1) the S-phase before mitosis nd meiosis
2) the number of chromosomes only doubles when two haploid gametes form to produce a diploid zygote. for example: in humans, the sperm cells and eggs have 23 chromosomes , which is the haploid number
How do hurricanes form?
Hurricanes form as a result of rising warm water and circulating winds.
hope this helps >.<
Semret is walking across a balance beam. Which part of his brain is helping him stay balanced? cerebrum cerebellum brain stem
Answer:
The correct answer is cerebellum. This part of your brain controls balance.
Explanation:
Odyssey
How did the hydraulic jack help Neil do his job? A. It decreased the force of gravity on the pallet. B. It increased the force he could use to lift the pallet. C. It decreased the distance over which he had to move the pallet. D. In increased the force he could use to push the pallet. Reset Submit
The answer is B. His force was multiplied several folds by the hydraulic jack so he was able to lift the pallet, with less effort. Hydraulic lifts work on the principle of P = FA and that P1 = P2. If the area of the lifting cylinder is greater than that of the cylinder on which the effort is applied, the potential output at the bigger lifting cylinder is greater compared to that applied.
what is the average salinity of ocean water 34.5 g/kg 0.345 g/kg 345 g/ml 3.45 g/kg
Other carotenoids include zeaxanthin and ____________ , two important components of the macula that help maintain eye health.
People with type o blood are universal donors but can only receive blood form other type o donors
Answer:
O donors can donate to other type
Explanation: the reason is that O type blood can donate to type A, B, AB and O is Compatible to other type of blood - but Kidney transplants need the same type of blood.
Type O individuals are universal donors and can donate to any blood type due to the absence of A and B antigens on their RBCs, but they can only receive type O blood. Type AB individuals can receive blood from any ABO type, making them universal recipients. The Rh factor also plays a critical role in the compatibility of blood transfusions.
Explanation:The compatibility of blood types between donors and recipients is crucial for safe blood transfusions. People with type O blood are often referred to as universal donors because their red blood cells (RBCs) do not have A or B antigens, making their blood compatible with all other blood types in emergencies. Nonetheless, they can only receive blood from other type O donors due to the presence of both anti-A and anti-B antibodies in their plasma. Conversely, individuals with type AB blood are called universal recipients; they can receive blood from any ABO blood type since they do not have anti-A or anti-B antibodies.
The Rh factor is also an important consideration in blood donations. For instance, a person with type O negative blood is considered a universal donor beyond the ABO blood group system, as they can donate to any blood type regardless of the recipient's Rh factor. The discovery of ABO blood groups by Karl Landsteiner allows for safe blood transfusion practices, ensuring blood compatibility and avoiding transfusion reactions.
Which statement about vacuoles is true
how is one molecule of ATP formed from one molecule of ADP
Which connects neurons and what chemicals help neurons communicate
An increase in food and a decrease in predators would most likely genetic variation in a population
An increase in food and a decrease in predators would most likely genetic variation in a population and the growth of the population is slow.
What is population density?The average number of individuals per unit area in a population is known as population density. For the calculation of population density, the formula is population density which is denoted by D equals the number of people denoted by N divided by area per cubic kilometers denoted by S. Therefore, D= N/A.
The use of the calculation of the population density is for the estimation of the population in a particular area. The factors affecting population density are an increase in the number of predators, food, and water sources, a decrease in the living area, and climatic changes.
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which structure is part of the cell's skeleton
Explain the role of the digestive, endocrine, and excretory systems in maintaining homeostasis.
The digestive system maintains homeostasis by creating the proper pH balance in the gastric environment. In addition, by maintaining the correct enzyme ratio, the digestive system nurtures beneficial bacteria that inhibit disease and produce biological substances the body needs such as vitamin K.
Homeostasis is the balance the body maintains to continue to function properly. All the bodily systems, including the digestive system, contribute to homeostasis. The body maintains homeostasis using both positive and negative mechanisms. Negative feedback occurs when the body senses an imbalance, and the various systems work to counterbalance and restore proper equilibrium. Positive feedback happens when the body senses a change and works to enhance it.
