The main 2 observation which Lamarck made is:
1. Use and Disuse of Organ
2. Inheritance of Acquired Characters.
The Use and Disuse of Organ states that, only those character will last longer or pass on to next generation which are getting in use day by day. And, the organ will vanish if it not in use. Like, Tail in Human.
Inheritance of Acquired Characters, a theory that suggests physiological changes that an organism acquires throughout the course of its existence might be passed on to children. It's often referred to as the theory of adaptation or Lamarckism, after French biologist Jean-Baptiste Lamarck's theory of evolution.
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Whenever one turns the pages of a book, uses a pen to take notes, or raises one's hand, one's actions are made possible by the _____ nervous system.
Whenever you turn the pages of a book, use your pen to take notes, or raise your hand, you know that this is possible due to your somatic nervous system
What is Somatic nervous system ?The peripheral nervous system, which permeates practically every portion of your body, is divided into the somatic nervous system. This system's nerves transmit data from your senses to your brain. They also transmit orders from your brain to your muscles, allowing you to move.
The sensory-somatic nervous system is made up of the cranial and spinal nerves, and the autonomic nervous system, which connects the central nervous system (CNS) to the internal organs, is made up of sensory and motor neurons.The somatic nervous system regulates voluntary movements, sends and receives sensory information, and participates in reflex actions independently of the central nervous system (CNS), allowing for extremely rapid reflex occurrence. Additionally, they have a track record of accurately predicting crucial life outcomes like education and health.Learn more about Somatic nervous system here:
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What are the characteristics of white and gray rami in the sympathetic nervous system?
White rami are preganglionic sympathetic neurons from the T1-L2 spinal nerves. Gray rami are postganglionic sympathetic neurons that link to all spinal nerves. somatic nervous system features (SNS).
What makes up the nervous system?There are two primary sections of the nervous system: The brain and spinal cord make up the central nervous system. All of the body's parts are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system.
What role does the nervous system play?The nervous system facilitates communication between all body parts. In addition, it responds to alterations both inside and outside the body. The nervous system transmits and receives information using both chemical and electrical methods.
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HELP ME OUT ASPPP YOU WILL GET BRAINEST AND 20 points
Answer:
Electron
Explanation:
Electrons are on the outside protons and neutrons are in the middle
The bladder is in the _____ region. a. hypogastric b. right lumbar c. left lumbar d. epigastric
The bladder is in the hypogastric region.
Hypogastric Region- The structures around the pelvic bone are located in the hypogastric area. These include the prostate in men and the womb and ovaries in women, as well as the bladder, a section of the colon and rectum, the anus, and several reproductive system organs.
Bladder- A little above and behind pubic bone in the pelvis, the urine bladder is a muscular sac. The bladder is roughly the size and shape of a pear when it is empty. The kidneys produce urine, which then passes via capillary called ureters and into the bladder. Urination can be restricted and rare because to the bladder's ability to hold pee.
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A cancer drug interferes with the development of mitotic spindle fibers during cell division. which phase is directly affected?
A cancer drug interferes with the development of mitotic spindle fibers during cell division prophase phase is directly affected.
Which cells undergo mitotic?Only eukaryotic cells go through mitosis. Binary fission is a distinct technique used to split prokaryotic cells, which are cells without nuclei. Different organisms go through different stages of mitosis.
Why is mitotic important?Multicellular creatures depend on mitosis to produce new cells for growth and to replace damaged or worn-out cells, such as skin cells. Many single-celled organisms use mitosis as their primary asexual reproduction method.
What are the four roles that mitotic plays?Tissue replacement or repair.Organismal growth.Unmarried reproductionDevelopment (of embryos)To know more about Mitotic visit:
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What structure appears to be underdeveloped or missing in the microtubules of the sperm flagellum affected by kartagener syndrome?
The Pairs of microtubules structure appears to be underdeveloped or missing in the microtubules of the sperm flagellum affected by kartagener syndrome.
