the shoot system of a barrel cactus consists of broad barrel-shaped green structures covered with spines. which of the following best describes the modified organs that form the barrel and the spines?
a- The barrel is a modified stem and the spines are modified buds
b- The barrel is a modified stem and the spines are modified leaves
c- The barrel is a modified leaf, and the spines and modified buds
d- The barrel is a modified root, and the spines are modified stems

She conducted an experiment to see that every plant need same type of enviornment or not.

A seed develops into an embryonic plant called a sporophyte, which then becomes a seedling. The germination of the seed initiates seedling development. The radicle (embryonic root), the hypocotyl (embryonic shoot), and the cotyledons are the three primary components of a typical early seedling (seed leaves).

Angiosperms are also referred to as flowering plants since they contain seeds inside of their fruit. Gymnosperms, on the other hand, have bare seeds on the surface of their leaves but no flowers or fruits. The seeds of gymnosperms are arranged like cones.

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Answer:

cellular respiration

Explanation:

Answer:

The age at which reproduction begins and how many individuals one individual can give birth from one pregnancy

Explanation:

Answer:

This process ensures the bodily functions and chemicals are kept in a state of balance which in return allows the body to function optimally

Explanation:

A system releases 7.9kj of heat while 6.5kj work is done on it. Calculate the total change in internal energy during these operations in kJ.

14.4kJ

The first law of thermodynamics which states that the total change in internal energy (ΔU) of a system is the sum of the total heat (Q) released by the system to its surroundings and the total work done (W) on the system by its surrounding, can be expressed mathematically as follows:

ΔU = Q + W      -------------------(i)

From the question;

Q = 7.9kJ

W = 6.5kJ

Substitute these values into equation(i) as follows;

ΔU = 7.9kJ + 6.5kJ

ΔU = 14.4kJ

Therefore, the change in internal energy is 14.4kJ

Answer:

its C

Explanation:

02 would be considered compounds.

A chemical compound is a chemical substance consisting of several identical molecules that contain atoms of more than one chemical element and are held together by chemical bonds.

A substance made of two or more  chemically combined elements. Examples of compounds are water (H2O), which is made of hydrogen and oxygen, and table salt (NaCl), which is made of sodium and chloride.

Molecular compounds are held together by covalent bonds; ionic compounds are held together by ionic bonds;  compounds between metals are held together by metallic bonds; coordination complexes are held together by coordinate-covalent bonds.

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It is false that sugars and phosphates break off from the DNA nucleotide to provide energy for DNA replication.

The procedures by which the genome's DNA is replicated in cells is known as DNA replication.

Before dividing, a cell must copy (or replicate) its entire genome so that each resulting daughter cell has its own complete genome.

This energy is derived from the nucleotides, which have three phosphates attached to them (much like the energy-carrying molecule ATP).

The energy released when the phosphate bond is broken is used to form a bond between the incoming nucleotide and the growing chain.

Thus given statement is false.

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Answer:

Studies have shown that the discharge of toxins is associated with an extremely high pressure of 15 megapascals, whereby the stylet, a thin barb, is able to penetrate even thick crustacean shells. The stylet is accelerated at a force of 5 million g in under 700 nanoseconds, making the discharge of toxins harpoon-like

Explanation:

The stylet applies a penetrating force to the crustacean. This force is used to puncture the exoskeleton of the crustacean in order to access the soft tissues inside.

The stylet is a sharp, pointed structure that is typically found on the mouthparts of certain animals, such as insects and crustaceans. It is used for piercing and feeding on the tissues of other organisms. In the case of the crustacean, the stylet is used to penetrate the hard exoskeleton in order to access the soft tissues inside for feeding. The force applied by the stylet is typically quite strong, as it needs to be able to puncture the tough exoskeleton of the crustacean.

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Because they are not formed of cells, viruses cannot maintain a steady state, develop, or generate their own energy. Viruses are more like robots than actual living things, even though they do multiply and adapt to their surroundings.

