Using the theories of harvesting, we got that selecting logging is the most sustainable and single-tree selection is the least sustainable harvesting method for tree.
Selective logging is most profitable timber-harvesting method, which explains its choice for economic reasons. However, this actually effect is short-term and disrupts forest health, alongside with other selective cutting negative impacts on the environment.
Single tree selection is a natural regeneration system that was pioneered here in the Lake States. Used primarily in northern hardwood forests, single tree selection is a cutting method designed to regenerate and maintain uneven-aged stand`s.
Hence, the most sustainable way to harvest trees is selective logging as it is economical, and the least sustainable way of harvesting is single-tree selection as it is practiced mainly naturally because of regeneration.
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Concept of artificial ecosystems
Hello..!
They are created with the intervention of the human being and can be modified at any time
Example:
Urban ecosystems; The gardensAgricultural ecosystems; the orchardswhich human skeletal muscle fiber has the highest oxidative capacity? select one: a. type iia b. type iib c. type i
Human skeletal muscle fiber has the highest oxidative capacity is type I.
Human skeletal muscle fibers are divided into 3 types of muscle fibers:Type I (slow twitch oxidative): This type of muscle fiber contains large amounts of oxidative enzymes large, which contract slowly and release energy gradually the needs required by the body in a state of activity.Type IIa (fast-twitch oxidative): This type of muscle fibers contracts quickly and release energy quickly, this is due to this type of muscle fibers containing more sarcoplasmic reticulum so that they are faster in releasing and taking back calcium ions, the structure of the myosin head is also slightly different than slow type muscle fibers causing muscle fibers it is more efficient at hydrolyzing ATP. Type IIb (fast twitch glycolytic): This type of fiber is the same as type IIa, the difference is that type IIb does not require oxygen while type IIa requires oxygen.Learn more about 3 types of muscle fibers here https://brainly.com/question/16951957
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a positive babinski's sign is seen when the lower motor neuron of the pyramidal pathway is damaged. true false
a positive babinski's sign is seen when the lower motor neuron of the pyramidal pathway is damaged. it is a false statement.
What is babinski's sign?A neuro-pathological cue included within the foot's Plantar Reflex is known as Babinski's sign. The typical adult Plantar Reflex is characterised by a downward flexion of the toes in the direction of the stimulus when it is elicited by a blunt stimulus to the sole of the foot. When the Hallux (big toe) extends dorsally in response to the same plantar stimulus, this is known as the Babinski's sign. Despite the fact that the plantar reflex in infants causes a reaction like the sign, Babinski's sign in adults can be an indication of corticospinal tract damage or a lesion, and recognition of the sign is still one of the least invasive ways to confirm a diagnosis of upper motor neuron injury.
The reflex hammer, created by Babinski in 1912 as a prototype, became one of a modern neurologist's indispensable tools as the sign became so ingrained in neurological doctrine. Babinski's sign is still referred to as "the most colourful exam finding in neurology" in current neurological examination texts. All things considered, Babinski's sign and other tests of the plantar reflex (such as the Chaddock sign and Cornell sign) serve as helpful reminders of the value of a thorough physical examination and the fact that, with the right care and attention to detail, a doctor can confidently make diagnoses using simple, concise, and interactive methods.
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Which statement best describes reproduction with two parents?
A. Smaller yeast cells grow on the side of a larger yeast cell.
B. New African violet plants can grow from leaves cut off of existing
plants.
C. Many tadpoles hatch from a cluster of eggs fertilized by cells from
a male frog.
O
D. Small sea stars can grow from arms that break off of a large sea
star.
Variation and survival - Extended Task
Research and answer this question.
What are the advantages and disadvantages of variation to the survival of orangutans?
The advantages and disadvantages of genetic variation to the survival of orangutans are:
Advantages:
Because of variation, organisms can evolve to survive in challenging environments and become more resistant to diseases. It also fosters diversity.Disadvantages:
Negative effects, such as genetic disorders and diseases, are another potential drawbackWhat is genetic variation?
