Describe how an operon regulates the gene expression of genes.

As you can see in the punnet chart. The trait (N) is linked to the mother's two X chromosomes, so the trait will be inherited by all her offspring since they all receive one chromosome from the mother. And because both copies of the trait in the mother are dominant. All her offspring will have the trait.

By affecting hazard frequency and intensity, vulnerability, and exposure patterns, climate change can increase the risk of disasters. The likelihood of more droughts and worse storms will likely grow with rising global surface temperatures. More water vapor evaporating into the sky provides fuel for storms to grow stronger.

With some tropical cyclones, extreme sea level events have increased due to climate change, which has also increased the intensity of other extreme events like flooding and its effects. Low-lying megacities, deltas, coasts, and islands have become more vulnerable as a result in many regions of the world.

There are connections between how climate change affects different societal groups. Drought can be harmful to both human health and food production. Flooding has the capacity to ruin infrastructure, ecosystems, and spread disease. Health issues can affect the availability of food, lower worker productivity, and increase death.

A few examples of indirect influences are invasive species, CO2 fertilization, nitrogen and acidity deposits, temperature and precipitation fluctuations, and tropospheric ozone.

A number of human actions, such as deforestation, pollution, overcrowding, and the burning of fossil fuels, have a negative impact on the physical environment.

As a result, we can draw the conclusion that climate change can raise the risk of disasters by changing the frequency and severity of hazards, influencing vulnerability, and altering exposure patterns.

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A phenotypic ratio of 9:4:3 is indicative of epistasis. It is referred to as recessive epistasis. It is a phenomena where one gene pair expression deoends on the other gene pair.

Multiple alleles influence the same trait which are considered as the alternative of similar gene. Polygenic inheritance is about a trait of more than one gene. Codominance happens when two alleles of similar gene are being expressed separately to produce various traits in an individual.

Answer - D. Epistasis

Population growth demands an increasing amount of resources such as energy, food and water. This causes a change in the natural conditions of the planet. For instance, the use of fossil fuels to produce energy is the mayor cause of climate change, that result in the rise of the planet's temperature.

Also the use of land for building cities or using it for livestock and crops changes the landscape.

All of this result in changes in wind patterns and the rising of wind speed, especially as a result of the rising temperatures.

Another source of nonpoint pollutant of aquatic environment is oil spill.

Nonpoint source pollution happens when runoff from rain and snowmelt carries pollutants into waterways such as rivers, streams, lakes, wetlands, and even groundwater.

Answer:

Explanation:

Budding is a process of asexual reproduction. Budding is where a piece of the original organism gives birth to another part of it. A very good example of this is plants where they have buds and they grow from these buds.

The products of photosynthesis are glucose and oxygen.

The process of photosynthesis involves two stages: the light reaction and the dark reaction.

During the light reaction, ATP and NADPH are formed. Light reaction gives rise to the formation of oxygen.

During the dark reaction(Calvin cycle) there is utilization of carbon dioxide along with ATP and NADPH formed during light reaction to form glucose.

Epinephrine (sometimes caled adrenaline) is a critical hormone for the fight/flight response agains threats. When epinephrine is secreted, it reaches many organs, among them the liver. When liver senses epinephrine it release glucose in the bloodstream, which will be criticar for the muscles to act. Wether the response is fight or flight, muscles will need glucose for the intense inminent effort. That is, liver cells provide the necessary fuel (in this case glucose) for the body to move, either to fight, or to flight.

Solid Crystals of Iodine are a type of molecular crystal that keeps molecules coherent mostly due to Van der Waals attraction, which is weak. When heaten, those Van der Waals forces are broken, releasing gaseous molecules of iodine. Bceause of that, the solid sublimes and a vapor is formed. This process is called sublimation, which means the transition from solid directly to a gas state.

The overall equation for cellular respiration is 1 glucose molecule plus diatomic oxygen (6 molecules of O2) and produces energy in form of ATP plus carbon dioxide (6 molecules of CO2), and water (6 molecules of H2O), as stated in the D answer option, 1 glucose + 6 oxygen = 6 carbon dioxide + energy.

This process can be compared with photosynthesis, which it's kinda the counterpart of it since in it, the process begins with 6 CO2 molecules, and 6 H2O molecules and produces the 1 glucose molecule and 6 molecules of O2.

The answer is no.

There are multiple ways our bodies ensure that we have a unique set of DNA that differs from our parents. For starters, you inherit two copies of each chromosome—one copy from your mom and one copy from your dad. This means that your genome (all of your DNA) is already different because it contains chromosomes from both of your parents. This can also help explain why two siblings appear to have different genetic ancestry, since they may get different chromosomes from their parents.

Meiosis is the cell division type that occurs in sexual cells. This process consists of eight steps Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II and Telophase II. During the first four stages chromatids exchange DNA among themselves, creating recombinant chromosomes (chromosomes that have a fragment of a different origin). During the last two phases, chromosomes are separated in chromatids, and each cell produced after Telophase II is haploid, that is, it has one chromosome set.