The ability to replicate and mutate are two aspects of life that viruses possess, but only in live host cells.

Viruses and bacteria differ greatly from one another. While viruses may grow in both living and nonliving environments, bacteria are found in nature. While viruses might perish without a host, bacteria can live without one. Viruses reproduce by lytic fission, whereas bacteria reproduce through binary fission.

Although they are minuscule as well, viruses are distinct from other microbes.

Viruses are intracellular creatures (they infect the host cell), whereas bacteria are intercellular organisms (they exist in between cells).

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Answer:

Iodine

Explanation:

Iodine is needed by animals because the body's metabolic rate is controlled by the action of an iodine hormone, called thyroxine, which is secreted by the thyroid gland in the neck.

If the animal fails to supply enough iodine through food to be able to make a normal amount of this compound, then the thyroid gland enlarges or expands trying to create enough, resulting in a common type of goiter.

The production plan for seasonal products is developed from a charted "product demand cycle" that tracks the best plants to sell at different times of the year.

This cycle takes into account the natural growth cycles of different plants, as well as consumer demand for those plants during certain seasons. By following the seasonal cycle, growers can ensure that they are producing the right plants at the right time, maximizing their profits and reducing waste. This approach also helps ensure a steady supply of fresh, high-quality products throughout the year, which is important for maintaining customer satisfaction and building a loyal customer base.

A product demand cycle is a chart that shows the expected demand for a product over the course of the year. The cycle helps businesses to plan their production schedule to ensure that they have enough supply to meet demand during peak seasons. For example, businesses can use the demand cycle to determine when to plant certain types of flowers or plants so that they will be ready for sale during peak seasons.

Overall, the product demand cycle is a crucial tool for businesses to plan their production schedule, manage their inventory levels, and maximize their sales during peak seasons.

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quoi

Explanation:

sorry I'm bisaya but hi my friend

Answer:

All types of biomolecules show radiation production resulting from amino acid degradation.  Lysine is converted to alanine by Lysine-pyruvate 6-transaminase.

Explanation:

Answer: Burning

Combustion is the scientific word for burning.

Research has proven that ;

During combustion(burning)  a substance reacts with oxygen from the air and these  reactions happen at high temperatures, and transfer energy to the surroundings as light and heat.

This is why you see flames when things burn.

Explanation:

Answer:

The more light there is, the more chlorophyll absorbs it, which means there are more electrons being transported from the chlorophyll, and while they are being transported, they create not only more ATP but NADPH2

Explanation:

The correct answer is iterative evolution. A crocodile-like morphology evolved independently in a group of Triassic reptiles called phytosaurs, and later, after phytosaurs were extinct, in true crocodiles. This is an example of iterative evolution.

Iterative evolution is the development of similar structures or forms independently over time in separate lineages. This is frequently seen in unrelated lineages of organisms that evolve similar features through convergent evolution. The crocodile-like morphology that evolved independently in Triassic reptiles called phytosaurs and later in true crocodiles is an example of iterative evolution as they evolved independently in separate lineages. The ability of the phytosaurs to thrive in an aquatic environment likely contributed to the development of this morphology, which later allowed true crocodiles to similarly thrive.

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Answer:

Jupiter.

Explanation:

Planet Jupiter is the planet in our solar system which has enough oxygen in the atmosphere to support life but the environmental conditions are too extreme. The temperature in the clouds of Jupiter is about -145 degrees Celsius which is equals to -234 degrees Fahrenheit). There may be plenty of oxygen available in the ocean of Jupiter to support life about a hundred times more oxygen than previously estimated.

The mutated genes that are always active are called oncogenes. Oncogenes are genes that have the potential to cause cancer when mutated.

Proto-oncogenes, or normal genes, may become oncogenes as a result of mutations or increased expression. Cancer-causing mutations in oncogenes are often dominant, meaning that only one mutated allele is needed to cause the disease.Oncogenes, as previously stated, are mutated genes that are always active. They promote cell growth and division by signaling to other genes in the body.

