Correct option is B. If the complex protein assemblage of the prokaryotic flagellum arose by the same general processes as those of the complex eyes of molluscs (such as squids and octopi), then ancestral versions of this protein assemblage were either less functional or had different functions than modern prokaryotic flagella.
How do prokaryotic and eukaryotic cells differ?On Earth, there are two different types of cells: prokaryotic cells and eukaryotic cells. The primary difference between the two is that eukaryotic cells have a distinct nucleus that houses the cell's genetic material, whereas prokaryotic cells lack a nucleus and have genetic material that is free to move about the cell.
According to Nature Education, the nuclear envelope of eukaryotic cells is made up of two lipid membranes and surrounds the nucleus of the cell (opens in new tab). DNA is stored in the nucleus of a eukaryotic cell. According to Washington University, prokaryotic cells lack a nucleus in favor of a membraneless nucleoid region, an open area of the cell that houses free-floating DNA.
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What kind of leaf is this
To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:
Answer:
needle
Explanation:
Asepsis refers to the absence of bacteria, viruses, and other microorganisms. When handling a syringe the user can handle all parts of the syringe except for the needle. As soon as the needle comes into contact with anything it can immediately come into contact with bacteria, viruses, and other microorganisms. Which can cause an infection in the individual on which the syringe is being used on.
which are the main stages of the cell cycle?
Answer:
The cell cycle is composed of interphase (G₁, S, and G₂ phases), followed by the mitotic phase (mitosis and cytokinesis), and G₀ phase.
Explanation:
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Why is the element carbon so versatile? A. Carbon is an extremely small element,
B. Carbon can change the number of electrons that it contains,
C. Carbon has the ability to form many different types of structures and is very stable,
Answer:
deffo C :)
Explanation:
you collect an aquatic organism with jointed appendages, a hard exoskeleton, and antennae. what other features would this organism have?
Other features possessed by this organism are the cephalothorax, a pair of compound eyes, a pair of antennae, a pair of mandibles, pereiopod, keliped, and pleopod.
Crustaceae is a group of anthropods that live in fresh water and sea water. But there are several groups of crustaceans that are able to adapt to life on land. Crustaceans live as carnivores and herbivores or parasites that have an exoskeleton in the form of hard body skin or cuticles. Examples of crustaceans are shrimp and crab.
The characteristics of crustaceans are as follows: The body of a crustacean consists of a cephalothorax or two parts, a fused thoracic head and abdomen or hind abdomen. On the head and thorax protected by the carapace, there are a pair of antennae, a pair of compound eyes, a pair of antennae and a pair of mandibles. The cephalothorax is protected by an exoskeleton. Crustaceans have four pairs of walking legs/pereiopods and one pair of capid or keliped legs. On each segment of the abdomen there are also pleopod pants or swimming legs.
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What is life please explain
Answer:
the existence of an individual human being like you and me and all of us life can also add up animals
a group of organisms that can interbreed and produce fertile offspring is called
Answer:
Species.
Explanation:
A species is often defined as a group of organisms that can reproduce naturally with one another and create fertile offspring.
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2. Describe the importance of oxygen, carbon dioxide, and ozone to living things.
Answer:
Animals needs oxygen's to survive and plants need carbon dioxide to survive. The ozone layer reflects harmful UV rays from the sun to protect the things living on Earth.
Answer:
oxygen is the source that makes human to live ozone is the home where we live and plant get carbondioxide which we enhale or throw feom our body
Explanation:
the oxygen is very essential for human beings .for example we get oxygen from a peepal tree and carbondioxide which plant get and the surrounding and earth where we live in earth
1. fatty acids2. amino acids3. phospholipids4. hydrogen5. peptide6. tertiary7. secondary8. rough endoplasmic reticulum9. ribosome10. Golgi apparatus11. vesicle
The production of antibodies inside the lymphocytes starts at the ribosome (organelle) by joining amino acids together, creating peptide bonds, and forming the primary level structure polypeptide. The polypeptide bends and folds tertiary in the Golgi apparatus (organelle), to form the next level of structure. For instance, the secondary level of structure is formed by hydrogen bonds to create alpha helix or beta-pleated formations.
