gap genes ____, while segment polarity genes _____.

Answer: The first and the last are point source and the second and third are non-point source.

Explanation: I got these right on the quiz.

The first image and the last image are point source pollution while the second and third images represent non point source pollution.

A point source pollution refers to a pollution that is emerging from a particular point such as from a pipe. It is traceable to a given source. The non - point source pollution is not traceable to any particular source.

In the image as shown, the first image and the last image are point source pollution while the second and third images represent non point source pollution.

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The findings that dansyl binds to receptors on certain B cells but does not stimulate them to indicate that this drug (dansyl) is a hapten.

Hapten drugs can be defined as small molecular compounds that combine with proteins to trigger the concomitant production of antibodies and thus produce an immune response.

In conclusion, the findings that dansyl binds to receptors on certain B cells but does not stimulate them to indicate that this drug (dansyl) is a hapten.

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Answer:

B

Explanation:

The true statement that describes triglycerides is: Triglycerides are nutrient lipids used for energy, building cell structures, and insulation by the body.

Triglycerides are a type of lipid molecule that serve multiple essential functions in the body. Here's an explanation of the statement:

Triglycerides as nutrient lipids: Triglycerides are an important source of energy for the body. When we consume food, excess calories are converted into triglycerides and stored in adipose tissue to be used as fuel when needed.

Triglycerides for building cell structures: Triglycerides are crucial for building cell membranes. Phospholipids, which are a major component of cell membranes, consist of a glycerol backbone and fatty acid tails, similar to triglycerides.

Triglycerides for insulation: Triglycerides play a role in insulation and protection. They are stored in adipose tissue, which acts as a cushioning layer and provides thermal insulation for the body.

Triglycerides are indeed nutrient lipids that serve as an energy source, contribute to building cell structures, and provide insulation in the body. Understanding the functions and roles of triglycerides is important for maintaining a balanced and healthy diet.

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Answer:

substitution, deletion, insertion, insertion

Explanation:

Answer:

plants uses carbon dioxide during photosynthesis. plants use carbon to make carbohydrates and cellulose. animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide into the atmosphere.

Answer:

Plants uses carbon dioxide during photosynthesis. Plants use carbon to make carbohydrates and cellulose. Animals then eat plants and carbon is passed down. Animals then respire and release carbon dioxide into the atmosphere.

Bays are formed when the regions where the soft rock is eroded away that is present to the headland.

The regions where the soft rock is eroded away that is present to the headland is known as bays. The bands of soft rock i.e. sand and clay which erode more quickly than other more resistant rock. This leaves a part of land to stick out into the sea which is known as a headland. When a stretch of coastline is created from different kinds of rock, headlands and bays can be formed. Bands of soft rock i.e. clay and sand are weaker so that's why they can be eroded quickly. This process will leads to the formation of bays. A bay is also defined as inlet of the sea where the land curves inwards. A bay is a water body that is covered by land on three sides while on the other hand, oceans have no land is present on a specific side.

So we can conclude that due to erosion of soft rocks at the headland, bays are formed.

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A gene that has two codominant alleles and one recessive allele, such as the gene conferring human blood type, has 6 possible genotypes and 3 possible phenotypes.

The alleles of the gene in question are denoted by IA, IB and i where IA and IB are codominant over i.

The possible genotypes for the gene are:

IAIA, IAIB, IAi, IBIB, IBi, and ii.

Therefore, there are 6 possible genotypes for the gene.

The possible phenotypes are A, B and O. The phenotypes A and B are codominant, while the phenotype O is recessive. Therefore, the possible phenotypes for the gene in question are A, B and O. Thus, there are 3 possible phenotypes.

Therefore, a gene that has two codominant alleles and one recessive allele, such as the gene conferring human blood type, has 6 possible genotypes and 3 possible phenotypes.

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Answer:

The_GALLBLADDER_concentrates bile produced by the_LIVER_and stores this concentrate until it is needed for digestion.

Answer:

Yes.

Explanation:

Yes, the structures and functions of the central nervous system work to help prevent injuries with the help of bone. The main line of defense of central nervous system is the bones of the skull and spinal column, which create a hard physical barrier to injury. If these line of defense are not present for central nervous system so it has more chances to get injury so we can say that the structures and functions of the nervous system helps to prevent injuries.

Answer:

The amino acid sequence would be shorter than expected. The identity of one amino acid would change.

Explanation:

The geologist can infer that there have been significant environmental and biodiversity changes in the area over time, transitioning from a land environment with early horses to a swamp or forest that produced coal, and finally to a marine environment with trilobites.

The geologist can infer the following about the rock layers:
1. Relative age: According to the Law of Superposition, the lowest layer is the oldest, the middle layer is younger, and the top layer is the youngest. So, the early horse fossils are older than the coal and trilobite fossils.
2. Environment: The presence of coal in the middle layer suggests that the area was once a swamp or forest with abundant plant material that was compressed and transformed into coal over time.
3. Biodiversity: The presence of early horse fossils in the lowest layer indicates that there were land animals living in the area during that time period. Trilobites in the top layer suggest a marine environment, meaning that the area was underwater at some point after the formation of the coal layer.

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Answer:

This pair of molecules are cyclopentane and pentane.