The 4 more common elements in living beings are Carbon, Hydrogen, Oxygen, and Nitrogen. Of these 4, carbon is the one present in all organic compounds and the main biomolecules: carbohydrates, lipids, and proteins.

This means A. Carbon is the right answer.

If we have to think quickly about the function of each component we would say that:

-fixing the semar is for adhesion to slide glass

-lugol will fix the violet crystal dye to bacteria

-alcohol eliminate the violet crystal from gram negative ones

-safranin, will stain the gram negatives which are the ones that are discolored

So if your preparation is clearer than usual I would think in:

Option B skipping the iodine step therefore there would be no intensification in crystal violet (this could be the best explanation).

Option A forgetting to heat fix the smear, this is a previous and fundamental step that makes adhesion to slide glass. If you skip it, probably your preparation could be clearer than usual since the bacteria did not fix correctly to the glass.

Algae, a type of aquatic plant, was the first plant to emerge on Earth. Moss next followed, then terrestrial ferns, then blooming and non-flowering plants. Therefore, bryophytes, ferns, angiosperms, gymnosperms is the right response.

What is origin of modern groups of plants?

Land plants and embryophytes are descended monophyletically from a watery ancestor that, if it were still alive, would be grouped with cyanophycean green algae.

Bryophytes - Any nonvascular seedless plant, such as mosses and liverworts, is referred to as a bryophyte. Although most bryophytes lack complex tissue organization, they exhibit a wide range of ecological and morphological diversity.

Ferns-Any of the many seedless vascular plants that reproduce through spores and typically have feathery fronds with many leaflets can be classified as a member of the phylum Pterophyta.

Angiosperms- Angiosperms are plants that flower and produce fruits that contain their seeds. With about 300,000 species, they are the most numerous and diverse group within the kingdom Plantae.

Gymnosperms -Conifers, cycads, gnetophytes, are examples of gymnosperms, which are plants that produce seeds. They have bare seeds and don't produce flowers or fruits.

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An open circulatory system is a system in which the blood is not sealed in arteries and veins, and it can also be directly open to the environment.

A closed circulatory system is a system in which the blood is sealed in arteries and veins and never leave the system.

Analyzing the human circulatory system, we see that the blood is sealed in veins and arteries and never leave the system.

Therefore, the correct answer is B) closed circulatory system

By definition inference means to deduce, therefore the first option makes no sense as is not stated the reason why the plant is being measured o what this measure indicates, the second option falls into the same issue as the previous one there is no explanation of why or how this indicates something, therefore we can say that the correct option is the third one (C) as there is a process of observation and a conclusion draw from this observation.

We have to consider that, as the question's statement tells us, individuals that are better adapted, are more likely to produce offspring, and this is because they will be more prepared for the environmental pressures, such as predation, hot temperatures, and low levels of humidity, do the traits these organisms bear, will be passed to the future generations, increasing the frequency of those particular traits that enabled them to survive, and overall decreasing the traits that the organisms which didn't survive didn't pass to the next generations.

This leads us to say that the correct answer could be the second one, "several corn plants in a field are resistant to pests and low water levels", but the most accurate statement is the third one because it tells us if that trait of the individuals make them more capable of surviving and reproducing, "C. rabbits with longer fur survive colder winters and will produce offspring".

Answer:

Through this experiment we study the process of photosynthesis.

• In the begining the leaf disks's tissue has oxygen, this allows them to float.

• Then, in the experiment we infiltrate the leaf disks with a solution that has bicarbonate, and as a result their density changes (it increases) and so the leaf disks sink.

• Once the disks are on the bottom and we direct the light to them the process of photosynthesis starts, being the bicarbonate the source of carbon for the process.

• As we know a product of the photosynthesis proces is oxygen, so when it is released into the leaf disks the overall density changes again and the disks rise.

So as we can see, in this experiment the purpose of the bicarbonate is being the source of carbon for the process of photosynthesis that occurs in the leaf disks.

Excretory organs function to remove nitrogenous wastes from the circulating blood.

Excretion is the process of removing wastes and excess water from the body. During filtration, materials such as water, urea, glucose, salts, amino acids, and some vitamins are removed from the blood.

In renal tubule extracts chemicals and secretes them in to the tubular fluid. More filtration is done in proximal convoluted tubule and nephron loop, it serves to remove wastes clears blood of pollutants, and removes urea, uric acid, bile acids, ammonia. Hence, Urea is carried in the bloodstream to the kidneys, where it is removed along with water and other wastes in the form of urine.  

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amino acidsOkay, we can mention that the energy transformation occurring in plants at photosynthesis is basically the keystone of all of the trophic networks or food chain since these organisms can make their own resources on the stroma and thylakoids of their chloroplasts, like starch made up of glucose (capturing CO2, and producing also O2 as a subproduct), from the sunlight, reason they're known as autotrophs.