In order for an antibody to be released into the blood, a fully formed antibody will move from rough endoplasmic reticulum (organelle) to another organelle named Golgi apparatus to sort and be processed for shipment out of the cell. Antibodies transport from organelle to organelle and to the plasma membrane in a vesicle, which is made out of fatty acids-phospholipids.
1. fatty acids
2. amino acids
3. phospholipids
4. hydrogen
5. peptide
6. tertiary
7. secondary
8. rough endoplasmic reticulum (organelle)
9. ribosome (organelle)
10. Golgi apparatus (organelle)
11. vesicle
Bacterial species with the ability to transform into endospores have the advantage of:A.) Reproducing faster than other bacterial species
B.) Having faster motility than other bacterial species
C.) Surviving unfavorable conditions better than other bacterial species
D.) Sharing plasmids with other bacterial species
E.) Being able to attach more firmly to slippery surfaces like teeth compared to other bacterial species
Option C is correct. The benefit of is that bacterial species that can change into endospores can survive unfavorable conditions more than some other bacterial species.
Bacterial species that have the ability to transform into endospores have an advantage over other bacterial species in surviving unfavorable conditions such as extreme temperatures, high pressure, low nutrient availability, and exposure to toxic chemicals or radiation. Endospores are highly resistant structures that form inside certain types of bacteria, allowing them to survive in a dormant state for extended periods of time until conditions become more favorable for growth and reproduction.
While endospore-forming bacteria may not necessarily reproduce faster or have faster motility than other bacterial species, their ability to survive in harsh conditions gives them a significant advantage in certain environments. Endospore-forming bacteria include species such as Bacillus and Clostridium, which are commonly found in soil, water, and other environments where conditions may not be favorable for growth and reproduction.
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Which phylum of worms has a true circulatory system?NoneAnnelidaPlatyhelminthesNematoda
Annelida possess a closed circulatory system. They have a muscular pumping hearts. The blood moves through the capillaries to be carried to the cells of the body.
Platyhelminthes does not have a circulatory system. They have limited way to carry oxygen to the rest of the cells of the body.
Nematoda also does not have a circulatory system but possess a complete digestive system. They use diffusion in order to breathe.
Answer - Option 2 - Annelida
im confused and i dont know how to do this.
The function of a cell is determined by the organelles it has.
The mitochondrion is primarily involved in cell energy generation. Thus, a cell with many mitochondria is likely to be an integral part of energy generation.The Golgi apparatus is involved in protein processing and storage o proteins. Thus, a cell with many Golgi apparatuses is likely to be an integral part of storage.The chloroplast is involved primarily in photosynthesis. A cell with several chloroplasts will likely function as a photosynthetic cell.In the image, cell A contains several Golgi apparatuses while cell B contains many mitochondria. In other words, cell A is likely to be for storage of proteins while cell B is likely for energy generation.
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Based on the cell organelles present in cells A and B;
Cell A will function mostly for the synthesis of the materials such as proteins.Cell B will function mostly in energy production for the cell and metabolic activities of the organism.What are cell organelles?
A cell organelle is a specialized subunit with a particular function that is typically found within a cell in cell biology.
Cell organelles are usually membrane-bound and found in mainly eukaryotic cells.
Some examples of cell organelles include:
NucleusRibosomesEndoplasmic reticulumGolgi apparatusChloroplastsMitochondriaLearn more about cell organelles at: https://brainly.com/question/6563752
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which of these forms when moves in the directions shown by the arrows in the diagram
Answer:
A. Mountain breeze
Pls give 5 stars and thanks!
Answer:
a
Explanation:
The organism is most likely classified as which of following?
Answer:
Long-tailed weasels and European otters are both classified into the family Mustelidae.
Explanation:
What is the force of attraction objects have due to their mass
classify each of the following as an element, compound, homogeneous mixture, or heterogeneous mixture. 1.water
2.Caesar Salad
3.milk and cereal
4.Iron filings
5.blood
6.sugar
7.sand
8.sea water
9.salt
10.carbon dioxide
Caesar Salad, milk and cereal, Blood, Sand are heterogeneous mixture while water, sugar and salt are compounds and Iron filings is a element and Sea water is a homogeneous mixture
A pure substance with only one kind of atom makes up an element. The elements oxygen, hydrogen, and iron are examples.
A compound is a substance that is composed of two or more distinct elements that have been chemically bonded together in a specific proportion. Examples include sodium chloride, carbon dioxide, and water.
