Answers
Answer:
In humans we have total 46 chromosomes out of which 44 are know as autosomes and rest last pair are termed as sex chromosomes. the last pairs are different in male and in female .
in female it is XX and in male it is XY
Explanation:
the last two pairs also helps in the determination of the gender of the child .
LIKE (the image) .
Related Questions
The 5' end of mRNA serves as a binding site for __________, which allow translation to begin.
a.The promotor proteins
b.The ‘A’ site of the large ribosomal subunit
c.tRNA
d.Initiation factors
Answers
Each mRNA molecule being translated often undergoes numerous initiations. The 5′ end of the mRNA is threaded into a new ribosome as soon as the previous ribosome has translated enough of the nucleotide sequence to move out of the way. Hence, it allows the translation to begin.
A ribosome outside the nucleus decodes messenger RNA (mRNA) during translation to produce a specific polypeptide or amino acid chain. The polypeptide performs its unique functions inside the cell after folding into a functional protein. The ribosome facilitates decoding by promoting the binding of complementary tRNA anticodon sequences to mRNA codons. The tRNAs transport certain amino acids that are linked together to form a polypeptide as the mRNA passes through and is "read" by the ribosome.
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offspring produced by ___
reproduction inherit some of the genetic information from each ____
Answers
Answer: simple parent
Explanation:
Water runs through each of these parts in the vascular system of the star fish, except for the:
O Ossicles
O Radial Canal
O Tube Feet
O Madreporite
Answers
What must students use when summarizing an informational text? select 3 options. A casual toneinformal languageacademic languagean objective, formal tonea variety of sentence types.
Answers
When summarizing an informational text, students should use:an objective, formal tone, academic language, a variety of sentence types.
1) an objective, formal tone, as the purpose is to provide a concise and impartial overview of the text; 2) academic language, which is appropriate for a scholarly or educational setting; and 3) a variety of sentence types, as this helps to maintain the reader's interest and convey information effectively. Using a casual tone or informal language is not appropriate when summarizing informational texts, as this can detract from the credibility and professionalism of the summary. By using these three elements, students can effectively summarize informational texts in a clear, concise, and professional manner.
Question: What must students use when summarizing an informational text? Check all that apply.
Academic language
An objective, formal tone
A variety of sentence types
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____is the process by which a cell divides to produce two ___
cells
Answers
Answer:
Mitosis is the process by which a cell divides to produce two daughter cells.
Explanation:
Hope it helps! =D
Layers of the Atmosphere Activity
Discussion Questions:
Study the graph you have formed. What do you notice about the air temperature
as the height of the atmosphere increases?
Answers
On the basis of the graph, the air temperature decreases as the height of the atmosphere increases except in the stratosphere and thermosphere.
What is the relation between air temperature and altitude?Normally the temperature of the air decreases with increasing altitude but in layers of the stratosphere and thermosphere air temperature increases as the height increases in these layers.
The temperature decreases due to an increase in air pressure. pressure and temperature are inversely proportional to each other.
Thus, this is the relation between air temperature and altitude.
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Your question is incomplete, most probably the full question is this:
Layers of the Atmosphere Activity
Discussion Questions:
Study the graph you have formed. What do you notice about the air temperature as the height of the atmosphere increases?
The image is attached below:
Describe Hershey and chase experiment
Answers
Hershey and Chase experiment was an experiment in molecular biology to find out more on genetic material transference in viruses and infectious bacteria.
What was the Hershey and Chase experiment?The Hershey-Chase experiment was a landmark experiment in the field of molecular biology that was conducted in 1952 by Alfred Hershey and Martha Chase. The experiment aimed to determine whether bacteriophages, or viruses that infect bacteria, transfer their genetic material through protein or DNA.
The results showed that the radioactive phosphorus, which is a component of DNA, entered the bacteria and became incorporated into the bacteria's genetic material. In contrast, the radioactive sulfur, which is a component of proteins, did not enter the bacteria and was not incorporated into their genetic material.
