Answer:
Electron microscope
Explanation:
Instead of using light, it utilized a beam of electron for illumination. Because an electron beam has a shorter wavelength than light (up to 100, 000 times shorter), they have a higher resolution power and are therefore able to view sub-cellular structures including DNA.
Answer:
The answer is: Electron microscope.
Explanation:
To obtain the maximum magnification and the best resolution, the electron microscope must be used, which can reveal details of up to a few nanometers (nm).
When the thin cuts are sectioned, stained and observed with the electron microscope, a delicate membrane, about 5 nm thick, that surrounds the cell is visualized.
The answer is: Electron microscope.
A multicellular eukaryotic organism that lacks cell walls and is a heterotroph belongs in kingdom...
A. Plantae
B. Archaebacteria
C. Fungi
D. Bacteria
E. Animalia
F. Protista
Answer:
E) Animalia
Explanation:
An animal is the only organism that lacks a cell wall and cannot produce its own food out of those.
The multicellular eukaryotic organism that lacks cell walls and is a heterotroph belongs in the kingdom Animalia.
Explanation:The multicellular eukaryotic organism that lacks cell walls and is a heterotroph belongs in the kingdom Animalia. Kingdom Animalia includes all animals, from insects to mammals, which are multicellular, eukaryotic, and heterotrophic organisms. They are characterized by their ability to move, their complex organ systems, and their lack of cell walls.
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Last question, how many dog breeds are there in the world?
Answer:
American Kennel Club = 202 dog breeds
Kennel Club = 211 dog breeds
Federation Cynolgique Internatioinale = 344 breeds
Interactions between organisms and their environment impact the organism’s overall population. The jaguar Panthera onca is the largest cat in North America. It is found in areas across the Southwest, including Arizona, New Mexico, and Texas. It is a carnivore that has powerful jaws and sharp teeth and preys on fish, turtles, tapirs, and many smaller mammals. Which shows the relationship between the jaguar and turtles?
Answer:
Predator-prey relation.
Explanation:
A predator is defined as an organism that hunts another individual, whereas a prey refers to the organism that is eaten by the predator. They tend to co-evolve (evolve together). The prey is essential for the predator to survive, while the predator controls the prey populations by hunting some of the individuals.
Predator-prey relations are interactions that occur between two species where one species (prey) represents a food source for the other species (predator).
The turtle (prey) is essential for the survival of the jaguar (Panthera onca), while the jaguar controls the populations of turtles by preying upon them. Therefore, this is a predator-prey relation.
Answer:
prey-predator
Drag the tiles to the boxes to form correct pairs. Not all tiles will be used.
Match each type of skeletal marking to its function
allows tendons to attach to bone
allows blood vessels and nerves
to travel through bone
allows two bones to form a joint
allows smooth gliding of joints
allows for the production of
red blood cells
foramen
tubercle
fossa
Answer:
Foramen: Allow blood vessels and nerves to travel through bones
Tubercle: Allows tendons to attach to bone
Fossa: Allows two bones to form a joint
A red blood cell is placed in a solution. After a period of time, the cell has shrunk to half its original size. What is true
Answer: The red blood cell which is placed in a solution will shrink because of lower water concentration compared to their water contents, the blood cell will lose water by osmosis which causes water to leave the cell.
After a period of time, when red blood cell is placed in a hypertonic solution, the cell has shrunk to half its original size is true
What is hypertonic solution?Hypertonic solution refers to a solution that have a very high osmotic pressure than other solution. hypertonic solution is one it had a greater concentration or number of solute particles outside a membrane and lower concentration inside the cell membrane.
This cause the cell to shrink.
Therefore, After a period of time, when red blood cell is placed in a hypertonic solution, the cell has shrunk to half its original size is true.
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Which technology is used to service space vehicles and other equipment?
space probe
space station
space satellite
space observatory
Save and Exit
The correct answer here would be A: Space Station
Hope this helped!!!
5. Viruses such as avian (bird) flu and swine flu that mutate
spread from animals to human populations are known as what?
O A. Zoonoses
O B. Vectors
O C. Epidemics
OD. Transmuting viruses
Answer:
Zoonoses.
Explanation:
Zoonoses may be defined as any infection or diseases that can be transferred between animals and humans. Bacteria, virus, fungal and protozoan disease can be easily transferred from humans to animals or vice-versa.
Avian bird flu and swine flu that are mutated can be easily spread from animals to the human population. Direct or indirect contact can transfer these diseases in the humans. Hence, these are consider as zoonoses.
Thus, the correct answer is option (A).
Which is more stable RNA or DNA?
Answer: RNA
Explanation: because in DNA, it results with viruses, and RNA is better I guess
The levels of water and salt in the blood are controlled by what
Answer:
Kidneys
Explanation:
These organs excrete excess water and salts in the blood and also conserves them when they are in low concentrations. The rate of reabsorption is controlled by ADH (Anti-diuretic hormone/vasopressin) and ACTH (that triggers the release of aldosterone by adrenal glands) that are produced by the pituitary gland.
HELP PLEASE ASAP!!!!!!
Demonte is working with other people in his neighborhood on a community project focused on improving natural ecosystems in their town. He decided to consult a ________ specialist for advice on how to go about it.
Answer: ... restoration... (specialist)
Explanation:
correct answer in plato
An ecologist would be the appropriate specialist to consult for advice on improving natural ecosystems in a community project.
Explanation:A student working on a community project focused on improving natural ecosystems would consult an ecologist for advice on how to go about it. Ecologists study the relationships between organisms and their environment, helping to understand the impact of human activities on ecosystems and providing guidance for conservation efforts. They work at various levels, including organism, population, community, and ecosystems to collect data and develop management strategies that promote sustainability.
DNA Replication Assignment
Instructions: For this assignment, you will replicate DNA to make a complimentary strand of DNA. Then transcribe the complimentary DNA sequence into mRNA. Next, translate the mRNA molecule into the codes for specific amino acids using the amino acid chart on the last page. Lastly, address the reflection questions.
DNA Replication:
Replicate the following strand of DNA:
Original DNA A T G A A C C A T T C A G T A T G G
Complimentary DNA
Transcription:
Transcribe the DNA to make an mRNA molecule
Complimentary DNA
mRNA Molecule
Translation:
Translate the mRNA into the corresponding amino acids.
mRNA Molecule
Amino Acid
Can anyone help with this? I don't understand it.
Using the DNA sequence provided, determine the amino acids.
Original DNA A T G G G T C T A G C G A A A G A T
Complimentary DNA
mRNA Molecule
Amino Acid
Answer:
The correct answer will be:
Case I:
Original DNA: ATG AAC CAT TCA GTA TGG
Complimentary DNA: TAC TTG GCA AGT CAT ACC
Transcript mRNA molecule: AUG AAC CGU UCA GUA UGG
Translated sequence: Met- Asn - Arg - Ser - Val- Trp
Case II:
Original DNA: ATG GGT CTA GCG AAA GAT
Complimentary DNA: TAC CCA GAT CGC TTT CTA
Transcript mRNA molecule: AUG GGU CUA GCG AAA GAU
Translated sequence: Met -Gly- Leu- Ala- Lys - Asp
Explanation:
DNA replication is a process which produces a replica or exact copy of the DNA molecule by using one strand of the existing DNA as a template. The new strand is formed using Chargaff rule which states that purine binds pyrimidine that is adenine(A) will bind to thymine (T) and guanine (G) will bind to cytosine (C).
Transcription is a process which produces an mRNA molecule from one strand of DNA molecule. The mRNA acts as a messenger molecule which is formed with the same Chargaff rule except for a different nitrogenous base "uracil". In mRNA uracil (U) will bind complementarily to adenine (A) instead of thymine.
The translation is a process which synthesizes the protein by reading the bases of mRNA in the triplets called 'codons". These codons code for a specific amino acid which bond to each other via peptide bond and form protein.
Adenine binds to the thymine by a double hydrogen bond and guanine binds to the cytosine by a triple hydrogen bond. But in RNA Adenine binds to the uracil.
DNA is made of:-
Ribose sugarPhosphate groupNitrogenous baseIn case I -
Original DNA: ATG AAC CAT TCA GTA TGG
Complimentary DNA: TAC TTG GCA AGT CAT ACC
Transcript mRNA molecule: AUG AAC CGU UCA GUA UGG
Translated sequence: Met- Asn - Arg - Ser - Val- Trp
In case II
Original DNA: ATG GGT CTA GCG AAA GAT
Complimentary DNA: TAC CCA GAT CGC TTT CTA
Transcript mRNA molecule: AUG GGU CUA GCG AAA GAU
Translated sequence: Met -Gly- Leu- Ala- Lys - Asp
The copying of one strand of DNA into RNA is called transcription. All the information for amino acids is stored in RNA. The formation of the protein molecule from RNA by coding the amino acid is called translation.
Therefore, the formation of new DNA from the previous DNA is called replication.
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What would happen to the size of the lion population if elephants usually won this competition
The lion population would decrease if elephants usually won competitions due to their impact on food availability and ecosystem dynamics, showcasing the interconnectedness of species within an ecosystem.
The lion population would likely decrease if elephants usually won competitions due to the impact on food availability and ecosystem dynamics. In the Addo Elephant National Park, the introduction of lions resulted in a significant predation on African buffalo, affecting the population demographics and behavior.This situation exemplifies how changes in predator-prey dynamics can influence wildlife populations, highlighting the interconnectedness of species within an ecosystem.The decline in African elephant populations due to factors like habitat loss and poaching further underlines the importance of considering various factors in wildlife conservation efforts.
Which of the following is NOT a reason energy decreases at each trophic level?
options:
Only a certain amount of food is eaten by a consumer.
Some food is used as an energy source.
Some food can't be digested and exits as waste.
none of the above
Answer:
none of the above
Explanation:
makes sense
What is the process of succession?
O
A. When a community is replaced by another community
B. When a species changes from one niche to another niche
O
C. When one disturbance replaces another disturbance
O D. When an ecosystem changes from one biome to another biome
Answer:
It is A
Explanation:
When a community is replaced by another community. Therefore, option (A) is correct.
What is Succession?Succession is the process by which a community of organisms changes over time. It occurs when one community is replaced by another community through a series of stages.
Primary succession occurs in an area where there is no existing community, such as on bare rock or after a volcanic eruption. Pioneer species, such as lichens, begin to colonize the area and over time, larger plants and animals move in, leading to the development of a mature community.
Secondary succession occurs in an area where there is an existing community that has been disturbed, such as by a forest fire or clear-cutting. The community may be partially or completely destroyed, and the process of succession begins again.
In both cases, the process of succession involves a series of stages in which different species replace one another and the community becomes more complex and diverse over time.
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why are mustard seeds and groundnut called oil seeds
Answer:
(i) Groundnut and mustard seeds are called oilseeds because they are used to extract edible oil which are used for cooking food.
(ii) Herbivores consume only plants and plant products whereas carnivores feed on other animals only.
Explanation:
Mustard seeds and groundnut are called oil seeds because they contain a high amount of oil content in them. The oil is extracted from these seeds and used for different purposes.
Explanation:Mustard seeds and groundnut are called oil seeds because they contain a high amount of oil content in them. The oil is extracted from these seeds and used for different purposes.
For example, mustard seeds contain about 30-35% oil content. These seeds are crushed and pressed to extract the oil, which is commonly used for cooking and as a condiment.
Similarly, groundnuts, also known as peanuts, have a high oil content of around 40-50%. The oil extracted from groundnuts is widely used for cooking, in the production of margarine, and as an ingredient in various food products.
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Jason has five equally massed lead fishing weights, each weighing 250 grams. What is the total mass of the five lead fishing weights?
Answer:
1250 g=1.25 Kg
Explanation:
We are given that Jason has five fishes of equally massed lead fish weights.
Weigh of each fish =250 grams
We have to find the value of total mass of the five lead fishing weights
Total number of fishes=5
In order to find the total mass we will use unitary method
Total mass is obtained by multiplying the total number of fishes with weight of one fish
Total mass=[tex]5\times 250[/tex]
Total mass of five fishes=1250 g
1 kg =1000g
Then 1250 g=[tex]\frac{1250}{1000}=1.25 Kg[/tex]
Hence, total mass of five lead fishing weights=1250 g=1.25 Kg
Answer:1.25kg
Explanation:
I got it correct
This is my question hope you could help someone in the future because I don’t have time to wait :)
Answer:
I think it would be ray 4. Hope this helps!
How do cellular respiration and photosynthesis provide energy for an organism to function?
Answer:
They provide energy because photosynthesis makes sugar (glucose) which results into ATP(energy). In CR (cellular resp), oxygen is broken down during the process of photosynthesis and is used in CR to make water with hydrogen bonds.
Photosynthesis and cellular respiration work together to transfer energy from the sun to organisms. Photosynthesis captures solar energy to produce glucose, which cellular respiration converts into ATP, the usable energy for cells. This cyclical relationship powers life functions and maintains atmospheric balance.
Both photosynthesis and cellular respiration are fundamental processes that provide energy for organisms. Photosynthesis is the process by which certain organisms, such as plants, algae, and some bacteria, convert solar energy into chemical energy stored in glucose. This energy enters ecosystems and is transferred from one organism to another, fueling the cycle of life. Cellular respiration is a metabolic pathway where organisms use oxygen and the glucose produced by photosynthesis to create ATP, which is the energy currency in cells. This process releases carbon dioxide and water as byproducts and is essential for powering life functions.
Through photosynthesis, light energy is captured and converted into chemical energy within the bonds of glucose molecules. Animals and other organisms consume these glucose-rich plants, and through cellular respiration, they break down the glucose to release the stored energy, using it to perform vital activities. This interrelationship between photosynthesis and cellular respiration maintains the balance of oxygen and carbon dioxide in the atmosphere, making it a cyclical process that is crucial for sustaining life on Earth.
4. Is the coloring of the peppered moths an example of competition, differential reproductive success, or inherited variation? Explain why
Answer: inherited variation
Explanation:
Because the coloring of the moths were a genetic mutation that helped strengthen the endurance and versatility of the moths by blending in with better environments
Answer:
Competition
Explanation:
Peppered moths get their color in lieu to become the fittest among all so that they can survive easily.
During industrial age, when pollution suddenly became high these moths changed their color through evolution in order to save themselves from their predators.
This is an example of competition with other species and becoming able to survive among all.
Which type of scientific statement is defined as a statement of fact that is generally accepted to be true and universal becau
it has always been observed to be true?
O theory
O probability
O law
Answer:
Scientific Law
Explanation:
Scientific Law is a statement or fact meant to explain, in concise terms, an action or set of instructions. It is generally accepted to be true and universal, and can sometimes be expressed in terms of a mathematical equasion. Scientific laws are similar to mathematical postulates.
Which three structures are found in both prokaryotic and eukaryotic cells?
A plasma membrane, ribosomes, cytoplasm, and DNA. Hope this helped. Please make sure to make me brainliest answer ✨
Answer: Cytoplasm, cell membrane, ribosomes.
Explanation:
Eukaryotic cells contain a nucleus within a membrane and other membrane-bound organelles, such as mitochondria and chloroplasts. While, prokaryotic cells don't. Thereby, the only structures found in both cells are:
Cytoplasm: semifluid substance within a cell, where organelles are found.Cell membrane: a membrane that separates the interior of all cells from the outside, and which regulates the transport of substances.Ribosomes: Organelle that serves as the site of protein synthesisBut, both type of cells contain genetic material but in prokaryotic cells it is naked and found freely in the cytoplasm (within a region called the nucleoid) . And in eukaryotic cells it is found inside the nucleus, bonded to proteins called histones.
A travel-time graph can be used to find the ____.
O distance to the epicenter of an earthquake
O distance to the focus of an earthquake
O strength of an earthquake
O damage caused by an earthquake
Answer:
Distance to the epicenter of an earthquake
Explanation:
answer for gradpoint
Overfishing caused cod to nearly go extinct in the late 20th century. Which
action allowed some cod populations to rebound?
O
A. Banning the sale of cod
B. Introducing a nonnative species of cod
O
C. Removing restrictions on cod fishing
O
D. Placing limits on cod fishing
SUBMIT
Answer:
D.placing limits on cod fishing SUBMIT
Explanation:
How is an increase in carbon in the atmosphere likely to affect coastal areas such as those in North Carolina?
A. It is likely to cause a decrease in flooding.
B. It is likely to cause an increase in plant growth.
C. It is likely to cause a decrease in pollution.
D. It is likely to cause an increase in erosion.
Answer:
D. It is likely to cause an increase in erosion.
Explanation:
An increase in carbon in the atmosphere is most likely to cause coastal erosion. Coastal erosion is the washing away of the shore as result of waves and storms breaking into them.
When the level of atmospheric carbon increases, more radiation is trapped within earth and this leads to the phenomenon of global warming. As the earth warms, polar ice melts and ocean level rises. More water in the ocean would lead to flooding and generation of disturbances in the ocean. This high volume of water would easily wear and wash away the shores.
Answer:
Option (D)
Explanation:
The amount of Carbon dioxide (CO₂) that is trapped in the atmosphere is released by the burning of the fossil fuels and from the industrial pollution. In addition to this, some amount of it also released by the animals and human beings. This stored CO₂ in the atmosphere is then transported to the oceans with the help of rainfall. When this CO₂ reacts with water it forms weaker acid, which is commonly known as the Carbonic acid. Due to this, the pH level of ocean water decreases. As a result of this, it affects the ocean water chemistry and the marine life.
Due to this ocean acidification, the marine species namely the corals and various types of planktons are not able to form the hard parts like the shell and skeletal parts. This carbonate water dissolves the existing shells and erodes the particles away.
The increase in the carbon content in the atmosphere will also lead to precipitation that will wash away the rock particles and other sediments, that are present in the coastal areas. In addition to this, the plants also will be affected due to this carbon containing water.
Hence, the correct answer is option (D).
How many molecules of oxygen are produced for every molecule of carbon dioxide that is consumed during photosynthesis
In general, six molecules of carbon dioxide are required to produce the same six molecules of oxygen in process of photosynthesis.
[tex]6CO_2 + 12H_2O[/tex] → [tex]C_2H_1_2O_6 + 6O_2 + 6H_2O[/tex]
What is Photosynthesis?Photosynthesis may be defined as a process through which green plants and some algae produce their own food (glucose) with the help of carbon dioxide and water in the presence of sunlight.
By simplifying the topmost statement, it can be assumed that one molecule of oxygen is produced for every molecule of carbon dioxide that is consumed during photosynthesis.
Therefore, it is well described above.
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The carbon-dioxide content in the Earth's atmosphere before 1500 A.D. was between 200 and 300 ppm. The carbon dioxide
content today is about 450 ppm. Which single historical development can be blamed for this increase?
Select one:
O a. the election of George Bush
o b. the Industrial Revolution
o c. splitting of the atom
O d. the invention of agriculture
Which of the following describes a solution that contains a buffer?
A. Sodium hydroxide, a base, is added to the solution, and the pH of
the solution becomes higher.
B. Distilled water is added to the solution, and the pH of the solution
does not change.
C. Acetic acid is added to the solution, and the pH of the solution
becomes lower
D. Citric acid is added to the solution, but the pH of the solution does
not change.
SUBMIT
Answer:
D
a buffer is an ionic compound that resists change in ph hence no ph change on addition of an acid proves the presence of a buffer which is different when distilled water is added because it is neutral hence no increase or decrease in ph
Answer:
Citric acid is added to the solution, but the pH of the solution does not change.
Explanation:
Which of these organelles is responsible for sorting proteins before they are
sent to the body of the organism?
A. Nucleus
B. Vacuole
C. Rough endoplasmic reticulum
D. Golgi apparatus
Answer:
D. Golgi apparatus is the correct answer.
Explanation:
Golgi apparatus is responsible for sorting proteins before they are
sent to the body of the organism.
The Golgi apparatus receives the proteins from the rough endoplasmic reticulum.
After receiving the Golgi apparatus modifies and then sort some of them and then the proteins are concentrated and packed into sealed droplets termed as vesicles.
Someone with A antigens will not have
antibodies.
The statement Someone with A antigens will not have antibodies is incorrect. In the ABO blood group system, individuals with type A blood have A antigens on the surface of their red blood cells, and they can have antibodies in their plasma. Specifically, they will have anti-B antibodies, which are capable of attacking and destroying red blood cells that carry B antigens. This is because the immune system of a person with type A blood is naturally sensitized to recognize the B antigen as foreign.
To clarify, here is the typical antibody and antigen profile for the ABO blood group system:
- Type A blood: A antigens on red blood cells, anti-B antibodies in plasma.
- Type B blood: B antigens on red blood cells, anti-A antibodies in plasma.
- Type AB blood: A and B antigens on red blood cells, no anti-A or anti-B antibodies in plasma.
- Type O blood: No A or B antigens on red blood cells, both anti-A and anti-B antibodies in plasma.
Therefore, a person with type A blood will have A antigens but will also have anti-B antibodies, not anti-A antibodies. This is crucial for blood transfusions, as a person with type A blood can receive type A or type O blood, but not type B or type AB blood, because the anti-B antibodies in their plasma would react against the B antigens on the donor red blood cells.
The role of rRNA in gene expression is to
A. initiate DNA replication.
B. silence genes that shouldn't be expressed.
C. form part of the ribosome.
D. base pair with DNA strands.
Answer:
C
Explanation:
Ribosomes consist of two major components: the small ribosomal subunits, which read the RNA, and the large subunits, which join amino acids to form a polypeptide chain. Each subunit consists of one or more ribosomal RNA (rRNA) molecules and a variety of ribosomal proteins (r-protein or rProtein).
Form part of the ribosome.
What is the role of rRNA in genes?Ribosomal RNA (rRNA) is part of the ribosome, or protein builders, of the cell. Ribosomes are accountable for translation, or the method our cells use to make proteins. rRNA is responsible for studying the order of amino acids and linking amino acids together. They do that thru a particularly complicated sequence.
Why is rRNA so critical?The 16S rRNA gene encodes the small subunit ribosomal RNA molecules of ribosomes, accountable for the crucial technique of converting genetic messages to useful cell components via the interpretation of mRNA to proteins.
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