Bone marrow is found in the hollow spaces of spongy bone, which is located in the epiphysis of long bones.
Bone marrow can be found in the many hollow spaces of the spongy type of bone. The spongy bone, primarily located in the epiphysis of long bones, consists of tiny plates called trabeculae that add strength to the bone. Within the spaces of these trabeculae lies the red marrow, which is essential for the production of red blood cells, with a fascinating production rate of 2 - 3 million per second, and also produces various types of white blood cells.
Organisms maintain dynamic homeostasis through behavioral and physiological mechanisms. Which of the following statements is an accurate explanation of a negative feedback mechanism used by animals to regulate body temperature?A) Squirrels are able to cool themselves during warmer months by producing more brown fat, which contains abundant mitochondria and a rich blood supply. B) Desert jackrabbits have unusually large ears that serve as solar heat collectors to enable them to maintain their body temperatures. C) A ground squirrel's hypothalamus detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production. D) A goldfish slows its movements when the water temperature is lower.
Answer:
Organisms maintain dynamic homeostasis through behavioral and physiological mechanisms. Which of the following statements is an accurate explanation of a negative feedback mechanism used by animals to regulate body temperature? C) A ground squirrel's hypothalamus detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production
Explanation:
The temperature-regulating center of vertebrate animals is located in the hypothalamus. A ground squirrel's in there detects changes in environmental temperatures and responds by activating or suppressing metabolic heat production. Maintenance of homeostasis usually involves negative feedback loops.
Which process occurs during the growth and development of a fertilized human egg
Answer:
cell division
Explanation:
The main function of the inflammatory response is 1.to initiate the production of antibodies. 2.remove contaminating microorganisms 3.initiate repair of damaged tissues. 4.initiate T-cell-mediated immune responses.
Answer:
3.initiate repair of damaged tissues.
Explanation:
Inflammation is a process or response that occurs when the immune cells produce substances in order to protect the body from injuries infection by foreign microbes like viruses and bacteria. The main functions of inflammation or inflammatory response are to remove the cause of injuries in cell, get rid of damaged tissues and necrotic cells that might have been damaged during injury and initiate the repair of damaged tissues.
During inflammatory response certain symptoms like redness, heat/warmth, swelling and pain are most likely to be experienced.
Without crossing over:
A. cells could not complete meiosis.
B. meiosis could not produce haploid gametes.
C. only a small number of unique gametes could be produced by a single individual.
D. genetic recombination could not occur.
Answer:
D. Genetic recombination would not occur.
Explanation:
If this did not occur, all individuals would be identical to its parent unless a mutation occurred.
Crossing over is necessary for genetic recombination in meiosis, increasing genetic diversity in gametes.
Explanation:The correct answer is D. Without crossing over, genetic recombination could not occur in meiosis. Crossing over is the exchange of genetic material between homologous chromosomes during prophase I of meiosis. This process creates new combinations of alleles and increases genetic variation.
By crossing over, chromosomes exchange genetic information, which leads to the formation of genetically diverse gametes. This ensures the production of haploid gametes with unique combinations of genes, increasing genetic diversity in the offspring.
If crossing over did not occur, meiosis would produce gametes with the same genetic information as the parent cell. This would limit genetic diversity and reduce the ability to adapt to changing environments.
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The Lytic Cycle can be described as the following. Check all that apply
Viral DNA takes over Symptoms are present
Viral DNA merges (mixes) with the host cell DNA
Virus destroys host cell *burst*
Hijacking of the host cell occurs
No symptoms are present (asymptomatic)
Cell reproduces and spreads the provirus
The Lytic Cycle can be described as the following:
Virus destroys host cell *burst*
Hijacking of the host cell occurs
Cell reproduces and spreads the provirus
Viral DNA takes over Symptoms are present
Explanation:
Lytic cycle is the cell cycle of virus or bacteriophage which after replication bursts open the cell and gets the virion released.
The virus gets attached to the surface of the cell wall and gets penetrated inside the cell.
Once it reaches the cell it makes it way to the nucleus where it hijacks the hosts machinery of replication and gets uncontrollable divisions.
The genes of the virus get expressed from the genetic material of the virus.
The assembly of the virion particle takes place.
After the assembly the cell lyses to release the virus.
The two gases that the blood carries around the body are and. .
Answer:
Oxygen and carbon dioxide
Explanation:
Once the respiratory gases have diffused in the lungs, resulting in the blood becoming O2 rich and CO2 being exhaled, the next stage of transporting the O2 rich blood to the tissues that need it takes place.
At the same time the next batch of CO2 rich blood must be brought to the lungs for the process to take place again.
Final answer:
The two gases that the blood carries around the body are oxygen, essential for cellular energy production, and carbon dioxide, a metabolic waste product.
Explanation:
The two gases that the blood carries around the body are oxygen and carbon dioxide. Oxygen is vital for cellular respiration, a process in which cells produce energy. The blood, specifically red blood cells containing hemoglobin, transports oxygen from the lungs to various tissues across the body. Hemoglobin has a high affinity for oxygen and, thus, is extremely effective at oxygen transport. On the other side, carbon dioxide is a waste product of metabolism and is carried back to the lungs to be exhaled. These gases exchange primarily in the capillaries surrounding the alveoli in the lungs.
The ________ nervous system controls the skeletal muscles.
Answer:
somatic nervous system
Explanation:
The somatic nervous system (SNS or voluntary nervous system) is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles. The somatic nervous system consists of afferent nerves or sensory nerves, and efferent nerves or motor nerves.
brainliest pls
Answer:
Somatic nervous system
Explanation:
who was the first scientist to discover the white blood cell
Hi there! Hopefully this helps!
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Answer: Gabriel Andral, a French professor, and William Addison, an English doctor both informed the first classifications of white blood cells.
What Makes Water So Special? Why? When you hear that NASA's space probes are looking for "evidence of life" on other planets, do you know what that means? They are looking for evidence of liquid water. Water is fundamental for all life; without it every living thing would die. Water covers about 70% of Earth's surface and it makes up 65-75% of our bodies (82% of our blood is water). Even if water might seem boring to you-no color, taste, or smell-it has amazing properties that make it necessary for supporting life.
1) How many hydrogen atoms are in a molecule of water?
2) How many oxygen atoms are in a molecule of water?
3) What holds the hydrogen atoms to the oxygen atom?
4)The shading around the molecule represents the relative density of electrons shared by the atoms. What does this indicate about the density of electrons around the oxygen atom as compared to the density of electrons around the hydrogen atoms?
5) Where is the majority of negative charge on the water molecule?
Water (H2O) consists of 2 hydrogen atoms and 1 oxygen atom held together by covalent bonds. The density of electrons around the oxygen atom is higher compared to the hydrogen atoms, and the majority of negative charge is near the oxygen atom.
Explanation:1) A molecule of water (H2O) consists of 2 hydrogen atoms and 1 oxygen atom.
2) A molecule of water (H2O) consists of 2 hydrogen atoms and 1 oxygen atom.
3) The hydrogen atoms are held to the oxygen atom through covalent bonds, where electrons are shared between the atoms.
4) The shading around the water molecule indicates that the density of electrons around the oxygen atom is higher compared to the density of electrons around the hydrogen atoms.
5) The majority of negative charge on the water molecule is located near the oxygen atom.
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The most important force causing net outward water flow across capillary walls is ________. Question 19 options: 1) osmotic pressure of plasma proteins 2) hydrostatic pressure of capillary blood 3) hydrostatic pressure of interstitial fluid 4) intracellular hydrostatic pressure
Answer:
2) hydrostatic pressure of capillary blood
Explanation:
Hydrostatic pressure is the type of pressure exerted by any fluid in a confined space.
This force of hydrostatic pressure simply means that when blood moves along the capillary, fluid which contain nutrients and other basic substances are usually moved out through its pores and into the interstitial space.
A microRNA is a _______ that binds an mRNA from a different gene to ___________. Group of answer choices double-strand of RNA; prevent its translation double-strand of RNA; prevent its transcription double-strand of RNA; activate its transcription single-strand of RNA; prevent its transcription single-strand of RNA; prevent its translation
Answer:A microRNA is a single strand of RNA that binds an mRNA from a different group to prevent its translation.
Explanation:
MicroRNA are a class of 22 nucleotide, non-coding RNAs that are evolutionarily conserved from plants to animals and negatively regulate gene targets by inhibiting protein translation or enhancing mRNA degradation. MiRNA are transcriped by RNA polymerase II as large RNA as large RNA precursors called PRI-miRNA.