The digestive, endocrine, and excretory systems play crucial roles in maintaining homeostasis, which is the balanced and stable internal environment required for optimal bodily function.
What is the role of food breakdown in maintaining homeostasis?The digestive system is responsible for breaking down food into nutrients that can be used by the body, and eliminating waste products. It plays a key role in maintaining homeostasis by regulating the absorption and distribution of nutrients, as well as removing waste and toxins from the body.
The endocrine system is responsible for producing and releasing hormones, which act as chemical messengers that regulate various bodily functions.
Hormones are involved in a wide range of processes that help maintain homeostasis, including regulating metabolism, controlling blood sugar levels, and maintaining fluid balance.
The excretory system is responsible for removing waste products from the body, including excess water, salts, and metabolic waste products such as urea.
This system plays a key role in maintaining homeostasis by regulating the concentration of electrolytes and other substances in the body fluids, as well as regulating fluid balance and blood pressure.
Overall, the digestive, endocrine, and excretory systems work together to maintain homeostasis by regulating the intake, processing, and elimination of nutrients and waste products, and by ensuring that hormones and other chemical messengers are released in the right amounts to regulate bodily functions.
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3 ways rna differs from dna
RNA differs from DNA in being single-stranded, containing the sugar ribose instead of deoxyribose, and having the base uracil instead of thymine.
In biology, RNA and DNA are both crucial nucleic acids that differ in several important ways:
Single-Stranded vs. Double-Stranded: RNA is typically single-stranded, whereas DNA is double-stranded, forming a double helix structure.Ribose vs. Deoxyribose: RNA contains the sugar ribose, while DNA contains deoxyribose, which lacks an oxygen atom compared to ribose.Uracil vs. Thymine: RNA has the base uracil (U) instead of thymine (T), which pairs with adenine (A) in RNA just as thymine pairs with adenine in DNA.These differences play crucial roles in their respective functions in genetic information storage and protein synthesis.
Which of the following evidence changed the theory of plate tectonics? Age of rocks and mountains Fossils Magnetism Size and shape of continents
¿Que sucede cuando se carga un cuerpo por induccion electrostatica?
A) al poner contacto un cuerpo cargado positivamente con otro nuetro, pasarán electrones del neutro positivo. Ambos quedarán pegados positivamente.
B) al poner en contacto un cuerpo cargado positivamente con otro neutro, pasarán electrones del positivo al neutro. El neutro quedara cargado negativamente y el posotivo seguirá cargado positivamente
C) al poner en contacto un cuerpo cargado positivamente con otro neutro, pasarán protones de neutro al posotivo. El neutro quedará cargado negativamente y el positivo seguirá cargado positivamente.
D) al poner en contacto un cuerpo cargado positivamente con otro neutro, pasarán protones del positivo al neutro. Ambos quedarán cargados positivamente.
write the dna complementary strand for GGCATTCGCGATCATG
Nucleic acids are polynucleotides of very high molecular masses in which the nucleotide units are linked through phosphate ester linkages. DNA is one of the nucleic acids. The DNA complementary strand for GGCATTCGCGATCATG is CCGTAAGCGCTAGTAC.
What is DNA?In deoxyribonucleic acid or DNA, the sugar unit present is 2-deoxy- D -ribose. The heterocyclic nitrogenous bases present in DNA are Adenine (A), Guanine (G), Cytosine (C) and thymine (T). The first two are purines while the next two are pyrimidines.
The DNA molecule consists of two strands of polynucleotide chains coiled around each other about a common axis in the form of a right handed double helix. The nucleotides are connected by phosphodiester bonds.
The base pairing in DNA occurs in such a way that Adenine pairs with thymine and Guanine pairs with Cytosine. This is called base complementarity.
Thus the complementary strand is CCGTAAGCGCTAGTAC.