A combination of two or more substances that are evenly distributed at the molecular level is referred to as a homogeneous mixture. The mixture's composition is constant throughout. Examples include air, sugar water solutions, and saltwater.
A combination of two or more substances that are not distributed equally is referred to as a heterogeneous mixture. Visual differentiation between the various elements is possible and with time, they may settle or separate. A salad with various ingredients, soil and vinegar dressing are some examples.
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What does the arrow in the food web represent?
Answer:
This represent the flow of energy.
lil more info:
The placement of the arrows in a food chain or food web is very important. The arrows always show the direction of the energy as it is transferred from one organism to another. The flow of energy can also be represented within an energy pyramid.
Answer:
An arrow in a food web represents the transfer of energy.
Explanation:
However as the energy in the food web gets higher it loses energy
What are the differences between animal and plant cells?
Answer: Animal cells and plant cells have several key differences in their structure and organelles. Here are some of the main differences between animal and plant cells:
Cell Wall: Plant cells have a rigid cell wall composed of cellulose, which provides support and protection. Animal cells lack a cell wall.
Chloroplasts: Plant cells contain chloroplasts, which are responsible for photosynthesis. Chloroplasts contain chlorophyll, the pigment that captures sunlight for energy production. Animal cells do not have chloroplasts.
Vacuoles: Plant cells typically have a large central vacuole that occupies a significant portion of the cell's volume. The vacuole stores water, nutrients, and waste products. Animal cells have smaller vacuoles, if any.
Shape: Plant cells often have a fixed shape due to the presence of the cell wall. Animal cells have a more flexible shape and can change their shape as needed.
Centrioles: Animal cells have centrioles, which are involved in cell division and the organization of the cytoskeleton. Plant cells lack centrioles.
Plasmodesmata: Plant cells have plasmodesmata, small channels that connect adjacent cells, allowing for communication and transport of materials. Animal cells do not have plasmodesmata.
Lysosomes: Animal cells contain lysosomes, which are organelles involved in the digestion of waste materials and cellular debris. Plant cells have fewer lysosomes or may lack them altogether.
Cilia and Flagella: Some animal cells have structures called cilia or flagella that are involved in cell movement. Plant cells generally lack cilia and flagella, although some exceptions exist.
It's important to note that while these differences highlight general characteristics, there can be variations in cell structures between different types of animal and plant cells.
Explanation:
How do different types of soil and fertilizers affect plant growth? What nutrients do plants need to grow, and how do they obtain these nutrients?
Different types of soil and fertilizers have a significant impact on plant growth,Soil properties such as texture, structure, pH level, and nutrient content can influence plant growth. For example, well-draining soil that is rich in organic matter, minerals, and nutrients supports plant growth.
Fertilizers provide essential nutrients such as nitrogen, phosphorus, and potassium to plants, which can enhance their growth rate and yield.
Plants require several nutrients to grow and develop, including macronutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur, and micronutrients such as iron, manganese, zinc, copper, boron, and molybdenum.
Plants obtain these nutrients through their roots from the soil or other sources. Macronutrients are usually required in larger quantities than micronutrients, but both are essential for optimal plant growth.
Plants obtain nutrients through two mechanisms: passive and active uptake. In passive uptake, nutrients are absorbed by roots through the process of diffusion, while in active uptake, specific transporters in the root membrane take up nutrients against their concentration gradient. Soil pH level affects nutrient availability, as some nutrients are more readily available at certain pH levels than others. Understanding soil properties and the role of nutrients is essential for successful plant growth and crop production.
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6) Two of the greenhouse gases that may be responsible for the increased ice melting in Greenland are
A) hydrogen and helium
C) oxygen and silicon
B) carbon dioxide and methane
D) nitrogen and oxygen
Answer:
A
Explanation:
Took the test
The name of two greenhouse gases that may be responsible for the increased ice melting in Greenland includes carbon dioxide and methane. Thus, the correct option for this question is C.
What are Greenhouse gases?Greenhouse gases may be defined as those gases that significantly allow solar radiations to enter but prevent the escape of heat radiations of longer wavelengths. The name of these gases may include carbon dioxide, methane, nitrous oxide, water vapor, CFCs, etc.