DNA sequence variations among members of a population are referred to as genetic variation. Sperm and egg cells, as well as somatic (all other) cells, are subject to variation.Three separate processes contribute to genetic diversity: gene recombination, gene migration, and mutation. Genetic variety and evolution are propelled by mutation. Base substitutions, deletions, and insertions are the different kinds of DNA mutations.Due to deforestation, illegal hunting, and forest fires that have decimated orang-utan wild populations, one of the most thorough genome analyses of orang gutans to date has revealed that its tiny populations are surprisingly genetically diverse. This raises the possibility that the critically endangered species could recover from its current dire situation.
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when people have a bacterial infection, pyrogens are often released to maintain elevated body temperature, which helps kill the bacteria causing the infection. which answer option is the most likely action of pyrogens on thermoregulation?
The most likely action of pyrogens on thermoregulation is that these substances will reset the set point of the sensors and cause the death of the bacteria.
Endogenous pyrogens are substances that are released into the blood when phagocytic leukocytes kill a bacterium. The hypothalamus receives these pyrogens and the thermostat (sensors) is reset. This enables the condition known as a fever, in which the body's temperature rises. A nutrient required by bacteria is reduced as a result of iron becoming more conserved when body temperature rises.
The pathogen may also be killed by heat itself. The hypothalamus regulates body temperature through reflexes that result in sweating and vasodilation when the body is too warm or shivering and vasoconstriction when the body is too cold. It responds to bodily substances.
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why do humans suffer from sleepiness, decreased muscle activity, and decreased sex drive during illness? group of answer choices the virus saps the organism's energy and uses it to attack the body. an illness decreases blood flow to the brain and muscles. they are useful ways of conserving energy while the body is attacking the illness. the body is so weakened from illness that it cannot do much of anything.
Humans suffer from these shortcomings during sickness as they are useful ways to conserve energy while the body is fighting the sickness.
How does our body fight illness?
Keeping foreign things out of our body is the most general way for our body to fight illness. This is the primary job of the immune system of our body.
Our primary defense against harmful things is the physical barriers, like skin. Our body also produces chemicals that destroy pathogens like, lysozyme that are found on skinless parts of our body, which includes tears and mucus membranes.
As long as the immune system works smoothly, we don’t even notice its presence. But the reason we get ill/sick is when it stops working properly. This is due to a weak immune system or harmful aggressive bacteria.
Without our immune system, we would be susceptible to all and every harmful pathogen.
Hence, when we get sick, we suffer with things like decreased muscle activity, sleepiness etc as our body is conserving energy as it fights off the illness.
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all of the following occur during mitosis except a.the coiling of chromosomes. b.the formation of a spindle. c.the synthesis of dna. d.the degradation of the nuclear envelope.
The Synthesis of DNA do not occur during mitosis .
Mitosis is the process through which a mobile replicates its chromosomes and then segregates them, producing identical nuclei in coaching for cellular department. Mitosis is usually followed with the aid of equal department of the mobile's content into daughter cells which have equal genomes.
At some point of mitosis, a cell duplicates all of its contents, which includes its chromosomes, and splits to form identical daughter cells. because this procedure is so critical, the stairs of mitosis are cautiously controlled with the aid of certain genes.
It's far crucial that the daughter cells have a duplicate of each chromosome, so the procedure entails copying the chromosomes first after which cautiously isolating the copies to present each new cell a full set, before mitosis, the chromosomes are copied.
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A sequence of biotic changes that regenerate or create an ecological community is known as?.
A sequence of biotic changes that regenerate or create an ecological community is known as Succession.
Ecological succession is the gradual evolution of a community's constituent species over time. The process by which a region's species and habitat mix evolves over time is called ecological succession. These communities gradually replace one another until a "climax community" is attained, such as a mature forest, or until a disruption, such as a fire, happens. A key idea in ecology is ecological succession.
Nudation, Invasion, Competition and Co-action, Reaction, and Climax or Stabilization are the five stages of succession. At the same location, a succession of biotic communities organically emerge one after another until the Climax stage is reached. In their early stages, biotic communities evolve slowly.
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the evolution of decreased virulence would be expected in a no, that's not the correct answer. a. horizontally transmitted parasite. b. parasite species in which multiple infection is frequent. c. host with an effective immune system. d. vertically transmitted parasite.
Evolution of decreased virulence would be expected in a no of vertically transmitted parasite.
Virulence is defined by the ability of a microorganism to cause disease in the host . Parasites get transmitted from a parent to its offspring at or before birth, this case is called vertical transmission of parasite.
When , parasites are transmitted by contact from an infected individual to an uninfected individual, in that case the transmission is said to be horizontal. For example ,vertically transmitted can be disease caused by virus or bacteria that is transferred from mother to child .
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identify the major structures and functional areas of the cerebral cortex and cerebrum including the basal nuclei
The cerebrum, cerebellum, and brainstem are the three major components of the brain. The brain's main structure, the cerebrum, is made up of the right & left halves.
Describe the cortex.Your cerebral cortex, which is located on atop of your cerebrum, is its outer layer. The greatest part of your brain is called your cerebrum. The corpus callosum, a network of nerve fibers, connects the hemispheres together.
What bodily organ is the cortex?The term "cortex," which is Latin for "bark," refers to the cerebrum's outer layer of gray matter. Due to it's own folds, the brain has a huge surface area and makes up nearly half of the weight of the brain. There are two parts to the cerebral cortex:
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as a teaching assistant, you must gather examples of deuterostomes from a large, unorganized selection of animals. which specimens should you select? (check all that apply.)
Echinoderms, ray-finned fishes, and tetrapod are the vertebrate groupings with the largest species diversity among the deuterostome lineages.
Specimens you should select :
1. Echinoderms (sea stars and sea urchins)
2. Hemichordates ("acorn worms that burrow in marine sands or mud)
3. Xenoturbellids
4. Chordata
These animals make up the Bilaterian, a collection of creatures with bilateral symmetry and three germ layers, together with Protostome and its outgroup Xenacoelomorphia.
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BRAINLIESTTT ASAP!!!
-recognize the names and relative ages of extinct hominids ( EXPLAIN THEM )
The group made up of all of our close relatives as well as extinct entire human race and current humans.
Which came first, hominids or hominins?Modern humans as well as all our extinct relatives on our own branching of the phylogenetic ladder are now referred to as hominins instead of hominids, as they were in previous classifications.
Exist hominins today?The hominins, a term used to describe a broad group of extinct humans and apes with human features, are now exclusively recognized as Homo sapiens. Around 20 species are included in this category, and there are likely many more that are still undiscovered. You might also be interested in: Human proximity changes animals.
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What is the difference between active and passive transport?
A. Active transport can only move SMALL molecules.
B. Active transport does NOT use energy.
C. Active transport uses DIFFUSION to move molecules across the cell membrane.
D. Active transport USES energy.
which component of the epidermis initiates immune responses and provides a defense against environmental antigens?
Answer:
Which component of the epidermis initiates immune responses and provides a defense against environmental antigens?
~Langerhans cells~
Explanation:
Which of the following affects recreational activities that people do in a region?
A.
soil type
B.
plants
C.
presence and quality of water
D.
oil
Answer:
A. Soil Type, B. Plants, and C. Presence and Quality of Water
Explanation:
A) Soil contains air, water, and minerals as well as plant and animal matter, both living and dead, which is why it must be the first answer
B) Plant Elements include nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, chlorine, iron, manganese, zinc, copper, molybdenum, and nickel. It is used for photosynthesis
C) Do i really need to explain this one?
17.plants containing only chlorophyll b are exposed to radiation with the following wavelengths: 10nm(x-rays), 450nm (blue light), 670nm (red light), 670nm (red light), and 800nm (infrared light). which plants harness (use) the most energy for photosynthesis? blue light irradiated plants.
The greatest energy is captured (used) for photosynthesis by plants exposed to blue light.
Platids, which can be rounded, oval, or disk-shaped bodies and are used in the synthesis and storage of food, include chloroplasts. The presence of the two pigments chlorophyll a and chlorophyll b gives chloroplasts their distinctive green colour, which sets them apart from other plastid types. The pigments' ability to absorb light energy for photosynthesis is one of their functions. The chloroplasts include other pigments, such as carotenoids, which act as accessory pigments by absorbing sun energy and transferring it to the chlorophyll. All green tissues in plants have chloroplasts, although they are notably dense in the parenchyma cells of the leaf mesophyll.
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What would be a good title for the graph? Pls help due today
Summarize Your Data in Plain English.
Left Justify Chart Captions Below Figure.
