Answer:
Muscle contraction function.
Explanation:
The nerve endings possess synaptic acetylcholine vesicles ready to be released. The action potential depolarizes the presynaptic terminal and increases the concentration of axoplasmic calcium; Acetylcholine molecules are thus released, so that the concentration of the neurotransmitter at postsynaptic (nicotinic) receptors is temporarily increased. This is followed by post-synaptic membrane depolarization, muscle membrane action potential with increased rnioplasmic calcium concentration, and finally muscle contraction. Acetylcholine is hydrolyzed by acetylcholinesterase and resynaptic at the presynaptic level by cholinecetyltransferase. The etiopathogenesis of myasthenia gravis is autoimmune and there are antibodies against acetylcholine receptors that circulate in the blood, as well as a decrease in the number of receptors on the motor plates, that is, it is produced by the postsynaptic blockage of the myoneural plaque, that generates fatigue and localized or generalized muscle weakness that is characterized by the worsening of the contractile force of the muscle.
Leading and lagging DNA strands exist at a replication fork because ___________.A. the DNA polymerase can add new nucleotides onto either the 3' end or the 5' end B. the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5' end C. the two strands of DNA are parallel and DNA polymerase can only add new nucleotides onto a 3' D. end the two strands of DNA can be either parallel or antiparallel the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 3' end
Answer:
B. the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5' end
Explanation:
Deoxyribonucleic acid, known as DNA, is the genetic material of a cell, which must first undergo replication i.e produce two identical copies of itself, before a cell can divide. During replication, the double stranded DNA unwinds into a replication fork consisting of two single strands of DNA.
These single strands of DNA are called leading strand (runs from 3'-5') and lagging strand (runs from 5'-3'). These single strands that runs at opposite direction from one another exists at the replication fork because the two strands of DNA are antiparallel i.e. are opposite to one another, and DNA polymerase can only add new nucleotides onto a 5' end.
Leading and lagging DNA strands exist at a replication fork because the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5 'end.
A replication fork is the juncture between two strands of DNA when it is replicating itself.
In each of them (speaking of the homologous strands) the opposite chain is carried out to have the double genetic information when approaching cell division.
The direction in which the enzymes act is unique from 5 'to 3', this determines the template chain must have the direction 3'→ 5', so that the new chain in formation, complementary and antiparallel, has the direction 5 '→ 3' coinciding with the enzyme's working system.The basic reaction that takes place in replication is a polymerization reaction, in a growing DNA chain a nucleotide is incorporated whose base is complementary to that of the template chain.The DNA polymerases at the two ends of the free nucleotide to be incorporated use its phosphate group or 5 'end to add it to the growing chain.Therefore, we can conclude that leading and lagging DNA strands exist at a replication fork because the two strands of DNA are antiparallel, and DNA polymerase can only add new nucleotides onto a 5 'end.
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Which of the following best describes the role of the nervous system?
A. responds to all internal and external stimuli
B. detects only stimuli from outside an organism
C. responds only to stimuli occurring inside an organism
D. detects internal and external stimuli at the cellular level
I think it is A! The nervous system reacts to all internal/external, such as hormones, touch, sound, disease, etc
1. what is carrying capacity?
2. What are the variables in carrying capacity?
3. What is a sustainable food source?
4. What is a lasting food source?
5. Why is it important to control the species population?
What is meant by obesity?
Answer: The condition of being grossly fat or overweight.
Brainliest please?
Answer:
Obesity is a disease that people have when they have extra body fat.
Explanation:
obesity is not only a physical problem but it is also a medical problem. when you are obese you are prone to have heart problems. The diseases that are caused by obesity can range anywhere from heart disease to certain types of cancers.
substances which are harmful to our environment is called?
Answer:
pollutants or ecologically unfriendly items
plz mark me as brainliest.
difference between blood and lymph
Explanation:
Hope this is helpful
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Blood has RBC's, WBC's, platelets and a fluid called plasma. Whereas lymph has WBC's and watery fluid. They both have immune and also circulatory functions in them. One of the major differences between them is that blood flows through blood vessels and lymph through lymphatic vessels.
_________________
~ hαppч lєαrníng ~
All of Earth's biomes considered together represent:
A. population
B. community
C. biosphere
D. ecosystem
All of Earth's biomes considered together represent biosphere.
What is a biome?A biome is an amalgamation of plants and animals with similar traits for their habitat. Biomes can be found in many different locations. They are biological communities that have developed as a result of the area's common physical climate.
What is a biosphere?The biosphere is a small area of the earth's surface where soil, water, and air work together to support life. Only in this region is life possible.
What is a population?A population is a collection of people who can interbreed, share resources, or compete with one another for those resources.
What is a community?A community is defined as a collection of individuals belonging to various species who reside in the same region.
What is an ecosystem?An ecosystem is a biotic and abiotic component-based functioning unit of nature. Air, water, and soil are examples of abiotic components. The biotic components are producers, consumers, and decomposers.
To learn more about biome and biosphere here,
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2- Clasifica los siguientes sistemas en abierto, cerrado o aislado:
a. una cazata de helado c. una lata de arvejas e. un vaso con jugo
b. una bolsa de 1kg de arroz sin abrir d. un termómetro f. un perro
3- Clasifica los siguientes sistemas en homogéneo y heterogéneo e indica el número de fases:
a. limonada con hielo c. agua y aceite e. agua gasificada
b. agua y acetona d. tierra, arena y piedras f. café con leche
4- En un laboratorio se realiza un experimento para estudiar la flotabilidad de cuerpos
en el agua.
a. Indica qué partes componen el sistema y cuál es el ambiente.
b. Clasifica el sistema como abierto, cerrado o aislado.
c. ¿En qué estado físico está cada componente del sistema?
d. ¿Cuántas fases tiene?
e. ¿Es homogéneo o heterogéneo?
5- El recipiente de la imagen tiene agua coloreada y está tapado.
a. Identifica qué partes componen el sistema.
b. Clasifica el sistema en abierto, cerrado o aislado.
c. ¿El sistema es homogéneo o heterogéneo?
d. Si enfriamos el recipiente hasta obtener hielo,
¿cambiará la masa del sistema? Justifica
6- Se está estudiando la vida de los peces en una pecera que se encuentra encima de una mesa en el laboratorio.
a. Dibuje lo descrito arriba y señale cuál es el sistema, el límite y cuál es el ambiente.
b. Clasifique el sistema según la interacción con el ambiente, justificando su respuesta.
c. ¿Es homogéneo o heterogéneo?
Answer:
Las respuestas se dan a continuación.
Explicación:
1) Una búsqueda de helado y un vaso con jugo es un sistema abierto, un perro es un sistema aislado mientras que una bolsa de 1 kg de arroz sin abrir, un termómetro y una lata de guisantes es un sistema cerrado.
2) la limonada con hielo, el agua carbonatada, el agua en acetona y el café con leche son sistemas homogéneos mientras que el agua y el aceite, la tierra, la arena y las piedras son sistemas heterogéneos.
3) El recipiente de la imagen tiene agua coloreada y está tapado.
B. el sistema está cerrado.
C. El sistema es homogéneo.
D. Si enfriamos el recipiente a hielo, la masa del sistema no cambiará.
4- Se estudia la vida de los peces en una pecera que se encuentra sobre una mesa en el laboratorio.
a. El sistema es abierto y el medio ambiente es acuático.
B. Es un sistema heterogéneo.
Energy + 6 CO2
6 H20 → CH2206
602
Photosynthesis
O Cellular Respiration
help ‼️
Answer:
photosynthesis
Explanation:
Identify 3 characteristics that plants share with algae.
Explanation:
I am sure you are clear. Thanks.
Alice wanted to see if a new premium gasoline would give her more kilometres per litre. She filled her car with the new gasoline and went on a long trip. When she calculated her mileage, she discovered that she has gone 40 kilometres further on this tank of gas than she went on a tank of regular gas when she was driving around town as usual. She decided to buy the premium gas from then on to get better mileage. What are the errors in this experiment?
Answer:
She didn't cover the same distance for the new premium gasoline and regular gas
Explanation:
diagram represent the generalized animal cell
Answer:
penge like please at pa follow
Refer to the image attached.
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called , which form a complex with RISC and degrade specific .
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme “dicer” cuts dsRNA into smaller fragments called siRNA, which form a complex with RISC and degrade specific RNA.
siRNA or small interfering RNA as a part of RISC complex finds and binds to complementary mRNA and it induces the cleavage of mRNA. This causes degradation of that mRNA. This is the way RNA interference prevents translation.
Answer:
RNA interference is a mechanism of eukaryotic gene regulation. In this mechanism, the enzyme "dicer" cuts dsRNA into smaller fragments called ( small interfering RNA (siRNA) ) which form a complex with RISC and degrade specific ( mRNA)
Explanation:
:)
Aerobic respiration requires this molecule, but Lactic Acid fermentation does not.
Carbon Dioxide
Glucose
Ethanol
Oxygen
Aerobic respiration requires Oxygen molecule, but Lactic Acid fermentation does not.
Aerobic respiration takes place in the presence of Oxygen, but Lactic Acid formation and fermentation doesn't require Oxygen.
Which statement is incorrect about the adult human heart?
Question 28 options:
Blood in the right ventricle is deoxygenated.
Blood in the left ventricle is deoxygenated.
Blood in the pulmonary artery is deoxygenated.
Blood in the pulmonary vein is oxygenated.
Answer not listed
Answer:
B. Blood in the left ventricle is deoxygenated.
Explanation:
Human heart consists of four chambers namely: right atrium, right ventricle, left atrium and left ventricle. These chambers work hand in hand to perform the function of circulating blood throughout the body.
- The RIGHT ATRIUM receives deoxygenated blood from the heart and passes it to the RIGHT VENTRICLE, which pumps it to the lungs in order to be oxygenated.
- The LEFT ATRIUM receives oxygenated blood from the lungs and passes it to the LEFT VENTRICLE, which pumps it into the body.
- Also, the pulmonary artery carries deoxygenated blood into the lungs for oxygenation while the pulmonary veins carry oxygenated blood from the lungs
Based on the above explanation of the right & left atria and the right & left ventricles, it is FALSE that the blood in the left ventricle is deoxygenated. It is rather oxygenated.
Which of the following mechanisms is the correct sequence of events that takes place during the plant responses to internal and external signals?
A) transduction, reception, and response
B) reception and transduction
C) reception, transduction, and response
D) reception and response
Answer:
C) reception, transduction, and response
Explanation:
Plant signaling means that information is conveyed from receptor systems to effectors within and between plant cells.
Signals can be of chemical form or electrical form.
Plant responses to internal and external signals take place in the following sequence:
Reception
Transduction
Response
So, option C) is correct
please help ill give brainliest! its science i need to know the answer
First figure has the lowest pitch
Answer:
1 I'm pretty sure
Explanation:
The vocals are getting slowly gradually overtime.
They are also smaller than the other options.
Match each graph with its correlation coefficient.
+1.0
+0.85
+0.15
-0.50
-1.0
Answer:
-0.50
Explanation:
For the graph displayed, the most probable value of the correlation Coefficient is - 0.50 ; the line of best fit has a negative skoe and hence will have a negative relationship as the correlation Coefficient is a statistical value which measures the degree of relationship between two variables. Also, the distribution of data in the plot does not give a perfect fit, hence a correlation Coefficient of - 1.0 isn't possible for the distribution shown.
Answer:
fist graph: -0.50
second graph: +0.85
third graph: +0.15
fourth graph: +1.0
fifth graph: -1.0
Explanation:
im pretty sure this is the correct answers
Can someone plz help me on this science its due today and STAAR test is next week
Answer:
answer is c
Explanation:
hope it helps!!!
will give 15 points and brainliest just awnser like
1.ghkdigh
2.ighdf
3.ygf
and so on thanks!
Answer:
1.Law of conservation of energy
2. Energy transformation
3.Friction
4. electric, thermal
5. Kinetic, Potential
6. Potential, Kinetic
7.Kinetic
8.Radiant, electrical
9. Electrical
10. Radiant
WILL GIVE BRAINLIEST!!!
The spongy layer____
A.) can't do photosynthesis
B.) is the outermost layer
C.) has no chloroplasts
D.) contains stomata
Answer:
B
Explanation:
is the outermost layer
3 цуулы дфеу игешеы щл гмг фтнцфны еру зукыщт фищму ьу шы сщккусею
Please help ;(
question and answer options in photo
zoom in if needed
Thank You :D
Answer:
B Decomposers
Explanation:
There is nothing to eat the dead animals/ leaves for when they die
Answer:
I believe the answer is, B
which of the following is correct about cells?
Answer:
The answer is the c part that states, in prokaryotes, there are no membrane-bound organelles.
The organelles are surrounded by the single or double membranes such as Lysosomes, mitochondria, nucleus, Golgi Bodies, chloroplasts, Endoplasmic Reticulum and so on.
However, these all are not present in the prokaryotes type of cell.
Explanation:
please mark this answer as brainliest
Easy question about plant water loss?
Answer:
B,C,F
Explanation:
Drag the tiles to the correct boxes to complete the pairs. Identify the types of inheritance based on the expression of alleles in the organism. dominant recessive multiple presence of many alleles for the trait to be expressed  presence of two alleles for the trait to be expressed  presence of a single allele for the trait to be expressed 
Answer:
1-Dominent 2-Multiple 3-recescive
Explanation:
but pls try and work it out multiple times bc I got this but u might get differently
Look at image please
Answer:
This is easy: 2 Hydrogen and 1 Oxygen!
Explanation:
H20 means 2 H and 1 O
Answer:
Explanation:
PLEASE HELP ASAP
A population of fish has a carrying capacity of 2,200 fish, with a maximum rate of increase of 1.0 per individual per year. Using the logistic population growth model, what is the approximate population growth rate for a population of 1,580 fish?
259 fish per year
360 fish per year
445 fish per year
863 fish per year
Answer:
258 fish per year asap asap asapAnswer:
its 445
Explanation:
The human body organ known as the pancreas secretes the hormones insulin and glucagon. These hormones regulate the level
of glucose in the bloodstream. If the level of glucose is too low, the pancreas secretes glucagon which causes the glucose level
to increase; if the glucose level is too high, the hormone insulin will lower the glucose level.
What name is given to this type of regulatory system?
A)
endocytosis
B)
homeostasis
meiosis
D)
symbiosis
The pH of a solution is a measure of how acidic or basic it is. The greater the pH, the more basic the solution is. Corals and other marine invertebrates require less energy to make their exoskeletons and shells when ocean water is slightly basic. As carbon dioxide concentrations in Earth’s atmosphere rise, ocean water absorbs carbon dioxide and becomes more acidic. This process is called ocean acidification. How do you think ocean acidification will affect the coral reef?
Explanation:
Because coral reefs have limestone (calcium carbonate), the coral reefs will be greatly affected. The increase in hydrogen ions in the ocean will corrode the coral reef, making it inhabitable for species. This will affect the crabs that get their food and the community that lives within in it. Making countless of species to loose their lives and their way if living.
Consumers in the reef can be further classified as filter feeders, or organisms that eat plankton by filtering water; grazers, or organisms that feed on organisms that don’t move; and predators, or organisms that eat other animals. List at least one example of each.
Filter Feeders -
Gazers -
Predators -
Answer:
Filter feeders-tubeworms, basket stars, clams,& sponges... there are many more
Grazers- Sea urchins, damselfish, surgeonfish & cobalt algae... and more
Predators- whales, sharks, barracudas, &dolphin... several more
Muliple choices
Hope this helps :)