Explanation:

The white balls represent hydrogen atoms while the black balls constitute carbon atoms both for configurations. While each hydrogen atom can only really attach to just one other atom, each carbon atom can connect to 4 other atoms. The first one, therefore, therefore consists of a cycle comprising 5 carbon atoms, each of which is linked to 2 additional carbon atoms as well as to 2 hydrogen atoms. This substance is known as cyclopentane.

Because the balls are joined one after another, the next one is just a linear molecule. It has 3 hydrogen atoms connected to the terminals of two carbon atoms plus 2 hydrogens bonded to each of the 3 separate carbons. The name of such a molecule is pentane.

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Answer: C. scorpions have changed as a result of natural selection

Explanation:

The text tells us that scorpions today are now smaller than they were in the past. This means that the scorpions have changed since then i.e. they have evolved.

The primary reason for evolution is natural selection which refers to a situation whereby only the organisms that are better adapted in their species survive.

The conclusion that can be drawn from this research therefore is that we have smaller scorpions today because they stood a better chance of survival than the larger ones and so survived whilst the larger ones died out.

Answer:

What exactly is your question?

Explanation:

Answer: All cells have membranes (the building), DNA (the various blueprints), and ribosomes (the production line), and so are able to make proteins

Explanation:

The question that cannot be tested with scientific investigation is "Are people who drink tea happier than people who don’t drink tea?"

Scientific investigation is definitely as the type of investigation or experimentation that follows the following critical steps such as:

The question "Are people who drink tea happier than people who don’t drink tea?" cannot follow through these steps listed above for a proper scientific investigation to be carried out.

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A change occurs in the genetic traits passed down from one generation to the next.

Natural selection is the process by which living organism populations adapt and change. Individuals in a population are naturally variable, which means they differ in some ways. This variation indicates that some people have traits that are better suited to their environment than others.

Biological evolution is the change in inherited traits in populations of organisms over successive generations. Trait evolution occurs when variation is introduced into a population through gene mutation or genetic recombination or is removed through natural selection or genetic drift.

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Answer:

Moist and shaddy

Explanation:

The possible reason some ecosystems still seem to be suffering from acid deposition is that acid deposition is caused by more than just sulfur emissions.

Acid deposition is the deposition of acid or acidic compounds from the atmosphere to the Earth's surface. Acid deposition refers to rain, snow, fog, or dry deposition that has a higher degree of acidity than normal. Acid deposition occurs when sulfur dioxide (SO₂) and nitrogen oxides (NOx) combine with moisture in the atmosphere, forming sulfuric and nitric acid. Acid deposition is commonly known as acid rain.

Volcanic activity can produce sulfur dioxide (SO2), which can react with moisture in the atmosphere to produce sulfuric acid, resulting in acid deposition. Soil chemistry - The soil chemistry in certain ecosystems might not be able to buffer the effects of acid deposition.

Sulfur emissions refer to the release of sulfur dioxide (SO₂) into the atmosphere. SO₂ is released into the atmosphere when coal and other fossil fuels are burned. Sulfur emissions can cause acid deposition, smog, and air pollution.

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The resting membrane potential, often known as the resting potential, is a voltage across the membrane of a dormant (non-signaling) neuron.

Ion concentration gradients across the membrane and the permeability of the membrane to each kind of ion dictate the resting potential. In neurons, an electrical gradient is used as a mode of information transfer.

At resting potential, the nerve is at -70 mV which is maintained by the sodium-potassium pump. This uses ATP to move three sodium ions out of the cell and two potassium ions into the cell. The potassium leak channel also contributes to this resting potential as potassium ions diffuse out of the cell to maintain the potential.

Due to the difference in electrical charges in the intracellular and extracellular fluid, an electrical gradient is formed. The gradient, if unmaintained, would balance the charges of the intracellular and extracellular fluid, as the sodium ions would move into the cell.

Therefore, The resting membrane potential, often known as the resting potential, is a voltage across the membrane of a dormant (non-signaling) neuron.

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Answer:

Stomach

Explanation:

Answer:

D, photosynthesis because plants take up CO2 to get energy

Where the information on the histogram is considered,

Average distance travelled is: (A + B + C + D + E + F)/6

Given:

Distance for A = 2.75cm

Distance for B = 1.25cm

Distance for C = 0.8cm

Distance for D = 1.75cm

Distance for E = 2.25cm

Distance for F = 1.4cm

Average distance = ( 2.75 + 1.25 + 0 .8 + 1.75 +  2.25 + 1.4) /6

Average distance = 1.733 cm

Smallest fragment distance = Distance of C - Average distance

= 0.8 - 1.733

= -0.933

Thus, the smallest DNA Fragment travelled farther than the average distance by 0.933cm.

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The given statement is false. This is because the number of species only remains constant but the composition will change.

The equilibrium theory of Island biogeography describes the relationship between extinction and the immigration of the species on an island. This mainly depends on the size and distance from the mainland. So when the immigration rate and the extinction rate are equal or the same, this island is said to be in equilibrium.

At this equilibrium state, the number of species present on this island is the same, or constant. This number of species will never change. But the composition of this species may change. Therefore, the given statement is false.

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