Jason adds the antibiotic penicillin to a bacterial culture. The bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. What caused this genetic modification?
mutations to the DNA sequence
normal gene regulation
operon gene induction
RNA interference
Answer:
The correct answer is- mutation to the DNA sequence
Explanation:
A change in the DNA sequence by base-pair addition, deletion or substitution or by any other way bring mutation in the DNA. In bacteria, random mutation occurs in their DNA sequence which can change the codon sequence and results in coding for some enzymes or protein that deplete the effect of antibiotics on them which provide antibiotic resistance to the them.
So by doing mutation in their DNA sequence bacteria can gain antibiotic resistance or the bacteria which already have the appropriate mutation in their DNA will be selected by natural selection and other bacteria will die due to antibiotic effect.
Therefore genetic modification is caused by mutation in the genetic sequence.
What will happen to a red blood cell (rbc), which has an internal ion content of about 0.9%, if it is placed into a beaker of pure water?
Final answer:
A red blood cell placed in pure water, which is a hypotonic solution, will undergo hemolysis due to water rushing in via osmosis, causing the cell to swell and potentially burst.
Explanation:
If a red blood cell (RBC), with an internal ion content of about 0.9%, is placed into a beaker of pure water, the environment around the cell is considered hypotonic. Due to the higher concentration of solutes inside the RBC compared to the pure water, water will rush into the cell, a process driven by osmosis. With a fixed surface area, the RBC membrane can only stretch so much before the RBC will swell and undergo hemolysis, which is when the cells swell up with water and eventually burst.
Most cells have mechanisms in place to prevent excessive water intake, but red blood cells lack these regulatory systems, making them ideal for osmolarity studies. In a hypertonic solution, water would leave the RBC, causing it to shrink or crenate. However, in an isotonic solution, the RBC would retain its normal shape, with equal water movement into and out of the cell. This dynamic is essential for maintaining cellular function and integrity in different environments.
Jadelle and implanon are implantable contraceptives inserted in the fatty tissue of the upper arm and provide birth control for
Answer:
What contraceptive implant is inserted under the skin of the arm?
The contraceptive implant (Nexplanon) is a small flexible plastic rod that's placed under the skin in your upper arm by a doctor or nurse. It releases the hormone progestogen into your bloodstream to prevent pregnancy and lasts for 3 years
Explanation:
Which term describes the study of the functions of the structures of the body??
What is moving a limb away from the midline of the body along the frontal plane called?
Abduction is the act of moving a limb away from the midline of the body along the frontal plane. This can be as simple as raising the arm or spreading fingers apart. The opposite movement, bringing the limb towards the body, is called adduction.
Explanation:The action of moving a limb away from the midline of the body along the frontal plane is called abduction. These motions occur within the coronal plane and involve medial-lateral movements. For example, when you raise your arm at the shoulder joint, moving it laterally away from the body, it is considered as abduction. Similarly, spreading the fingers or toes apart is also an example of abduction. Conversely, adduction is the movement that brings the limb towards the body or across the midline. The movements of abduction and adduction take place at joints like the shoulder, hip, wrist, metacarpophalangeal, and metatarsophalangeal.
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Which of the qualities listed below are necessary for true appreciation?
A. recognition of value
B. extreme love
C. knowledge
D. thoughtful observation/experience
Answer: The correct answer is- A) Recognition of value.
Appreciation can be described as a feeling or expression of gratitude or admiration, that is done for any individual who performs an extraordinary task or achieve something great.
Therefore, true appreciation involves the recognition of the value ( that is worth).
Disaccharides are best defined as what?
A)Molecules added to soft drinks and other foods that are not found in nature.
B)Carbohydrates made by combining two smaller monosaccharides, such as glucose + fructose.
C)Carbohydrates made by combining many smaller sugars, such as starch.
D)Proteins made by combining many amino acids in a chain.
Cyclones are formed due to
mist and snow
clouds and fog
warming of oceans
underwater earthquakes
Answer:
Correct answer is warming of oceans
Explanation:
when hot moist air flows at the upper surface of the ocean it tries to move in upward direction due to which less amount of air is left at the surface of ocean and hence a lower air pressure is created in this area.
surrounding air which is at higher air pressure try to push the low pressure air which rises the temperature of low pressure air and again this air moves upward leaving behind less air at the surface of the ocean.
when this high temperature and moist air moves in the upward direction it temperature decreases due to which clouds are formed . This combination of clouds and wind continuously grows and started spinning. When this combination of wind and clouds spin fast, that time an eye is formed at the center. At this center very low air pressure is there and air with high pressure flows down into this center.