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he following diagram shows the branching tree diagram for some animals.
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the greatest number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answers
The two organisms that share the least number of derived characteristics are Kangaroo and chimpanzee.
What is an organism?
Taxonomy divides living things into categories like multicellular animals, plants, and fungus, or unicellular microbes like protists, bacteria, and archaea.All kinds of creatures are capable of responding to stimuli in some capacity and reproducing, growing, and developing. Multicellular organisms that distinguish specialised tissues and organs throughout development include squids, tetrapods, vascular plants, beetles, and mushrooms.Prokaryotes and eukaryotes are both types of unicellular organisms. The two distinct domains of bacteria and archaea are prokaryotes.To know more about organisms, click the link given below:
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Damage to this part of the cell would most likely lead to muscle damage of the organism?
Answers
Answer:
When muscle is damaged, a protein called myoglobin is released into the bloodstream. It is then filtered out of the body by the kidneys. Myoglobin breaks down into substances that can damage kidney cells. Rhabdomyolysis may be caused by injury or any other condition that damages skeletal muscle
Which Fisheries are used as a major source of protein?
Plain
Coastal
Hilly
Desert
Answers
Answer:
The Correct answer is A that is Plain Fisheries
Explanation:
Plain Fisheries for ex- Carp and Tilapia are used as a major source of protein because These Fish contain all the essential amino acids which makes them a high-quality source of protein.
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Which part of the scientific method is best illustrated by the ecologist creating a plot of wetland and altering the salinity of the soil to different levels?
A) forming a hypothesis
B) setting up an experiment
C) communicating the results of a study
D) collecting data
Answers
What is the most common antibiotic-resistant bacteria?
Answers
MRSA (Methicillin-resistant Staphylococcus aureus) is the most common antibiotic-resistant bacteria.
More about MRSA:
MRSA is usually spread through a wound, or when someone shares an infected object that has come in contact with an infected person, with a person who is not infected.
MRSA is also a mutation of staph.
Image found at: https://kidshealth.org/en/teens/mrsa.html
I apologize if I was wrong. I hope you have a lovely day! :)
Answer:
MRSA
Explanation:
The most common antibiotic-resistant bacteria is methicillin-resistant Staphylococcus aureus (MRSA). MRSA is a type of staph infection that is resistant to many commonly used antibiotics, including methicillin and other beta-lactam antibiotics. This makes MRSA infections difficult to treat and can increase the risk of serious health problems, such as sepsis and pneumonia. MRSA is most commonly found in healthcare settings, such as hospitals and nursing homes, but it can also occur in communities. It is important to practice good hygiene, such as washing your hands frequently and covering your nose and mouth when you cough or sneeze, to help reduce the spread of MRSA and other antibiotic-resistant bacteria.
Image : https://www.everydayhealth.com/infectious-diseases/staph-mrsa/truth-about-mrsa-infection/
Allen
Many scientists oppose offshore drilling. Since the 1970s there have been several devastating oil spills as a result of oil exploration and drilling: Ixtoc, Exxon Valdez and, most recently, the Deepwater Horizon blowout off the coast of Louisiana. Ecosystems may survive, and some may eventually recover from such oil spills. But the overall effects are far reaching and long lasting. Scientists still see the effects of the toxic spill on the crab populations in surrounding wetlands. Others argue that the effects of not drilling are just as harmful. But, rather than ecosystems, it harms the economy. If we can drill our way out of poverty, then we owe it to ourselves to do so. In addition to this, it is put forth that reliance on foreign oil leads to the entrenchment of hostile regimes in oil rich regions. Extensive research along the Gulf Shore has uncovered a rise in cancer rates directly linked to consumption of seafood contaminated by the Deepwater Horizon blowout. How are the pro-drilling and anti-drilling arguments affected by this discovery?
A It weakens the anti-drilling argument and weakens the pro-drilling argument
B It is impossible to say how this evidence will impact either argument.
C It supports the anti-drilling argument.
D It supports the pro-drilling argument.
Answers
Offshore drilling, in actuality, carries significantly greater environmental danger than benefit. Utilizing these fuels and burning them results in significant carbon emissions and climate change. Thus, option B is correct.
What are the causes of offshore drilling?The impacts and dangers of human offshore oil and gas development, which include extensive onshore habitat loss.
Frequent oil spills, the release of toxic drilling muds, a potentially catastrophic oil spill, and direct harm to marine mammals during exploration, are in no way comparable to the seepage of tar that occurs naturally.
Therefore, The majority of accidents involving offshore oil rigs are caused by blowouts. Natural calamities continue to be a risk, but faulty machinery and structural flaws are a key factor in drilling rig mishaps.
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In a chemical reaction, bonds in reactant molecules are broken and new bonds
are formed to yield products.
How does an enzyme make this happen at an optimal rate in a cell?
A. It lowers the amount of energy needed to break the bonds in the products.
B. It increases the amount of energy needed to break the bonds in the
substrate.
C. It increases the amount of energy needed to break the bonds in the
products.
D. It lowers the amount of energy needed to break the bonds in the
substrate.
Answers
Answer:
D. It lowers the amount of energy needed to break the bonds in the substrate.
Explanation:
Enzymes play a crucial role in catalyzing chemical reactions in cells. They do so by lowering the activation energy required for a reaction to occur. An enzyme works by binding to a specific substrate, or reactant molecule, and creating an environment around it that makes it easier for the substrate's bonds to break and for new bonds to form. This allows the reaction to proceed at a much faster rate than it would without the enzyme.
In this context, the correct answer is (D) It lowers the amount of energy needed to break the bonds in the substrate. This is because the enzyme acts to lower the activation energy required for the substrate's bonds to break, allowing the reaction to occur more easily and at a faster rate. By reducing the energy needed to initiate the reaction, the enzyme makes it more likely that the reaction will occur, and thus the rate at which products are formed is optimized.
Regular lawn mowing selects for short-headed rather than long-headed dandelions because:
a. tall flowers spread their seeds farther
b. tall flowers cannot reproduce
c. short flowers can reproduce
d. short flowers spread their seeds farther
e. short flowers have less competition when the lawn is mowed often
Answers
The answer is (a) tall flowers spread their seeds farther.
Regular lawn mowing selects for short-headed rather than long-headed dandelions because tall flowers with long heads produce seeds that are further away from the base of the plant, making them more likely to be removed by lawn mowers. This reduces the chances of the tall flowers producing offspring, which decreases their overall fitness in the lawn environment. In contrast, short-headed dandelions have their seeds closer to the base of the plant, making them less likely to be removed by lawn mowers. This allows the short-headed dandelions to have a higher chance of producing offspring and passing on their traits, leading to the selection of short-headed dandelions in lawns that are regularly mowed.
Option (b) is not correct because tall flowers can reproduce, but they may be less successful at doing so in a lawn environment that is regularly mowed.
Option (c) is not correct because both short and tall dandelions can reproduce, but the likelihood of successful reproduction may differ depending on the characteristics of the plant.
Option (d) is not correct because the distance that seeds are spread is not necessarily related to the size of the flower head.
Option (e) is not correct because the height of the plant is not necessarily related to its ability to compete with other plants in the lawn environment.
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Helppppp it’s due today
Answers
Stablizing selection is represented in graph A, and distructive selection is represented in graph B. Thus, option B is correct.
What will be the equation?
Given inequality is,
x + 2y ≤ 47
This inequality has a sign of less than equal to ( ≤ ). Properties of this inequality when graphed will be sign of equal to in the given inequality shows that the graph of the line will be a solid line.
Sign of less than represents the shaded region below the line.The graph lying in first quadrant and graph of horizontal line lying in the fourth quadrant are representing functions.
Thus, Stablizing selection is represented in graph A, and distructive selection is represented in graph B. Thus, option B is correct.
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The following table shows the duration of a year on some unknown planets of equal mass.
Duration of Year
Planet Duration of Year
Y 224 days
Z 320 days
Which of the following best explains which planet is closer to the sun?
Planet Y, because gravity is directly proportional to the square of distance
Planet Z, because gravity is directly proportional to the square of distance
Planet Z, because the sun exerts a greater gravitational force on it than on planet Y
Planet Y, because the sun exerts a greater gravitational force on it than on planet Z
Answers
Answer: Planet Y, because the sun exerts a greater gravitational force on it than on planet Z
Explanation:
5. Fill in Box 5.16, listing three tissue types that either secrete, absorb, or store things for the human body, and explain what these tissues do.
Box 5.16 Tissue Types That Secrete, Absorb, or Store
Tissue
What Does It Secrete, Absorb, or Store?
Answers
Most of the secretory and absorptive tissues are epithelial tissues, while those that act as storage units are connective tissues and simple cuboidal epithelium and simple columnar epithelium are useful in the absorption and secretion of molecules during active transport.
What are Absorptive tissues?Most of the absorptive tissues contain epithelial cells that protect the human body from dangerous components in ingested foods where epithelial cells are important gateways to the human body.
Simple columnar epithelia are epithelia specialized for absorption that often have apical cilia or microvilli where these cells line the stomach and intestines.
Thus, most of the secretory and absorptive tissues are epithelial tissues.
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If a population grows larger then it’s evironmental carrying capacity then
Answers
In snapdragons plants , the alleles for red and white flowers show incomplete dominance and results in a pink flower . Cross a pink snapdragon with a pink snapdragon . Show genotypic and phenotypic percentages of the generation
Answers
Answer:
In snapdragons, the gene for flower color has two alleles, R (red) and W (white). If a plant has the genotype RR, it will have red flowers, if it has the genotype WW, it will have white flowers, and if it has the genotype RW, it will have pink flowers because of incomplete dominance.
When two pink snapdragons (RW x RW) are crossed, their offspring will have the following genotypic and phenotypic ratios:
Genotypic ratios:
RR: 25%
RW: 50%
WW: 25%
Phenotypic ratios:
Red flowers: 25%
Pink flowers: 50%
White flowers: 25%
In this case, half of the offspring will have the same genotype (RW) and phenotype (pink) as the parents, while the other half will have different genotypes (RR and WW) and phenotypes (red and white).
Which of the following statements is not true?
A. Proteins can assemble into filaments, sheets, and spheres.
B. The amino acid sequence illustrates the primary structure of proteins.
C. The first step in the purification of most proteins is to disrupt tissues and cells.
D. The protein domain is defined as any segment of a polypeptide chain that can fold independently into a compact stable structure.
Answers
The first step in the purification of most proteins is to disrupt tissues and cells.
Describe primary structure of protein.
The primary structure of a protein is thought to be its linear amino acid sequence. Only twenty different amino acids, each with a distinct side chain, make up proteins. Different chemistries can be found in the side chains of amino acids. The majority of amino acids have side chains that are nonpolar.
Any portion of a polypeptide chain that can independently fold into a small, stable structure creates the protein domain. A domain is the modular building block from which many larger proteins are assembled. A domain typically has between 40 and 350 amino acids.
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In this project, you will design and conduct an investigation in order to provide evidence that a feedback mechanism helps a living organism maintain homeostasis.
Background
The internal and external environments of living organisms are constantly changing in many ways. To stay alive, a living thing must maintain homeostasis (internal stability). Feedback mechanisms help living systems maintain this stability. A feedback mechanism does this by sensing a change in a condition and causing a response. Thus, it keeps an organism's internal conditions within a tolerable range. A positive feedback mechanism is one that encourages the change that was detected. A negative feedback mechanism is one that discourages the change.
Both the stimulus for feedback and the response can be internal or external. For example, an increase in a person's heart rate while running is an internal response to an internal stimulus. The upward movement of tree sap in spring is an internal response to an external stimulus. A lizard running under a rock to cool off in hot weather and a leaf's stomata opening and closing as the humidity rises and falls are external responses to external stimuli.
Before You Begin
1. Access and carefully read the document Guidelines for Safely Using Live Animals in Investigations. It can be accessed here, via the link ( https://media.apexlearning.com/One-Off/201907/24/39be3e51-02ee-4424-95cf-8d542ed5b16d.pdf ) the landing page of this activity, and in the Student Resources section of the course. Follow these guidelines as you design and conduct your investigation.
2. Select the type of animal or plant that you will investigate. The organism you select must have the following qualities:
It must be safe for you to handle (if necessary) and easy to care for.
It must display observable responses to external stimuli.
It must be observable without magnification or by using readily available tools (e.g., hand lens, light microscope, video magnifier, or binoculars).
It must be inexpensive, easy to obtain from a local source (such as your yard, a garden center, or a pet supply store), and easy to release or dispose of.
In order to conduct an experiment, you will need to have several individuals in each test group and control group. The chart contains the names of some types of organisms that are appropriate for such a study.
Appropriate Study Organisms
Plants
Animals
Bean, pea, or corn plants grown from seeds
Bedding plants from a nursery, such as cosmos, cucumber, oxalis, petunia, snapdragon, or zinnia
Crickets
Earthworms
Mealworms
Pill bugs
Water fleas (Daphnia sp.)
3. Research the appropriate methods for releasing or disposing of the organisms used in your investigation. You might need to do some research to discover examples of external stimuli and the responses that help organisms maintain homeostasis.
Part I: Design an Investigation (25 points)
1. Write a hypothesis that you will test with your investigation. (5 points)
2. Design an experiment that can test your hypothesis. Describe your design, including the organism and materials you plan to use, the investigation's variables, and your step-by-step procedures. (10 points)
3. Review your experimental design with your teacher. Verify the type of living organism you will study and materials you will need in order to conduct the experiment. Make sure the organisms and materials you need are readily available to you and that you have a plan to later dispose of the organisms and materials. You will also need a place to set up and conduct your experiment. Write a summary of the conversation you had with your teacher. (10 points)
Part II: Conduct Your Investigation (25 points)
After your design is approved, you will need to carefully describe and diagram your procedures and the types of data you plan to collect. Include the initial conditions, such as the source of your subjects, their activity level or location, and the temperature or amount of light or air present. Also include the final conditions of the subjects. Refine and repeat your experiment if your initial data do not provide evidence that your plants or animals responded to a stimulus. Determine whether a positive or negative feedback mechanism is involved. Submit a report to your teacher that includes the following:
Your final investigation design, including:
A list of materials you used during the investigation
A list of all the variables: independent variables, dependent variables, constants, and controls
A step-by-step procedure that includes at least three replications of each treatment
The data you collected, organized into tables and/or charts
The conclusions you were able to draw from your investigation
(giving 50 or more points)
Answers
Materials: Living organism (example: mouse, or plant), Data collection equipment (example: thermometer, pH meter, etc.), Computer or other device for data analysis.
What is equipment?Equipment is any physical item that is used to carry out an activity, provide a service, or manufacture a product. It can range from small tools and supplies to large machinery and buildings. Examples of equipment include tools, computers, vehicles, furniture, machines, buildings, and systems. Equipment can be used for a variety of purposes, such as to construct a building, to operate a business, to transport goods, to produce energy, to monitor a system, and to provide medical care. The selection of equipment depends on the task to be accomplished and the resources available. Proper use, maintenance and storage of equipment also play a key role in ensuring its effectiveness and efficiency.
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Rock fragments that are tumbled and carried over long distances by this stream are most likely becoming
Answers
What function do proteins not play in the plasma membrane of animal cells?
Cell division
Attach cells together
Transport
Receptors
Answers
Answer:
Proteins in the plasma membrane of animal cells do not play a direct role in cell division. They do play roles in attaching cells together, transporting molecules in and out of the cell, and acting as receptors for signaling molecules.
What is an element? Is water (H2O) considered an element?
Answers
Answer: a element is a part or aspect of something abstract , especially one that is essential or characteristic YES water is an element
Explanation:
Answer: yes it is..
Explanation:
In the image below, in which location is carbon released into the atmosphere?
A
B
C
D
Answers
Answer: (d) the carbon released into the atmosphere at location D.
Polymer A
All monomers have rings.
It contains no N or P.
The bonds between monomers involve The bonds between monomers involve
sugar molecules.
sugar molecules.
O Lipids and proteins
Polymer B
All monomers have rings.
What two classes of biomolecules are being compared?
Nucleic acids and proteins
It contains both N and P
Lipids and nucleic acids
O carbohydrates and nucleic acids
Answers
The two classes of biomolecules being compared are carbohydrates and nucleic acids.
The correct option is D.
What are nucleic acids and carbohydrates?Macromolecules that are made up of oxygen, carbon, and hydrogen are known as carbohydrates. They consist of monosaccharides and are present in meals like bread.
Carbohydrates have ring structures but do not contain nitrogen and phosphorus.
Macromolecules called nucleic acids are the information molecules of every organism's genetic material is made up of macromolecules called nucleic acids. Nucleotide monomers make up their structure.
Nucleic acids have ring structures that contain nitrogen and phosphorus.
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In an ecosystem, there are two color varieties within a species of toads: brown and green. Over 50 years, the proportion of the
population that is green increases from 20% to 50%. Which statement is the most likely to explain this change? (1 point)
O Pollution caused a decrease in the proportion of brown toads.
O The environment changed such that toads that can jump higher into the trees to survive better.
O The environment changed such that green toads can blend into their surroundings better.
O A disease caused a decrease in the proportion of brown toads.
Answers
Answer:
Explanation:
The most likely explanation for the increase in the proportion of green toads in the population is that (c) the environment changed such that green toads can blend into their surroundings better. This increased their chances of survival and reproductive success, leading to a higher proportion of green toads in the population over time.
The following questions refer to the diagram below. Fill in the blanks and answer the
questions below.
reactants
Progress of the reaction
1. Is this reaction endergonic or exergonic?
2. Which has more free energy, reactants or products?
3. Which letter refers to the change in free energy of the reaction?
Answers
The given reaction is an exergonic reaction. In an exergonic reaction, the reactant's free energy is more than the products.
Why is the the reactant's free energy more than the products?This is because an exergonic reaction releases energy as the reactants are converted to products. The released energy comes from the potential energy stored in the chemical bonds of the reactants. As a result, the products have less free energy than the reactants, since some of the potential energy has been released as usable energy (such as heat or work) during the reaction. The difference in free energy between the reactants and products is k.
The letter W refers to the change in free energy of the reaction.
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What human problems might cloning address in the future?
Answers
Problems human might address about cloning in the future include larger babies at birth and a range of birth abnormalities in crucial organs like the liver, brain, and heart.
What are the advantages of cloning?
Cloned animals are better breeders that are used to create healthier progeny. Cloning animals has enormous advantages for consumers, producers, and threatened species: To produce more wholesome and safe food, farmers and ranchers can use cloning to speed up the reproduction of their most productive livestock.
Cloning people has drawbacks, including larger babies at birth and a range of disorders in crucial organs including the liver, brain, and heart. Premature aging and immune system issues are further implications. The relative age of the chromosomes in the cloned cell is a different potential issue.
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