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another Punnett square that shows a cross between a heterozygous red bull (Rr) and a heterozygous red cow (Rr). Determine the ratios of the genotypes and phenotypes for hair color resulting from this cross
Answer:
The proportions of genotype and phenotype for this cross are:
50% Rr = color color determined by the dominant (red) allele.
25% RR = Color coloring determined by the dominant allele (red).
25% rr = Coloration of the color determined by the recessive allele.
Explanation:
As you can see in the image attached below, the cross between a red ox (Rr) and a red cow (Rr) would result in an offspring composed of 50% of individuals with the Rr alleles, 25% of individuals with the RR alleles and 25% of individuals with the rr allele.
As the ox and cow that are the parents are red, we can confirm that this is the phenotype presented by the dominant allele. This is because heterozygous individuals, such as the progenitors of that crossing, present the phenotype determined by the dominant allele, since the recessive alleles are inhibited when together with a dominant allele.
For this reason, we can say that within the offspring, those individuals with the "RR" and "Rr" alleles will have a red color, which is shown by the dominant allele. Individuals who have the "rr" alleles, on the other hand, will have the color determined by the recessive allele.
In which city will the sun set?
Which good, once consumed by an individual doesn’t, reduce the ability of another individual to consume it?
Answer:
Public good
Explanation:
Public goods are those that belong to legal entities governed by Public Law, namely, the Federal Government, the Federal District, Municipalities, Municipalities and Public Foundations. Common goods are goods held by the taxes paid to the population and are therefore available to all citizens unlimitedly, ie when an individual consumes a public good, it does not reduce the ability of another individual to use it either.
Public goods are goods that are intended for general use by the community (such as streets and roads), are goods that are intended for the performance of administrative services and public services in general (such as a building where it is installed a public hospital or a public school) and are those which, although constituting public property, do not have a specific public destination or specific administrative purpose (eg, public buildings that are disabled).
50 points if you answer right
In a monohybrid cross, if the gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, what would be the predicted result of crossing two intermediate (Tt) parent plants? (Hint: You may want to complete a Punnett square.) 25 percent tall, 50 percent intermediate, 25 percent short 50 percent tall, 25 percent intermediate, 25 percent short 100 percent intermediate 25 percent tall, 75 percent intermediate
In a monohybrid cross, if gene for tall (T) plants was incompletely dominant over the gene for short (t) plants, it will give plants with intermediate tall (Tt) in first filial (F1) generation. When the F1 offspring consisting of all intermediate tall are allowed to cross, the resulting (F2) offspring consist of all three phenotypes [25% tall (TT): 50% intermediate tall (Tt): 25% short (tt)]. The phenotypic ratio is 1:2:1.
Why a lunar eclipse does not occur for every full moon during the year; explain please
What tool is used to track inherited traits between parents and offspring?And be specific HURRY!
Answer:
It is called pedigree chart
Explanation:
Diego hypothesizes that the Earth wobbles on its axis in a pattern that is repeated every 20,000 years.
Which of the following ways would be the best way to test Diego's hypothesis?
A.conduct a controlled experiment
B. Observe the movement of other experiments
C. Make observations in nature
D. Make a model
THE ANSWER IS: Make a model
Different scientific questions and hypotheses require different types of scientific investigations. Some questions can be answered through controlled experiments. Other questions can be answered through collecting specimens, building models, and/or making observations.
For example, questions about events that occur over thousands of years are best studied through models.
One parent mouse has white fur (bb). The other parent mouse has black fur. Some of the offspring produced from their cross have white fur. What genetic makeup did this parent with black fur have in order to produce some offspring with white fur? explain it to please :)
The mouse parent probably had a genetic makeup of Bb meaning that there is a gene of the white hair within their own genes of a dominate black hair. Since the white hair mouse had a complete recessive gene makeup of white hair and black hair is dominate in this situation the only genetic makeup that would work would have to be dominate recessive for the dominate gene is the one that shows but that mouse parent cannot be completely dominate or there would be no white haired offspring
In a deciduous forest ecosystem, a white-tailed deer eats tree leaves while a Cooper’s hawk hunts a downy woodpecker. In the ground, earthworms break down leaves. The Cooper’s hawk is classified as a A producer B decomposer C parasite D consumer
Answer: Consumer
Explanation:
Consumers are the organism that feed on the producers for their energy source.
