Answer:
Scanning Electron Microscopes (SEM) Transmission Electron Microscopes (TEM)
Electron stream Fine, focused beam Broad beam
Image taken Topographical/surface Internal structure
Resolution Lower resolution Higher resolution
Magnification Up to 2,000,000 times Up to 50,000,000 times
Explanation:
Answer:
Scanning electron microscope: is useful for detailed study of the topography of a specimen.
Transmission electron microscope: is used to study the internal structure of cells.
Which gas is used by humans in the process of cellular respiration?
A) methane
B) nitrogen
C) oxygen
D) carbon dioxide
Answer:
oxygen is used by human in the process of cellular respiration
Who was newton please explain fast
Newton was a scientist in the 1600's who discovered gravity. He also discovered the laws of physics.
answer:
the man who discovered gravity by an apple falling on his head
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Coffee trees grown in the shade of taller forest trees produce fewer coffee beans than trees grown on cleared forestland. However, unlike coffee grown in full sun, shade-grown coffee preserves some habitat for forest birds and other organisms. What is one advantage of growing coffee in the shade?
A. It harms the environment.
B. It provides farmers with greater profits.
C. It costs more than other growing methods.
D. It helps maintain forest biodiversity.
Answer:
d
Explanation:
provides animals with homes letting them breed
It helps maintain forest biodiversity. Therefore, option (D) is correct.
One advantage of growing coffee in the shade is that it helps maintain forest biodiversity. By growing coffee trees in the shade of taller forest trees, farmers preserve some habitat for forest birds and other organisms, which can help to maintain the overall biodiversity of the forest ecosystem.
This is particularly important in regions where forests are being cleared for agricultural purposes, as it can help to mitigate the negative impact on the environment.
While shade-grown coffee may produce fewer coffee beans than trees grown on cleared forestland or in full sun, it provides important ecological benefits that are not captured by purely economic considerations
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How does excretion takes place in amoeba
Answer:
excretion takes place through body surface by simple diffusion
Answer:
Amoeba is a unicellular organism living in fresh water bodies. The waste materials are excreted by the process of diffusion through general body surface. Contractile vacuoles also play some role in removal of waste materials.
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Birds differ from their closest relatives, the reptiles, in what ways?
(choose all that apply)
the bones of reptiles are too lightweight to permit flight
birds are capable of powered flight, while some reptiles can glide
birds have feathers, reptiles have scales
only the birds lay eggs on land; the reptiles can only lay their eggs in water
the reptiles have a series of internal air sacs that allow a very efficient extraction of oxygen
birds are endothermic, while reptiles are generally ectothermic
1 pts
Answer:
birds have feathers, reptiles have scales
birds are endothermic, while reptiles are generally ectothermic
Explanation:
The main difference between birds and reptiles is that birds have feathers on their body while on the other hand, reptiles ahve dry skin and have scales. Reptiles are ectotherms, while birds are endotherms. An ectotherm relies on its external environment to regulate the temperature of its body whereas Endotherms are able to regulate their body temperatures by producing heat within the body.
Why are temperatures hotter in locations near the equator?
what happens to water when it boils
Answer:
When water starts boiling evaporation takes place
Is there a particular type of fiber that is found mostly in the mucous connective tissue???
Explanation:
connective tissue. The fixed and transient cells found in connective tissue. ... Collagen fibers - most are type I collagen (most abundant protein in the body) ... It provides tensile strength in multiple directions. slide.
write paragraph about digestion of food in brief
Answer:
Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream.
Explanation:
according to wikipedia!
Digestion is nothing but breaking down of substances into simpler forms, which the body can use. We eat many things and they have very complex compounds, our body cannot use these compounds. So, different parts of our digestive system breaks down different compounds to simpler forms, so that our body can use it for different functions.
Count the number of breaths you take in a minute and compare it with the number of times a fish opens and closes its mouth
Answer:
Don't know sorryyyyyyyyyyyyyyyyyyyyyyyyyyyyy
A gene is
1. segment of DNA
2. All of our DNA
Answer:
segment of DNA
Explanation:
they contain the code for a specific protein that functions in one or more type of cells in a body
Answer:
segment of DNA
Explanation:
There are different parts of DNA.
One of them is the gene.
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The strand of RNA moves to the ribosome.
The DNA double helix unzips.
The strand of RNA leaves the nucleus.
A protein is produced.
A strand of RNA is made from a strand of DNA.
The strand of RNA moves to the ribosome.
✔ 4
The DNA double helix unzips.
✔ 1
The strand of RNA leaves the nucleus.
✔ 3
A protein is produced.
✔ 5
A strand of RNA is made from a strand of DNA.
✔ 2
Engineers design a system for heating the air in a house. They want the
heater to bring the temperature to a comfortable level and then maintain it.
Which option describes how the engineers should design the system?
O A. Include a control in the system that senses the air temperature
and causes negative feedback, reducing the output of the heater.
O B. Design the system with a control that maintains a constant level of
output from the heater.
C. Include a control in the system that varies the input level in a
regular cycle.
Design the system with a control that allows positive feedback to
enhance the heating ability of the system,
Answer:
I think its c include a control in the system that varies the input level in a regular cycle.
Explanation:
B 3.1 Suggest which leaf carries out more photosynthesis and explain why. Below is a section of part of a plant as seen with a light microscope. (4) E e 3.2 Provide labels for: (a) different types of cells A, B and C (3) (b) structure D (c) The waxy, water-repellent layer E Provide a suitable heading for the above diagram (1) (1) 3.3 (1)
The leaf that carries out more photosynthesis is the bigger leaf since it has a larger surface area and will have more chloroplasts.
The labeled parts of the plants are found in the attachment.
A suitable heading is "parts of a plant".
What is the role of chloroplasts in photosynthesis?Chloroplasts play a crucial role in the process of photosynthesis, which is the primary means by which plants, algae, and some bacteria convert light energy into chemical energy.
Chloroplasts are the organelles where photosynthesis occurs, and they provide the necessary structures and molecules for capturing light energy, generating ATP and NADPH, and converting carbon dioxide into organic compounds.
They are essential for the survival and growth of autotrophic organisms and form the basis of the food chain on Earth.
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The oxidase test is another biochemical test used to distinguish aerobic versus anaerobic metabolism in microbes. Research the oxidase test and describe how it is performed. Include examples of oxidase-positive and oxidase-negative microbes in your answer.
Oxidase test is a biochemical test that is used to identify organisms that produce the enzyme oxidase.
Oxidase test is used to distinguish aerobic from anaerobic metabolism in microbes.
Aerobic metabolism is the use of oxygen to generate energy from a food source while anaerobic metabolism is the generation of energy with the absence of oxygen.
The procedure of oxidase test includes:
Place a piece of filter paper in a clean petri dish and add 2 or 3 drops of freshly prepared oxidase reagent.Using a piece of stick or glass rod (not anoxidized wire loop), remove a colony of the test organism and smear it on the filter paper.Look for the development of a blue-purplecolour within a few seconds as shown in colourBlue purple colour signifies oxidase positive organisms which includes Pseudomonas aeruginosa
Colourless signifies oxidase negative organisms which includes Escherichia coli
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Dehydration synthesis leads to WICH formation
Answer:
Polymers...........
Explanation:
A researcher wanted to create a loss of function mutation for studying Type I Diabetes in a model animal. What mutation would mimic Type I diabetes?
a) Inhibition of sugar absorption in the small intestine
b) Inhibition of pancreatic beta-cells
c) Up regulation of insulin receptors on the pancreas
d) Down regulation of GLUT4 transporters in muscles
Answer:
The correct answer is: b) Inhibition of pancreatic beta-cells.
Explanation:
Type 1 Diabetes is a form of Diabetes Mellitus, a condition characterized by chronic hyperglycemia (high blood sugar levels) that can compromise many organs and even cause death if not treated properly.
The most common form of Diabetes Mellitus is Type 2 Diabetes, in which the pancreas produces insulin but cannot reach the target organs because of a pathologic state called Insulin Resistance.
Type 1 Diabetes, instead, is present in patients that cannot produce insulin on their own. Insulin is the most important hormone in the regulation of blood sugar - it is secreted by the pancreatic beta-cells when glycemia rises (which is normal after eating) and it is key in allowing glucose to reach the tissues where it's needed for energy requirements. Type 1 Diabetes is usually diagnosed in young, even pediatric, patients - the pancreatic beta-cells in these individuals are destroyed and unable to function (the reason for this is not clear in all cases), so they have to be administered with exogenous insulin to survive.
For the model animal to better represent Type 1 Diabetes, the mutation would have to inhibit pancreatic beta-cells.
which among the following is not a part of pistil option a ovary option B stigama option c vein option d style
Answer:
c vein option
Explanation:
veins are parts of animals, not plants
what is the main purpose of the pupil
Answer:
to adjust how much light is let into the eye
Explanation:
Answer:
The pupil is where light enters the eye. How much light is controlled by the iris which surrounds the pupil and opens and closes it like a camera lens aperture.
Match each of the following muscles with its correct description.
a. sternohyoid
b. hyoglossus
c. frontalis
d. mentalis
1. originates on the sternum and clavicle
2. classified as an infrahyoid muscle
3. consists of two bellies
4. elevates and protrudes lower lip
on
Directions: Choose the correct answer listed from the box below and then
write the letter of your answers a separate sheet of paper for your
answers.
1. It is formed from the fossilized remains of prehistoric plants and
animals
2. An earth's material results from the rock fragments that have been
created physical weathering.
3. Another earth's material naturally occurred in solid substances that
are composed of ions and molecules bonded together.
4. The materials are derived from nature and used by the people to
survive or satisfy needs.
5. The place where natural resources are rich has fertile arable lands
and home to the largest metallic minerals
6. To use without being completely used up or destroyed
7. A practice to use the resources wisely
8. A renewable resource produces the most electricity
9. An energy resource that will run out in the next several years
10. Renewable energy coming from the sun
4.Non-renewable
E. Philippines
II. Sustainable
B Hydroelectric
F. Minerals
J. Fossil fuel
C. Soil
G. Natural resources
K. Solar Energy
D. Conservation
Select the correct answer.