Carbon dioxide is the primary greenhouse gas contributing to recent climate change. Carbon dioxide enters the atmosphere through burning fossil fuels, solid waste, trees, and other biological materials.
Apart from this, it is a result of certain chemical reactions, such as cement manufacturing. Along with methane, they are the two greenhouse gases that are also responsible for the increased ice melting in Greenland.
Therefore, the correct option for this question is C.
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You have come into possession of a plant with lavender flowers. Knowing that the plant is self-pollinating, you harvest its seeds and plant them. Of the 106 plants that grow from these seeds, 31 have white flowers. Using a Punnett square, draw conclusions about the nature of the allele of lavender flowers.
Answer:
The correct answer is - heterozygous for lavender flowers (Ll)
Explanation:
As it is given that out of the 106 plants, 31 had white flowers which are approximately 3:1 or one-fourth, of the plants. It suggests that white flowers have recessive alleles (ll).
So, the color flower would be dominant for both allele LL or heterzygous Ll and the Punnett square should show the self-pollination
L l
L LL Ll
l Ll ll
It shows that the ratio of 3:1 is possible when there is a heterozygous condition of the flower allele present.
While antiviral treatments have drastically improved life expectancy and quality of life
for people living with Human Immunodeficiency Virus (HIV), preventing HIV infection
is still the primary goal.
The enormous genetic diversity of HIV is largely the result of its and it has made
it especially difficult to create a(n) against the virus.
Fhigh mutation rate; antibiotic
G high mutation rate; vaccine
Hlow mutation rate; antibiotic
)
low mutation rate; vaccine
Answer: G
Explanation:high mutation rate;vaccine
Animals that live in cold climates have a higher percentage of unsaturated fatty acids in their fats than animals found in warmer climates. Propose a reason why this is the case.
Answer:
Animals that live in cold climates have a higher percentage of unsaturated fatty acids in their fats compared to animals found in warmer climates due to the need for enhanced membrane fluidity and insulation.
Explanation:
In cold climates, maintaining an appropriate body temperature is crucial for survival. Unsaturated fatty acids have a lower melting point and remain liquid at lower temperatures compared to saturated fatty acids. By incorporating a higher percentage of unsaturated fatty acids into their fats, animals can increase the fluidity of their cell membranes even in colder conditions. This enhanced fluidity allows for the efficient transportation of vital molecules across cell membranes, ensuring proper cellular function.
Furthermore, unsaturated fatty acids provide insulation by preventing the solidification of fats at lower temperatures. By incorporating these flexible and fluid fats into their adipose tissues, animals can create a layer of insulation, which helps in conserving body heat and protecting vital organs from cold temperatures.
In contrast, animals living in warmer climates do not face the same challenges in terms of low temperatures. Saturated fatty acids, which have a higher melting point and solidify more easily, can be efficiently utilized in their fats for energy storage without compromising membrane fluidity.
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Someone plz help me :(
Answer:
A
Explanation:
sterols are precursors for vitamin d and cholesterol true or false
Sterols are precursors for vitamin D and cholesterol is a true statement. Sterols are a kind of fat found in plants and animals that have a steroid-like chemical structure and have been linked to human health benefits.
They are also known as steroid alcohols, and they are an essential part of the body's cell membranes. A precursor is a substance that the body converts into another chemical or compound. Precursors are intermediaries in the body's metabolic processes, converting one substance into another.
The statement Sterols are precursors for vitamin D and cholesterol is true. 7-dehydrocholesterol, which is derived from cholesterol, is a precursor to vitamin D3, which is then converted into calcitriol, the active form of vitamin D that is used by the body.
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Human babies have a gene that produces an enzyme that breaks down the sugar found in milk. Over time, this gene is shut off in most adult humans. A mutation in this gene allows some adults to continue to drink milk without discomfort. Why would this mutation have allowed early humans to survive?
A- it provided milk free from bacteria
B- it provided vitamins that could only be produced in milk
C- it provided more cattle that could be raised by early humans.
D- it provided an alternative source of nourishment for early humans.
Answer:
I think it would be d
Explanation:
what are some ways your body can respond to allergens?