This will be used by animals, which will eat the plants to get food in form of leaves or fruits, getting energy for their cellular processes, like the production of ATP molecules for cellular respiration. This process consists of the catabolization of greater molecules to smaller ones taken mainly from carbohydrates, but also from aminoacids or lipids.

To answer this question we need to analyze the function of each organelle quoted.

Golgi apparatus is in charge of packaging proteins to export inside and outside the cell, so this is found in both cell types.

Mitochondria, this organelle is in charge of the process known as cellular respiration, specifically the respiratory chain, where ATP the energetic coin of the organisms is generated in great quantities so, is also found in both cell types.

Chloroplasts, this organelle is in charge of the photosynthetic process specifically photosystems I and II, where photons hit chlorophylls and start the photosynthetic reaction, only photosynthetic organisms possess chloroplasts, so this can be found in plants and algae. Therefore option C is the correct answer.

BIOLOGY > CELL BIOLOGY > PARTS OF THE CELL

EXPLANATION:

The human brain holds information that relates to managing everyday life from both the conscious and subconscious. It holds information about the bodily functions that happen voluntarily and involuntarily. Much like the brain, the nucleus holds genetic information needed by the cell to make proteins and controls the organelle functions.

ANSWER: A.

** B is only true for the human brain. C is only true for cells. D is not a function of the human brain.

Segmentation is a type of muscular movement of the Gastrointestinal tract that helps chyme to mix with gastric secretions. Then, segmentation helps to mix food with digestive juices and facilitates absorption.

We can conclude that the correct answer is:

We should not view usually lactose intolerance as a disease in adult humans because, in the course of our evolutionary history, adult humans did not first begin to consume dairy products.

When your body doesn't produce enough lactase, it usually leads to lactose intolerance. You normally produce lactase in your small intestine, where it is used to break down lactose. An enzyme is a protein that causes a chemical reaction to take place. It indicates your body does not create enough lactase if you have a lactase deficit.

A lot of people have lactose allergies. Although lactose intolerance is less common in children and adolescents, it is common in adulthood. In the opinion of some medical professionals, lactose intolerance is not a disease or a serious health issue, but rather a common human condition.

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The components of organic molecules, such as carbon, nitrogen, oxygen, hydrogen, phosphorus, and sulfur, are constantly being stored and recycled as part of their biochemical cycle.

Water contains oxygen and hydrogen and it is essential to all living processes.

Carbon is found in all organic molecules.

Nitrogen is found in nucleic acids and proteins.

Phosphorus is a major component of nucleic acid. Along with nitrogen, phosphorus is very important for agriculture, both molecules are used as fertilizers.

The cycling of these elements is interconnected, the movement of water is important for leaching nitrogen and phosphate from earth to water bodies such as lakes, rivers, and the oceans. The ocean is a major reservoir of carbon. These minerals are cycled through the entire biosphere, they are found in the atmosphere (water is found as vapor, nitrogen as gas as well as oxygen and carbon forming carbon dioxide, or pure oxygen, and phosphorus is found as an aerosol)

They are also found in the land as part of inorganic substances, or as a part of organic organisms. As well as within the hydrosphere, either as sediments or as part of the living organisms.

Proteins are synthesized in eukaryotic cells from DNA by the intervention of RNA, which replicates the pair bases present in the deoxyribonucleic acid to eventually, with the participation of ribosomes, build up amino acids, that finally will form proteins.

So the answer is the third option, the information in DNA is transcribed into RNA, which can leave the nucleus to synthesize proteins

Answer:  Hypothalamus

Explanation: It is a forebrain area below the thalamus that regulates both the autonomic nerve system and pituitary function, governing body temperature, thirst, appetite, and other homeostatic systems, as well as being involved in sleep and emotional activity.

1. Law of conservation of energy - energy cannot be created nor destroyed.

2. Law of conservation of mass - matter cannot be created nor destroyed.

3. Raymond Lindeman - a biologist who studied ecosystem ecology.

4. Trophic level - a position in a food chain, a food web, or an ecological pyramid that is occupied by a group of organisms.

The explanation can be provided as follows:

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As we know plants are a sink of carbon, through the process of photosynthesis carbon dioxide is fixated, now this has been widely discussed if this will actually would help to decrease carbon dioxide in the atmosphere as trees also breed. In the case of young plants, the rate of photosynthesis surpasses the respiration rate however once the growth has slowed both rates are similar, now there are other photosynthetic organisms that could make a bigger difference and those are cyanobacteria and algae. Finally, we can say that more plants can help however the majority of their benefits come from other aspects such as habitat or decreasing urban heat, as carbon sinks there are more efficient organisms, likewise, carbon dioxide is not the only greenhouse gas, there are other gases with greater impact like methane.