Why would similarities in protein structure be a good indicator for relatedness between species?
The molecular comparisons between species genomes as well as the molecular comparison among single gene sequences are generally effective for determining relatedness between species.
To ascertain the link between the species and forecast the evolutionary evidence, these molecular correlations are usually utilized. The amino acid sequences of a representative protein found in the organisms may also be utilized to determine the relationship between the species in addition to the two methods mentioned above.
Living things are the essential biotic elements of an ecosystem, managing their functioning and regulating the ecological balance. They have more environmental significance on Earth since they are a crucial link in the food chain.
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true or false: the portion of the diencephalon, immediately inferior to the thalamus which contains ascending and descending tracts and the subthalamic nuclei is the hypothalamus.true false question.truefalse
False; the region of the diencephalon that is directly underneath the thalamus and comprises the subthalamic nuclei, ascending and descending pathways, is the hypothalamus.
The diencephalon's most inferior section is the hypothalamus. Subthalamic nuclei are absent from it. The central thalamus and epithalamus are formed by the lateral diencephalon walls in a superior fashion. The subthalamus and hypothalamus are formed beneath them. The components on each side of the third ventricle make up the thalamus, which serves as an anatomical marker. The diencephalon's subthalamic nucleus is a tiny lens-shaped structure situated close to the diencephalon's midbrain junction.
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HELP ASAP. Which description is true regarding fossils and phylogenetic trees of species that have lived on Earth?
O No species are extinct. Therefore, fossils are not needed to create phylogenetic trees.
O A few species are extinct. The fossils of these extinct species can be used to create phylogenetic trees.
Most species are extinct. To classify an extinct organism on a phylogenetic tree, the study of fossils is often required to determine the traits of extinct species.
Some species are extinct. Phylogenetic trees occasionally involve traits of extinct species whose traits require the study of fossils.
Answer: Most species are extinct. To classify an extinct organism on a phylogenetic tree, the study of fossils is often required to determine the traits of extinct species. is the right answer
Explanation:
on isle royale, if the moose population is very high, what would you expect to see with regard to other populations?
An ongoing observation of the wolf-moose relationship has confirmed that the 2 massive animals are uniquely interdependent. Wolves are the only herbal predator for the moose, and moose make up a few ninety percent of the wolves' diets (the relaxation is beavers and snowshoe hares).
The moose populace of Isle Royale has fluctuated over the years. for the reason that 1980, the population has been as low as 500 animals and as excessive as 2, four hundred. The fluctuation of the population is at once linked to the vegetation and predators of the island.
The Isle Royale wolf populace has changed over the years considering that their first immigration was in the past due 1940s. The wolf population declined extensively in 1980 and once more in 2012 because of a mixture of activities together with ailment, weather trade, random activities, and loss of genetic range.
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which statement is correct? which statement is correct? the greater the available surface area the lower the amount of gas exchange during internal respiration. during internal respiration, carbon dioxide is unloaded from the blood. during external respiration, oxygen is unloaded from the blood. during external respiration, equilibrium is reached for o2 when the partial pressure for o2 in the pulmonary capillaries and the alveoli are the same.
When the partial pressure for O2 in the pulmonary capillaries and the alveoli are equal, equilibrium for O2 is established during external breathing.
What role does blood play?Blood is essential to human life. Without blood, our bodies wouldn't be able to maintain our body temperature, fight infections, or eliminate waste products on our own. They also wouldn't be able to acquire the oxygen and nutrition they require to function.
What is blood composed of?Plasma and blood cells are the components of your blood. Your body functions normally thanks to the cooperation of its four primary constituents, platelets, red blood cells, white blood cells, and plasma. For your general health, each component is crucial and performs a key function. About 90% of human blood's liquid component, plasma, is water.
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comparisons of bone size and osteoarthritis between agriculturalists and their hunting and gathering ancestors indicate that agricultural populations generally engaged in more strenuous activities.
a. true
b. false
Bone size and osteoarthritis comparisons between agriculturalists and their hunting and gathering ancestors show that agricultural populations engaged in more strenuous activities. This statement is False.
The most common type of arthritis, affecting millions of people worldwide, is osteoarthritis. It happens over time as the protective cartilage that cushions the ends of the bones wears down. Although osteoarthritis can affect any joint, it most commonly affects the hands, knees, hips, and spine.
Previous joint injury, abnormal joint or limb development, and inherited factors are all potential causes. Overweight people, people with different leg lengths, and people who work in jobs that cause a lot of joint stress are at a higher risk. In contrast to rheumatoid arthritis, the joints in osteoarthritis do not become hot or red.
Treatment includes exercise, decreasing joint stress such as by rest or use of a cane, support groups, and pain medications. Another treatment option for osteoarthritis is stem cell transplantation, which involves injecting patients with allogenic mesenchymal stem cells or autologous chondrocytes.
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when an impulse reaches a synapse: group of answer choices two nerve fibers come in direct contact. impulses will pass in either direction. an electrical spark will jump the gap. chemical transmitters are released.
When an impulse reaches a synapse then chemical transmitters are released.
Neural signalling is a crucial type of communication occuring between brain and other organs. It involves neural cells that connect with other cells through synapse junction. The nerve impulse is the voltage change that passes through the axon and reaches the end.
Now to pass to the next neuron, impulse causes release and diffusion of neurotransmitters. The neurotransmitters are chemical messengers that are produced in body. Common examples of neurotransmitters are GABA, acetylcholine, serotonin and many more. Actions like blinking the eye, movement of hands are the response produced by brain signalling.
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The growth hormone axis contains at least one example of a negative feedback loop.
True or False
It is true that the growth hormone axis contains at least one example of a negative feedback loop.
Two different kinds of negative feedback loops are involved in controlling the hypothalamus-pituitary axis. Long-loop feedback and short-loop feedback are the two types.
The growth hormone-releasing hormone (GHRH) synthesis and secretion from the hypothalamus are blocked by pituitary hormones in short-loop feedback. This will result in the inhibition of GH secretion.
In long-loop feedback, the release of insulin-like growth factor 1 (IGF-1) from the endocrine part of the liver blocks the GHRH secretion and synthesis by the anterior pituitary and the hypothalamus. This also thus results in the inhibition of GH secretion.
Therefore, the statement is true.
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Both Gymnosperms and Angiosperms bear seeds, then why are they classified separately?
In gymnosperms the seeds are not produced inside the fruit but in angiosperms the seeds are enclosed inside the fruit so they are classified separately.
In general ,Gymnosperms are considered as flowerless plants and are not enclosed inside seeds whereas angiosperms are plants that have flowers. Adding to this, the difference or the basis of classification is on the presence of an ovary.
Hence, gymnosperms and angiosperms both bears seeds, and they are also classified differently . The reason behind this is in case of gymnosperms the seeds are not produced inside the fruit but in case of angiosperms the seeds are enclosed inside the fruit.
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______ occurs when impulses from an organ are perceived as originating from the skin.
Referred pain arises when impulses from some viscera are regarded as coming from skin dermatomes rather than the organ.
What is Referred pain?The activation of tactile receptors in the skin or subcutaneous layer usually causes feelings like touch, pressure, vibration, itch, and tickling.
It results from a network of sensory nerves that supply a variety of tissues and are interconnected.
Therefore, referred pain is pain that is felt elsewhere than where the painful stimuli or cause originated.
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Water and dissolved minerals are conducted from the roots to the stems and leaves via ___________, whereas sugar is conducted through specialized cells known as _____________
Water and dissolved minerals are conducted from the roots to the stems and leaves via xylem whereas sugar is conducted through specialized cells known as sieve cell.
The term “sieve” refers back to the cease partitions which can be pierced via way of means of clusters of pores via which the protoplasts of adjoining sieve tube contributors are interconnected. Xylem tissue transports water and vitamins from the roots to distinctive elements of the plant, and consists of vessel factors and tracheids, each of that are tubular, elongated cells that behavior water.
Xylem tissue conducts water and mineral vitamins from the soil upward in plant roots and stems. It consists of elongate cells with pointed ends referred to as tracheids, and shorter, wider cells referred to as vessel factors. The partitions of those cells are closely lignified, with openings withinside the partitions referred to as pits.
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Who has the right of way at an uncontrolled intersection in California?
When two vehicles reach an uncontrolled intersection at the same time, the vehicle on the right has the right of way in California.
Give way to cars and pedestrians on the through route at "T" crossings without "STOP" or "YIELD" signs. The path should be taken by them.
All approaching cars that are near enough to be dangerous must yield the right-of-way when you make a left. Search for motorcycles, bicycles, and pedestrians as well.