QUESTION 1 Exercise 11.10. Butterflies. Alice, Bob, and Charlotte are looking for butterflies. They look in three separate parts of a field, so that their probabilities of success do not affect each other. • Alice finds 1 butterfly with probability 17%, and otherwise does not find one • Bob finds 1 butterfly with probability 25%, and otherwise does not find one • Charlotte finds 1 butterfly with probability 45%, and otherwise does not find one Let X be the number of butterflies that they find altogether. Write X as the sum of three indicator random variables, X1, X2, X3 that indicate whether Alice, Bob, Charlotte (respectively) found a butterfly. Then X= X1+X2 +X3. Find the expected value of X by finding the expected value of the sum of the indicator random variables. Your answer will have two decimal places. **This is a straight forward expected value of a sum of random variables, nothing fancy here! QUESTION 2 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? O A. Example 11.10, sampling without replacement O B. Example 11.11, sampling with replacement QUESTION 3 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The first step is to find the expected value of getting the first head. What is the expected value of getting the first head? This will be an integer answer. QUESTION 4 Exercise 11.16. Flipping coins. Flip a coin until the second head comes up. Let X be the number of flips needed to get the second head. What is the E(X). The next step is to find the expected value of getting the second head. Because this is identical to finding the expected number of rolls for the first head (independent events), we just multiply the first head's expected value by 2. This will be an integer answer. QUESTION 5 Exercise 11.17 (a). Waiting for favorite song. Michael puts his iTunes on shuffle mode where songs are not allowed to be replayed. He has 2,781 songs saved on iTunes, and exactly one of these is his favorite. How many songs is he expected to have to listen to until his very favorite song comes up? Is this like Example 11.10, sampling without replacement, OR like Example 11.11, sampling with replacement? A. Example 11.11, sampling with replacement B. Example 11.10, sampling without replacement
In Exercise 11.10, the expected value of the number of butterflies found by Alice, Bob, and Charlotte is obtained by finding the expected value of the sum of three indicator random variables.
In Exercise 11.16, the expected value of the number of flips needed to get the second head in a coin flipping experiment is determined. These exercises involve different scenarios of sampling with and without replacement.
In Exercise 11.10, the expected value of X, the total number of butterflies found, is found by calculating the expected value of each indicator random variable (X1, X2, X3) representing whether Alice, Bob, and Charlotte found a butterfly, respectively.
The expected value of each indicator variable can be obtained by multiplying the probability of success (finding a butterfly) by 1 and the probability of failure (not finding a butterfly) by 0. Then, the expected value of X is calculated as the sum of the expected values of the indicator variables.
In Exercise 11.16, the expected value of X, the number of flips needed to get the second head, is determined. To find this value, we first need to find the expected value of getting the first head. This scenario is similar to Example 11.11, which involves sampling with replacement.
Each coin flip is an independent event, and the probability of getting a head is constant at 0.5.
Therefore, the expected value of getting the first head is 1/p, where p is the probability of success (0.5 in this case).
In Exercise 11.17 (a), the scenario of waiting for a favorite song in Michael's iTunes playlist involves sampling without replacement. Each song played is not replayed, and there is only one favorite song among the total number of songs.
Therefore, this scenario is similar to Example 11.10, sampling without replacement.
To find the expected number of songs Michael needs to listen to until his favorite song comes up, the formula for sampling without replacement is used, which is the reciprocal of the probability of selecting the favorite song at each step.
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What element describes the imposition of order and harmony on a design? group of answer choices
The element that describes the imposition of order and harmony on a design is "Balance."
Balance refers to the distribution of visual weight in a composition to create a sense of equilibrium and stability. It involves arranging elements, such as colors, shapes, and textures, in a way that creates a harmonious and visually pleasing composition. There are different types of balance, including symmetrical balance, asymmetrical balance, and radial balance, each contributing to the overall aesthetic and visual impact of a design. Libra, which means "weight" or "balance" in Latin, is the source of the word "equilibrium." As a constellation, astrological sign, and representation of the zodiac, Libra is sometimes shown as a pair of balancing scales, frequently held by the blindfolded goddess of justice, which stands for justice, fairness, and equality. Biology, chemistry, physics, and economics all have different definitions of equilibrium, yet they all relate to the harmony of opposing forces.
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What happens to a renewable resource when
people begin to use it more quickly than it can be
replaced?
O A. It becomes a sustainable resource.
B. It becomes polluted.
O C. It becomes a nonrenewable resource.
O D. It becomes a natural resource.
SUBMIT
Answer:
C
Explanation: