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Answer:
Explanation:
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how neurotransmitters carry nerve impulses across the synaptic cleft
how neurotransmitters carry nerve impulses across the synaptic cleft?
Neurotransmitters move between the axon and the dendrite of the following neuron through the synapse. Neurotransmitters bind to the dendrite's membrane. The nerve impulse can go through the receiving neuron because of the binding.
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Humans benefit from natural resources every day. For example, right now you're using a computer or similar device
to read this question. Can you name any natural resources that were likely used to build this device? What natural
resources are you using by operating it?
Answer:
copper
Explanation:
is a mineral used to make electrical conductors because of its durability.
human beings are also natural resources,so by me operating this computer,am utilizing myself as a natural resource.
The laptop is a device which is generally used. It is composed of electrical conductors which contains metals such as copper. Copper is a natural resource.
What are Natural resources?Natural resources are those resources which are drawn from the nature and are used with few modifications. This includes the sources of valued characteristics such as those for commercial and industrial use, aesthetic value, scientific interest, and cultural value.
Copper is a highly recyclable, non-renewable natural resource. It is present in a finite amount and cannot be regenerated once used fully. Copper is a soft and malleable metal which is used in the electrical wires and cables for its good conductivity, in the industrial machinery and construction materials for its durability, machinability, and corrosion resistance, and also the ability to be cast with high precision.
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Which of the following is an organism whose cells each contain a membrane
bound nucleus?
Answer:
D. Eukaryote
Explanation:
An organism that has membrane-bound organelles will have more complex organelles like mitochondria, Golgi apparatus, and ER. These are known as Eukaryotes. Additionally, they will have a nucleus that has the DNA coiled inside. Prokaryotes do not have membrane-bound organelle and the DNA floats in the cytoplasm. Most plants and animals are eukaryotes and all multicellular organisms are too.
why is it important to keep the temperature and amount of water the same when testing the surface area.
Answer:
The temperature and the amount of water need to be kept the same so that the only variable that changes is surface area
Explanation:
Answer:
The temperature and the amount of water need to be kept the same so that the only variable that changes is surface area. If you allow the temperature and/or the amount of water to change too, you will not know which variable is causing the changes that you observe
Explanation:
edge sample
what are the causes of the environmental pollution ?
elevated the prediction using the specific experimental procedure they collected the experimental by catching mice on the beach and releasing them in lines and by catching mice from Inland releasing them on beach it wash to see if they were eaten by predators predators true or false
Answer:
True
Explanation:
The mice captured from beach would find it difficult to move in lines as it has habit to move freely in any direction. The mice will move slowly. The second mice captured from inland and released on beach would first wait before moving and it will analyze the environment. There are high chances that it nay be eaten by predator such as crab.
What is the relationship between CdKs and cyclins?
Answer:
By definition, a CDK binds a regulatory protein called a cyclin. Without cyclin, CDK has little kinase activity; only the cyclin-CDK complex is an active kinase but its activity can be typically further modulated by phosphorylation and other binding proteins, like p27.
How does the ear pick up sound waves from the external environment? (any bots or links added will be reported!)
Answer:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.
Explanation:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.Answer:
Explanation:
Part of the east coast of South America and the west coast of Africa have matching fossils within the same series or rock layers. This provides evidence that these continents were once *
A) Separated by a much larger ocean
B) Joined together as one landmass
C) located near the North Pole
D) In a different hemisphere
Describe two ways in which the above law protects citizens against human trafficking
Answer:
The law in question is not included so I will include tow different laws and how they protect people from human trafficking.
1. The Victims of Trafficking and Violence Prevention Act (TVPA).
This Act made human trafficking a Federal crime while also establishing rules on how to prosecute human traffickers and getting the victims of trafficking reintegrated into society and protected. Under this Act therefore, citizens are protected because the law would act as a deterrent to a lot of would-be traffickers.
2. The Mann Act of 1910.
Under this Act, it is a crime to make promises to people such that they cross state lines and are then involved in activities they did not sign up for - this is a definition of human trafficking so this law protects citizens from that.
Which epithelial lining is found in the trachea
Rickettsia typhi is a species of infectious bacterium that is an obligatory intracellular parasite. This means that, similar to viruses, R. typhi cannot reproduce and survive outside of a eukaryotic cell. Why do we consider viruses nonliving, but rickettsia alive
Answer:
Due to its characteristics.
Explanation:
We consider viruses are nonliving, but rickettsia are living because rickettsia have the characteristics of bacteria which is a living and has unique structure. It also survives outside the living cell but not for long time. The rickettsia remain in their shape and does not form crystalline structure like viruses outside the cell. If there is suitable environment for rickettsia, it can survive in that environment.
which organisms replicate cells by mitosis?
a. animals and bacteria
b. bacteria and plants
c. animal and plants
d. archaea and bacteria
e. archaea and plants
Answer:
d.??????????????????
Answer: C!
Explanation: eukaryotic cells may divide via either mitosis or meiosis. only sexually reproducing eukaryotes can engage in meiosis. all eukaryotes — regardless of size or number of cells — can engage in mitosis.
Having no cell nucleus, archaea do not reproduce via mitosis; rather, they procreate using a process called binary fission. So D AND E are eliminated. And so is B because that has bacteria.
SO FINAL ANSWER; mitosis happens in eukaryotes, plant and animal cells
Which choice refers to a single population?
i need help asap please!!
Answer:
commensalism
an association between organisms in which one benefits and the other derives nor harm
1 Producers
why this is true?
consumers.
generally found at the beginning
of a food chain. Which statement best explains
(1) Producers are usually smaller in size thân
(2) Producers do not rely on other organisms
(3) There are always more consumers than
producers in food chains
(4) Consumers are always more complex organisms
than producers.
for food.
Answer:
(2) Producers do not rely on other organisms
If the number of photosynthetic organisms on Earth decreased drastically, which would happen as a result?
A. Less water would be available on Earth’s surface.
B. Less solar energy would reach Earth’s atmosphere.
C. More oxygen gas would be found in Earth’s atmosphere.
D. More carbon dioxide gas would be found in Earth’s atmosphere.
Question 4 (2 points)
Which system has atoms with the highest average kinetic energy?
room temperature
non of these
cold water
warm water
Answer:
warm water
Explanation:
Kinetic energy refers to the energy that possesses an object due to the motion of its molecules. Kinetic energy is positively associated with temperature. When heating water, water molecules gain kinetic energy and move faster than the molecules of cold water. In consequence, the temperature of an object can be considered as the average amount of kinetic energy that its molecules carry.
lysogenic cycle reproduction steps
What usually happens as more farmland is converted to urban land?
A. People grow more crops
B. The amount of cropland increases
C. People eat more fresh foods
D. Food prices increase
Food prices increase when more farmland is converted to urban land. The correct option is D.
What are farmlands?Farmland is land that is temporarily covered in agricultural crops (areas with numerous crops are only included once), temporary grazing or mowing meadows, market and kitchen gardens, and land that is temporarily fallow.
Urban development entails transforming a region into an urban state in a variety of ways, including physically, geographically, economically, and societally, through changes in population and land use.
Food security decreased agricultural output, and agricultural labor is only a few of the repercussions of turning farmland into urban expansion. Because there is less land available for crop cultivation as a result of urban growth, local food prices may rise.
Therefore, the correct option is D. Food prices increase.
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¿QUE SON LOS SENTIMIENTOS? *
Answer:
pues es lo que el ser humano siente hacia los demás o ante alguna situación incluidos tristeza, alegría, temor, miedo, odio y amor aunque para mi los dos últimos no deberían ser sentimientos sino una decisión.
Which of the following adds oxygen to the atmosphere?
A.forest fires
B.the weathering of rocks
C.photosynthesis
D.life processes of animals
Helppppp I will make brainliest
The process of photosynthesis adds oxygen to the atmosphere. Option C is correct for the given statement. In the atmosphere, nearly 21% oxygen is present.
What is the gas constituent of the atmosphere?In the atmosphere, different gases such as oxygen, nitrogen, carbon dioxide, and water vapour are present. These differ in composition, with oxygen accounting for 21%, nitrogen accounting for nearly 78%, and carbon dioxide accounting for less than 1%.
The oxygen is produced by the process of photosynthesis that is undertaken by green plants. The phytoplankton, algae in aquatic habitats, and plants of the terrestrial ecosystem do photosynthesis because of the presence of chloroplasts.
This oxygen is used by animals and plants for cellular respiration. Others are incorrect options because forest fires increase carbon dioxide in the atmosphere, animals take oxygen from the atmosphere, and rock weathering does not add oxygen.
As a result, option C is the correct answer because photosynthesis produces oxygen for the atmosphere.
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Which statement about ecosystems is true
The correct answer is D. Ecosystems are always smaller than a biome.
Explanation
A biome is a set of abiotic factors that form a territory in which different organisms inhabit. In addition, biomes encompass a set of ecosystems such as tundra, rainforest, savannas, wetlands, among others. On the other hand, an ecosystem is a community of organisms that interact with other organisms and abiotic factors. According to the above, the correct answer is D. Ecosystems are always smaller than a biome becaause biomes includes ecosystems with similar features.
A protein has a molecular mass of 400 kDa when measured by gel filtration. When subjected to gel electrophoresis in the presence of sodium dodecyl sulfate (SDS), the protein gives three bands with molecular masses of 180, 160, and 60 kDa. When electrophoresis is carried out in the presence of SDS and b-mercaptoethanol, three bands are again formed, this time with molecular masses of 160, 90, and 60 kDa. Determine the subunit composition of the protein (how many and what sizes) and why you observe the different banding pattern under the two conditions.
Answer:
subunit composition
how many: 4 subunitswhat sizes: 160 kDa, 60 kDa, 90 kDa, and 90 kDa.Explanation:
SDS is a detergent that denaturalizes the protein and sets a relation charge size, such as that the motion of the protein in the gel is proportional to its weight. However, the detergent can not disrupt disulfide bridges, so these bonds remain together. The bigger the protein is, the stronger interaction with the polyacrylamide gel there will be. The speed of displacement in the electromagnetic field is inversely proportional to the protein size.
On the other hand, b-mercaptoethanol acts as a reductive agent, breaking disulfide bonds. This chemical produces a complete denaturalization resulting in the unfolded protein. If disulfide bridges kept two protein subunits together, the b-mercaptoethanol separates them.
So, the most important data we need to consider here is that SDS can not disrupt disulfide bridges, while b-mercaptoethanol can.
Available data:
A protein has a molecular mass of 400 kDaSDS → three bands with molecular masses of 180, 160, and 60 kDaSDS + b-mercaptoethanol → three bands with molecular masses of 160, 90, and 60 kDaSDS
180 + 160 + 60 = 400 kDa
SDS + b-mercaptoethanol
160 + 90 + 60 = 310 kDa
The difference between them is 400 - 310 = 90 kDa, meaning that there is a subunit of 90 kDa that is not being detected by SDS alone.
From both measures ( SDS and SDS/b-mercaptoethanol) we can assume that subunits 160 kDa and 90kDa are the same. So the difference is in the left subunit ⇒ 180 and 90, respectively.
180 - 90 = 90 kDa
We can assume that the 180 kDa subunit is composed of two 90 kDa subunits joined by a disulfide bridge. SDS alone could not disrupt this bond, so it detected a unit of 180kDa. b-mercaptoethanol detected this bond and broke it, generating two 90 kDa units, which migrated together in the gel, so they were expressed as the same band.
This difference suggests that the protein is formed of 4 subunits. One of them is 160 kDa, another one is 90 kDa, and the last two subunits are 90 kDa each.
Which of the following describes copepods?
tiny, single-cell creatures that scientists believe were instrumental in the development of evolution
small sea crustaceans from the order of macroplankton of about 20-200 millimeters that are visible with the naked eye
microscopic organisms that drift in both marine and freshwater environments and perform photosynthesis
a genus of large brown seaweed that floats in island-like masses, called beds, and is common in waters off the U.S. South Atlantic coast
Answer:
single-cell creatures that scientists believe were instrumental in the development of evolution
small sea crustaceans from the order of macroplankton of about 20-200 millimeters that are visible with the naked eye
letter of invitation to parents
Answer:we need a question here?
Explanation:
Each of the tissues listed below has a specialized function that is linked closely to the structures found within the tissue's cells. Match each tissue on the left with the cell structures and/or organelles on the right that would be abundant in the tissue's cells. Use your lab manual or other outside resources for a description of any structures or organelles that are unfamiliar to you.
Insect flight muscles [Choose ] <
Cells lining the respiratory passages [Choose ] <
White blood cells that engulf and destroy invading bacteria [Choose ]
Leaf cells of cacti [Choose] <
Goblet cells lining the intestinal tract that secrete mucus [Choose ] < [Choose ]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins)
Option of definitions:MitochondriaChloroplastsRibosomesCilia and FlagellaGolgi apparatusLysosomes
Answer:
Insect flight muscles [Mitochondria]
Cells lining the respiratory passages [Cilia]
White blood cells that engulf and destroy invading bacteria [Lysosomes]
Leaf cells of cacti [Chloroplasts]
Goblet cells lining the intestinal tract that secrete mucus [Golgi apparatus]
Pancreatic cells that are responsible for creating several digestive enzymes (proteins) [Ribosomes]
Explanation:
Mitochondria are cell organelles whose main function is energy generation during respiration. They generate energy in the form of ATP which is then used by the cells and tissues for various metabolic function. Mitochondria are abundant in cells whose energy requirements are high such as muscle cells. Therefore, insects flight muscles will have an abundance of mitochondria.
Cilia are finger-like projections on respiratory surfaces whose sweep-like movements help to move particles and fluids out of the airways. In the trachea, the cilia trap particles like bacteria and viruses and then move these trapped particles along with mucus up to the pharynx where it is either coughed out or swallowed into gastrointestinal tract. Therefore, respiratory surfaces like the trachea will have an abundance of cilia.
Lysosome are cell organelles which function to destroy and digest foreign and cellular proteins in the cell. They have an abundance of proteolytic enzymes which degrade proteins at acidic pH. Therefore, white blood cells that engulf and destroy invading bacteria will have an abundance of ysosomes.
Chloroplasts are plant cells organelles which are the sites for photosynthesis. It is abundant in the leaves of plants where photosynthesis mainly take place. Therefore, leaf cells of cacti will have an abundance of chloroplasts.
Golgi apparatus is a cell organelle that helps process and package proteins and lipid molecules, especially those that are to be secreted outside the cell, packaging them into vessicles. They also make and secrete mucus. Therefore, goblet cells lining the intestinal tract that secrete mucus will have an abundance of Golgi apparatus.
Ribosomes are cell organelles whose main function is to synthesize proteins, both for intracellular and extracellular purposes. Proteins such as hormones, enzymes etc, are synthesized by the ribosomes. Therefore, pancreatic cells that are responsible for creating several digestive enzymes (proteins) will have an abundance of ribosomes.
There are different kinds of tissues in the body.
Insect flight muscles is found in the Mitochondria.Cells lining the respiratory passages is found in the cilia and flagella .White blood cells that engulf and destroy invading bacteria linked to the Lysosomes.Leaf cells of cacti are linked to the ChloroplastsGoblet cells lining the intestinal tract that secrete mucus linked to Golgi apparatus.Pancreatic cells that are responsible for creating several digestive enzymes linked to proteins and Ribosomes.What are the types of tissues?There are known to be 4 main types of tissue. They are: The connective tissue, epithelial tissue, muscle tissue, and nervous tissue. The Connective tissue is known as a tissue that helps to supports other tissues.
The Epithelial tissue gives a form of covering such as skin to the body.
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Translation is the process during which A.mRNA is created in the nucleus B. Glucose molecules are made C. mRNA is decided to form a protein D. Lipids are synthesized ?
Answer:
C
Explanation:
translation is the formation of amino acids
Which two kinds of information describe weather and not climate?
A. How the air pressure is expected to change tonight
B. The usual frequency of blizzards in an area
C. The average high temperature for this date over 30 years
0
D. The temperatures for the previous week
Answer:
b. the usual frequency of blizzards in an area