Kartagener syndrome is a subset of PCD and consists of the triad of situs inversus, bronchiectasis, and chronic sinusitis.About 90% of the sperm's length is made up of the flagellum, which also comprises axoneme and peri-axoneme structures including the fibrous sheath, outer dense fibres, and the mitochondrial sheath. The flagellum is also where the sperm's ability to move is controlled.Microtubules determine the functional capacity of sperm since they are essential for organelle transport and cellular divisions during spermatogenesis and the sperm motility process. Axoneme and manchette, which are microtubule-based structures, are also essential for the development of the sperm head and tail.To learn more about sperm.
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Which is made by weathering?
Options:
A:magm
B: ash
C: sediments
D: minerals
Answer:
C
Explanation:
Weathering is the breaking down of rock particles into smaller particles. sediments are made from weathering
Yeast cells are typically observed under 40x objective. the total magnification of the specimen is?
Multiplying the magnifications of the objective and optical lenses yields the overall magnification of a microscope.
To calculate the overall magnification, you must first determine the optical lens's power of magnification.
Ordinarily, the ocular lens magnifies ten times.
Check the objective lens's magnification capacity. The magnification is printed on the side of the lens. The previous value may have been 4X, 10X, 40X, or 100X.
The compound light microscope's overall magnification is calculated by dividing the power of the ocular lens by the power of the objective lens. For instance, using a 10X ocular and a 40X objective would result in a 400X total magnification. The compound light microscope can magnify objects up to a maximum of 1000X.
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Diffusion continues to occur until there is an equal concentration of particles on both sides of a semi-permeable membrane. True or false?.
Answer: True
Explanation:
which of these is a neural change that continues throughout life? plasticity action potential axon all-or-none response
A neural change that continues throughout life it is also known as Neural plasticity or neuroplasticity.
Neural plasticity is defined as the ability of the nervous system to change its activities in response to experience. ‘Neuro’ means neurons that are specialized cells which are used for the transmission of nerve impulses; ‘Plasticity’ means being easily shaped or moulded.
Plasticity is a neural change that continues throughout life. It is used to change or rewire the neuronal mapping of the brain. Neuroplasticity helps your brain to adapt the ability of learning about new things. It helps to boost or enhance brain's activity.
There are two types of brain plasticity.
* Structural Plasticity = It is used to change the physical structure of brain
*Functional Plasticity= It is used to takes up a new function in place of a damaged area of the brain
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Plant A is receiving sunlight , soil, and regular water, plant B is also receiving sunlight, soil, and regular water. Yet Plant B is ALSO getting fertilizer. Write a hypothesis of what will happen to the plants as they grow over the next few weeks. Hypothesis
A hypothesis expresses clearly the relationship between two variables and what is expected to occur. If plants receive fertilizer, then they will grow taller than plants that do not receive fertilizer.
What is a hypothesis?
When following the scientific methodology, researchers must formulate a hypothesis.
A hypothesis is a scientific conjecture, not verified, that requires corroboration. It is a possibility, not a fact. It is a claim of how it works a relationship between two or more variables.
The researcher hypothesizes to predict what is going on or what is expected to occur.
A hypothesis must,
be clear and comprehensive.express the direct relationship between the involved variables.be objective.be testeable and falsifiableThere are different kinds of hypotheses: descriptive, correlative, differentiative, or causative.
In the exposed example we have
plants A and B exposed to the same environmental conditions ⇒ sunlight , soil, and water.plant B receiving fertilizerThe variables are,
Controlled variables: sunlight , soil, and regular waterIndependent variable: fertilizer presence/absenceDependent variable: plant growthThe hypothesis must explain the relationship of the dependent and independent variables as a cause and effect event. So,
If plants receive fertilizer, then they will grow taller than plants that do not receive fertilizer.
There are several ways in which you can propose a hypothesis like this one. You just need to make sure both variables are mentioned and what the effect of the independent on the dependent variable is.
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Abnormal levels of __________ may lead to schizophrenia and parkinson’s disease. a. gaba (gamma-aminobutyric acid) b. glutamate c. serotonin d. dopamine please select the best answer from the choices provided a b c d
Answer:
The answer is D. Dopamine.
Explanation:
A neurotransmitter generated in the region of the CNS is called dopamine (CNS).This is a hormone which brain produces that permits neurons to link, which is crucial for the body's neuro-muscular activity. Parkinson is caused by the bulk of the dopamine-producing cells being destroyed, which results in an inability to regulate one's voluntary movements; schizophrenia is caused by an overabundance of dopamine.
It affects a variety of vital bodily processes, such as mobility, memory, rewarding pleasure, and motivation. Numerous neurological & mental health conditions are correlated to dopamine levels that are high or low.
Humans can experience pleasure, happiness, and motivation due to dopamine. When you accomplish something, your brain releases more dopamine, which makes them feel happy.
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Tremors at rest, rigidity, akinesia, and postural abnormalities are a result of the atrophy of neurons in which part of the brain?
Tremors at rest, rigidity, akinesia, and postural abnormalities are a result of the atrophy of neurons in Substantia nigra of brain that produces dopamine.
What is the role of Substantia nigra?
Trial-and-error learning and movement control are two critical functions of the brain region known as the substantia nigra (SN). The disorder of movement The loss of DA cells, also known as SN cells that release dopamine, is what leads to Parkinson's disease. A separate kind of cells known as GABA cells is also present in the SN. Animal studies have shown that DA and GABA cells serve various purposes in the SN. Numerous brain illnesses, such as schizophrenia and Parkinson's disease, in which DA cells die, involve SN dysfunction. Thus, comprehending the typical actions of the cells that comprise the SN can aid in our understanding of and eventual treatment for these brain illnesses.Learn more about the Substantia nigra with the help of the given link:
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The amount of atp stored in a muscle cell can keep a muscle active for about ________.
How are the different branches of biology dependent on one another?
All the fields of biology share one trait in that they are employed to investigate various aspects of all naturally occurring living things and offer knowledge about their development, reproduction, structure, and demise.
There are several interconnected fields that makeup biology. Evolution, molecular biology, physiology, cell biology, zoology, microbiology, medicine, botany, genetics, marine biology, and ecology are the several subfields of biology.
Biology is the branch of science concerned with examining living things and their biological processes (Greek words, bios – life, logos – study). All facets of the study of living things are covered, including their occurrence, classification, ecology, economic significance, exterior shape, organization, internal structure, nutrition, health, and other bodily functions, as well as their reproduction, life histories, heredity, and origins. The term biology is sometimes substituted with the terms "life sciences" or "biological sciences" since they are more inclusive and multidisciplinary. The "Father of Biology" is Aristotle. Lamarck is credited with coining the term "biology."
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On chemical analysis, a particular protein was found to contain 438 amino acids. how many peptide bonds are present in this protein?
On chemical analysis, a particular protein was found to contain 438 amino acids. Then the number of peptide bonds present in this protein will be 437.
Proteins are the polymers made up of amino acid as the monomeric unit. These amino acids are joined together by the peptide bond. The proteins serve various functions inside then body like: structural, functional or catalytic.
Peptide bond is formed between two amino acids by the condensation reaction. The carboxylic group of one amino acid binds with the amino group of another amino acid, releasing water ad a by-product. The peptide bonds in a polypeptide is always one less than the total number of amino acids.
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The tactile system is actually made up of two distinct skin senses. please select the best answer from the choices provided t f
The assumption that the tactile system consists of two different skin senses is false.
