With each cell cycle (in mitosis), the total number of cells:
a) increases by 1
b) decreases by 2
c) doubles
d) halves​

Answer: D. year

Explanation:

The earth revolves around the sun. The Earth will take 365 days ( a year) to complete a full revolution.

Answer:

The answer is D. Year

Freshwater ecosystem examples are lakes, rivers, ponds, springs, wetlands and streams.

C) evaporate off the water

Answer:

1. c

2. a

3. d

4. c

5. b

6. a

7. a

8. c

9. d

10. c

11. a

12. b

13. d

14. d

Explanation:

Answer:

D. Organism A and Organism B share more structural characteristics with one another than they do with Organism C.

Explanation:

Despite all three organisms being chordates, thus animals that have spines and bone structure, further into the phylogenetic tree they have evolved much differently, with A and B being mammals, while C being a type of bird.

Organisms A and B will have much more things in common, especially when it comes to the basic bone structure, and certain traits that define them as mammals, even if we are talking about a whale and a bat. Organism C on the other hand, will have much different structural features, used for different things, or even for the same ones but developed in a different manner.

Answer:D.

Organism A and Organism B share more structural characteristics with one another than they do with Organism C.

Explanation:

Answer:

AUA

Explanation:

Thiamine pairs with Adenine. However, in mRNA, the Thiamine base does not exist. It is replaced by Uracil. Therefore, instead of the A in the DNA strand pairing with a T, it pairs with a U on the mRNA.

The DNA sequence that reads TAT gives rise to an mRNA codon that corresponds to the amino acid tyrosine

Explanation:

According to the central dogma of life the DNA gets transcribed to RNA which gets translated to the protein, the protein is the ultimate macromolecules that helps in the metabolic activities of the human, an important aspect of this process is that not all DNA is converted into RNA similarly not all RNA is converted to protein, only the mRNA is converted to the protein based on a degenerative codon mechanism.

the answer for this question is the distance of the star from sun using parallax method

Answer:

The correct answer will be option the distance of the star from Sun using parallax method.

Explanation:

Parallax method or trigonometric parallax is a method of measuring the distance of nearby stars in space on the basis of displacement of stars against the background.

Since a student observes the position of the star in summer and then after 6 months in winter, star changes its position or displaces which can be measured by the student along with measuring parallax angle and drawing a baseline from the Sun as Earth revolves in orbit around the Sun. So by using the parallax method and the formula he can easily determine the distance from the Sun.

Thus, the distance of the star from Sun using the parallax method is the correct answer.

Answer:

the answer is: an inequality

Organisms that can transform unusable nitrogen in the atmosphere into chemical compounds containing nitrogen that can be used by other organisms.

Answer and Explanation:

Theses are symbiotic bacteria found in root nodules of leguminous plants that are able to convert atmospheric nitrogen into ammonium compounds. The symbiotic microorganisms are bacteria of the genus Rhizobium. Nitrogen fixation involves two processes; biological and non-biological nitrogen fixation. Biological nitrogen fixation is carried out by symbiotic and free living microorganisms.

Answer: yes

Explanation: the sex of the dog is a male the gender of the dog is male

yes!

sex is another word for gender, on your license your gender will be labeled as "sex"

Answer:

Independent Variable: temperature

dependent variable: chirps

Hypothesis: the lower the temperatures the less chirps

constants: temperature or food and water

repeated trails: success and failure

control:the experiment

Answer:

c. Ants protect a tree on which they feed.

Explanation:

Answer:

Absorption of water from soil

Explanation:

That's what the roots do :)

Absorption of water from soil  is not a function of the stem of a plant.

In botany, the stem is the axis of the plant that produces leaves, buds, and shoots that terminate in roots. The stem transports nutrients, water, and minerals to other plant parts. It can also store nutrients, and green stems can even manufacture their own food.

The principal vertical stalk in most plants is the stem, though it can vary in appearance and resemblance to other plant parts (e.g., underground stems may look like roots).

The stem's main jobs are to support the leaves, carry nutrients and water to the leaves so that photosynthesis can turn them into useful substances, and then carry those substances from the leaves to other sections of the plant, including the roots.

Therefore, Absorption of water from soil  is not a function of the stem of a plant.

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Answer:

fragmentation

Explanation:

The correct answer is All of the above

Explanation:

Algae include multiple organisms that are mainly classified as eukaryotic and rely on photosynthesis like plants, although they are quite different from plants. In terms of reproduction, algae can reproduce in many ways depending on the sécies, this includes asexual reproduction that occurs through fission in which cells divide into two or more cells to reproduce; fragmentation in which the algae breaks into different fragments and each of these is able to form a new complete individual and also, algae can reproduce through sexual reproduction which means there are female and male gametes involved. According to this, it can be concluded algae can reproduce by all of the above (fission, sexual reproduction, and fragmentation).

This process is called melting. When a solid melts, it turns into a liquid.

Melting is a process in which a solid gets converted into liquid. This occurs due to the presence of heat in the surrounding environment.

The correct option is:

option C. Melting

The following cannot be the correct options because:

Therefore, when the glass of water with ice cubes is kept outside it will melt and becomes warm due to the transfer of heat.

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Answer:

The Answer Is C

Explanation:

Final answer:

The validity of the paper towel experiment is supported by consistent setup, methodological uniformity, reproducibility, and sufficient sample size. Assuming these criteria were met, the findings suggesting Bounty as the strongest brand is likely valid. Moreover, consistency and controlled conditions are critical for reliable scientific results in various experiments.

Explanation:

To ascertain the validity of the test results from Mrs. Smith's class experiment, one must consider certain criteria. Several factors contribute to the validity of the paper towel brand strength experiment:

Considering the information provided, we can assume the experiment was valid if these factors were followed. If all students reported Bounty as the strongest, and if the experiment was conducted under standardized and replicable conditions, this indicates a high likelihood of validity in the findings.

Furthermore, the experiments with the populations of beads, DNA amounts from fruits, airflow tests, and the force standards involving rubber bands also emphasize the importance of controlled conditions, replication, and accurate measurement to establish validity in experimental results. The phrase, 'Which experiment had the correct results? They both did. The job of the statistician is to see through the variability and draw appropriate conclusions'', suggests that multiple consistent outcomes lead to valid conclusions in scientific inquiry.

A zebra migrates to join a different herd of zebras.

    This would lead to biodiversity in the new zebra herd.

Competition for sunlight leads to taller trees.

    Taller trees would prosper, and shorter trees would die out. Trees would continuously evolve to be larger.

The DNA of a snake changes to make its venom stronger.

    This mutation created biodiversity and favoritism in natural selection. The trait will more likely be passed on.

A grassfire randomly sweeps through a population of buffalo and kills most of the animals.

    Only the strongest Buffalo survived, decreasing competition strengthening the gene pool.

Answer:

Genetic variation as it is an important factor causes evolution by increasing or decreasing the frequency of alleles in a particular population through the process of natural selection.

On the basis of knowledge about genetic variation, we can conclude that-

1st example -  Increase in gene pool of zebra.

2nd example - Decrease in gene pool of trees.

3rd example - Increase  the gene pool of snakes.

4th example - Decrease  of gene pool of buffalo.

Answer:

i think it's passive

Explanation:

Passive immunity is provided when a person is given antibodies to a disease rather than producing them through his or her own immune system.

Final answer:

Tina has active immunity against measles, which she acquired through vaccination. This has prepared her immune system to fight off future exposure to the measles virus, ensuring she is protected against the disease.

Explanation:

Tina has received active immunity against measles. Active immunity occurs when the immune system is exposed to a pathogen or parts of a pathogen and develops its own antibodies in response. Vaccinations, like the MMR vaccine which stands for measles, mumps, and rubella, introduce a weakened or dead form of the pathogen into the body without causing illness.

This stimulates the body's adaptive immune response to produce antibodies, providing long-lasting protection against these diseases. Tina's body will now have the memory to recognize and effectively fight off the measles virus should she be exposed to it in the future, thanks to the process initiated by the vaccine.

Rinderpest disease is caused by a virus that affects hoofed animals, including cattle and wildebeest. In the 1950s, a cattle vaccination program was implemented to eradicate the disease in the Serengeti, and this led to dramatic changes in the populations of wildebeest and other species. The figure shows the number of wildebeest in the Serengeti ecosystem (shaded circles, left y-axis) and the prevalence (i.e., percentage) of individuals infected by rinderpest disease (unshaded squares and triangles, right y-axis) from 1958 to 2003.

Answer:

Explanation: At the molecular level, the universal genetic code and homologous molecules provide evidence of common descent.

Final answer:

Molecular biology can be used to trace the process of evolution by analyzing the molecules and DNA found in living things. Molecular clocks calculate differences in DNA sequences to determine relatedness and divergence time. Molecular biology provides features that reflect evolutionary lineage and ancestral relationships.

Explanation:

Molecular biology can be used to trace the process of evolution by analyzing the molecules and DNA found in living things. Scientists use molecular clocks, which calculate the number of differences in DNA sequences or amino acid sequences between species, to determine how closely related they are and when they diverged from a common ancestor. The fewer differences, the more recently two species split and began to evolve separately. Molecular biology also provides characteristics that are unlikely to be shaped by natural selection, allowing researchers to trace ancestry based on shared features.

Answer:

Ancestors

Explanation:

Ancestors because it says etc. meaning more that just parents, parents of parents.

Hope this helps! :)

The term 'parents' refers to individuals who are responsible for the care and upbringing of their children. This term can also extend to grandparents or extended family members in cases where they take up the role of the primary caregiver. In genetics, 'parents' also refer to organisms contributing genetic material to offspring.

The term 'parents' is commonly used in a social or familial context to refer to individuals who have offspring either biologically, through adoption, or through other familial relationships. They are responsible for the upbringing and care of their children.

'Parents' in a wider context can also include 'parents of parents', often referred to as grandparents who, in many cultures, play a crucial role in a child's upbringing. In certain circumstances, these grandparents may take on the role of primary caregivers, effectively becoming parents themselves.

Beyond direct parenting, there are several forms of family structures, including single-parent families, blended families (where there are step-parents and/or step-siblings), and extended families, where others like aunts, uncles, cousins also play significant roles in a child's upbringing.

Additionally, in genetic terms, the term 'parents' is used to describe individual organisms that contribute genetic material to create offspring. This biological concept of parents exists parallel to, and distinct from, social and legal aspects of parenthood.

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Answer:

B

Explanation:

Photosynthesis only takes place in the light, while cellular respiration takes place in the light and dark.

https://youtu.be/xmfhKbmQhq0

Photosynthesis vs. Cellular Respiration Comparison

Answer:

Photosynthesis only takes place in the light, while cellular respiration takes place in the light and dark.

Explanation:

I found this really cool table of comparison, and second from the bottom it shows that Photosynthesis requires light while cellular respiration does not. This means it can occur in the light or dark (:

Answer:

c. temperature of the gas

Explanation:

According to Bernoulli, in the kinetic theory the pressure of a gas is the consequence of the impacts of the particles of the gas towards the walls of the container in which it is located.

In the expressions PV = k T and P = m (v2) / 3V. If these two equations refer to the same reality, then kT = m (v2) / 3. From here we can say that the temperature of a gas, T = 2 / (3k) m (v2) / 2 is proportional to the average kinetic energy of its molecules.

Answer:

silver, copper, gold, aluminum, iron, steel, brass.

Answer:

copper, brass, gold, aluminum, iron, steel, and silver.

Explanation:

i hope this helps ;)

Answer:

Reproducible

Explanation:

A conclusion of an experiment is accepted by scientific community when the same results can be obtained by repetition of experiment. Reproducible nature of results makes them scientifically acceptable. If the same result of an experiment cannot be obtained by some other scientists, the conclusion is considered to be affected by handling errors and other chance factors.

For a conclusion to be accepted by the scientific community, the data must be accurate, free from error, and reproducible.

In order for a conclusion to be accepted by the scientific community, the data must be accurate, free from error, and reproducible. These criteria are essential to ensure the reliability and validity of scientific findings. Accuracy means that the data reflects the true value or state of the phenomenon being studied. Freedom from error ensures that the data is not influenced by any measurement or sampling errors. Reproducibility means that the experiment or study can be repeated by other scientists and they would obtain similar results.

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Answer:

C. Six molecules of carbon dioxide plus six molecules of water plus light energy converts to six molecules of oxygen plus sugar.

Explanation:

Photosynthesis is the process in which green plants manufacture their food in the presence of carbondioxide and water using light energy. The product of photosynthesis is usually sugar and oxygen gas.

The equation is given below:

6CO₂ + 6H₂O + light energy ⇒C₆H₁₂O₆ + 6O₂

sugar

This is the equation of photosynthesis. Photosynthesis is used by green plants which are autotrophs to manufacture their food.

"The correct option is C. Six molecules of carbon dioxide plus six molecules of water plus light energy converts to six molecules of oxygen plus sugar.

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy in the form of glucose (sugar). The overall chemical equation for photosynthesis can be written as follows:

[tex]\[ 6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2 \][/tex]

This equation shows that six molecules of carbon dioxide (COa‚) react with six molecules of water (HaO) in the presence of light energy to produce one molecule of glucose (C₆Hâ‚â‚‚O₆) and six molecules of oxygen (Oâ‚‚).

Let's analyze the options given:

A. This option incorrectly suggests that sugar is a reactant rather than a product.

B. This option incorrectly includes hydrogen (Hâ‚‚) as a reactant and omits carbon dioxide (COâ‚‚).

D. This option incorrectly suggests that oxygen (Oâ‚‚) is a reactant rather than a product and omits carbon dioxide (COâ‚‚).