In this way cyclones are formed.
An archipelago is a large group of islands. question 1 options:
a. True
b. False
Answer:
The statement is true
Explanation:
A large group of islands which are scattered closely in the body of water is called archipelago. The water body is usually oceans but it can be river and lakes. Volcano eruption is one of the main causes of making most of the island in an archipelago and these islands are called oceanic islands.
One of the example of archipelago is Finland’s Archipelago Sea which has more than 50,000 islands although many of them are so small that they do not measure even one acre. Therefore the statement is true.
How are "gamete," "chromosomes," and "zygote" related?
During prenatal development, the organism depends on the ________ to exchange food and waste products with the mother's blood stream.
Why does rattlesnake bite cause blood to appear in the urine?
Mass of 66 kg on earth what would the weight be on the moon
A local farmer began to follow a more sustainable practice. As a result, his levels of carbon emissions decreased by fifty percent. The soil quality will most likely
A) increase
B) decrease
C) stay the same
carbohydrates have chemical bonds that are a good source of energy for living things. A monosaccharide is a carbohydrate made by plants when energy from the sun combines water and carbon dioxide.
how are two other types of carbohydrates formed? give examples of each type
The other two types of carbohydrates are Disaccharides: when two monosaccharides are joined together. Polysaccharide: when more than two monosaccharides are joined together.
What is a carbohydrate?Carbohydrates are biomolecules made up of carbon, hydrogen, and oxygen. They are of three types, monosaccharides, disaccharides, and polysaccharides.
Disaccharides when formed release water, an example is a maltose. An example of a polysaccharide is glycogen.
Thus, the two additional forms of carbohydrate are Disaccharides are constituted when two monosaccharides are combined. When more than two monosaccharides are combined, the result is a polysaccharide.
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The process by which an organism learns to produce a specific response in order to avoid or obtain an outcome is:
What population group has the highest risk for vitamin k deficiency?
What do chloroplasts look like under a microscope?
I depends, though “small greenish blob” would be a good description. The other answers contain great pictures of plant chloroplasts under a decent quality light microscope. However, plants (and algae) don’t all have the same size of chloroplasts and the chloroplasts can be very hard to see when they are small, not just because of size, be also because they appear less green (small size = less light absorption = less green in color).
If you use fluorescence microscopy, then the chloroplasts glow reddish-orange in color (very cool, especially when you have swimming algae).
Hope I helped
What is the function of the bulbospongiosus muscle in both male and female?
After the big bang, atoms in gas clouds experienced a greater gravitational pull to each other than atoms in other regions of the universe. Which two statements are scientific facts that explain this phenomenon?
a. Gravitational pull on an object decreases with a decrease in its temperature.
b. As the density of an object increases, it becomes immune to gravitational force.
c. Gravitation between two objects increases when the distance between them decreases.
d. Gravity doesn’t exist between objects that are less than one light-year apart.
e. When the mass of an object increases, its gravitational pull also increases.
Answer:
Gravitation between two objects increases when the distance between them decreases.
When the mass of an object increases, its gravitational pull also increases.
Explanation: plato
basically c. and e. (in the og platform there's no lettered options, it's check boxes...)
Matt suffered slight burns in an accident. When the skin burns, it loses some of its functions. First-degree burns affect the top layer of skin. What effect will first-degree burns most likely have on the upper layer of the skin?
Answer:
for plato users it is C
Explanation:
(a) compare interstitial and vacancy atomic mechanisms for diffusion. (b) cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion.
Interstitial and vacancy are two different diffusion mechanisms, with the former being typically faster due to the lighter mass of the diffusing species and the greater availability of interstitial sites for movement.
Explanation:(a) When comparing interstitial and vacancy diffusion mechanisms, the primary difference is in how atoms or molecules move from one location to another within a material. Interstitial diffusion occurs when the diffusing atoms or molecules move through the empty interstices in the crystal lattice. Conversely, vacancy diffusion requires a vacant lattice site or 'hole' to be near an atom; the atom can then jump into this void, leaving behind a new vacancy.
(b) There are two main reasons why interstitial diffusion is normally more rapid than vacancy diffusion. First, the mass of the diffusing species in interstitial diffusion tend to be lighter, allowing them to move faster. Second, interstitial sites are typically more available and require less activation energy to move into, compared to the energy required for an atom to leave its place and form a vacancy.
describe the positive and negative interactions that affect populations in the tundra ecosystem?
answer for e2020:Animals have adapted to the harsh weather conditions and long winters of the tundra.
Animals migrate to eat insects that live there year round.
Many animals in the tundra hibernate during the long, cold winter months.
Animals are most active in the short summer as the snow melts and shallow wetlands form.
What kind of fossil would a gastropod shell must likely be?
Carbon films
Gastroliths
Coprolites
Molds
Answer:
Carbon films
Explanation:
The Gastropod class is the largest class of mollusks, including living and fossil species. The class has fossil records since the beginning of the Cambrian period, and are considered the most successful class of mollusks in terms of evolution in the environment, as they have conquered the marine, freshwater, and pulmonary snails and several other groups, the medium. terrestrial, and they succeeded in converting the cavity of the robe into a lung.
A student wonders whether removing the nucleus from a cell would result in a new prokaryotic cell. Why would this procedure fail to produce a prokaryotic cell?
Answer:
Removing the nucleus from the cell would not make it prokaryote because there are more characteristics that makes a cell prokaryote.
A eukaryotic cell has nucleus as well as membrane bound organelles found in the cytoplasm.
Even if the student will remove nucleus from the cell, the membrane bound cell organelles will remain in the cell.
Hence, only removing the nucleus from the cell would not make it a new prokaryotic cell.
Using one or more complete sentences, State the difference between a fact and a theory
After having harvested a wild turkey, what is the best and safest way to carry it out of the woods?
In order to carry the harvested turkey out of the woods, the hunter is always recommended to keep the bird in the hunter orange bag or cover it under the camouflage hunting vest.
Further Explanation:
The hunting of the turkeys is a very popular hunting program in many states. It is also posed as a dangerous activity as many turkey hunters have accidentally been shot during the hunting programs. The prime cause of this is the inability of the hunters to identify their target prior to shooting. This is because while turkey hunting the hunters are dressed in camouflaged dresses in order to hide and not recognized by the turkey and also to attract them. But in a way, the hunters also attract the other hunters who can recognize these hunters as the turkeys. Therefore, it is always suggested to never wear blue, black or white-colored vests as these colors match the feather of the turkeys.
Once a turkey is harvested, a hunter should be very careful while carrying it out of the woods. The bird must be concealed in an orange bag or hid under the camouflaged vest. The wings of the birds should not be hanging and the head must be covered entirely so as to not be displayed as a live bird by other hunters. The blaze orange garment is supposed to be worn by the hunters while traveling between the hunting sites in order to be identified by other hunters.
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Answer Details:
Grade: High School
Subject: Biology
Chapter: Hunting and Safety
Keywords:
Turkey, turkey hunting, hunters, camouflage, blaze orange garment or bag, hunting vest, safety.
The best and safest way to carry a harvested wild turkey out of the woods involves field dressing, using a hunting vest or backpack, and avoiding dragging the turkey.
The best and safest way to carry a wild turkey out of the woods is by following these steps:
Field dress the turkey by removing its entrails to make it lighter to carry.
Use a hunting vest or backpack to transport the turkey securely and keep your hands free.
Avoid dragging the turkey on the ground to prevent contamination or damage to the meat.
Germ cells are haploid but gametes are diploid.
a. True
b. False
While gametes are diploid, germ-line cells are haploid. In prophase, I, independent assortment takes place. Homologous chromosomes' non-sister chromatids. Two chromatids, one on each of two homologous chromosomes.
What results in formation of diploid gamete?A germ cell splits into two portions during meiosis (reduced division), which leads to the formation of four gametes.
A diploid (i.e., containing coupled chromosomes) zygote is created during fertilization by uniting the male and female gametes.
Mitosis makes diploid offspring cells that are indistinguishable to the parent cell. Meiosis I is where the majority of the variations between mitosis and meiosis occur.
The homologous chromosomal pairs connect and are bonded together by the synaptonemal complex during meiosis I.
Therefore, it is true that Germ cells are haploid, but gametes are diploid.
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Where your extra fat is deposited is determined primarily by your genetic makeup?
What parts of a nucleotide make up the backbone of a nucleic acid?
Answer:
The correct answer would sugar and phosphate.
The nucleotide consists of three units; sugar (ribose in RNA and deoxyribose in DNA), a phosphate group, and a nitrogenous base (adenine, guanine, cytosine, thymine, or uracil).
The sugar group of one nucleotide is attached to sugar of another nucleotide with the help of phosphodiester bond.
Thus, alternate sugar and phosphate groups form the backbone of nucleic acid from which nitrogenous bases stick out.