When oncogenes become overactive, they promote rapid cell growth and division, resulting in the formation of tumors, which can be malignant or benign. The excessive activity of these genes can lead to uncontrolled cell growth and division, resulting in cancer. Oncogenes are frequently inherited or acquired later in life as a result of environmental factors. In conclusion, oncogenes are mutated genes that promote cell growth and division and are always active, leading to the development of cancer when they become overactive.

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Answer:

1)centriole

2)asexual reproduction

Answer:

Aerosol they leave freely through the ozone.

Explanation:

I looked it up!

Answer:

Option 1

Explanation:

Valence shell/level/cloud is the last shell that has any electron(s) in it. It is usually called the outermost shell.

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The seven major fish body forms are- fusiform, compressiform, anguilliform, filiform, depressiform, sagittiform, and globiform.

Below are the descriptions of the three body forms and how their physical characteristics are related to their  habitat and niches:Fusiform body form: This body form has a streamlined shape that allows for easy movement through the water. It is most commonly found in open-water fish, such as tuna and mackerel, that need to move quickly to catch prey and avoid predators. Its narrow shape reduces drag, which increases its swimming speed. The fusiform body form is particularly adapted for fast swimming, and it is typically found in fish that are pelagic (live in open water).

Compressiform body form: This body form is flattened from side to side, which gives the fish a ribbon-like appearance. The compressiform body form is well adapted to moving through the water by means of quick, darting movements. They are generally found in areas of shallow water or near the bottom of the sea floor, where they can quickly move to escape danger. For example, eels use the compressiform body form to move quickly through small crevices.Anguilliform body form: This body form is characterized by a long, thin shape that allows the fish to easily move through the water.

This body form is found in fish like eels, which live in narrow spaces such as burrows, rock crevices, or coral reefs. The elongated and flexible body structure of anguilliform fish enables them to move through complex environments easily.In summary, the physical characteristics of fish are related to their habitats and niches. Each of these three body forms is adapted to different environments, from open water to rocky crevices, and each is suited to a different type of swimming or movement.

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Answer:

Scientific names are used to describe various species of organisms in a way that is universal so that scientists around the globe can readily identify the same animal.

Explanation:

Answer:

the different animal species that might have the same name or not so they use scientific description such as habitat genetics and appearance.

Answer:

Jharkhand

Explanation:

Jharkhand is a treasure-trove of minerals comprises 40 per cent of the mineral wealth of the country ranking first in the production of coal, mica and iron and helps in making Jharkhand one of the richest state of India in natural resources.

The correct statements about the assimilation of nitrogen for biosynthesis are:

1. Glutamine synthetase can be used to assimilate NH₃.
2. Glutamate dehydrogenase can be used to assimilate NH₃.
3. In the absence of fixed nitrogen, some cells can use nitrogenase to assimilate nitrogen from N₂.


1. Glutamine synthetase assimilates NH₃ by converting it into glutamine, which is an essential amino acid for biosynthesis.
2. Glutamate dehydrogenase assimilates NH₃ by converting it into glutamate, another important amino acid for biosynthesis.
3. Nitrogenase is responsible for fixing nitrogen, converting N₂ to NH₃, which can then be assimilated by cells. It is used by some cells when fixed nitrogen is not available in the environment.

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The principle of independent assortment states that during meiosis, the segregation of one pair of alleles for a given gene is independent of the segregation of alleles for other genes.

In the case of adermatoglyphia, caused by a dominant allele in the gene smarcad1 on chromosome 4, and bone density, which is a separate trait, it is likely that these traits would follow Mendel's principle of independent assortment. This means that the inheritance of the allele for adermatoglyphia would not affect the inheritance of the allele for bone density, and vice versa. Therefore, the presence or absence of fingerprints would not indicate anything about an individual's bone density and vice versa.

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