The tactile sensory systemWe can sense, perceive, organise, and integrate information using the tactile system, which is a component of the nervous system, by using the skin's receptors. The first sense system to form while a child is within the womb is the touch system.What functions do the tactile sensory organs perform?The tactile system is what you can feel with your hands. It's how humans experience the full range of touch sensations, such as pain, temperature, vibrations, and textures. Our bodies have skin-based sensors that communicate with our brains in various ways. We are informed by these indications of what and when we have touched something.learn more about skin senses here
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Answer:
its false
edge2022
True or false: osteocytes and osteoclasts develop from the same type of stem cell.
Osteocytes and osteoclasts develop from the different type of stem cell. Thus, the give statement is False.
What is an Osteocytes?
Osteocyte, a cell that exists in the substance of full fledged bone. It possesses a little chamber called a lacuna, which is contained in the calcified framework of bone. Osteocytes get from osteoblasts, or bone-shaping cells, and are basically osteoblasts encircled by the items they emitted.
Cytoplasmic cycles of the osteocyte expand away from the phone toward different osteocytes in little channels called canaliculi. Through these canaliculi, supplements and side-effects are traded to keep up with the suitability of the osteocyte.
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Why is it so important to maintain a core temperature of 37°C?
A. If your core temperature doesn't stay 37°C, it will actually change and reflect the temperature outside.
B. Your body can only make cells at 37°C, and we need cells because that is what our body is made of.
C. It is just best to keep that temperature so you don't shiver or sweat.
D. The enzymes in our cells work best at this temperature and these enzymes are needed to carry out all the reactions that happen in our body to keep us alive.
Answer: D
Explanation: The body needs to maintain an optimum temperature for the enzymes (around 37 degrees celsius). If it's too hot, our enzymes will denature and will become inactive/lose their function. If it's too cold, the enzymes will too become ineffective (their function will slow down too much).
how do embryological study helps in the evolution
Answer:
Embryology is important to understanding a species' evolution, since some homologous structures can be seen only in embryo development
Janae is digesting her dinner. her muscles are relaxed and her heart is beating rather slowly. janae's _____ nervous system is active.
Janae is digesting her dinner and her muscles are relaxed and her heart is beating rather slowly it should be analyzed that the parasympathetic nervous system is active.
What is the Parasympathetic nervous system?The parasympathetic nervous system may be defined as the web of nerves that significantly relaxes your body after a time period of large stress, depression, or danger. For example, If we have a rest for the digestive function system, the parasympathetic nervous system (PNS) stimulates the production of saliva.
The enzymes in the saliva construct the food to get completely digested. The fundamental function of the parasympathetic nervous system is to reduce the respiration rate of the heart and then be remarkably involved in the process of enhancing digestion.
Thus, when Janae is digesting her dinner, her muscles are relaxed and her heart is beating rather slowly so that the parasympathetic nervous system is active.
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In living organisms, almost all chemical reactions are catalyzed by protein catalysts called:_____.
Nearly all chemical reactions in living things are accelerated by proteins called: Enzymes
Enzymes
The human body is made up of various cell types, tissues, and other intricate organs. The biological processes of breathing, digestion, excretion, and a few other metabolic activities are accelerated by chemicals that our body produces for effective functioning in order to maintain a healthy life. Enzymes are therefore essential to all living things and control all biological activities.
A protein catalyzes a reaction in what way?
Enzymes, however, are another type of catalyst that can be found in nature. Proteins known as enzymes have the ability to reduce the activation energy for a variety of biological events. They accomplish this by attaching the reactant(s), also referred to as the substrate(s), to an enzyme active site.
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During an action potential, the largest increase in sodium permeability occurs at the peak of the action potential waveform.
a. true
b. false
During an action potential, the largest increase in sodium permeability occurs at the peak of the action potential waveform is false.
So, the correct option is (b).
Potassium ions will flow down their concentration gradient, or towards the exterior of the cell, because the membrane is permeable to them. Although the membrane is not permeable to sodium, there is a concentration gradient that favours sodium diffusion in the opposite direction. The action potential is also referred to as a "spike" or a "impulse" by neuroscientists. A depolarizing current causes an explosion of electrical activity known as the action potential.Only recordings with input resistance greater than 5 G were utilised to ensure the correctness of the waveforms captured. Using the pCLAMP6 programme, waveforms were captured and later played back as voltage clamp instructions in other cells.To learn more about waveforms.
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The fact that the base of the basilar membrane responds best to high frequencies supports the ________ theory of hearing.
The fact that the base of the basilar membrane responds best to high frequencies supports the Place theory of hearing.
The place theory of hearing states that the different parts of the basilar membrane respond to sounds of different frequencies.
As mentioned, the base part of the basilar membrane responds best to high frequencies but the tip of the basilar membrane won't respond in the same way. the tip of the basilar membrane will respond best to sounds of low frequency.
It also states that the pitch of a sound is determined by the place of vibration of the membrane.
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Systemic blood pressure is determined by which factor(s)? (select all that apply.)
The factors of systemic blood pressure are,
-Heart rate
-Stroke volume
-Cardiac output
-Systemic vascular resistance
What causes systemic blood pressure?
Constriction of the tiny arteries is typically what raises systemic (or body) blood pressure (arterioles). As a result, the peripheral resistance to blood flow rises, increasing the stress on the heart and elevating arterial pressure. Both the greatest (Systolic) and lowest (Diastolic) points of blood pressure are recorded.
In most cases, systemic hypertension goes unnoticed. The disease is sometimes referred to as the silent killer because of this. You can only detect hypertension if you have your blood pressure monitored.
In the event that hypertension becomes an emergency, defined as a systolic pressure of 180 mm Hg or higher or a diastolic pressure of 120 mm Hg or higher.
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A high school student noticed that the house plants growing near his window were
much taller than the plants growing on the other side of his room. He wondered if
the amount of sunlight the plants were receiving was affecting their growth.
What part of the scientific method does this best represent?
Answer:Photosynthesis
what are the two ways in which plants use the glucose they produce during photosynthesis?
The feeding mode that is most associated with a fermenter (e.g. goat, rabbit, catfish) is?
The feeding mode that is most associated with a fermenter (e.g. goat, rabbit, catfish) is association with symbiotic microbes.
Symbiotic microbes- Symbiotic bacteria are those that coexist in harmony with one another or with other organisms. Rhizobia, for instance, are responsible for nitrogen fixation in the roots of legumes.
Nitrogen Fixation- The soil is home to a large number of heterotrophic bacteria, which fix large amounts of nitrogen without coming into close contact with other living things. Azotobacter, Bacillus, Clostridium, and Klebsiella species are a few examples of this type of nitrogen-fixing bacteria.
The enhanced nitrogen level in the soil benefits both crops used in the intercropping method.
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Why is it important that the inside of a lysosome have a lower ph than the surrounding cytoplasm in the cell?
It important that the inside of a lysosome have a lower ph than the surrounding cytoplasm in the cell
Because the low pH of the lysosome aids in the breakdown of the waste material, it has a lower pH than the cytoplasm.
The lysosome is an organelle that is known as the suicid_e bag of the cell because it bursts when the cell needs to deteriorate, and the acidic pH in the lysosome causes the entire cell to be digested and cause it to break down.
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3. What evidence have you discovered to explain how natural selection
leads to changes in populations of organisms, such as orchid plants?
Some types of the evidence, such as the fossils and the similarities between the related living organisms, were used by Darwin to develop his theory of the natural selection, and are still used by today. Others, such as the DNA testing, were they not available in Darwin's time, but are used by the scientists today to learn more about the evolution.
The Natural selection is the mechanism of the evolution. Organisms that are more adapted to their environment and are more likely to survive and they pass on the genes that was aided their success. This process was causes species to change and then diverge over time. Darwin used multiple lines of the evidence to support his theory of the evolution by the natural selection -- fossil evidence, the biogeographical evidence, and the anatomical evidence.
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