Answer:
un radical es un átomo, molécula o ión que tiene un electrón de valencia no apareado. Con algunas excepciones, estos electrones desapareados hacen que los radicales sean altamente reactivos químicamente.
Explanation:
A(n) ___ lens has a center that is thicker than its edge.
Answer:
convexHope this helps
How much eroded sediment is carried to the oceans of the world each year.
25 million pounds
100 million pounds
25 billion tons
Answer:
25 billon
Explanation:
doing same thing.
Answer:
C
Explanation:
Which of the following processes allows the cells of an
organism to use carbon from the environment?
A mitosis
B fertilization
C transpiration
D photosynthesis
Which of the following is not found in the plasma membrane
Answer:
E
Explanation:
Hope this helps
3. What basic concept of biology includes the idea
that new cells can be produced only by the divi
sion of existing cells?
Answer:
It would be the cell theory
Cell theory is the basic concept of biology includes the idea that new cells can be produced only by the division of existing cells.
What is cell theory?In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
A component of the cell theory is that all living things are composed of one or more cells. A component of the cell theory is that the cell is the basic unit of life. A component of the cell theory is that all new cells arise from existing cells.
All known living things are made up of cells. The cell is structural & functional unit of all living things. All cells come from pre-existing cells by division. (Spontaneous Generation does not occur).
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1. Why are viruses considered nonliving but bacteria are considered living? Give two reasons. (1 point)
Answer:
-Viruses cannot replicate.
-Viruses do not need to consume energy to survive or regulate its own temperature.
Explanation:
<3
Viruses are not able to replicate or carry out any of the functions of living cells on their own. They rely on the machinery of the host cell in order to replicate and produce new viruses, and they are not able to carry out functions such as metabolism, growth, or reproduction on their own.
Why viruses are considered non-living?Viruses are much simpler in structure than bacteria and other living cells. They do not have a true cell structure or any of the characteristic cell organelles found in living cells, such as a nucleus, mitochondria, or endoplasmic reticulum. Instead, they are composed of a small piece of genetic material (either DNA or RNA) surrounded by a protein coat.Learn more about viruses, here:
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Which of the following best describes the formation of the bond shown in Figure 1 ?
А
An ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom of the other amino acid,
B
An ionic bond is formed when the negative charge of an OH group is balanced by the positive charge of a hydrogen ion.
с
A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O
D
A covalent bond is formed that replaces the hydrogen bond between the OH group and the H atom,
A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O.
HOW PEPTIDE BOND FORMS:
Peptide bond is a bond that forms when two amino acids comes together. It involves the fusion of the amino group of one amino acid (NH2) and carboxyl group of another (COOH) with the release of water (H2O). Peptide bond is a type of covalent bond because it involves sharing of electrons between a carbon atom (C) and a nitrogen atom (N).Therefore, in the reaction shown in the image attached, a covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O.
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In this section write a short paragraph about photosynthesis using the following words in a meaningful way ; Photosynthesis, water, roots, glucose, leaves, sunlight, carbon dioxide, stomata
Answer:
Photosythesis is the process of which plants make oxygen and also gulcose. This process happens when the plants uses their roots to taken in water in the ground and also anchor themselves in the ground. The stomata in the leaves take in carbon dioxide and the sunlight and using theses materials the plants create glucose and oxygen we breath.
How do biological systems respond when acids or bases are added?
Biological systems do not experience any changes in pH.
Biological systems do not experience any changes in pH.
Cells produce different molecules that can function at the new pH levels.
Cells produce different molecules that can function at the new pH levels.
Most biological molecules can function at any pH value.
Most biological molecules can function at any pH value.
They have substances that counteract acids or bases to prevent the pH from changing.
Answer:
The correct answer is - They have substances that counteract acids or bases to prevent the pH from changing.
Explanation:
Including human, all the organism depends on the water so therefore known as waster system based which suggests that they depend on the acid-base liquid equilibrium to maintain its cellular functions and homeostasis.
Acid and bases are influences and determine the pH value of the chemistry of biological systems as every cycle is affected by the pH fluctuation so the maintenance of pH is very critical.
so as to keep biological system compound and in the equilibria of protonation, they have certain substances in each cycle or part that counteract the acid and base to maintain pH.
for instance:
phosphate ion maintains the Cytoplasm pH
the bicarbonate ion regulates the Blood pH
1. The (incorrect) belief that life is produced by a mysterious spirit or force is called: a. spiritualism b. recidivism C. vitalism d. hoodoo-voodooism
Answer:
it has the word spirit in it. Spiritualism
What 4 things do both eukaryotic and prokaryotes cells contain?
