Which is an example of using comparative anatomy to study evolutionary relationships?
For example, the wings of bats and birds, shown in the Figurebelow, look similar on the outside. They also have the same function. However, wings evolved independently in the two groups of animals. This is apparent when you compare the pattern of bones inside the wings.
A sperm cell fuses with an egg cell to produce a zygote. How does the DNA content of the zygote compare to that of the egg? Of the sperm?
Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?
Answer:
The correct answer is- density dependent factor.
Explanation:
Density dependent limiting factor is only relevant where carrying capacity exceeded in a particular habitat . Density dependent factor is a factor that limiting the population size whose effect depend on the number of individuals or people in a population.
Densely packed populations can easily read the disease such as typhoid due to close proximity to one another of the individuals of the population.
Thus, the correct answer is - density dependent factor.
________ are small programs that are executed within another application, such as a web page.
Applets are small programs executed within another application, such as a web page, typically written in JavaScript or Java. These scripts run within the user's browser, providing dynamic interaction. They are crucial for creating interactive web experiences.
Applets are small programs that are executed within another application, such as a web page. These programs are often written in programming languages like JavaScript or Java and run within the user's web browser.
When a user views a web page containing a JavaScript program, the script is executed by the user's browser, allowing for dynamic interaction within the web page. Applets are essential for creating interactive and engaging web experiences.
How do wind and water change rocks over time? A) They add minerals to the rocks. B) They change the shape of the rocks. C) They increase the mass of the rocks. D) They build up the rocks with small sand particles.
explain how eutrophication can change an aquatic ecosystem into a land ecosystem
Answer:
Eutrophication is a natural phenomena which occurs because of the surface runoff of minerals and sediments inside the water body where the water flow remains static for example lakes and ponds. The settled deposits aids in the growth and abundance of aquatic plants which depletes the oxygen level in the water. The increase in the abundance of plants typically wild weeds acquire the entire space occupied by the water body and this leads to the transformation of the aquatic ecosystem into terrestrial or land ecosystem.
Carbohydrate molecules have all of the following bonds except-
A.C-C
B.C-N
C.C-H
D.C-O
Answer:
B. C-N
Explanation:
Carbohydrates are bio-molecules which are basically made up of three elements named as carbon (C), hydrogen (H) and oxygen (O) so they will have bonds like C-C, C-H & C-O but will not have C-N bond.
Carbohydrates mainly serve the function of providing energy to the body. The energy lies in the the chemical bonds of carbohydrate molecules which is released when the these bio-molecules are oxidized in the presence of air.
Carbohydrates can exist as monosaccharides, disaccharides or polysaccharides.
Monosaccharides like glucose and fructose are the simplest and instant source of energy.
Disaccharides are sucrose, maltose, and lactose.
Polysaccharides like glycogen (in animals) and starch (in plants) are used for the storage of carbohydrates so that they could be used for energy in future.
Carbohydrate molecules have all of the following bonds except C-N. Therefore, the correct answer is option b.
Carbohydrates are organic compounds made up of carbon (C), hydrogen (H), and oxygen (O) atoms. These atoms are arranged in a specific way to form the carbohydrate molecules. The primary types of chemical bonds found in carbohydrate molecules are carbon-carbon (C-C) bonds and carbon-oxygen (C-O) bonds.
Here's an explanation of the bonds mentioned:
C-C Bonds (Carbon-Carbon Bonds): These are covalent bonds between two carbon atoms. In carbohydrate molecules, such as glucose or sucrose, you will find multiple C-C bonds as carbon atoms are linked together to create the carbon backbone of the molecule. These bonds are essential for the structure of carbohydrates.
C-O Bonds (Carbon-Oxygen Bonds): These are also covalent bonds but exist between carbon and oxygen atoms. C-O bonds are crucial in carbohydrates because they connect carbon atoms to oxygen atoms in the carbohydrate's functional groups, such as hydroxyl (-OH) groups. These bonds are important for the chemical properties and reactivity of carbohydrates.
C-N Bonds (Carbon-Nitrogen Bonds): While nitrogen (N) is an essential element in biological molecules like proteins and nucleic acids (DNA and RNA), it is not a typical component of carbohydrate molecules. Carbohydrates do not contain C-N bonds in their core structure. Nitrogen is usually found in amino acids (the building blocks of proteins), and you'll see C-N bonds in those molecules.
So, the option "B. C-N" is correct in stating that carbohydrate molecules do not typically contain carbon-nitrogen (C-N) bonds in their core structure. Instead, they are primarily composed of carbon, hydrogen, and oxygen atoms, connected by C-C and C-O bonds, which are characteristic of carbohydrates.
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In which location would soils develop faster? Explain.
exlqin how a change in the environment could cause a population crash
What happens to the endometrium if a zygote implants?
Which soil would you espect to be better developed: the soil on a hillside or the soil on a valley floor? Why?
50 POINTS PLZ HELP !!!!!!!
Human activities, like burning fossil fuels and deforestation, have greatly contributed to global warming. In this discussion assessment, you will go on a trip around the world to explore the effects of climate change.
Choose one destination that is represented by a flag. Write a paragraph about the effects of climate change in that destination. Post your paragraph on the Climate Change.
Will give brainlest please write a paragraph so five sentences
The question is: What is the relative age of layer 3? (Hint: With what absolute ages can you compare it?)
Layer 3 is younger than layer 2 but older than layer 4, with an estimated age of 40 million years.
Based on the principle of superposition, layers of sedimentary rock that are lower down are older than those above them. This means that layer 1 is the oldest layer in the image, and layer 4 is the youngest.
Therefore, layer 3 is younger than layer 2 and older than layer 4. The text in the image further clarifies that layer 3 is 40 million years old.
What procedures must be described in an agreement called an "assurance of compliance" with ohrp? procedures in place to ensure that the research complies with ethical principles (such as the world medical association’s declaration of helsinki). procedures in place that ensure that subjects will be protected in a manner commensurate with the common rule, including review by an independent committee comparable to an irb. procedures in place to outline how unanticipated problems will be reported to the local irb. procedures in place to outline how subjects will be randomized?
Answer;
-Procedures in place that ensure that subjects will be protected in a manner commensurate with the Common Rule, including review by an independent committee comparable to an IRB.
Explanation;
-HHS human subject protection regulations and policies necessitate that any institution that is involved in non-exempt human subjects research conducted or supported by HHS must submit a written assurance of compliance to OHRP.
- The Federalwide Assurance (FWA) is the only type of assurance of compliance accepted and approved by OHRP.
some students are observing the behavior of a male bird in the schoolyard. which of the following observed behaviors might behaviors might increase the probability of reproductive success?
The behavior that will increase the probability of reproductive success is
( A ) Made a chirping sound
Reproductive technique for a male birdWhen a male is calling for a female bird it makes a special sound ( chirping sound ) to attract its mate within the vicinity and that way the probability of a reproductive success will increase.
while other kinds of behaviors as listed in question cannot attract a mating partner and will lead to the decrease in the probability of reproductive success for the male bird.
Hence we can conclude that the behavior that will increase the probability of reproductive success is : ( A ) Made a chirping sound.
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The probability of reproductive success A. Made a chirping sound. Therefore, A. Made a chirping sound is correct .
Communication and Courtship: Chirping sounds in birds often play a crucial role in communication, particularly during courtship.
Male birds may use distinctive calls or songs to attract potential mates.
The ability to produce specific sounds can be a way for the bird to signal its presence, health, and genetic fitness to females.
Mate Attraction: Chirping is a common behavior associated with mate attraction in many bird species.
The male's ability to produce a distinctive and appealing chirping sound may attract female birds, increasing the likelihood of forming a pair bond and engaging in reproductive activities.
Territorial Assertion: Chirping can also serve as a means of territorial assertion.
By vocalizing its presence, the male bird may be signaling its ownership of a particular territory, which can be attractive to potential mates seeking a suitable breeding area.
Demonstration of Fitness: The quality and complexity of the chirping sound may convey information about the male bird's physical condition and genetic fitness.
Females may be more inclined to choose mates that demonstrate strong and desirable traits through their vocalizations.
While making a chirping sound alone may not guarantee reproductive success, it is a behavior often associated with mate attraction and courtship in birds.
The ability to effectively communicate through sounds is an essential aspect of reproductive strategies in many avian species.
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explain how to find the magnification of a microscope
Hideki has had difficulty sleeping. his doctor wishes to examine his sleep patterns to determine the cause of hideki's sleep problems. the doctor will most like perform a(n)
Suppose two scientists are trying to perform an experiment that involves dangerous chemicals. How might their be affected by not using a common measurement?
some injuries related to sports and exercise are ?
how could you tell that a cell is a plant cell and not an animal cell
Plant cells can be identified by their rigid cell wall, chloroplasts, a large central vacuole, and plastids, unlike animal cells that lack these structures but have organelles such as centrioles and lysosomes.
Explanation:When distinguishing between plant cells and animal cells, several key cellular structures can be observed. Plant cells have a rigid cell wall made of cellulose that surrounds the plasma membrane, which helps in maintaining a distinct shape and providing structural support that enables plants to grow upright. In contrast, animal cells lack this cell wall.
One of the most definitive features of plant cells is the presence of chloroplasts, which are the sites of photosynthesis, a process unique to plants and some protists that converts solar energy into chemical energy. Animal cells do not have chloroplasts. Additionally, plant cells often contain a single large central vacuole that holds materials and wastes, and helps to maintain proper pressure within the plant cells to provide structure and support. Animal cells may have small vacuoles, but not a large central one as seen in plant cells.
Another difference is that plant cells have plasmodesmata, which are channels between the cell walls of adjacent plant cells, facilitating communication and transport between them. They also possess various kinds of plastids like chloroplasts, leucoplasts, and chromoplasts that are involved in processes such as photosynthesis, storage, and imparting color. However, animal cells contain other organelles like centrioles and lysosomes that are absent in plant cells.
Before the calvin cycle begins, where is the energy stored?
The energy is stored in the ATP and NADPH molecules
Before the Calvin cycle begins, the energy is stored in the bonds of ATP and NADPH molecules
Calvin cycle is a process in which plants and algae turn carbon dioxide from the air into sugar.
Plants depend on the Calvin cycle for energy and food. Calvin cycle takes place in the stroma (in chloroplasts). The Calvin cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase.
Before the Calvin cycle begins, the energy is stored in the bonds of ATP and NADPH molecules
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If ash particles from an erupting volcano enter water, they can clog the gills of fish and other aquatic organisms causing them to choke.
This is an example of the _____ affecting the _____.
CHOICES: Biosphere, atmosphere, lithosphere
Answer:
lithosphere affecting the biosphere
Explanation:
An archived questions was, "One serving of a particular food contains 16g of carbohydrates, 2g of protein, and 10 g of fats. Approximately how many calories does it contain?" The archived answer was 300 calories.
How did you get this answer? Shouldn't it be 162?
(9 cal * 10g fat) + (4 cal * 16g carb) + (4cal * 2g protein)
please help me finding the answers.
A newly discovered solar system is found 600 billion kilometers from the sun. How many AU does this represent? Show your work.
Answer:
[tex]4011[/tex] AU
Explanation:
AU stands for astronomical unit. It is a unit of measurement in space.
One AU is equal to [tex]1.496 * 10^8[/tex] Kilometers.
Given -
The distance between the newly discovered solar system and the sun [tex]= 600[/tex] 600 billion kilometers.
[tex]= 600* 10^9\\= 6 ^ 10^ {11}[/tex] kilometers
Converting this distance (in kilometer) to AU , we get -
[tex]\frac{6*10^{11}}{1.496*10^8} \\= 4.011 * 10^3\\= 4011[/tex]AU
In general, which trophic level has the LEAST energy available to it? A) producer B) primary consumer C) secondary consumer D) tertiary consumer
The trophic level which has the least energy available to it is the tertiary consumer. Therefore, option D is correct.
What is the flow of energy in an ecosystem?The food chain and food web are used to transfer energy. Plants, who are the primary energy providers in the ecosystem, use their chloroplasts to collect sunlight, which is then partially converted into chemical energy during photosynthesis.
In an ecosystem, energy always moves in a single direction. It is referred regarded as unidirectional because, in order to maintain an organism's homeostasis, some energy is wasted as heat when going from one trophic level to the next.
Thus, the trophic level which has the least energy available to it is the tertiary consumer. Therefore, option D is correct.
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explain three main functions of the kidneys
Final answer:
The kidneys perform three main functions: filtration of blood to remove waste, regulation of fluid and electrolyte balance, and controlling blood pressure and red blood cell production.
Explanation:
The kidneys are vital organs with several crucial roles in maintaining the body's health. The three main functions of the kidneys include:
Filtration of the blood to remove waste products and excess substances. This process involves filtering out toxins, urea, and other waste products from the bloodstream, which are then excreted as urine.Maintaining overall fluid and electrolyte balance in the body. The kidneys regulate the amount of water and electrolytes like sodium, potassium, and calcium, vital for cellular functions and overall homeostasis.Regulation of blood pressure and red blood cell production. The kidneys produce hormones such as renin to regulate blood pressure and erythropoietin (EPO) to stimulate the production of red blood cells, essential for carrying oxygen throughout the body.These functions are critical in maintaining homeostasis, which includes proper ion and water balance, and the elimination of potential toxins through urine.
Scientists who contributed to our current body of knowledge
Water molecules form hydrogen bonds to help in the process of water transport. Which property of water is described?
Some of the waves energy stays in the_______
Fill in the blank
Some of the wave's energy stays in the medium itself. This is because the energy of a wave depends on its amplitude and frequency of it.
Where does the energy of a wave go?The amount of heat that is constructed or produced by the breaking wave is so imperceptibly small that I never could have imagined that that was what was happening, but it does make perfect sense. The energy goes from wind to water to sound and heat.
The components of the energy are Kinetic and Potential. The total mechanical energy of the wave is the sum of its kinetic energy and potential energy. The energy of the wave correspondingly absorbed via the medium in which is significant travels a specific distance.
Therefore, some of the wave's energy stays in the medium itself. This is because the energy of a wave depends on its amplitude and frequency of it.
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