How does the high specific heat of water help maintain the temperature of earth?
A By heating and cooling more slowly than land or air
B. By heating and cooling faster than land or air
с.
By heating faster but cooling more slowly than land or air
The high specific heat of water help maintain the temperature of the Earth by heating and cooling more slowly than land or air. Thus, the correct option is A.
What is the specific heat of water?The specific heat of an object is the amount of heat which is required to increase or raise the temperature of unit mass of that particular substance through one degree celsius. Specific heat is represented by the symbol 'c'. Its unit in SI system is Joule /(kg °C) and in CGS is cal / (gm °C).
The high specific heat of water helps in regulating the rate at which air changes its temperature, which is why the temperature of the planet change between different seasons is gradual rather than sudden, especially the geographical locations near the ocean.
Therefore, the correct option is A.
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water enters a long vurvykar tube at a eman tempreture taht is lower than the tine surface temperatire. The curve that most closely describes the mean tempretire of the fluid as a function of
Answer:
The curve that most closely describes the mean tempretire of the fluid as a function of position along the tube.
Explanation:
Hello. Your question is presenting very confusing words, however, through the context of the question as a whole, it is possible to see that you are saying that the water that enters a circular tube has a lower temperature than the temperature presented by the surface of the tube . In this case, if you are going to present a graph about this, it is important that this graph presents a curve that shows the relationship between the average water temperature as a function of the position of the water along the tube. This graph will be similar to the graph shown in the attached figure below.
What is the form of lipids, protein and carbohydrate that can be absorbed through small intestine?
2. What does it mean for a species to have high biological fitness? Explain in terms of survival and reproduction
Answer:
FITNESS IS THE ABILITY TO REPRODUCE FOR ANY ORGANISM
IF THEY CAN'T REPRODUCE THEY WON'T EXIST
Explanation:
Which of the following is a skin sensory receptor for touch?
A) Pacinian corpuscle
B) Meissner's corpuscle
C) Ruffini body
D) free nerve ending
Meissner's corpuscle is a skin sensory receptor for touch.
Meissner corpuscles are responsible for the sense of touch or light pressure, that is, they are very sensitive to the movement of objects on the skin and to very low vibrations.
About Meissner corpuscles:
• They are located on the lips and fingertips and are very sensitive.
• Meissner corpuscles act when there is a soft and light touch, and when vibrations are less than 50 hertz.
• These receptors can be altered when there is the presence of diseases where both thermal and tactile sensitivity are altered.
Therefore, we can conclude that Meissner corpuscles detect fine touch, that is, they are receptors on the skin that are sensitive to low-frequency vibration.
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What two different components of a telescope can be used to focus light?
Answer:
Mirror and Lens
Explanation:
Refracting telescopes use lenses to focus the light, and reflecting telescopes use mirrors
How are cells able to guarantee that are DNA is always replicated correctly every time? 
Help will give brainl
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The caterpillar, which is the larval stage of a butterfly, is very different from its adult form. Which phenomenon is responsible for this difference?
A. metamorphosis
B. regeneration
C. alternation of generation
D. molting
Metamorphosis IIRC, hope this help
Answer:
A
Explanation:
Metamorphosis is the process when large biological changes can occur like the transition from caterpillar to butterfly.
Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect gene expression. Which effector pathway is characterized by ion flux through transmitter-activated channels resulting in an altered membrane potential and neuronal activity
Complete question:
Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect gene expression. Which effector pathway is characterized by ion flux through transmitter-activated channels resulting in an altered membrane potential and neuronal activity?
A. Slow effector pathways
B. Modulated effector pathways
C. Rapid effector pathways
D. NMDA glutamate receptor pathways
Answer:
D. NMDA glutamate receptor pathways
Explanation:
The NMDA glutamatergic receptor is a cationic channel receptor modulated by a ligand that allows the transport of Na+, K+, and Ca2+. Under certain situations, it exhibits particular permeability to Ca2+. The receptor has different regions that are susceptible to modulation by endogenous and exogenous agents. The receptor can be found at most excitatory synapses, where it responds to the neurotransmitter glutamate. During synapsis, the presynaptic membrane releases L-glutamate, which is received by NMDA glutamatergic receptor. The receptor plays a regulatory role because activates signaling cascades that depend on calcium.
These receptors are involved in normal synaptic transmission, in a diverse physiological phenomenon, and might be responsible for neurodegenerative processes.
The NMDA glutamergic receptor is characterized by ion flux through transmitter-activated channels resulting in membrane potential.
What are transmitter-activated channels?Transmitter-activated channels are channels through cell membranes which are activated by binding of transmitters.
An example of a transmitter-activated channels is the NMDA glutamergic receptor.
The NMDA glutamergic receptor is a ligand-gated cationic channel that allows calcium, potassium and sodium ions through it.
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