Answer:
The correct answer is "double-strand of RNA; prevent its translation".
Explanation:
A microRNA is a small non-coding RNA molecule that is double stranded of approximately 22 to 33 nucleotides in length. The function of microRNA is to regulate gene expression by silencing complementary mRNA, which causes their silencing. Once the microRNA binds to an mRNA, the mRNA is silenced and do not proceed to be translated into a protein.
Which feature on microscope did Anton van Leeuwenhoek add that enabled him to magnify organisms about 250 times?
•drop of water
•light from oil lamp
•tubes that extend
•polished lenses
Answer:
D
Explanation:
Answer:
polished lenses
I got it right :D
Which feature on microscope did Anton van Leeuwenhoek add that enabled him to magnify organisms about 250 times?
•drop of water
•light from oil lamp
•tubes that extend
•polished lenses
Answer:
polished lenses
Explanation:
i am doing a assignment on them right now
Answer:D. Polished Lenses
Explanation:
i got it right
what part of dna varies among dna molecules
Answer:
The part of the DNA molecule that varies among DNA molecules is nitrogenous bases.
Organisms with true radial symmetry A. tend to be highly mobile. B. do not have a distinct head region and tend to be sedentary or passive drifters. C. can be divided into two matching halves along only one plane. D. have their sense organs, mouth, and brain clustered in the head.
Answer:
Option-A
Explanation:
Radial symmetry refers to the symmetry in which the organism can be cut into the same half through any plane which can be observed in the organisms belonging to Cnidarians.
The organism with radial symmetry do not show a distinct head region and are considered to be passive drifters like observed in the corals, sea anemones, starfish.
Thus, Option-A is correct.
Liposomes consist of ________ bilayers that enclose an aqueous compartment where drugs can be contained for delivery to specific tissues if target proteins are present. Liposomes consist of ________ bilayers that enclose an aqueous compartment where drugs can be contained for delivery to specific tissues if target proteins are present. Membrane protein Cholesterol Phospholipids Detergents
Answer:
Phospholipid bilayer
Explanation:
Liposomes are vesicles are spherical in shape. They consist of at least one phospholipd bilayer most especially phosphatidycholine. Liposomes are artficial vesicles similar to a membrane, because it has an hydrophilic core surrounded by a hydrophobic lipid bilayer.
Liposomes are artificial prepared and are used for the transportation of substances like drugs and nutrients between cell parts, outside of the cell and into the cell.
In liposomal drug delivery, the liposome fuses with other internal cell membranes at the site of action and releases its liposomal content.
Final answer:
Liposomes are composed of phospholipid bilayers and are used for drug delivery, offering versatility in composition and the ability to target specific tissues.
Explanation:
Liposomes consist of phospholipid bilayers that enclose an aqueous compartment where drugs can be contained for delivery to specific tissues if target proteins are present. They can either be unilamellar, with a single bilayer, or multilamellar, resembling an onion with multiple layers. The interior of liposomes is aqueous, allowing for the encapsulation of water-soluble molecules such as nucleic acids, proteins, and drugs.
The chemical composition of liposomes can be varied, with neutral phospholipids commonly used and sometimes supplemented with negatively charged phospholipids. Other molecules such as cholesterol can also be incorporated to modulate properties like membrane fluidity and transition temperature. With their ability to encapsulate therapeutic agents and target specific cells, liposomes are considered valuable in medical applications, often referred to as lipid nanoparticles.
Liposomes are formed when phospholipids are mixed with water, resulting in a layered vesicular structure that can be fine-tuned for drug delivery systems. They are an example of the sophisticated engineering of biological mimetics for use in modern medicine.
The evidence showing that the chimpanzee genetic code is 96% the same as the human genetic code is an example of ________.
A.
comparative morphology
B.
molecular sequencing
C.
homologous proteins
D.
directional selection
The evidence showing that the chimpanzee genetic code is 96% the same as the human genetic code is an example of molecular sequencing. Therefore, option B is correct.
What is molecular sequencing?Molecular sequencing refers to the process of determining the order of nucleotides or base pairs in DNA or RNA molecules. By comparing the genetic sequences of different organisms, scientists can analyze the similarities and differences between their genetic b.
In the case of chimpanzees and humans, molecular sequencing techniques have revealed a high degree of similarity in their genetic codes, with an estimated 96% similarity.