The producers are the green plants that make food by the help of the process known as photosynthesis.
The consumers feed on the plants for their energy need(primary consumers).The animals that feed on small animals for their energy needs are known as secondary consumers.
Here, the hawk feed on woodpecker so it is secondary consumer.
In the diastole phase of the cardiac cycle what is the correct direction of the flow of blood
Out of the heart and to the arteries.
Which of the following is necessary for glycolysis to begin? Water, ATP, Carbon dioxide, none of the above.
Glycolysis, a metabolic process requiring ATP, begins with the investment of two ATP molecules to break down a glucose molecule and ultimately creates a net gain of two ATP molecules.
Explanation:Among the options provided in the question, ATP (Adenosine TriPhosphate) is necessary for glycolysis to begin. Glycolysis is the metabolic process in which glucose is broken down to produce energy. Glycolysis begins with the investment of two ATP molecules. The process starts when a glucose molecule is phosphorylated by an ATP molecule, which then turns into ADP (Adenosine DiPhosphate). As the process continues, it produces a total of four ATP molecules, yielding a net gain of two ATPs.
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What causes might create a disturbed rock layer?
Final answer:
Disturbed rock layers can be caused by decreased water content, freezing and thawing, plant growth, animal activity, removal of overlying pressure, and seismic activity. These factors can weaken the rock structure and lead to geological events such as landslides.
Explanation:
Several factors can lead to a disturbed rock layer, affecting its structure and stability.
A decrease in water content, particularly in clean sand deposits, reduces the strength of the grains, making them susceptible to failure. This can be caused by a general drying out of the area or by human activities that lower the water table.
Freezing and thawing cycles resulting in physical weathering are common in cold climates. This process can expand and contract rocks, eventually leading to rockfalls and other forms of mass wasting.
Vegetation growth and animal activity, such as the expansion of plant roots and burrowing, can physically disrupt rock formations.
The removal of overlying pressure, either by natural erosion or human activities like mining, can cause underlying rock to expand and fracture.
Chemical weathering from the formation of salt crystals and other processes can break down the integrity of rock layers.
Seismic activity, like earthquakes, or even vibrations from traffic and construction, can significantly disturb and weaken rock layers.
Collectively, these factors contribute to shaping the earth's surface, influencing geological events like landslides, and causing the formation of features such as fractured rock layers, tilted or folded beds, and even faults in the earth's crust.
which of these statements is true?
A. RNA codes for DNA which codes for proteins
B. DNA codes for proteins which codes for RNA
C. DNA codes for RNA which codes for proteins
D. RNA codes for proteins which code for RNA
I WILL GIVE 41 POINTS!
Answer:
DNA codes for RNA which codes for proteins
Explanation:
Southern Italy is very close to the border of two tectonic plates. Which of these facts is most directly related to the closeness of the plate boundary? A. Many people like to vacation in Italy.
B. The climate in Italy is warm and temperate.
C. Italy has experienced many earthquakes.
D. Italy has many miles of coastline.
The correct answer is option C, Italy has experienced many earthquakes.
According to the theory of plate tectonics, Earth is an active planet. Its surface comprises various individual plates, which interact and move, continuously modifying and reshaping the outer layer of the Earth. Volcanoes and earthquakes both are the outcomes of the movement of tectonic plates.
Earthquakes take place on faults, strike-slip earthquakes take place on strike-slip faults, usual earthquakes take place on normal faults, and thrust earthquakes take place on reverse or thrust faults. When an earthquake takes place on one of these faults, the rock on one end of the fault slips in relation to the other.