Option C correctly identifies the reactants as carbon dioxide (COâ‚‚) and water (Hâ‚‚O), and the products as oxygen (Oâ‚‚) and glucose (sugar), with light energy being the driving force for the reaction."

Answer:

True

Explanation:

Allele frequency as the name says, basically indicates the relative frequency of a particular allele at a particular locus. This is mostly expressed in the form of percentage or fraction.

The formula for calculating it is:

          Allele frequency = no. of copies of allele at a particular location / total no. of all alleles for a gene in a population.

According to Hardy Weinberg theorem, if a population has constant allele frequency from one generation to another, it means that the population is evolving. So, as indicated in question that allele frequency is changing, it means that population is evolving.

Hope it helps!

True, the shift in the allele frequency of d from 0.49 to 0.64 over successive generations in a population of peppered moths indicates that this population is not at equilibrium. The change in coloration, as a result of industrial soot affecting the environment, led to the rise in frequency of the darker moths as they had a higher survival rate. This change in allele frequency is an indication of evolution, as stated by Hardy-Weinberg principle.

True, this population is indeed evolving. The shift in the allele frequency from 0.49 to 0.64 in successive generations of peppered moths indicates that this population is not at equilibrium, hence it is evolving. This evolution occurs in response to changes in the environment that affect the survival and reproduction of the moths, a process referred to as natural selection.

The classic example provided by the peppered moth during the Industrial Revolution in England illustrates this. Prior to the onset of industrial factories, the moth population were predominately light in color, an advantageous trait that allowed them to blend into their surroundings of light-colored trees and lichens. However, the industrial soot emitted from the factories darkened the trees, rendering the light-colored moths more easily spotted by predatory birds. Consequently, the moths with the darker or 'melanic' form had higher survival rates as they were better adapted to the new, darker environmental conditions, hence increasing in frequency.

According to Hardy-Weinberg principle, if the frequencies of alleles or genotypes deviate from the value expected, then this indicates that the population is indeed evolving, as is the case here.

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The arteries (red) carry oxygen and nutrients away from your heart, to your body's tissues. The veins (blue) take oxygen-poor blood back to the heart.

Increases in peripheral resistance, blood volume, and cardiac output result in higher blood pressure. Conversely decreases in any of these factors lead to lower blood pressure. Three main sources of peripheral resistance: Blood vessel diameter, blood viscosity, and total vessel length.

Cardiovascular Response to Exercise. As muscles begin exercising, the arterioles serving the muscle dilate to provide more blood flow. However, arterial pressure does not decrease because other parts of the cardiovascular system are adjusted to support the increased blood flow to the muscles.

Hope this helps :)

Final answer:

While running, a person's body increases blood flow to support increased oxygen and nutrient demands. The average radii of blood vessels increase, and the viscosity of the blood decreases to facilitate this. These changes enhance the delivery of oxygenated blood to active muscles.

Explanation:

When a person is running, the body's demand for oxygen and nutrients increases sharply. This demand is met by the cardiovascular system, which adjusts by increasing blood flow. During vigorous exercise such as running, the heart rate and blood pressure rise to pump more blood through the body. Additionally, there are changes at the microvascular level, where the arterioles and capillaries dilate—a process known as vasodilation. This increases the radius of the blood vessels, thereby reducing the resistance to blood flow. According to the principles of fluid dynamics, blood flow (Q) is directly proportional to the fourth power of the vessel radius (r) as per the formula Q = πr^4ΔP/8ηl, where ΔP is the pressure difference, η is the viscosity, and l is the length of the vessel. Therefore, during running, the average radii of blood vessels increases to accommodate the increased blood flow, which can be up to 10 times the resting rate, and the blood's viscosity decreases, allowing the blood to flow more easily.

Furthermore, due to the increased metabolic activity, the body also releases certain chemicals like nitric oxide which contribute to vasodilation. The overall effect is that more oxygenated blood reaches the muscles that are working hard during exercise. As a result, blood flow in the artery and other vessels increases, but it's important to note that this hyperemia, or increased blood flow, is tightly regulated and is a normal physiological response to exercise.

In contrast, the presence of plaques in the arteries can greatly reduce blood flow. A decrease in the vessel's radius due to plaque buildup can lead to a significant decrease in blood flow, which the body may attempt to compensate for by increasing blood pressure, but this can be hazardous to cardiovascular health. It's worth noting that during rest, the arterioles and capillaries also allow for an efficient exchange of substances due to their slower blood flow rate.

The answer is D: Electrons ;)

Answer:Electrons

Explanation:

Physics (static electricity)