what it means that
spongy bone
consists of
bony spikes?
Answer:
Spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. Instead, the lacunae and osteocytes are found in a lattice-like network of matrix spikes called trabeculae
In which two ways do plant cells use the sugar made in photosynthesis ?
• to produce phosphate groups
• to store inorganic matter
• to supply the plant with energy for life
• to make other types of organic molecules
Answer:
3 and 4
Explanation:
Sugar made from photosynthesis is broken down to release energy needed for life.
and the sugar can also be used to make other organic molecules such as cellulose.
a hypothetical symport facilitates the transfer of cl- and k into the cell. given that the cell membrane potential is -0.055 v (neg charge on inside), the temperature is 300k, and the concentrations of the cl- inside the cell is 10 mm and outside is 100 mm and the concentration of k inside is 110 mm and outside the cell is 4 mm, what is the energy associated with this movement?
Additionally, K+ is a positively charged ion with a concentration of 120 mM inside the cell, 4 mM outside the cell, and an equilibrium potential of -90 mV. This means that K+ will be in electrochemical equilibrium when the cell is 90 mV negative of the extracellular environment.
What happens if the K+ content in extracellular space rises?It is widely known that increased extracellular potassium ion concentrations ([K+]o), which frequently accompany conditions like ischemia and hyperkalemia in the heart, alter the resting transmembrane potential and the excitability of cardiac tissue.
Increased extracellular potassium depolarizes neurons because the resting neuronal membrane is extremely permeable to K+ and the membrane potential is sensitive to variations in the extracellular potassium concentration.
The duration of Purkinje and ventricular action potentials is lengthened when extracellular K concentration is reduced below approximately 3.0 mM, and diastolic depolarization in the Purkinje fiber is enhanced (9,10,12,13).
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A good team member will actively listen, which means they will ______. a. listen while looking at the notes they are taking b. constantly look for new things to listen to c. use body language to understand how a speaker feels d. listen to multiple people all at once please select the best answer from the choices provided a b c d
A good team member will actively listen, which means using body language to understand how the speaker is feeling.
What is Active listening?Active listening is a skill that can be learned with consistent practice. In active listening, a person employs all of his or her senses. The person responds to the speaker through verbal and nonverbal means (such as nodding and maintaining eye contact), encouraging the speaker to continue speaking. Positive feedback in the form of body language makes the speaker feel more at ease, allowing him to speak more comfortably and honestly.
As a result, option C) use body language to understand how a speaker feels is the correct answer.
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Answer:
Use body language to understand how a speaker feels
Edge 2023-2024
Type the correct answer in the box. Spell all words correctly.
What type of succession replaces a small number of species at a time, and thus does not causes a large-scale disturbance in a given community?
_____________ succession replaces a small number of species at a time, and thus does not cause a large-scale disturbance in a given community.
Answer:
Explanation: The opening line, "One dollar and eight-seven cents" (in 1905) is equivalent to how much in today's dollars? Why is this amount both important and unimportant in the story?
Answer: The answer is cyclic
Explanation: just took the test
To which part of the centromere do mitotic spindle fibers attach during prometaphase?.
The kinetochore is the part of the centromere do mitotic spindle fibers attach during prometaphase.
How is the classification of chromosomes based on the location of the centromere?
Based on where the centromere is located, there are four different types of chromosomes.
Chromosomes with a centromere in the middle are referred to as metacentric chromosomes because they are divided into two equal arms.Sub-metacentric chromosome: A sub-metacentric chromosome is one in which the centromere is positioned somewhat outside of the middle region. Here, one arm is just a little bit longer than the other.Acrocentric chromosome: An acrocentric chromosome is one in which the centromere is found close to one of the terminal ends. One arm is incredibly long and the other is incredibly short in thisA chromosome is referred to as telocentric if its centromere is found at one of the terminal ends.What do centromeres do? Describe them in writing.Listed below are the functions of the centromere:
A chromatid is split into two arms by a region known as the centromere. The kinetochore is situated around the location of the duplicated chromosome in order to connect to the spindle fibers' microtubules. It facilitates correct chromosomal segregation.
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he diagram below shows the stages of succession in a forest ecosystem.
A diagram showing 4 stages of succession in a forest ecosystem. Stage A: A mature forest. A fire occurs, resulting in Stage B, a burnt forest where nothing is growing. Stage C, pioneer plant species grow in the bare ground. More species follow and grow bigger. Stage D: A mature forest with several tree species and younger trees.
Which area shows the climax community of secondary succession?
A
B
C
D
Answer:
d
Explanation:
control of gene expression in eukaryotic cells occurs at which level(s)? only the transcriptional level epigenetic and transcriptional levels epigenetic, transcriptional, and translational levels epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels
In eukaryotic cells, gene expression is under the control of Option D epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels.
While genetic alterations can affect which proteins are produced, epigenetic changes impact gene expression and can "turn on" and "turn off" genes. The relationship between your genetic, actions, and environment is simple to understand since your environment and habits, such nutrition and exercise, can cause changes in your epigenome. Epigenetic mechanisms are molecular processes that control how an organism's genome is regulated by its environment. The genetic information is transferred from the archival copy of DNA to short-lived messenger RNA during transcription, translation, and subsequent protein modification, which typically results in the synthesis of protein. Despite the fact that all cells in an organism have fundamentally the same DNA, different cell types and functions result from qualitative and quantitative variations in gene expression as well as control of gene expression.
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Does the temperature increase or decrease with altitude in the stratosphere? What
causes this change in temperature?
Answer:
In this region the temperature increases with height. Heat is produced in the process of the formation of Ozone and this heat is responsible for temperature increases from an average -60°F (-51°C) at tropopause to a maximum of about 5°F (-15°C) at the top of the stratosphere.
Explanation:
Of the 6 carbons in a starting molecule of glucose, at the completion of pyruvate oxidation _____ carbons are fully oxidized to _____, while _____ carbons remain in _____.
Answer:
2 carbons; to CO2; 4 carbons; acetyl groups
Explanation:
What cellular process does a mitochondrion perform for the cell?
A. The synthesis of carbohydrates and lipids
B. The division of nucleic acid in replication
C.
The release of energy for metabolic activity
D. The sorting and packaging of proteins
Answer:
C. The release of energy for metabolic activity
plant cells produce hormones that affect plant growth and behavior. cytokinesis and auxins are two important types of plant hormones. together, these hormones control cell division in the plant.if cytokinesis is high and auxin is low, the plant produces stems. when auxin is high and cytokinin is low,roots grow . plant hormones travel around plant in vessels called xylem. hormones also move from cell to cell in plants by diffusion or active transport. where are hormones produced in animals , and how are they transported throughout the body
Answer:
Hormones get things done. Think of them as chemical messengers that are made in one place in the body and deliver their message in a totally different place in the body. And just like hot sauce, a little goes a long way. Hormones are usually found in very small concentrations, but boy to they pack a punch! We know hormones cause a lot of changes in humans (ah, puberty), but did you know that plants have hormones, too? Plants miss out on all the fun of body hair, acne, and voice changes, but read on to learn about the amazing effects that hormones have on plant growth and development!
Explanation:
oum I hope it helps oum... correct me if I'm wrong
Which statement correctly pairs the organelle with its function?
O The vacuole stores genetic information
O The chloroplast synthesizes proteins from amino acids
The nucleus absorbs the sun's energy for photosynthesis
O The plasma membrane controls the flow of materials into the cell
Answer:
O The plasma membrane controls the flow of materials into the cell
Explanation:
s 24795 limits beta-amyloid-alpha7 nicotinic receptor interaction and reduces alzheimer's disease-like pathologies. biol psychiatry. 2010 mar 15;67(6):522-30.
Alzheimer's disease (AD) plaque and neurofibrillary pathogenesis are made possible by beta-amyloid (Abeta). By interacting with alpha7 nicotinic receptors, soluble Abeta stimulates the formation of intraneuronal Abeta aggregates and the phosphorylation of tau (alpha7nAChRs).
In vitro reincubation with S 24795 decreases the interaction between Abeta(42) and alpha7nAChR as well as beta-amyloid (Abeta) (42)-induced tau phosphorylation. S 24795 lessens Abeta(42)-alpha7nAChR association and Abeta(42) immunostaining in organotypic brain slice cultures and in an in vivo Abeta(42) injection model.
S 24795 also normalizes Ca(2+) fluxes through alpha7nAChR and NMDAR channels in organotypic cortical slices and mice brains that have been exposed to beta-amyloid (Abeta)(42) or infused with it. Galantamine and memantine have a minor impact on the Abeta(42)-alpha7nAChR coupling and Abeta(42)-mediated reduction of alpha7nAChR- and NMDAR-mediated Ca(2+) influx, in contrast to S 24795 and Abeta(12-28).
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What are non- living factors of the environment called?
Answer:
Answer down below!
Explanation:
They are called abiotic factors and these factors are indeed, non-living factors in a given ecosystem. They include things such as light, water, or temperature since they do affect animals living in an ecosystem.
Michaela is baking a dessert. She measures 100 mL of vegetable oil by pouring it from the bottle into a measuring cup. Then she pours the vegetable oil into a bowl with the other ingredients.
Which best describes what happened to the vegetable oil during this process?
The shape of the vegetable oil changed but the volume did not.
What is state of matter?
Solids, liquids, and gases all fall under the category of states of matter. Solids are made up of tightly packed particles. In contrast to gases, where they are scattered, liquids have more particle mobility. Particles in chemistry can be molecules, ions, or even atoms.
It is important to understand that only when matter gains or loses energy will its state change. The vegetable oil is simply poured in this instance from a bottle into a cup, then into a bowl. No energy was gained or lost in the process; the only thing that will change is the oil's shape, as the bowl it is currently in is not the same shape as the bottle.
Hence the correct option is the shape of the vegetable oil changed but the volume did not
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If you mutated the laci gene resulting in a mutant lac repressor protein that could bind to the lac operator but not to allolactose, what would be the consequence for transcription of the lac operon?.
An uninducible phenotype would come from a "down" mutation, which would preclude expression even when the de-repressed condition (when the inducer is present).
What would happen to the lac operon's transcription?The lac repressor is a lactose sensor. When the presence of lactose the repressor's ability to prevent transcription of a operon in its normal state is lost. The repressor protein recognizes galactose by means of its enantiomers allolactose. A glucose sensor is the proteins catabolite activator (CAP).
What exactly are translation and transcription?Transcription and translation are indeed the processes through which DNA is converted into RNA and utilized to make proteins, respectively.
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Name the process by which soluble food enters the blood, diffusion, fermentation or transpiration?
Answer:
It is called absorption. Digested food enters the blood or lymph through the small intestine wall by diffusion or active transport
Answer:
Diffusion
Explanation:
Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. It can occur all over the body including the large intestine when food enters to blood stream and in the alveoli in the lungs where gases diffuse into the blood stream. Hope this helps :)
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19. What is the purpose of taxonomic systems?
a. To provide descriptive latin names
b. To maintain a small number of taxa
c. To construct a family tree that predicts how many species may be discovered into the future
d. To provide consistent ways to identify and classify organisms as they are being studied
Answer: d. To provide consistent ways to identify and classify organisms as they are being studied
Explanation:
Taxonomy is a process that describes and helps identify different living organisms. The process involves classification, identification, nomenclature.
What does cytoplasm represent in a zoo/what is the function of cytoplasm in a plant cell
3. Which of the following is NOT a cause of genetic mutations?
a. Random events
b. Nature
c. Environmental factors
d. Chromosomes
Answer:
I'd assume nature isn't a cause of genetic mutations
Explanation:
the lining of the marrow cavity.target 1 of 5 2. blankcells that can dissolve the bony matrix.target 2 of 5 3. blanklayers of bone matrix.target 3 of 5 4. blanksmall channels that radiate through the matrix of bone.target 4 of 5 5. blankcells that can build bony matrix.
Each description should be matched with the correct and appropriate terminology as follows:
Endosteum: the lining of the marrow cavity.Osteoclasts: cells that can dissolve the bony matrix.Lamellae: layers of bone matrix.Canaliculi: small channels that radiate through the matrix of bone.Osteoblasts: cells that can build bony matrix.What is a cell?A cell can be defined as the fundamental functional, structural and smallest unit of life, which is found within the body of an organism.
What is a joint?A joint can be defined as a point where two (2) or more bones in the body of an organism (skeletal system) make contact, so as to facilitate the easy movement of body parts.
In Science, cells that have the ability to dissolve the bony matrix are generally referred to as osteoclasts while cells with the ability to build bony matrix are generally referred to as osteoblasts.
Furthermore, the membrane which acts as a lining of the marrow cavity is generally referred to as endosteum and it is mainly responsible for the following:
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There is a net movement of water into a cell from the surrounding tissue fluid. Is the tissue fluid more or less concentrated than the fluid inside this cell?
Answer:
Less concentrated as, by osmosis, the water moves up the concentration gradient into area of most concentration.
1. Using the Universal Genetic Code Chart, fill in the missing amino acids in the amino acid
sequence for species A in the chart on the next page.
2. Using the Information given, fill in the missing mRNA bases in the mRNA strand for species
B In the chart on the next page.
The so-called "universal" or "standard genetic code," as we all learnt in high school, is a set of guidelines that specify the relationship between the "20" amino acids and the "bases" (codons) found within mRNA.
How many different amino acids are there in the human genome?There are 20 frequent amino acids in the human genetic code. Additionally, the codons UGA and UAG, which are often used as stop signals, are used to encode selenocysteine (Sec) и pyrrolysine (Pyl), the twenty-first and twenty-second amino acids, respectively.
Is there a common genetic information for amino acids?Except for a few prokaryotes, cells with mitochondria, and chloroplasts, every organism, including viruses, bacteria, and humans, has the same genetic code. The dining room table .
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which of the following sources would likely have mitochondrial DNA but lack nuclear DNA?
a: newly deceased victim
b: highly decomposed skeletal remains
c: biological fluids left at a crime scene
d: hair that has fallen from a suspects head
The source that would likely have mitochondrial DNA but lack nuclear DNA is highly decomposed skeletal remains; option B.
What is DNA?DNA is the molecule found in living organisms that contains the genetic information of the living organism.
It is a double-stranded helical structure molecule composed of nucleotide monomers linked by phosphodiester bonds.
The DNA in living organisms is found in the nucleus o the cell as well as in the mitochondria of cells.
The DNA in the nucleus is known as nuclear DNA whereas the DNA in the mitochondria is known as mitochondrial DNA.
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Could someone explain to me why people test for macromolecules in labs at school? Also, I can't find any background information on the lab, where we tested for macromolecules in stomach acid. Could anyone help find any information on the background of this lab?
Thanks in advance to anyone that helps! :)
Students perform tests of macromolecules in a laboratory to test whether lipids, carbohydrates, and proteins are present in various foods.
What are macromolecules?A macromolecule is defined as a very large molecule that is important to various processes like protein or nucleic acid. It is made up of covalently bonded atoms. Many macromolecules are polymers of smaller molecules which are called monomers. Carbohydrates, lipids, proteins, and nucleic acids are the four main types of a macromolecule which are necessary for normal function as well as the survival of our body. We can use indicators to test the presence of macromolecules such as lipids, carbohydrates, and proteins in many foods in laboratory. We will be testing for the presence of carbohydrates such as glucose, and sucrose as well as complex carbohydrates such as starch and proteins.
So we can conclude that we can test macromolecules in labs at school to check the presence of lipids, carbohydrates, and proteins in various food items.
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Once a cell completes mitosis, molecular division triggers must be turned off. What happens to mpf during mitosis?.
The cyclin component of MPF is degraded.
What is mitosis?
During the phase of the cell cycle known as mitosis, duplicated chromosomes are physically split in half to form two new nuclei. Mitosis is a method of cell division that results in the production of cells that are genetically similar and in which the total number of chromosomes is preserved. Since this occurs during mitosis, the process is often referred to as equational division.
The cyclin-Cdk complex is the Maturation-promoting factor (abbreviated MPF, also known as a mitosis-promoting factor or M-Phase-promoting factor). It stimulates the cell cycle's mitotic and meiotic stages. Cyclins and cyclin-dependent kinases (Cdks) are in charge of the cell's progression through the numerous checkpoints.
Cyclin-CDK is a protein complex composed of an inactive catalytic subunit of a protein kinase, cyclin-dependent kinase (CDK), and a regulatory subunit, cyclin.
Synthesized cyclins function as activating proteins and attach to Cdks to create a cyclin-Cdk complex. This compound then functions as a signal for the cell to enter the subsequent phase of the cell cycle.
Inactivation of this same complex is also essential for the transition from mitosis to the G1 phase of cell division. This is accomplished through ubiquitination and proteolytic destruction of cyclin B by the anaphase-promoting complex (APC), a ubiquitin ligase.
Hence, the cyclin component of MPF is degraded.
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What is the smallest number of molecules of atp and gtp consumed in the synthesis of a protein with 200 residues after mrna synthesis, starting from amino acids? assume that the hydrolysis of ppi is equivalent to the hydrolysis of atp for this calculation.
The smallest number of molecules are 200 ATP and 400 GTP consumed in the synthesis of a protein with 200 residues after mrna synthesis.
What is mrna synthesis and what is ATP and how many ATP and GTP are consumed?mRNA is one of the RNA of ribosomal, manufacture, and transfer RNA synthesized in nucleus using the nucleotide sequence of DNA as template.ATP is adenosine triphosphate used as energy molecules to process the needed function of human and plant body.In here is asked the smallest number of molecules of ATP and GTP consumed in the synthesis of a protein with 200 residues after mRNA synthesis.The answer would be 200 molecules of ATP and 400 molecules of GTP consumed to synthesize protein.To know more about mRNA visit :
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Describe how a decrease in populations in populations of socondary consumers in an ecosystem would impact both the primary consumer level and h primary producer level
A deceease in the secondary consumers in an ecosystem can impact both primary consumers and primary peoducers. The reason why it impacts primary consumers is because they no longer are pret causing them to over populate. The over population of the primary consumers impacts the primary consumers because now there are too many primary consumers that need food. Eventually the primary producers will become exctinct due to the primary consumers eating the primary producers. When the primary producers die out so will the primary consumers, for their food source is gone.
A decrease in populations of secondary consumers in an ecosystem can have significant impacts on both the primary consumer level and the primary producer level.
What are the negative effects caused due to increase in herbivores?At the primary consumer level, the number of secondary consumers decreases which increases the number of primary consumers, as there are fewer predators to consume them.
This can put additional pressure on the primary producers because of the presence of more herbivores competing for limited resources. The increase in herbivores results in the depletion of plant populations, which can have negative effects on the entire ecosystem.
At the primary producer level, the decrease in populations of secondary consumers also decreases the number of predators, that allow herbivores to reproduce rapidly putting additional pressure on the primary producers.
Therefore, the decrease in populations of secondary consumers can alter the balance between predator and prey populations thereby disrupting the relationships between different trophic levels.
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Smooth muscle forms rings called ___________ that are usually contracted but relax periodically to allow substances to pass through them.
Answer:
sphincters
Explanation:
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