Keep your wheels pointed straight ahead as you wait to make a left turn until it is safe to begin the turn. You can be forced into oncoming traffic if you have your wheels oriented to the left and a car hits you from behind.
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What are the similarities and differences between DNA and RNA virus replication?
Both DNA replication and RNA replication are similar in their purposes. But they vary because of their location, the components, and the steps involved.
DNA replication is the process by which multiple copies of DNA are synthesized. RNA replication is the process by which genome-length RNA is synthesized.
The main aim of these two replications is to produce multiple copies of the genetic material. DNA replication takes place in the nucleus of the host cell. And RNA replication takes place in the cytoplasm of the host cell.
During DNA replication, the DNA virus uses host cell polymerase to produce multiple copies from the single strand of DNA. During RNA replication, the RNA undergoes transcription and replicates viral proteins. This mode is called RNA-dependent RNA synthesis.
RNA viruses also use reverse transcriptase enzymes to produce DNA from RNA. This mode is called RNA-dependent DNA synthesis.
The DNA copies synthesized are mostly stable and double-stranded, and the RNA copies are mostly unstable and single-stranded.
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most common compounds in all organisms?
Answer: oxygen and hydrogen
Explanation: oxygen is present about 62.8% in all living organisms and the main source is water and atmosphere while hydrogen comprises 9.3% and the main source is water
How many mph is 45km/s 1mile= 1.609 Kilometers
Answer:72.405
Explanation:
dentify the cranial nerve, which innervates intrinsic and extrinsic tongue muscles. Vagus Facial Glossopharyngeal Hypoglossal Trigeminal
The nerve that provides innervation to the intrinsic and extrinsic tongue muscles is the hypoglossal nerve.
Cranial nerves are nerves that support the function of the five senses and muscle movement by receiving stimuli and conveying information from the brain to be sent to other members of the body to respond. In the cranial nerves there is a type of XII nerve, namely the hypoglossal nerve which is responsible for the muscles in the tongue.
The hypoglossal nerve is located near the meridian line, cranial from the caudal border of the medulla oblongata until it almost reaches the border of the medulla oblongata and the pons. The hypoglossal nerve (CN XII) provides motor innervation to all the intrinsic and extrinsic muscles of the tongue. There are three extrinsic muscles in the tongue, namely the genloglossus, hypoglossus, and stylogossus which are also intervened by the hypoglossal nerve. The hypoglossal nerve will move the tongue muscles to start moving, swallowing and speaking.
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State one similarity and one difference between parasitic and predatory modes of feeding
Answer:
One similarity between parasitic and predatory modes of feeding is that both involve the ingestion of other organisms for nutrition. In both cases, the organisms that do the feeding (the parasites or predators) obtain their food from other organisms (the host or prey), which they consume and use to nourish themselves.
One difference between parasitic and predatory modes of feeding is the relationship between the predator and its prey. In predatory feeding, the predator and its prey are typically separate and distinct organisms, and the predator actively hunts and kills its prey for food. In parasitic feeding, the parasite and its host are typically closely associated, and the parasite typically lives on or inside the host, feeding off of its nutrients or tissues. This relationship between the parasite and its host is often harmful to the host, while the relationship between the predator and its prey is typically not harmful (as long as the predator is not over-consuming its prey).
dichotomous keys consist of a series of paired choices, called couplets, that reflect physical characteristics of the organism.
a. true
b. false
Couplets, or pairs of choices, are what make up dichotomous keys and they reflect the physical traits of the organism. So, it's true.
The couplets that make up traditional dichotomous keys are a collection of paired options. Each couplet gives the reader a choice between two distinct character sets that set one group of organisms apart from the other. Couplets, or pairs of choices, are what make up dichotomous keys and they reflect the physical traits of the organism. If Mean scratchy domestic us were the species name for a housecat.
Using a dichotomous key, one can identify things found in the natural world such trees, wildflowers, mammals, reptiles, rocks, and fish. Keys are made up of a succession of options that guide the user to the right name for a certain item. Dichotomous is a noun that implies "split into two sections." An instrument that aids in identifying an unidentified organism is a dichotomous key. A dichotomous key is a set of statements with two possible answers that list traits of the unknown entity.
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What kinds of cells engulf whatever foreign cells and molecules they encounter and recognize? Select one: a. phagocytic cells b. interferons c. platelets d. natural killer cells
Phagocytic cells engulf whatever foreign cells and molecules they encounter and recognize.
Phagocyte, type of cell that has the ability to ingest, and sometimes digest, foreign particles, such as bacteria, carbon, dust, or dye. By creating a vacuole around the foreign particle and expanding its cytoplasm into pseudopods (cytoplasmic appendages that resemble feet), it engulfs foreign objects. Because phagocytes send enzymes into the vacuole where digesting occurs, the ingested bacteria's poisons cannot harm the phagocyte as long as they are there. Neutrophilic leukocytes (microphages) and monocytes (macrophages), two categories of white blood cells, are phagocytic in the blood. Small, granular leukocytes called neutrophils quickly emerge at the site of an injury and devour germs.
Around three days after infection, monocytes, which are bigger and have a large, kidney-shaped nucleus, start to appear. They scavenge for bacteria, foreign objects, dead cells, and protozoa. The majority of phagocytic activity occurs among the cells, away from the circulatory system. For instance, fixed cells in the lymph nodes phagocytose foreign material in the lymphatic system; similarly, fixed cells in the spleen, liver, and bone marrow cleanse the vascular system by engulfing old red blood cells and foreign objects.
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Glycolysis, which provides energy by breaking down carbohydrates like glucose, relates to activities lasting __________.
Glycolysis, which provides energy by breaking down carbohydrates like glucose, relates to activities lasting generally less than 3 minutes.
The metabolic mechanism known as glycolysis is responsible for the transformation of glucose into pyruvate. This process results in the liberation of free energy, which is then put to use in the production of high-energy molecules such as adenosine triphosphate and reduced nicotinamide adenine dinucleotide. Enzymes are responsible for catalyzing each of the ten processes that make up glycolysis. It provides energy by breaking down carbohydrates like glucose and relates to activities lasting generally less than 3 minutes.
So option three minutes is the correct one.
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Are amino acids called polypeptides?
Of these influences, which appears to be the initial source of gender segregation? A) establishment of gender constancy. B) peer pressure
Differences in behavioral styles and interests appear to be the initial source of gender segregation.
The precept of Segregation describes about how pairs of gene variants are separated into reproductive cells. The segregation of gene versions referred to as alleles, and their corresponding trends changed first determined by using Gregor Mendel in 1865.
The law of segregation states that every person that could be a diploid has a pair of alleles (replica) for a specific trait. Each discerns passes an allele at random to their offspring resulting in a diploid organism.
Chromosome segregation—the partitioning of genetic material into two daughter cells—is one of the most critical techniques in cellular division.
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the mechanism that selects for antigen-reactive t cells that respond to foreign antigens while ignoring self-antigens is called clonal:___.
The mechanism that selects for antigen-reactive cells that respond to foreign antigens while ignoring self-antigens is called clonal selection.
According to the clonal selection theory, antigen selects lymphocytes for activation from a population of cells that have already committed to producing specific antibody. This theory assumes that antibody-forming cells are monospecific and have cell-surface receptors that can bind foreign antigens.
Clonal selection theory in immunology explains the functions of immune system cells in response to specific antigens invading the body. Random mutations during clonal expansion cause the production of B cells with increased antibody-binding affinity for their antigens during clonal selection. The clonal selection hypothesis could explain why secondary immune responses are so effective at preventing re-infection with the same pathogen.
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Which two forms of energy does the burning fire release?
The forms of energy does the burning fire release are radiant and chemical energy.
Oxygen helps the chemical approaches that arise at some point of hearthplace. When gasoline burns, it reacts with oxygen from the encompassing air, freeing warmness and producing combustion products (gases, smoke, embers, etc.). The real flames of the hearthplace are the discharge of a number of the warmth strength as light.
These additives have brought about the improvement of the 'hearthplace triangle' of gasoline, oxygen and warmness. Remove anybody of those and hearthplace can not preserve itself.
Chemical energy is transformed to thermal strength whilst human beings burn timber in a fire or burn fuel in a car's engine.For example, if you have a hearthplace burning to your fireplace, the chemical energy withinside the timber modifications into thermal (warmness) strength and radiant (light) strength.
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a researcher placed a culture of cyanobacteria under green lights. within a few weeks, the appearance of the cyanobacteria changed from green to red. the researcher claimed the color change in the culture was the result of an adaptation allowing greater photosynthesis.
The best reason to support this claim is that with green light, more phycoerythrin pigment molecules are produced and it enables more green light to be absorbed, thereby increasing the photosynthesis rate.
What is the photosynthesis rate?The photosynthesis rate is an expression that makes reference to the amount of photosynthetic products i.e. oxygen and simple carbs (glucose molecules) produced by a unit of time, which depends on the efficiency of the pigments that absorb sunlight during this process.
Therefore, with this data, we can see that the photosynthesis rate in a given environmental condition is highly variable but it depended on the amount of photons absorbed from the solar radiation, which depends on the amount of sunlight and also the classes or types of pigments that are present in the photosynthetic cells either plan cell or also the algae cells.
Complete question:
Cyanobacteria contain a variety of pigment molecules, as shown in Table 1. As a result, the color of cyanobacteria cultures can vary significantly based on the relative amount of each pigment produced.
A researcher placed a culture of cyanobacteria under green lights. Within a few weeks, the appearance of the cyanobacteria changed from green to red. The researcher claimed the color change in the culture was the result of an adaptation allowing greater photosynthesis.
Which of the following provides the best reasoning to justify the researcher's claim?
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Are all the molecules in the reactants of photosynthesis converted to products, or are some lost?
Which theory states that cells are the basic unit of life, organisms are made up of one or more cells, and all cells come only from other cells?
According to the unified cell theory, each living entity is made up of one or more cells, each cell is the building block of life, and new cells develop from existing cells.
Later, this idea benefited greatly from the contributions of Rudolf Virchow. Theodor Schwann put out the classical cell hypothesis in 1839. This theory consists of three components.
All creatures are composed of cells, according to the first section. The basic building blocks of life are cells, according to the second section.
According to the CELL THEORY, or cell theory, all creatures are made up of comparable organizational units called cells.
Schleiden & Schwann first publicly stated the idea in 1839, and it has been the cornerstone of contemporary biology ever since.
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environmental factors including natural disasters play a significant role in causing migration ? which of the following is nit an example of an environmetal push factor that could cause people to migrate to a new area
Environmental risks can be connected to migration as a demographic movement in numerous ways. On the one hand, nearby environmental risks may affect housing choices by influencing the appeal of specific locations.
What natural disasters' role in causing migration?
Conflict and migration are either directly or indirectly influenced by water stress. More people will experience water shortages and be compelled to relocate as water and climate extremes worsen.
Therefore, This translates to the fact that adverse climate shocks initially cause agriculture's productivity to decline, which then causes migration to rise.
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the enzyme acetylcholinesterase, located in the synaptic cleft and on the postsynaptic membrane, breaks ach down into acetate and choline, thereby stopping the stimulation of a postsynaptic cell. t or f
The enzyme acetylcholinesterase, located in the synaptic cleft and on the postsynaptic membrane, breaks ach down into acetate and choline, thereby stopping the stimulation of a postsynaptic cell. This statement is True.
By quickly hydrolyzing the neurotransmitter acetylcholine in a variety of cholinergic routes in the central and peripheral nervous systems, acetylcholinesterase participates in the termination of impulse transmission. The buildup of acetylcholine, hyperstimulation of nicotinic and muscarinic receptors, and disruption of neurotransmission are caused by the enzyme inactivation, which is triggered by a variety of inhibitors. As a result, acetylcholinesterase inhibitors are used as appropriate medications and poisons, with the enzyme functioning as their principal target. An overview of the toxicity and pharmacology of substances that inactivate acetylcholinesterase both temporarily and permanently.Additionally, the pharmacological management of organophosphate poisoning is discussed, with a focus on the administration of oxime reactivators of suppressed enzyme activity as causative medications after the poisoning. In addition, before reaching their targets in the nervous system, organophosphorus and carbamate pesticides can be detoxified in mammals through enzymatic hydrolysis. While carbamates are most efficiently broken down by carboxylesterases, organophosphates are most successfully detoxified by being broken down by the matching phosphodiesterase's.
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in diploid organisms, a pair of chromosomes that are the same size and shape and contain the same genes in the same positions.
Homologous chromosomes are pairs of chromosomes that are the same size and shape and contain the same genes in the same positions. They are found in diploid organisms and are derived from each parent.
Identical Chromosomes: A Mirror Image of GenesHomologous chromosomes.Homologous chromosomes are essential components of genetic inheritance. They are found in diploid organisms and contain a complete set of genes that are necessary for the organism's development. Each homologous chromosome is inherited from one parent, with the two chromosomes making up a chromosome pair.
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