Answer:
true
Explanation:
Before a cell divides, its DNA is replicated (duplicated.)
Answer:TRUE
Explanation:
the hepatic portal vein collects blood from the vessels that drain all of the following organs except
The hepatic portal vein collects blood from the vessels that drain all of the following organs except the liver.
What is hepatic portal vein?Hepatic portal vein is known as the vein that delivers blood to the liver from the following organs:
gastrointestinal tract, gallbladder, pancreas and spleen.The hepatic portal vein is known as the only vein in the body that carries nutrient rich blood from the digestive tract and that doesn't drain into the heart but straight to the liver.
Therefore, the hepatic portal vein doesn't drain blood from the liver but delivers blood to the liver.
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Which statement best illustrates how an organism maintains homeostasis?
Some species of bamboo plant can grow up to a meter in a single day.
Groundhogs hibernate during the winter to conserve energy when food is scarce.
Female squirrels engage potential mates in a chasing competition.
Blue whales reproduce every 2 to 3 years and give birth to one calf.
The statement that best illustrates how an organism maintains homeostasis is as follows: groundhogs hibernate during the winter to conserve energy when food is scarce (option B).
What is homeostasis?Homeostasis is ability of a living organism to adjust its internal environment to maintain a state of dynamic constancy.
Homeostasis is a pivotal process that determines the adaptation and survival of an organism in an environment.
Hibernation is a specific type of homeostatic behavior that involves the state of inactivity and metabolic depression in animals during winter.
Therefore, it can be said that the statement that best illustrates how an organism maintains homeostasis is as follows: groundhogs hibernate during the winter to conserve energy when food is scarce.
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3.
A
C
What effect does fertilizer have on plant growth? Identify the correct step from the choices
below.
ask a question
collect the data
B
draw conclusions
state the hypothesis
If the amount of fertilizer applied to plants is increased, then plant growth will increase.
Since out here the independent variable is the variable that's being controlled or changed on reason by the experimenter, It can moreover be thought of as the cause is the fertilizer and the dependent variable is which is the one dependent on the independent variable is the growth of the plant. Here the hypothesis for an observable phenomenon is a proposed explanation or a theory to be utilized in science, one must be able to test it within the frame of a test. A logical examination is planned to test this hypothesis. Here the Hypothesis is that If the amount of fertilizer applied to plants is increased, then plant growth will increase.
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When there is a negative charge inside an axon and a positive charge outside of it, the neuron is.
The sodium pumps keep sodium out and potassium in while the sodium gates and potassium gates are completely closed when an axon is at rest, giving it a negative charge. This passive condition is referred to as a resting potential because of the positive-negative contrast between the interior and the outside.
The characteristic resting potential voltage of each axon is a negative value compared to the outside in all instances.In a neuron that is at rest, the interior of the cell is roughly 70 millivolts more negatively charged than the exterior (70 mV; note that this value varies depending on the species and type of neuron).Action potential refers to this positive charge located inside the cell. An action potential cycle lasts between one and two milliseconds. Once again more permeable to K+ ions, the membrane eventually becomes positively charged inside the axon. It repolarizes the membrane.Because the inside of the neuron is negative compared to the outside and there are much more sodium ions on the inside, sodium ions rush within the cell. The neuron gets more positive and depolarized because, as you may recall, sodium contains a positive charge.Learn more about axon here:
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bundles of myelinated axons form nervous system tissue called (click to select) . unmyelinated axons, dendrites, neuronal cell bodies, and synapses are found within nervous system tissue called (click to select) .
The White matter of the neurological system is made up of groups of myelinated axons. Grey matter, a component of the nervous system, contains unmyelinated axons, dendrites, neuronal cell bodies, and synapses.
What purposes does the brain's white and gray matter serve?The central nervous system of the brain is made up of two different types of tissue: grey matter and white matter (CNS). The axon terminals, dendrites, and cell bodies found in the grey matter are where all synapses are situated. The white matter, which consists of axons, connects the different parts of the grey matter. Grey matter is largely used to receive information and regulate outgoing information since it contains the cell bodies of neurons. White matter, which is mostly made up of axons, is used to transmit signals from the brain, spinal cord, and body.Learn more about the brain with the help of the given link:
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18. lactation is regulated mainly by two protein hormones; what are they and what is the effect of each one?
The two protein hormones are prolactin hormone and oxytocin hormone.
Alveoli is mainly responsible for producing the milk after the birth of child is active mainly because of the prolactin hormone. The prolactin hormone is once exposed to to cortisol hormone. Once the nipples are stimulated, the oxytocin hormone is released, causing the alveoli to contract.
Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect many different processes, including: Growth and development.
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a drop of sara’s blood was mixed with anti-a serum. another drop was mixed with anti-b serum. and a third drop was mixed with anti-rh serum. clumping was not seen in any of the tests. what does this indicate? select all that apply.
The blood group from the observation is O negative.
The blood groups can be determined practically with the help of anti-serums.
One of the groups into which people or their blood can be classified based on the presence or absence of particular antigens in the blood (such as those labelled A, B, AB, or O) is called as blood group.
There are 4 main blood groups (types of blood) – A, B, AB and O.
Red blood cells, white blood cells, and platelets are contained in a fluid called plasma, which is the blood. Antibodies and antigens found in the blood help identify your blood group.
Plasma contains proteins called antibodies. They are a component of your body's built-in defenses. They identify alien objects, like bacteria, and notify your immune system, which then eliminates them.
Protein molecules called antigens can be detected on the outer layer of red blood cells.
The ABO system distinguishes 4 major blood types:
Red blood cells with blood group A antigens have anti-B antibodies in their plasma.B antigens and anti-A antibodies are present in the plasma in blood group B.Blood group O - has both anti-A and anti-B antibodies in the plasma but no antigens.A and B antigens are present in blood group AB, however there are no antibodies.So, as the question tells that Sara's blood doesn't coagulate with anti serum a, b and rh this means that her RBCs have none of the proteins on its surface leading to Blood group O negative.
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Many soil-dwelling bacteria produce molecules that can be naturally synthesized and kill other species of bacteria. What are these bacteria-killing molecules called?.
These bacteria-killing molecules called antibiotics.
What are antibiotics, and what different kinds are there?Tetracyclines and chloramphenicol are examples of broad-spectrum antibiotics that have an impact on both gram-positive and certain gram-negative bacteria. An antibiotic with an extended-spectrum affects new bacterial species, often gram-negative ones, as a result of chemical alteration.What are some uses for antibiotics?Some types of bacterial infections are treated or prevented with the help of antibiotics. They are useless against viral diseases like the flu or the common cold. Only minor health issues, like acne, that are unlikely to get better without antibiotics should be treated with prescription antibiotics.
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The division of human cells consists of a series of events, collectively called ________, or nuclear division, and ________, or division of the cytoplasm.
Correct answers are karyokinesis and cytokinesis.
The phase of cell division known as karyokinesis is when the nucleus splits into two daughter nuclei. Cytokinesis generally follows it. The DNA condenses during this phase, and the chromosomal material splits in half equally.Because the nucleus undergoes a series of unbroken modifications before dividing into two daughter nuclei, karyokinesis is also known as direct nuclear division. Karyokinesis is a continuous process, however, for convenience, it has been broken down into four stages. Cytokinesis, a type of physical cell division, divides the cytoplasm of a parental cell into two daughter cells. It happens simultaneously with the two nuclear division processes known as meiosis and mitosis that take place in animal cells.By now, its significance should be clear as cytokinesis is the last stage of cell division in plant and animal cells. Without this critical step—and its perfect execution—organisms wouldn't be able to expand in size and complexity. The ability to divide cells and engage in cytokinesis are essential to life as we know it.Learn more about cell division here:
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systemic inflammatory and autoimmune manifestations associated with myelodysplastic syndromes and chronic myelomonocytic leukaemia:
In a French multicenter retrospective analysis, we discuss systemic inflammatory and autoimmune diseases (SIADs) that are linked to myelodysplastic syndrome (MDS), their therapies and prognoses, and the effect of SIADs on overall survival Methods.