Keep Chart Captions Simple and Short.
Simplify Your Information.
Include Units of Representation.
Don't Forget Time Period!
which type of muscle would you expect to be guarding the opening between the stomach and the small intestine?
The muscle that guards the gap between the stomach and small intestine is known as a sphincter or circular muscle.
What is the function of smooth muscle?In the cardiovascular system, smooth muscle is utilized in vessels to control blood pressure and flow; in the lungs, it opens and closes airways; in the gastrointestinal system, it contributes to motility and nutrition absorption; and yet it still has functions in nearly every other organ system.
Your digestive tract is made up of what kind of muscle?The uterus, the digestive tract, and blood veins like arteries are just a few of the interior tissues that contain smooth muscle. Wave-like contractions occur down the length of the structure's smooth muscle, which is structured in stacked sheets.
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what are the similarities and differences you observe between the anatomy of the sheep brain and the anatomy of the human brain? what structures were you able to visualize over the course of the dissection?
Similarities and differences between sheep and Human brain:
Similarities:
The sheep brain is similar to the human brain in having two brain stems, two optic nerves and two hemispheres.
Differences:
Compared to a sheep's brain, the human brain is larger and heavier. In comparison to the human brain, the olfactory bulb is more developed in the sheep's brain. The shape of the sheep's brain is elongated, whereas the human brain is spherical. The frontal lobe of the human brain is bigger than that of the sheep's brain. The main distinction between the human and sheep brains is that humans can use their brains to think, innovate, but sheep cannot.
Over the course of dissection structures visualizes include; cerebrum, cerebellum, brain stem, Hypothalamus, Pituitary gland, Pineal gland, Thalamus etc.
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ellie may, a mother with type b blood, has a child with type o blood. she claims that jethro, who has type a blood, is the father. he claims that he cannot possibly be the father. further, blood tests ordered by maury povich reveal that the father is homozygous. judge joe brown rules that:
In addition, Maury povich's blood tests show that the father is homozygous. The Jerry Springer show should be called, according to judge Joe Brown, who agrees with Jethro.
What is often examined during a blood test?Blood tests are frequently performed. Find out how well-functioning organs like your kidneys, liver, heart, or thyroid are, as directed by healthcare professionals. aid in the diagnosis of illnesses like HIV/AIDS, diabetes, coronary heart disease, and cancer.
What activities are prohibited prior to a blood test?Avoiding certain meals and beverages, such as alcohol, grilled meats, and herbal tea. avoiding overindulging the day before a test. not a smoker. avoiding certain actions, such as engaging in sexual activity or hard exercise.
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PLEASE HELPPPPP
Identify the process that occurs in this organelle, and explain the importance of this process to the survival
of organisms.
Answer:
Explanation:
its c
which of the following is true about pepsin? select one: a. most pepsin is released directly from chief cells b. pepsin is most active at high ph c. pepsin accelerate protein digestion d. pepsin accelerates fat digestion
The true statement about pepsin is: (d) pepsin accelerates fat digestion.
Pepsin is the digestive enzyme. It has the precursor called pepsinogen which is released from the chief cells. The site of action of the enzyme is the stomach that has an acidic environment. The pepsin enzyme is involved in the digestion of fats.
Digestion is the process of ingesting food in the form of large macromolecules into smaller soluble molecules. In this, the large carbohydrates, proteins and fats are broken down. For this a complete digestive system is present inside the body with several organs, enzymes and hormones involved.
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what is the most important negative effect of exposure to uv radiation in terms of reproductive success?
Exposure UV radiation have a high negative effect on reproductive success.
On live cells, ultraviolet light has several detrimental effects. A living cell exposed to UV light for an extended period of time frequently experiences changes in how the cell works as well as gene changes that result in cancer.
Sometimes, if it comes into touch with human skin, it usually results in rashes, ulcers, itching, burning, and redness.
What is reproductive success?
The number of offspring a person produces during a breeding event or lifetime is referred to as reproductive success. This is not constrained by the quantity of offspring one individual produces, but also by the ability of these offspring to reproduce.
What are UV radiations?
The sun and artificial sources, such tanning beds, both emit ultraviolet (UV) radiation, a type of non-ionizing radiation.