It supports the idea of common ancestry and demonstrates the close evolutionary relationship between chimpanzees and humans. Therefore, option B is correct.
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An important component of the lamina propria in the upper respiratory system is
Answer:
The mucus glands.
Explanation:
Lamina propria is the name of the connective tissue located in the upper respiratory system and the nose which is a part of the mucosa. The most important component of the lamina propria is the mucus glands.
I hope this answer helps.
Answer:
An important component of the lamina propria in the upper respiratory system is mucus glands.
Explanation:
Lamina propria is a part of mucosa conatining loose connective tissue and in the respiratory system, it has folllowing characteristics :
CapillariesMast cells ( Histamine, serotonin, leucotrienes)Plasma cells (IgAs)Macrophages (cytokines)Mucus glands (mostly mixed , occur in deeper layers of lamina propria and within the submucosa)APC ( induce immune reactions)Lymphocytes (regulators and effector cells)In each simulation trial, you changed the number of people and measured the number of _ people in the population.
Therefore, the independent variable was the number of people who were
_ , and the dependent variable was the number of people who were _.
Answer:
immune
infected
immune to the disease
infected by the disease
Answer:
immune
infected
immune to the disease
infected by the disease
the total number of people
the series of people who exchanged liquids with each other
the number of individuals who were initially infected
Explanation:
Soil moisture is the independent variable. True The proportion of individuals is the dependent variable. True Species B and Species C have a similar average tolerance for soil moisture. False Species C tolerates a broader range of soil moisture than species B. True Species C is more likely to live in a desert than Species A. False
Answer:
Explanation:
True: Soil moisture is the independent variable.Independent variables consisted of soil moisture
True:The proportion of individuals is the dependent variable.
True: Species B and Species C have a similar average tolerance for soil moisture.
True: Species C tolerates a broader range of soil moisture than species B. False: Species C is more likely to live in a desert than Species A.
What fossil fuels were formed from buried remains of plants and animals that lived millions of years ago?
Answer:
Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.
Explanation:
The leaves of a plant fold inward when touched as a way to defend themselves from potential harm. What kind of response do the leaves demonstrate?
Answer:
Nactic response
Explanation:
The thigmonasty is a kind of response shown by a plant towards touch and vibration stimuli. It is generally produce in response to changes in plants that occur due to turgor pressure within a cell. The plants generally show this kind of response so as to decrease their surface area so that they can be protected by the grazing herbivores. Also some insectivorous plants like Venus fly trap use it to trap insects when they come in contact of the plant.
On the basis of the above explanation, The leaves of a plant fold inward when touched as a way to defend themselves from potential harm is the example of A. nastic response.
It is called the Nastic response when the leaves of a plant fold inward when touched as a way to defend themselves from potential harm.
What is the nastic response in plants?It is the plant movement that occurs in response to environmental stimuli but unlike tropic movements. Some of the most spectacular plant movements are nastic movements.
Plants that show nastic response- Mimosa pudica plant
- Dandelion flower
- Touch-me-not
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As the sun shines on Earth, plants use its energy to complete the process of photosynthesis. Energy is transformed during the process into chemical energy in the form of sugars, such as carbohydrates. However, the energy available for top consumers is much less than that produced by autotrophs. Why is this so?
Answer:
Most of the energy is used up in metabolism
Explanation:
Which of the statements about the process of excretion in complex multicellular animals is true?
A. Water and all other molecules are actively transported back into the bloodstream during reabsorption.
B. Selective filtration of the blood occurs as blood pressure forces materials into an extracellular space.
C. During the process of reabsorption, additional toxic compounds and excess ions that were not filtered from the blood initially are removed from the organism.
D. Reabsorption helps to send toxic compounds to the liver so they can be detoxified and turned into usable compounds by the body.
The true statement about excretion in complex multicellular animals is that selective filtration of the blood occurs as blood pressure forces materials into an extracellular space. This occurs in the kidneys where small molecules like water, ions, and urea are filtered out while larger molecules and cells are retained.