Myelodysplastic syndromes and chronic myelomonocytic leukemia In this study, 123 patients with MDS and SIADs have been analysed. Results.Mean age was 70 years and the male:female proportion was 2. The SIADs were systemic inflammation in 39 (32%) cases, CTD in 31 (25%) cases, inflammation arthritis in 28 (23%) cases, a neutrophilic disease in 12 (10%) cases and unidentified in 13 cases (11%).In 75 (66%) cases, the SIADs met the standard classification criteria, while the criteria were not fully met in 21 (19%) cases. Chronic myelomonocytic leukemia (CMML) and systemic vasculitis were significantly associated (P = 0.0024).118 (96%) SIAD patients were dealt with (91% with steroids), with a 83% reaction to first-line treatment, including 80% for steroids alone. A second-line treatment for SIADs was expected for steroid reliance or backslide in 48% of cases.Contrasted and 665 MDS/CMML patients without SIADs, MDS/CMML patients with SIADs were more youthful (P \textless 0.01), male (P = 0.03), less frequently had obstinate iron deficiency with ring sideroblasts (P \textless 0.01), all the more frequently had an unfortunate karyotype (16% versus 11%, P = 0.04) and less oftentimes had a place with low and halfway 1 Global Prognostic Scoring Framework classes, yet no endurance distinction was seen between patients with MDS-related SIADs and without SIADs (P = 0.5).learn more about leukaemia here
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Is legal abortion bad for society? Can this question be answered by scientific research or not?
Answer: I feel in my option it isn't bad. If you're a woman, I feel the government shouldn't have control over your body. What if I girl was forced to do (yk) and had the baby. They didn't want the baby and especially kids, kids shouldn't have to have kids!
Explanation:
A researcher wants to study what happens when the temporal lobe of the brain is damaged. It is not ethical for the researcher to permanently damage the temporal lobes of all her participants and see what deficits might result. How might a case study be a useful way to study this research question?.
The use of a case study in this case is regarded as sufficient to answer the research question.
What is a case study?
The term case study refers to the use of a particular instance or a few instances isolated cases to draw conclusions about the generality of an issue. When it is true that studies that involve case studies are not always generalizable, but that could be the only option that is available.
Since it s not possible for the research to permanently damage the temporal lobes of different people in a bid to obtain empirical data. The use of a case study in this case is regarded as sufficient to answer the research question.
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reconstruction of motor control circuits in adult drosophila using automated transmission electron microscopy
Reconstruction of motor control circuits in adult drosophila using automated transmission electron microscopy
Numerous animals navigate and interact with their surroundings by moving their limbs in unison.
We mapped synaptic connections throughout a neural network that regulates limb motions using serial-section electron microscopy (EM) in order to understand the circuit principles underlying locomotor behavior. We offer a dataset of the ventral nerve cord (VNC) of an adult female Drosophila melanogaster with synapse resolution.
We created GridTape, a method that combines automated serial-section collection with automated high-throughput transmission EM, to produce this dataset.
We rebuilt 507 motor neurons using this dataset, including all of the ones in charge of the legs and wings. We demonstrate a new feedback system for quick limb control in which a certain class of leg sensory neurons directly synapses onto the largest-caliber motor neuron axons on both sides of the body.
To enable the matching of cells between EM and light microscopy data, we make the dataset and reconstructions available to the public.
To help the scientific community acquire large-scale EM data more easily and affordably, we also offer GridTape instrumentation designs and software.
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How do Producers affect the
Environment?
Answer:
producers in an ecosystem provide food and nourishment for other species.
Explanation:
The primary energy is created by a producer.
a typical human cell is approximately 12.00 μm in diameter and enclosed by a membrane that is 5.000 nm thick. what is the volume of the cell including the membrane? to simplify the calculations, model the cell as a sphere.
Volume of cell including the membrane = 9.07* 10^11 nm³
Given data:
Diameter of human cell = 12.00 μm = 12,000 nm i.e. radius = 6000 nm
thickness of membrane enclosing the human cell = 5.00 nm
Total diameter of cell including membrane = 12,000+ (52) = 12010 nm
Solution:
Volume of cell (sphere) = 4/3πr^3
where: r = 12010 / 2 = 6005 nm
4/3 * π * (6005)^3 = 9.07 * 10¹¹ nm³
Hence, volume of cell aolng with membrane is 9.07 * 10¹¹ nm³
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The process of natural changes that take place during An organisms life is called
The process of natural changes that take place during an organisms life is called development
An organisms life can be divided into different phases which have its own important characteristics.
The first phase is called the vegetative or juvenile phase in which the development of the organism takes place but there is not reproductive growth.
The second phase is the reproductive or mature phase in which the organism is able to undergo reproduction and produce offsprings.
The third phase is the senescence or old age which is the last age when the growth slows down and eventually the organism dies.
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Why do lunar and solar eclipses not happen every month?
HURRY
Lunar and solar eclipses does not happen every month simply because the orbit of the earth around the sun is completely different from the orbit of the moon around the Earth.
What is meant by lunar and solar eclipses?The solar eclipse also known as the eclipse of the sun is a phenomenal whereby the moon is in-between the earth and the sun.
The lunar eclipse on the other hand occur when Earth itself blocks the sun's body, thereby; casting a shadow over the surface of the moon.
So therefore, lunar and solar eclipses does not happen every month simply because the orbit of the earth around the sun is completely different from the orbit of the moon around the Earth.
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Ocean to cloud 2 transitions
Answer:
Water cycle
Explanation:
The name used to describe the constant recycling of the earth's water. During the cycle, water given off by plants, water in rivers, streams, puddles, lakes, and oceans, and surface water evaporates, making water vapor. This vapor rises, forms clouds, and then falls as rain, hail, or snow.
me ulagram represents the movement of sugar molecules across a plasma
membrane.
(outside the cell)
or sugar
Plasma
membrane
(inside the cell)
Which of the following arguments BEST explains the movement of the sugar
molecules?
O
The sugar molecules moved across the membrane through active transport due
to the higher concentration of molecules on the outside of the cell and a lesser
concentration of molecules inside the cell.
The sugar molecules moved across the membrane through osmosis due to the
higher concentration of water molecules outside the cell and the lesser
concentration of water molecules inside the cell.
The sugar molecules moved across the membrane through facilitated diffusion
due to the higher concentration of molecules outside of the cell and the lesser
concentration of molecules inside the cell
The sugar molecules moved across the membrane through diffusion due to the
higher concentration of molecules inside the cell and a lesser concentration of
molecules outside of the cell.
The sugar molecules moved across the membrane through osmosis due to the higher concentration of water molecules outside the cell and the lesser concentration of water molecules inside the cell.
What is osmosis?Osmosis is the process by which water molecules pass through a cell's partially permeable membrane from a solution with a high concentration of water molecules to one with a lower concentration. The best way to describe osmosis is as the transfer of water from a region of high water concentration to a region of low water concentration through a semipermeable membrane.
What is osmosis function?Osmosis is the process by which water passes through a semipermeable membrane from an area of LOW solute concentration (low osmolarity) to an area of HIGH solute concentration (high osmolarity). One of the most crucial processes for plants and animals to reach homeostasis is osmosis.
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many organisms that undergo chemosynthesis use instead of to fuel the processes that convert carbon dioxide into sugars.
Answer:
Many organisms that undergo chemosynthesis use hydrogen sulphide (H2S) instead of sunlight to fuel the processes that convert carbon dioxide into sugars.
Explanation:
Prokaryotic microorganisms, principally bacteria and archaea (referred to as “bacteria” in the following), carry out chemosynthetic reactions. Energy is produced in chemosynthetic reactions from oxidizing reduced compounds.
Chemosynthesis is the conversion of carbon (usually carbon dioxide or methane) into organic matter using inorganic molecules (hydrogen or hydrogen sulphide) or methane as an energy source. Most energy is initially derived from sunlight via plant photosynthesis. Example, bacteria and methanogenic archaea living in deep sea vents
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in e. coli, the adenine in the sequence gatc is methylated by the dam enzyme. in the same cells a restriction endonuclease recognizes and cleaves dsdna with gatc on either strand. why does e. coli have these two enzymes?
E. coli has the enzymes Dam methylase and restriction endonuclease for their protection. These enzymes identify the invader genomes as they do not have methylated genome and hence endonuclease cleaves it.
Dam methylase enzyme functions to methylate the adenine in GATC sequence. This methylation serves various purposes like: regulation of gene expression, during mismatch repair, and during replication.
Restriction endonuclease is the enzyme that cuts the DNA strands at specific locations towards the inside of the DNA. All the prokaryotic organisms contain this enzyme. The primary function of this enzyme is to protect from foreign invaders. The enzyme is also highly used in laboratories.
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Which of the following is NOT made up of matter?
a. Gases
b.Heat
c. Living Things
d. Clouds
Feature of Life. Frog. Fast-moving stream
made of cells? Yes. Yes, because All animals
are made of cells
uses energy? Yes. Yes in order to stay alive
you need food which
gives you energy
responds and adjusts. Yes. Yes, in the winter frogs go to change?…… Into hibernation which
freezes their body?
reproduces? Yes. Yes, in order for the species to not go extinct.
grows and develops? Yes. Yes it goes for a tadpole to a frog
Is this correct or wrong
The smallest unit of life, a cell, is regarded as being the most fundamental unit of life. All living things are composed of cells, which can number from one (unicellular) to many trillions.
Cell biology is the study of cells, including their physiology, structure, and life cycle.
Frogs can be found in a variety of habitats, including deserts, cold tundras, and tropical rainforests.The majority of frogs live in aquatic and swampy areas because their skin needs fresh water.Frogs hibernate when the temperature drops below zero.This helps them endure the colder months when food is limited and fluctuations in the outside temperature cause their core temperature to drop.Some species, such as tree frogs, will hibernate in even warmer temperatures.The pattern of tadpole metamorphosis includes gradual forelimb and hindlimb development, resorption of the tail, intestinal shortening, gill removal, and lung formation. After metamorphosing, the tadpole emerges onto land as a baby froglet or toadlet.
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result of arthrodesis of the hallux metatarsophalangeal joint using bone graft for restoration of length
Numerous publications have reported successful outcomes of initial metatarsophalangeal joint bone block arthrodesis following a failed arthroplasty. After restoring an MTPJ arthrodesis with a bone graft, Myerson et al. found an increase of 40 points in pre and post-operative AOFAS scores (39 to 79).
Indications included unsuccessful arthrodesis surgeries with shortening of the first ray, Keller's procedures, several additional first metatarsal osteotomies, and failed hallux valgus surgery. Tricortical iliac crest grafts were placed in bone deficiencies with a mean length of 10.7 (range, 8-15) mm in all patients. Either numerous wires or a low-profile plate was used to achieve fixation. The average lengthening was 4.4 (from 0 to 8) mm. At the most recent checkup, two of the three feet had connected. Three feet continued to require more revision surgery. Every patient had their stabilizing Kirschner wire removed. Using the Foot and Ankle Disability Index, the median patient-reported outcome score was 84.6. (range, 37.5-97.1).
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your biological anthropology instructor gives you a hominin skull to analyze. you note the very large cranial capacity and the occipital bun. based on this information, to which group does the skull most likely belong? a. neanderthals and. modern homo sapiens c. early archaic homo sapiens d. homo erectus
You noted that the skull has very large cranial capacity and the occipital bun which means it belongs to the group which is referred to as neanderthals and modern homo sapiens and is denoted as option A.
What is Occipital bun?This refers to the bulge or projection of the occipital bone at the back of the skull and is present as a result of evolutionary changes in humans.
It is believed to be present as a result of the enlargement of the visual cortex and is common in the groups known as neanderthals and modern homo sapiens.
This is therefore the reason why option A was chosen as the most appropriate choice.
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Help if u can please with 10 and 11
Answer:
with number 9 it can depending on the subject since sicence also includes math
Explanation:
which substance absorbs energy quicker light or dark color objects and why?
Answer:
Dark-colored materials both absorb and emit energy more readily than light-colored materials.
How can we trace the transformation of energy through living and non living systems
Answer:
Food chain/web/pyramid
Explanation:
graphs the transformation on energy n stuff
The main form of food production in ____ is the daily collection of wild plants and the hunting of wild animals. a. hunting and gathering societies c. agricultural societies b. pastoral societies d. horticultural societies please select the best answer from the choices provided a b c d
The main form of food production in hunting and gathering societies is the daily collection of wild plants and the hunting of wild animals.
In areas where there are not many industries, people usually bother about ways by which they can get food and basic necessities to survive. Among these people, comes the hunting and gathering societies.
The hunting and gathering socieities are small societies where people collect wild plants and hunt wild animals as a food source. These people are not localized and hence do not have permanent homes. As they have to travel to different places in the search of food, such people do not make a home or village. They just move together from place to place collecting plants and hunting animals for feeding themselves.
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_______is the collection, analysis,
modeling, and distribution of
information gathered from large
quantities of biological data, as in
genetic research.
Bioinformatics is the collection, analysis, modeling, and distribution of information gathered from large quantities of biological data, as in genetic research.
In particular when the data sets are big and complicated, it is an interdisciplinary field that creates techniques and software tools for comprehending biological data. To analyze and interpret the biological data, the interdisciplinary discipline of research known as bioinformatics brings together biology, chemistry, physics, computer science, information engineering, mathematics, and statistics. Biological inquiries have been analyzed in silico utilizing computational and statistical methods and bioinformatics.Both biological investigations that incorporate computer programming into their technique and specialized analysis "pipelines," particularly in the field of genomics, are included in bioinformatics. Single nucleotide polymorphisms and candidate gene identification are frequent applications of bioinformatics (SNPs).Therefore, bioinformatics is the correct answer.
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