Answer:
Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment.
Explanation:
The similarities between the eukaryotic and prokaryotic cells are:
Cell membraneRibosomesDeoxyribonucleic acid (DNA)Cell wallEukaryotic cells are those cells that contains organelles that are membrane-bound. These cells are found in plants, animals, fungi, and protists.
Prokaryotic cells are those cells that does not contain membrane-bound organelles. The cell structure is simple with no definite nucleus.
There are four components that can be found in both the eukaryotic and prokaryotic cells. They include:
Cell membrane: This is a semi-peameable membrane that surrounds the cell.Ribosomes: They are structures that are specialized for protein synthesis.Deoxyribonucleic acid (DNA): This is a hereditary material.Cell wall: This contains cellulose that helps protect the cell.Learn more here:
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14)The lower jaw articulates with the temporal bone at the ?
Answer:
Entre ambas se encuentra la escotadura sigmoides. El cóndilo en estado fresco se encuentra recubierto por fibrocartílago y se articula con la fosa mandibular (o cavidad glenoidea) del hueso temporal, constituyendo la articulación temporomandibular o ATM, situada por delante del conducto auditivo externo.
Explanation:
II. Write a position statement on whether you think athletes like Santhi should be allowed to compete. Use evidence based reasoning in your position.
Answer:
The correct answer is stated in the Explanation section.
Explanation:
Santhi Soundarajan is an Indian track and field athlete that have won multiple international medals. Santhi was the center of a controversy when she was striped her silver medal after failing a sex verification test at the 2006 Asian Games. Santhi has a condition known as androgen insensitivity syndrome, she carries a Y chromosome althoug she has female genitalia. I think is not fair to disqualify an athlete like Santhi unless it is determined that she committed fraud and that she has an evident advantage. If Santhi knew her condition and it is established that she has an advantage after multiple tests, then her medal could be removed.
Solve this question?
Answer:
Tissue level
Explanation:
Which of the following is NOT one of the three cellular structures? Cell (plasma) membrane Cytoplasm Cytokinesis Organelles
Answer:
cytokinesis is your answer
True or False. If gametes were produced in the same way as daughter cells in mitosis, there would be a doubling of the chromosome number at fertilisation.
Answer:
true im pretty sure
Explanation:
You are studying natural selection in a population of small marine invertebrates called isopods that live on pink corals. In this population, isopod body color is controlled by one gene with alternate alleles A and a. Isopods can be red (AA), pink (Aa), or white (aa); body size is controlled by another gene with alternate alleles B and b, and they can be large (BB or Bb) or small (bb). A new predator arrives on the reef that is extremely good at preying on isopods that are large and stand out against the corals on which they live (i.e., red or white individuals). Over time, which genetic individuals would you predict would become more abundant in the population with each subsequent generation?
Answer:
Aa, bb
Explanation:
Recall that this question calls our attention to the theory of evolution as postulated by Charles Darwin. Species that are well adapted to their environment are more likely to survive, reproduce and pass on these favourable characteristics to their offspring.
In this case, the coral reefs are pink and pink Isopod species with small bodies are likely to escape the predators. Hence the genetic combination Aa(pink body) and bb(small body) are more likely to survive and reproduce.
The organism shown is a free-living one that is anchored to the
bottom of ponds and streams during one stage of its life cycle.
What is the common name of the group to which this organism
belongs?
O cnidarians
O rotifers
O bryozoans
O mollusks
Answer:
Cnidarians
Explanation:
The organism describes sounds like a hydra, which is a genus of organisms that belongs to the phylum cnidaria. These organisms are tubular organisms with tentacles surrounding their mouths
PLEASE HELP FAST!!
CELLS: Describe the structure of a eukaryotic plant cell. Indicate the ways in
which a non-photosynthetic prokaryotic cell would differ in structure from this
generalized eukaryotic plant cell.
Answer:
A cell that is nonphotosynthetic, such as a prokaryotic bacterium, would not require chloroplasts to function.Explanation:
A broad sweeping eukaryotic plant cell accomplishes the basic functions required for plant care. It's a jumble of organelles held together structurally by the cell membrane, which is located outside of the cell wall.
What is eukaryotic cell?Plant and animal cells are eukaryotic, which means they contain nuclei. Plants, animals, fungi, and protists all have eukaryotic cells.
They typically have a nucleus organelle surrounded by a membrane called the nuclear envelope, which stores DNA.
Prokaryotes are typically simpler, requiring only a few organelles to survive. This is frequently because, as previously stated, it requires less energy.
It has DNA to contain genetic material, ribosomes to make proteins, a cell membrane, and a cell wall to protect the cell from its surroundings. While other components are produced by prokaryotes, the ones listed above are those that may be found in plant cells.
Aside from that, the non-photosynthetic prokaryotic cell requires much less energy, resulting in a cell that is much smaller and less complex than the generalized eukaryotic cell.
Thus, this way, a non-photosynthetic prokaryotic cell would differ in structure from this generalized eukaryotic plant cell.
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Which of the following elements is required for growth and development and is in our DNA? *
hydrogen
carbon
oxygen
nitrogen
phosphorus
There was a crisis situation . You have two patients , on have A blood . Both patients are in critical condition blood . You have one pint of A- blood and one pinto which patient and why ? (Hint : which patient is more antigen before or after the transfusion ? ) male and one female who each one needs one pint of would you give to have an exposure to Rh O blood more likely to have an
Answer:
Explanation below
Explanation:
There are different form or type of blood group. These include blood group A, B, AB and O.
The blood group AB is usually known as the universal recipient while the blood group O is the universal donor.
A universal donor can donate blood to all other blood groups, while the Universal recipient can receive blood from all other blood groups.
In this case, two patients, one with blood group A and the other with blood group AB, with only one available group A type pint for transfusion. The best thing to do in this case is to give the blood to group A patient and get any other blood group pint of blood for the group AB patient. This is because the blood group AB patient can receive blood from any of the blood groups.
A solar panel collects sunlight and converts it to
heat or electrical energy. How is a solar panel
similar to chloroplasts?
Answer:
chloroplasts use photosynthesis to make food from the sun to survive.
Explanation:
they use the sun's energy as a kind of "go-go juice"
]
In these chemical compounds, C is for carbon, O is for oxygen, N is for nitrogen, and K is for potassium.
Which chemical compound is most likely inorganic?
O H₂O
OCH1
Answer:
the firt one.
Explanation:
it lacks the thing that makes organic things.
What human body response help maintain homeostasis?
Answer:
The endocrine system plays an important role in homeostasis because hormones regulate the activity of body cells. The release of hormones into the blood is controlled by a stimulus. For example, the stimulus either causes an increase or a decrease in the amount of hormone secreted.
Explanation:
Answer:
If a raise in body temperature (stimulus) is detected (receptor), a signal will cause the brain to maintain homeostasis (response). Once the body temperature returns to normal, negative feedback will cause the response to end. This sequence of stimulus-receptor-signal-response is used throughout the body to maintain homeostasis.
Explanation:
What animal phylum do leeches belong in?
Answer:
What animal phylum do leeches belong in?
Explanation:
Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract.
Answer:
Annelida
Explanation:
"Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract."
Scientific name: Hirudinea
Phylum: Annelida
Kingdom: Animalia
Which of the following is an aspect of consciousness that is a key to self-control?
a. Countertransference
b. Selective attention
C. Centration
d. Cognitive dissonance
Answer:
a. countertransference
In what way are all living organisms on Earth Similar?
Answer:
They are all made from a code based on unsaturated fatty acids. They are all assembled from a nucleic acid code.
Explanation:
they reproduce to prevent extinction
they breathe
they move from one place to another
they carry out respiration to provide energy for daily activities
they feed
they react to changes in the environment
What's an invasive species?
A. A native species that begins to displace other local species
B. A species that invades an area because it has run out of space in the neighboring area
C. A species that's naturally expanding its range
D. A species that's introduced to a place where it's not native and then becomes widespread and competes with local species for the available resources
I believe the answer would be D
Place the following steps of endomembrane system function in the correct order.
1. Golgi apparatus receives transport vesicles from the RER.
2. Ribosomes on the RER synthesize proteins.
3. Proteins are packaged into transport vesicles.
4. Modified proteins may be secreted from the cell by exocytosis.
5. Proteins are modified by the Golgi apparatus.
A. 2, 4, 3, 1, 5
B. 3, 2, 1, 4, 5
C. 1, 2, 3, 5, 4
D. 2, 3, 1, 5, 4
Answer:
D
Explanation:
The correct option here would be D.
The endomembrane system refers to a group of membrane-based organelles whose primary function is to synergistically work together to modify, package, and transport lipids and proteins. The system includes organelles such as the lysosome, the nuclear envelope, the endoplasmic reticulum, and the Golgi apparatus.
For an endomembrane system function involving a protein, the protein would first of all need to be synthesized by the ribosome - the free ones or the ones attached to the rough endoplasmic reticulum. Thereafter, the synthesized protein would then be folded or packaged into transportable vesicles. The vesicles are then received by the Golgi apparatus which further modifies the proteins before transporting them accordingly.
Hence, the correct order of a typical endomembrane system function would be:
Ribosomes on the RER synthesize proteins.Proteins are packaged into transport vesicles.Golgi apparatus receives transport vesicles from the RER.Proteins are modified by the Golgi apparatus.Modified proteins may be secreted from the cell by exocytosis.Protein synthesis involves transcription and translation. Once the protein is synthesized, it suffers a few modifications in the RER and the Golgi complex, before leaving to its final destiny. The correct option is D. ⇒ 2, 3, 1, 5, 4
Protein synthesis and modificationTranscription ⇒ mRNA syntheisThe first step before protein synthesis begins is to synthesize messenger RNA, mRNA.
This is the coping process of the DNA section for the desired protein, and it happens in the nucleus.
Translation: Cytoplasm stageTranslation takes place when the formed mRNA moves to the cytoplasm through the nucleus membrane pores, and meets a ribosome.
Ribosomes are organelles composed by the association of proteins with rRNA and tRNA. They can be found in the rough endoplasmic reticulum or floating in the cytosol.
While the ribosome reads mRNA strain from its 5´ extreme to 3´, tRNA adds the correct amino acids to build the polypeptide.
Endoplasmic Reticulum StageSome proteins are destined for membrane or exportation. Their synthesis starts in the cytoplasm but finishes in the Rough endoplasmic reticulum.
When the ribosome and the growing molecule reach the RER, the synthesizing protein keeps enlarging forward the reticulum lumen.
When the new polypeptide synthesis is complete, it is released into the reticulum lumen.
The endoplasmic reticulum is in charge of protein folding, maturation, and transport, especially those destined for secretion. It produces the latest protein modifications after transduction and initiates the glycosylation process.
The new proteins get packaged into vesicles that carry them to the Golgi complex.
Golgi complex stageOnce the protein synthesis in the endoplasmic reticulum is over, these molecules are packaged into vesicles and sent to the Golgi complex.
In the Golgi complex, proteins suffer their final association with carbohydrates and lipids to originate glycoproteins and glycolipids.
Destiny stageGlycoproteins and glycolipids are packaged again into new vesicles that drive them to their final destiny.
Proteins destined for exportation are packaged and sent from the Golgi complex to the cell membrane into vesicles.
When the secretory vesicle reaches the target, its membrane fuses with the cell membrane, releasing its content to the extracellular space. This secreting process is known as exocytosis.
According to this resume about protein synthesis, we can say that the correct order is option D. ⇒ 2, 3, 1, 5, 4
2. Ribosomes on the RER synthesize proteins.
3. Proteins are packaged into transport vesicles.
1. Golgi apparatus receives transport vesicles from the RER.
5. Proteins are modified by the Golgi apparatus.
4. Modified proteins may be secreted from the cell by exocytosis.
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What two body parts must be cleaned before food preparation
Answer:
hand and arms
Explanation:
Wet hands with running water, (at least 1000F)
Apply soap.
Vigorously scrub lathered fingers, fingertips, and between fingers. And scrub hands & arms for at least 10-15 seconds.
Rinse under clean running water.
Dry clean hands/arms.
Hands and arms must be cleaned before food preparation. Thus option B is correct.
what is personal hygiene for food preparation ?Good personal hygiene can prevent food poisoning.
Bacteria that cause food poisoning can be found in anyone, even healthy people. If you touch your nose, mouth, hair or clothes before touching the food, you can transfer germs from yourself to the food.
Washing your hands well can reduce the risk of contaminating food with bacteria.
Wash your hands with warm water and soap, and don't forget the backs of your hands and wrists, between your fingers and under your nails.
Dry hands well immediately after washing. Always dry your hands with a clean towel or disposable paper or under a dryer.
Therefore, we must keep our hands and arms clean before food preparation. Thus, option B is correct.
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Your question is incomplete, but most probably full question was,
What two body parts must be cleaned before food preparation?
A. Hands and face
B. Hands and arms
C. Arms and face
D. Arms and ears