Explanation:The process of excretion in complex multicellular animals, such as humans, involves several steps including filtration, reabsorption, secretion, and excretion. The correct statement about this process is option B: Selective filtration of the blood occurs as blood pressure forces materials into an extracellular space. This is the basic mechanism by which the kidneys filter blood, primarily based on blood pressure and capillarity. It is at the glomerulus, a network of tiny blood vessels in the kidneys, that the filtration process occurs. Large molecules and cells are retained in the blood while smaller molecules such as water, ions, and urea are forced into Bowman's capsule and form the glomerular filtrate. Other options mentioned are not entirely accurate in the context of excretion process in complex multicellular organisms.
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What property of the elements determines the charge the
element's ions will have?
Answer:
The answer is below with my explanation. ((:
Explanation:
The chemical properties of an element are determined by the configuration of its electrons in orbit around its nucleus. The number of electrons in orbit is equal to the number of protons in the nucleus (each proton has an an electrical charge of plus one, while each electron has the same charge only negative one).
I hope this helps :))
Answer:
Metals lose electrons to form positively charged ions and nonmetallic elements gain electrons to form negatively charged ions.
What is homosexuality
Answer:
attraction to the same gender
Explanation:
boys being attracted to boys and girls being attracted to girls
Mrs. Rodriguez shows her seventh-grade class a video on cellular division
of a germ cell dividing by meiosis and a human zygote dividing by mitosis.
Which of the following might be included in this video as the best
description of the difference in the results of mitosis and meiosis?
Answer:
Mitosis results in daughter cells with a complete set of genes. Meiosis results in daughter cells with half genes.\
(I did the work in my class alr so i know)
A germ cell dividing by meiosis and a human zygote dividing by mitosis, and the main differences are that by the process of mitosis, the human zygote grows in size with the exact same kind of cell, but in meiosis, four haploid gametes are formed.
What is the importance of mitosis in the zygote's development?The meiosis results in four haploid cells, and those are called gametes cells, such as the sperm and ovum from the male and female, respectively. The gametes unite to form the zygote, and then the zygote divides mitotically, resulting in an equal set of chromosome cells, and the cells multiply to form a ball like the morula. The morula then divides further and undergoes modification to form the baby.
Hence, the main differences are that, by the process of mitosis, the human zygote grows in size with the exact same kind of cell, but in meiosis, four haploid gametes are formed.
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A young animal with no offspring of her own is more likely to put herself at risk and give an alarm call when predators approach her group when she has more close relatives in the group in danger. This is an example of:_______.
A. Kin selection.
B. Inclusive Fitness.
C. Intra-sexual selection.
D. Altruism.
Answer: b. Inclusive Fitness
Explanation:
Inclusive fitness is the number of equivalents of offspring that an organism rears, rescues, or otherwise supports through it's actions.
Inclusive fitness is a theory which suggests that an organism's genetic success depends on cooperation with other people in a population. For future generations, a gene would be more prevalent if all individuals possessing the gene succeed for reproducing it, rather than only one person having the gene.
Hence the correct option is b. Inclusive Fitness
The DNA sequence ATCAGCGCTGGC is part of a gene. how many amino
acids are coded for by this message? *
Answer:
4
Explanation:
Each section of three nucleotides (called a triad) codes for one amino acid. Since there
are four triads here, this piece of DNA codes for 4 amino acids
Final answer:
Assuming the provided DNA sequence is in the correct reading frame and does not include a stop codon, it encodes for four amino acids. The actual translation would depend on the mRNA transcribed from DNA, where a start codon must be present, and translation proceeds until a stop codon is reached.
Explanation:
The DNA sequence ATCAGCGCTGGC is composed of four codons: ATC, AGC, GCT, and GGC. Each codon corresponds to a single amino acid in the genetic code. However, without a start codon (AUG in mRNA), we cannot be sure where the translation begins or if it includes a stop codon to terminate the translation. Assuming the sequence provided is in the correct reading frame and does not include a stop codon not visible in the provided sequence, this DNA would code for four amino acids following the transcription and translation processes.
It's important to note that DNA sequences are first transcribed into mRNA, where thymine (T) is replaced with uracil (U), before being translated into amino acids. Furthermore, only mRNA sequences are directly translated into amino acids, where each codon specifies each amino acid. In proteins, the genetic code defines the relationship between nucleotide triplets and their corresponding amino acids. Provided that the given sequence is part of a gene that's properly framed, the processed mRNA would then lead to the assembly of a short polypeptide chain during translation.
What contributes to the movement of air masses
Answer:
the answer is b natural winds
Explanation: