Answer:begins without any further replication of the chromosomes. the nuclear envelope breaks down and the spindle apparatus forms
Explanation:
what are two characteristics of all animals?
Answer:
Multicellular or unicellular.
Explanation:
Some animals can be multicellular or unicellular. some animals are made up if cells that do not have cell walls too.
Answer:
All animals are multicellular organisms.
All animals are heterotrophic.
Explanation:
All animals are multicellular because their bodies are made up of more than one cell.
All animals are heterotrophic because they get food and energy by consuming plants and animals.
Question 7 (1 point)
glucose + fructose -> sucrose + water is a type of
reaction
Answer: The given reaction is a "Dehydration Synthesis Reaction".
Explanation:
In chemical science the antonym of hydration is dehydration reaction which is a common process of conversion take place by involving loss of water from reacting molecule or ion. For an instance the dehydration process help in formation of disaccharide (sucrose) from two monosaccharides (glucose + fructose) as given in reaction.
Some other examples are like conversion of an acid and an alcohol into an ester and reaction called as "Fischer–Speier esterification", Conversion of an alcohol to alkene etc. Normally dehydration is followed by heating or leaving at room temperature, although it is a time taking process. Some common dehydrating agents are like alumina and sulfuric acid for organic synthesis.
The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either
speeding up or slowing down?
Starting Velocity
Ending Velocity
30 km/h
mo
20 km/h
30 km/h
0 km/h
O km/h
30 km/h
The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either
speeding up or slowing down?
Starting Velocity
Ending Velocity
Car A
30 km/h
30 km/h
Car B
O km/h
20 km/h
Car C
30 km/h
O km/h
Car D
O km/h
O km/h
Car E
20 km/h
30 km/h.
Answer:Acceleration is present in car B and E.
Deceleration is present in car C.
No change in velocity is seen in car A and D.
Explanation:Acceleration is defined as the rate of change of velocity with time and is having a dimensional formula of [tex]distance /time ^2[/tex]
When a body is having acceleration, the body has more final velocity than initial velocity. Deceleration is the opposite of acceleration which is seen when the body has less final velocity than initial velocity.
In A:
Initial velocity= 30 km/hr.
Final velocity= 30 km/hr.
So change in velocity = 30-30 km/hr = 0 km/hr.
So no acceleration is present.
In B:
Initial velocity= 0 km/hr.
Final velocity= 20 km/hr.
So change in velocity = 20-0 km/hr = 20 km/hr.
So acceleration is present.
In C:
Initial velocity= 20 km/hr.
Final velocity= 0 km/hr.
So change in velocity = 0-20 km/hr = -20 km/hr.
So deceleration is present.
In D:
Initial velocity= 0 km/hr.
Final velocity= 0 km/hr.
So change in velocity = 0-0 km/hr = 0 km/hr.
So no acceleration is present.
In E:
Initial velocity= 20 km/hr.
Final velocity= 30 km/hr.
So change in velocity = 30-20 km/hr = 10 km/hr.
So acceleration is present.
Answer:
B, C, E are the right answers
Explanation:
I got this question on a test and got these as the right answers
Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table below shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.
Before the three-dimensional structure of DNA was discovered, scientists knew that DNA contained nitrogenous bases. The table below shows the percentages of the nitrogenous bases in a DNA sample. Which rule can be used to determine the percentages of the missing nitrogenous bases? Complete the table AND explain your answer.
Base Percent Adenine 23 Thymine ___ Cytosine 27 Guanine ____
Answer:Chargaaf's rule can be used to find out missing percentages. Thymine will be 23% and Guanine will be 27%.
Explanation:Chargaaf was a very popular scientist who worked on the DNA even before Watson and Creek discovered the DNA structure. Its even very evident that because of Chargaaf's rules, Watson and Creek were able to formulate their structure of DNA.
One of the rules of Chargaaf said that the ratio of purines to pyrimidines in a DNA is always 1:1. That means the summation of adenine and guanine is to thymine and cytosine will be 1:1. This is actually because adenine is complementary to thymine and guanine to cytosine.
Thus in the given DNA chart, adenine is 23%. So, thymine will also be 23%. Its given that cytosine is 27%. So, guanine will also be 27%. The answer can be checked as the summation of all the numbers give a total of 100%.
PLEASE HELP!!!!
Modeling the Calvin Cycle Exploration
1. Glucose, a six-carbon chain, results from the output of the Calvin cycle. Did your exercise generate a glucose molecule?
2. When is glucose generated?
3. What is the chemical formula for photosynthesis?
4. Did the complete process of photosynthesis take place in the way you modeled it in this activity? Explain your answer.
Answer: 1) The answer is no, because we don't create energy, 2) In plants, it's produced in the chloroplasts of plant leaves during the chemical process photosynthesis., 3) 6CO2 + 6H2O → C6H12O6 + 6O2., 4) I don't know
Explanation: For answers one and four it's easier with a picture of the experiment you did, so they may not be right.
which disorder is.m created as a result of the final chromosomal change that is shown?
Answer:Down syndrome
Explanation:
Numerical disorders occur when there is a change in the number of chromosomes (more or fewer than 46). Examples of numerical disorders include trisomy, monosomy and triploidy. Probably one of the most well-known numerical disorders is Down syndrome (trisomy 21)
What are the four main threats to biodiversity?
Answer:
I think the main reasons why Biodiversity is under serious threat is as a result of human activities. The main dangers worldwide are population growth and resource consumption, climate change and global warming is also a big reason. Habitat conversion and urbanisation, invasive species that dont belong, over-exploitation of natural resources and environmental degradation.
Hope this helps :)The four main threats to biodiversity are as follows:
Overexploitation.Climate change.Habitat loss.Introduction of Invasive species. What is Biodiversity?Biodiversity may be defined as the sum total of all the variety of living organisms present on the earth's surface. It includes the measure of variations at the genetic, species, and at ecosystem levels.
Overexploitation involves the elimination of a particular type of organism due to its overconsumption for the benefit of humans as well as other living organisms.
Climate change leads to severe impacts on the survivability of living entities. It includes global warming, El Nino effects, coral reef, etc.
Habitat destruction due to urbanization, or industrialization is also one of the major threats to biodiversity. The habitat gets disturbed due to human activities and interference.
The introduction of invasive species limits the resources that were part of native species. And due to this the competition increases and hence native species have to be eliminated, and biodiversity decreases.
Therefore, overexploitation, climate change, habitat loss, and invasive species are the four major threats to biodiversity.
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Which is one of the bases found in DNA?
O
A. Adenine
O
B. Serine
O
c. Huanine
O
D. Polymine
Final answer:
Adenine is one of the bases found in DNA, pairing with thymine to form part of the DNA structure through hydrogen bonding.
Explanation:
One of the bases found in DNA is adenine (A). Adenine is one of the four nitrogenous bases in DNA, along with thymine (T), cytosine (C), and guanine (G). These bases pair up to form the rungs of the DNA ladder, with adenine pairing specifically with thymine through hydrogen bonds. The structure of DNA is stabilized by these complementary base pairings, and any change in these pairings, such as an adenine replacing a cytosine, could potentially alter the DNA structure and thus the genetic information it carries. In the context of nucleic acids, these bases are attached to a deoxyribose sugar and a phosphate group to form a nucleotide.
What is the relationship between mitosis and the cell cycle?
Brainliest if correct
Mitosis represents only about 10% of the cell cycle.
The cell cycle represents about 90% of mitosis.
DNA synthesis takes place during mitosis; the cell divides in two during the cell cycle.
The parent cell is created during mitosis; the daughter cells are a result of the cell cycle.
Answer:
The cell cycle represents about 90% of mitosis.
Explanation:
The cell starts the process resulting in division. The entire cell cycle may be considered to be in four phases; G1, S, G2, and M. In the G1 phase, the cell doubles in size, and there is formation of new organelles and materials required for two cells. During this phase, there is nucleus migration to the center of the cell. This phase ends with the G1/S checkpoint. The process can be terminated at this point, or proceed to S phase in which DNA and associated nuclear proteins are replicated. By the end of the S phase, the cell contains two entire copies of its genetic information. The cell proceeds to G2 phase where the chromosome starts condensing, and structures required for division are formed. A discrete band of microtubules forms around the cytoplasm marking the plane of cell division. At the end of the G2 phase, the cell undergoes another checkpoint: G2/M checkpoint, upon which, if conditions are appropriate, the cell enters M phase in which it divides.
What have the development in the history of metagnonmics contributed to our understanding of?
Answer:
metagenomics offers a powerful lens for viewing the microbial world that has the potential to revolutionize understanding of the entire living of the world
Explanation:
A cell wall is present only in a) Bacteria, b) Protozoa, c) Algae, d) Virus
Answer:
B
Explanation:
Answer:
cell wall
Explanation:
because nothing would be able to protect the cell
A student wants to compare the amounts of CO2 given off by yeast provided
with different amounts of sugar. The student places a balloon over each
container to catch the released CO2. How can the student make quantitative
observations of the CO2 collected in the balloons?
D
Final answer:
To quantitatively observe [tex]CO_2[/tex] collected in balloons, the student can measure the balloon circumference, use a gas pressure sensor, employ a water displacement technique, or weigh the setup to determine mass loss due to gas production.
Explanation:
To make quantitative observations of the [tex]CO_2[/tex] collected in the balloons in an experiment where yeast is provided with different amounts of sugar, the student could use several methods:
Measure the circumference or diameter of the balloon. As more [tex]CO_2[/tex] is produced, the balloon will inflate, and this can be quantified.Use a gas pressure sensor to measure the pressure inside the balloon. This will give a direct measurement of the amount of gas produced.Employ a water displacement method, where the balloon is connected to an inverted measuring cylinder submerged in water, and the amount of water displaced is equivalent to the volume of [tex]CO_2[/tex] produced.Alternatively, after the reaction, weigh the entire setup and calculate the mass loss, which will correlate to the amount of [tex]CO_2[/tex] generated.Remember that the student should ensure that other variables are controlled so that differences in [tex]CO_2[/tex] production are due to the amount of sugar provided and not other factors.
PLS HELP15. Scientists use a system called binomial nomenclature to classify organisms. For example, the
goldfish is known as Carassius auratus. Each of the two names has a different significance.
Which of the following correctly describes the meaning of the two names?
A. Carassius is a distant evolutionary ancestor of the goldfish, while auratus is a more recent
species.
B. Carassius is a group of organisms with similar behavior, while auratus is a group with
similar structures
C. Carassius is a group of organisms with similar external structures, while auratus is a group
with similar internal structures,
D. Carassius is a group of different organisms with similar structures, while auratus is a
smaller group of members that can only breed with another auratus,
Answer:
The correct answer is: d. Carassius is a group of different organisms with similar structures, while auratus is a smaller group of members that can only breed with another auratus.
Explanation:
Carassius signifies the name of genus. In binomial terminology it is the generic name shared by the collection of nearby families. In this case, Carassius is a genus in the family of ray-finned fishes. Auratus signifies the types of the fish and it is detailed exclusive epithet within the type. Carassius is a type in the ray-finned fish family Cyprinidae. Maximum types in this genus are usually identified as crucian carps, however this tenure often precisely denotes to C. carassius. The most well known is the goldfish (C. auratus).
describe how gametogenesis in egg cells is different that that of sperm cells
Answer:
Gametogenesis is the process where a haploid cell is formed from diploid cell. Gametogenesis in male is called Spermatogenesis and gametogenesis in female is called as Oogenesis
Explanation:
⇒The process through which mature sperm or spermatozoa is produced is called as Spermatogenesis and the process through which mature ova or egg is formed is called as Oogenesis.
⇒Spermatogenesis takes approximately 70 days whereas Oogenesis begins prior to birth that is during the foetus period.
⇒Spermatogenesis contain different stages like- Primay spermatocyte, secondary spermatocyte, spermatid and spermatozoa whereas, Oogenesis contain Primary oocyte, Secondary oocyte &first polar body, mature ovum and second polar body.
How do changes in incoming solar radiation contribute to temperature increases
Answer:
The steps most affected by the increase in greenhouse gases are 3. Heat is absorbed by the atmosphere and 4. The atmosphere re-releases heat, warming Earth's surface and lower atmosphere.
Explanation:
4. At which plate boundary is one lithospheric plate
sliding under another?
A) Nazca Plate and Antarctic Plate
B) Pacific Plate and Indian-Australian Plate
C) Indian-Australian Plate and Antarctic Plate
D) Nazca Plate and Pacific Plate
Answer:
B) Pacific Plate and Indian-Australian Plate
Explanation:
In convergent boundaries, one of the involved plates sinks under the other plate in a process known as subduction. The correct option is B. Pacific Plate and Indian-Australian Plate.
Plate boundaries
There are three types of plate boundaries according to the interaction between plates.
Plate boundaries can be either Convergent, divergent, transforming
Convergent BoundaryCollision area between two plates.Two oceanic plates might collide, or one oceanic plate with a continental one.In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices.The thicker and older plate subduces under the other plate.Volcanoes get formed on the superior plate since magma flows over it.Plates's movement might produce earthquakes.
Example
An example of a convergent boundary is the union between the Pacific Plate and Indian-Australian Plate.
The Pacific plate is subducting under the Indian-Australian Plate since it is the oldest and thickest one.
These movements originated the Kermadec Trench and the Tonga and Kermadec island arcs.
The correct option is B) Pacific Plate and Indian-Australian Plate.
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Which of the following is true of an isobaric process
A. Temperature is constant.
B.Q = -u
C. Pressure is constant.
D. W = PV
Answer:
Pressure is constant & W= PV
Explanation:
If you lookat this picture.You can see that temperature is changed...that means internal energy is changed.And you can see pressure is 2atm always...
and also because the volume is incresed we can calculate the work using
W=p∆v
W=2atm*1m^3
So that equation is also true for this system.
Final answer:
The true statement about an isobaric process is that pressure remains constant. It is a thermodynamic process characterized by constant pressure throughout the process.
Explanation:
The correct answer to the question is C. Pressure is constant. An isobaric process is a thermodynamic process during which the pressure remains constant. Thus, when a gas undergoes an isobaric process and does work on a piston, as in Figure 1, the work done by the gas can be represented by the equation W = PΔV, where P is the constant pressure and ΔV is the change in volume of the gas. This process should not be confused with an isothermal process, where temperature remains constant, or an adiabatic process, where no heat is transferred between the system and its surroundings.
What would be the answer for this question?(Biology)
Cell theory states that all living things contain one or more cells. Why do you think cell theory meets the definition of
a scientific theory? Do you think it should be a scientific law? Explain your response.
Answer:
The correct answer is "yes it satisfies the definition of the scientific law"
Explanation:
The scientific theory states the verified explanation of the natural world. This things or the experiments can be determined by repeatedly testing by the given scientific methods. The cell theory also meets the definition of the very known scientific theory as it has also helped in determining it by various experiments as well as the observations. The cell can be studied under the microscope by the basic staining procedures that has already been mentioned in the theory.
Answer:
Cell theory meets the definition of a theory because it has been tested over a long period of time, and scientists have plenty of evidence to support this theory. However, it doesn’t seem to meet the criterion of a scientific law. Scientists only know about life on this planet, so the theory may not be universal if life is found on other planets. In addition, scientists don’t have much data on the earliest forms of life on Earth.
Explanation:
The unit “GtC” is used throughout the lab and stands for gigatonnes of carbon. What is one GtC equal to?
A: one billion kilograms of carbon
B: one hundred kilograms of carbon
C: one thousand kilograms of carbon
D: one trillion kilograms of carbon
Answer:
B
Explanation:
The unit “GtC” is used throughout the lab and stands for gigatonnes of carbon. In this, one GtC is equal to one trillion kilograms of carbon. Thus, the correct option is D.
What is unit conversion?Unit conversion is a multi-step process which involves multiplication or division of a number by a numerical factor. There are different ways to measure the weight, distance, and temperature of a substance. In several countries, distance is measured in kilometers, weight in kilograms, and temperature is measured in units of celsius.
In order to have accuracy and avoid confusion in the measurements, we need to convert one unit to another unit. For instance, we do not measure the length of a pencil in the kilometers. In such a case, one has to convert the unit from kilometer (km) to centimeter (cm).
1 GtC = 1 billion tonnes
1 billion tonnes = 1 trillion kilograms
1 GtC = 1 trillion kilograms
Therefore, the correct option is D.
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Question 15 (1 point)
Theme: Life depends on interactions within and between systems.
Emergent properties are the result of interactions between the components of a
system. Systems biology models the complex behavior of biological systems. A heart,
arteries, and veins by themselves can't do anything, but if they are assembled in a
body, they can pump blood. What does this illustrate?
a) Evolution by natural selection
b) An emergent property
c) The one-way flow of energy in ecosystems
d) The universal genetic code of life
The given scenario illustrates An emergent property.
Explanation:
A property that explains about the functioning of any system as a whole is an emergent property. The units of that individual system will not work to give the functionality of the entire system. Fallacy of division occurs when there is a failure in the realization of this emergent property.
For instance let us take an ant colony. Ant as a single organism will not be able to attain certain works. While when they join to form a colony they together can accomplish complex and tedious tasks. Hence, in human body also cells of heart acts as an example of an emergent property as they together can accomplish the function.
Wildebeest and red-billed quelea engage in resource partitioning, where each uses a different
part of the grass. Explain how this works.
Answer:
In an environment where resources such as food are being depleted, organisms within a species and organisms belonging to different species need to find a way in which they can coexist and survive in the environment. This is done by the organisms so in order to avoid competition. Resource partitioning is a method that organisms use for survival by dividing their resources so that there is lesser competition.
The wildebeest and the red-billed quelea are also using this phenomenon in order to survive. They have divided their part of the grass so that there is lesser competition and both of the species are able to coexist.
What happens if the enzyme temperature was decreased.
Answer:
enzymes died slowly when temperature reduces
how is mitosis different in plants and animals
Answer: The most important and observable difference in the plant animal cells mitosis is the cytokinesis.
Explanation: The most important and observable difference in the plant animal cells mitosis is the cytokinesis. In plants a new cell plate is formed between the daughter cells for the future cell wall, while in animal cells the cell membrane constricts to separates the parent cell into daughter cells.on:
HELP MEEEEE it’s due today
Answer
During osmosis, solvent particles move from an area of higher concentration to an area of lower concentration. When there is higher concentration of solvent particles inside the cell, most solvent particles will move out of the cell and the cell will shrink. When there is higher concentration of solvent particles outside the cell, most solvent particles will move in the cell and the cell will become turgid.
Explanation:
Osmosis can be described as the process by which water molecules move along a concentration gradient form an area of higher concentration to an area of lower concentration. When water molecules move out of the cell, the cell will shrink. When the water molecules move inside the cell, the cell will gown and become turgid. Osmosis is a kind of passive transport.
What is natural selection?
a process that selects variations that help with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
a process that causes random variations to appear in the offspring of every generation
Answer:
The answer to this question should be the first option. A process that selects variations that help with survival and that spreads the variations to more offspring
Answer:
The correct answer is a process that selects variations that help with survival and that spreads the variations to more offspring.
Explanation:
Natural selection is a phenomenon proposed by Charles Darwin 140 years ago. From its definition the theory of evolution is born.
This process occurs between entities with variation, inheritance and multiplication and the different evolutionary formations that give way to new species through survival and reproduction.
In summary, natural selection is the process of formation of living beings so that they can survive and develop.
Can DNA be replicated while the DNA is twisted in its double helix?
Answer:
The double-helix shape allows for DNA replication and protein synthesis to occur. In these processes, the twisted DNA unwinds and opens to allow a copy of the DNA to be made. In DNA replication, the double helix unwinds and each separated strand is used to synthesize a new strand.
Explanation:
Which is the first step in the fusion process?
Answer:
Option C would be the correct one.
Explanation:
Answer:
C is the correct option
Explanation:
A test tube fell on the floor and broke! What would you do? Check all that apply.
Call 911.
Using your hands, carefully pick up the broken test tube and dispose of the broken glass appropriately.
Tell your teacher right away.
Try to recover the mystery food solution from the broken pieces so you can continue to test it.
Answer:
tell the teacher right away!!
Answer:
using hands CAREFULLY pick up broken pieces
tell teacher right away
What is the theory of plate tectonics? Explain this scientific theory, making sure to include the following terms in your response: Pangaea, continental drift, convection, gravity. Use 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words.
Answer:
Plate tectonics is a scientific theory that explains how seven continents are formed. Around 240 million years ago, all these continents were together in the form of a super-continent (called as pangaea). However, due to convection (circular motion of molten material inside Earth) and gravity, supercontinent started breaking apart. These parts started moving away from each other leading to the continental drift.