and the citric acid cycle.
What are Acetyl and Citric acid?Acetyl is a functional group in organic chemistry with a chemical formula [tex]COCH_3[/tex] and the structural formula [tex]C(=O)CH_3[/tex]. Sometimes, the letter A is used to denote it (not to be confused with the element actinium). Although this name is rarely used, acetyl is referred to as ethanoyl in IUPAC nomenclature. A methyl group [tex](CH_3)[/tex] is single-bonded to a carbonyl [tex](C=O)[/tex] in the acetyl group. An acyl radical's carbonyl centre contains one unpaired electron, which it uses to bind chemically to the molecule's remaining R.
An organic compound [tex]HOC(CH_2CO_2H)_2[/tex] is a formula for citric acid. It is a weak organic acid that is colourless. Citrus fruits naturally contain it. It is a biochemical intermediary in the citric acid cycle, which is a component of all aerobic organisms' metabolism.
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if dna is damaged or incompletely replicated in s phase, the inhibition of which of these molecules prevents the cell from entering m phase?
a. Cdc6
b. Cdc25
c. S-Cdk
d.ORC
Answer:
CDK
Explanation:
If DNA is damaged or incompletely replicated in S phase, the inhibition of cyclin-dependent kinase (CDK) prevents the cell from entering M phase.
During S phase, the DNA of a cell is replicated in preparation for cell division. If this replication is incomplete or if the DNA is damaged, it can lead to problems with the cell's ability to divide properly. In such cases, the cell will not be able to enter M phase, which is the phase of the cell cycle in which the cell divides into two daughter cells.
One of the key molecules that controls the transition from S phase to M phase is cyclin-dependent kinase (CDK). CDK is an enzyme that plays a critical role in the regulation of the cell cycle. It is activated by a protein called cyclin, which is produced during S phase.
When DNA is damaged or incompletely replicated in S phase, the levels of cyclin are likely to be reduced. This, in turn, can lead to the inhibition of CDK, preventing the cell from entering M phase. As a result, the cell will not be able to divide properly, and this can have serious consequences for the health of the organism.
In summary, if DNA is damaged or incompletely replicated in S phase, the inhibition of CDK can prevent the cell from entering M phase. This helps to protect the organism from the potential harmful effects of damaged or incompletely replicated DNA.
FILL IN THE BLANK. we breathe primarily by using muscles that enclose the ____________ cavity.
Answer:
pleural cavity
Explanation:
pleural cavity
How do you communicate your findings and conclusions on the classification of organisms using appropriate scientific terminology and formats?
The best way to communicate findings and conclusions on the classification of organisms is by using accurate and specific scientific terminology and formats.
What is scientific terminology?Scientific terminology is the specialized language used to describe scientific concepts and processes. It is used in scientific writing, research, and communication. Scientific terminology is used to accurately communicate scientific knowledge, data, and results. It is important for scientists to use the correct scientific terminology to ensure accuracy and clarity in their work.
This could include using the scientific names for organisms, writing in a clear and concise manner, and utilizing appropriate tables, diagrams and graphs to illustrate the data. Additionally, citing relevant sources and providing an in-depth analysis of the data can help to further support the conclusions. Ultimately, it's important to communicate the findings and conclusions in a way that is both understandable and accurate.
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1. Which of the following hormone is expected to increase in the body after consuming a banana split?
(a) Growth hormone
(b) Testosterone
(c) Insulin
(d) Thyroid hormone
3. Finish the Punnett square showing two pink (RW) flowers crossed.
Answer:
results RR, RW, RW, WW
Explanation:
percentage of pink = 2/4 = 50%
percentage of white = 1/4 = 25%
percentage of red = 1/4=25%
what is upwelling (biology)
In biology, upwelling is the process by which deep, cold, nutrient-rich water rises to the surface of the ocean, often along the coastline. This occurs when the wind blows parallel to the coast and pushes the surface water away from the shore, allowing deeper water to rise to the surface.
Upwelling is an important process in the ocean because it brings nutrients from the deep ocean to the surface, where they can be used by phytoplankton and other small organisms. This, in turn, supports the growth of larger organisms such as fish, which depend on the phytoplankton as a food source. Upwelling also helps to cool the surface water and can have a significant impact on local climate and weather patterns.
large air tubes leading from the trachea to the lungs which convey air to and from the lungs; consist of primary, secondary or tertiary and right and left bronchioles t or f
Large air tubes leading from the trachea to the lungs which convey air to and from the lungs; consist of primary, secondary or tertiary and right and left bronchioles. The above statement is True.
The trachea splits into the right and left principal bronchi at the mediastinum at the level of the fifth thoracic vertebra. The bronchi split off into progressively smaller channels before coming to an end in tiny air sacs known as alveoli.
The primary bronchi's cartilage and mucous membrane resemble those of the trachea. The amount of hyaline cartilage in the walls reduces as the bronchial tree branches out until it is completely gone in the smallest bronchioles. The amount of smooth muscle grows as the cartilage decreases. The mucous membrane likewise passes through a change from simple cuboidal epithelium to simple squamous epithelium, which is ciliated pseudostratified columnar epithelium.
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which midbrain structures mediate visual reflexes? multiple choice question. medullary pyramids superior colliculi inferior colliculi thalamic nuclei
Superior colliculi is a midbrain str
structures mediate visual réflexes.
The rostral (front) hump on the lateral (side) portion of the midbrain is referred to as the superior colliculus. The tectum is actually made up of a pair of superior and inferior colliculi on either side of the midbrain.
A paired region in the rostral midbrain called the superior colliculus is responsible for integrating environmental cues and coordinating gaze adjustments including both eye and head movements.
It is believed to be involved in some reflexes, such as the head turning in response to visual (or other) cues, and some types of eye movements. The superior colliculus, however, has not been directly linked to any recognized clinical problem in humans.
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which trait is present in apes but absent in hominins? group of answer choices mesial bridge diastema gingival space dental gap previousnext
Great apes have a hole between the upper canines and molars to account for huge lower canines. In human advancement, teeth, jaws, and canines decreased in size, and people lost the diastema
Over numerous ages, early hominin legs developed longer and a lot further than their arms. Their feet turned out to be longer and created curves for more productive help of their bodies. Likewise, their hands turned out to be more capable of conveying and controlling items like apparatuses and food. Contrasted with present-day people, numerous hominins had toothier mouths. The "Nutcracker," (otherwise known as Paranthropus boisei), a hominin that lived 2.3 a long time back, had the biggest molars and thickest finish of any hominin. Homo erectus, which was experienced all around the world 1.5 a long time back, had bigger canines than present-day people.
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FILL IN THE BLANK. fungi are multicellular decomposers that obtain nutrients by _____________.
Fungi are multicellular decomposers that obtain nutrients by extracellular digestion.
Decomposing organisms eat dead things: animal feces and leaf litter are examples of dead plant materials. As the Earth's cleanup crew, they provide a valuable service. Dead leaves, insects, and animals would accumulate everywhere without decomposers.
Food is mechanically or acidically broken down outside the cell by special molecules called enzymes during extracellular digestion. The nearby cells can then take in the nutrients that have just been broken down. When fungi eat, they use extracellular digestion. The food is broken down into components that their cells can use by their teeth, enzymes, and acid in the stomach and enzymes in the small intestine.
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the phenotype of offspring would most likely be influenced by mutations during which biological process within the parent?
Answer:
Meiosis.
Explanation:
Meiosis is, by definition, "A special form of cell division in which each daughter cell receives half the amount of DNA as the parent cell", which is useful for mating and trait inheritance. For example, humans have haploid sperm and egg cells, which allows the resulting offspring to be diploid upon fusing of the two. Mitosis cannot be responsible for this, as in accord with what we know, DNA flows unidirectionally, with somatic cells not contributing to inheritance.
This could only mean that a mutation (e.g. Point, deletion, insertion, etc.) in the process of meiosis can cause changes in offspring phenotype.