UV radiation overexposure can cause major health problems,
However, if it comes into touch with the skin for a long time and in high doses, skin cancer will result.
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Which type of mutation causes cystic fibrosis?
Answer: cystic fibrosis transmembrane conductance regulator (CFTR) gene.
Explanation:
Hello!
The type of mutation which causes cystic fibrosis is a mutation in the CFTR gene. (Cystic Fibrosis Transmembrane Conductance Regulator)
Hope this helps!
Besides the supinator, which other muscle is a powerful supinator of the forearm?.
Besides the supinator, the other muscle that is a powerful supinator of the forearm is: the biceps brachii. The biceps brachii is responsible for elbow flexion and forearm supination.
What is the biceps brachii?The biceps brachii is a large, thick muscle on the front of our upper arm that is located between the shoulder and the elbow. This muscle often looks like a horseshoe shape. The biceps brachii’s primary function is as an extension of the elbow joint.
While the biceps are located on the front upper arm, there are other muscles known as the triceps on the back of the upper arm, which are responsible for arm extension.
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which would be the route taken by lymph traveling from lymphatic vessels in the right leg to the bloodstream?
The left subclavian vein; the right lumbar trunk; the cisterna chyli; and the thoracic duct. blood from lymph system in the right leg.
What does the body's lymph do?Lymph: The excess fluid that leaks out of cells and tissues but is not recycled back into capillaries is what is referred to as lymph, also known as lymphatic fluid.
Lymph node cancer?A tumor of the lymph system, which is a component of the body's defense against infection, is lymphoma. The spleen, thymus gland, lymph (lymph glands), and bone marrow are all components of the lymphatic system. All of those locations, in addition to other organs in the body, can be impacted by lymphoma.
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The Three Domain classification system developed by Dr. Woese is based partly on
O sensitivity to antivirals.
O RNA sequences.
O enzyme similarities.
O DNA sequences.
Dr. Woese's three Domain classification approach is partially based on RNA sequences. The three-domain classification system was put forward as an alternative to the conventional prokaryote-eukaryote and five-kingdom concepts.
Organisms can be divided into one of three domains according to differences in the ribosomal RNA (rRNA) nucleotide sequences, antibiotic susceptibility, and membrane lipid structures. Woese divided them into groups based on differences in the 16S ribosomal RNA (rRNA) structure. Carl Woese from the University of Illinois in the United States proposed a phylogenetic taxonomy of bacterial species in 1987 using variations in the nucleotide sequence of 16S rRNA molecules.
Thus, we can conclude that RNA sequences serve as a foundation for some of Dr. Woese's Three Domain classification methods. Eukarya, Bacteria, and Archaea are the three domains.
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what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? view available hint(s)for part a what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? a deletion a nondisjunction an inversion a translocation polyploidy
Inversion results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction.
So, the correct option is C.
An inverted DNA sequence is one that has been broken off from a chromosome, reversed against the native genetic sequence that was previously present in the genome, and then reattached. It leads to the chromosomal anomaly known as inversion. A chromosome breaks in two places and the resultant piece of DNA is reversed and reinserted into the chromosome. This is known as an inversion. The chromosomal breaks might result in the loss or gain of genetic material.
A chromosomal inversion is a rearrangement in which one end of a chromosome is flipped from the other. When a single chromosome breaks and rearranges itself, it results in an inversion. Paracentric and pericentric inversions are the two sorts.
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a cricket has a diploid genome of 1.2 billion base pairs. assume that there are about 200,000 individuals in the population and that the mutation rate is one per 100 million base pairs. on average, how many new mutations will occur in an individual cricket?
New mutations will occur in 2,400,000 crickets.
Information given in the question:
There are 1.2 billion base pairs in the cricket's diploid genome.There are 200,000 people in the population.1 mutation per 100 million base pairs is the mutation rate.Therefore,
Number of mutations per individual = Total number of bases × Mutation rate= 1.2 billion × 1 per 100 million base pairs
= 1,200,000,000 × (1 ÷ 100,000,000 )
= 12 mutations per individual
Therefore,
Number of new mutations in the given population= Number of Mutations per Individual ×Total Number of Individuals
= 12 × 200,000
= 2,400,000
New mutations will occur in 2,400,000 crickets.
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