The oxygen end of the molecule has a slightly negative charge while the hydrogen ends of the molecule have a slightly positive charge. The composition and polar covalent nature of water allow water molecules to be attracted to and form _________.



Question 12 options:

Hydrogen bonds with other water molecules.


Covalent bonds with non-polar molecules.


Ionic bonds with free radial ions.

Answer: Due to deforestation

Explanation:

The right answer is B) Animal cells are generally smaller than plant cells.

The cell is the basic structural and functional unit of any living organism, that is to say that all living forms are composed of one or more cells. We speak of a unicellular or multicellular organism. The cells are either of the prokaryotic type or of the eukaryotic type.

The plant cell is larger than the animal cells, all the sites of biology without exception support this point of view. The animal cell has an average size of 50 microns (the largest of which, the oocyte is 120 micrometer) while the plant cell has an average size between 100 and 200 micrometers, so about four times more.

The vacuole is not systematically found in all animal cells (except for some specialized cells or macrophages where digestive vacuoles are found), moreover, it is not as characteristic as that of plant cells. it is much smaller or non-existent. Rare authors speak of vacuoles in animal cells but the term vesicle is more appropriate. Are different from vesicles because vacuoles:

1. Have a longer life

2. Are relatively stationary (static)

3. Are often very big

Work is the process of transferring energy through the motion of an object by a force, while energy represents the capacity to perform that work. Potential energy stores energy within a system, unlike work which cannot be stored. Techniques for calculating work are used to determine the energy transfer in various situations.

Difference Between Work and Energy:

Although work and energy are closely related concepts in physics, they are not the same. Work is defined as a force causing the movement—or displacement—of an object. In the equation W = Fd, 'W' stands for work, 'F' for force, and 'd' for displacement. Work effectively transfers energy from one object to another, modifying the total energy of the object.

In contrast, energy is the ability to do work. Potential energy relates to the energy stored within a system, whereas kinetic energy, given by the equation KE = 1/2mv², is the energy of motion. When work is done on an object, it can lead to an increase in either potential or kinetic energy, which are forms of mechanical energy.

Unlike work or energy, heat cannot be stored and is related to changes in populations of energetically different states. Both heat and work are energy processes, not entities that can be contained like energy itself. Therefore, techniques for calculating work are central in determining the energy transferred, for example, from kinetic to thermal energy by a car's brake shoes.

A biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled between the G1 and G2 phases.

The amount of DNA gets doubles in between the G1 and G2 phases because in between both of these phases, there is a phase of synthesis (S-phase).

After resting condition, the cell enters the S-phase, where DNA replication occurs, and the amount of DNA gets doubled after the completion of this phase throughout.

During the G1 phase of the cell cycle, the cell does not have the competence to replicate its DNA. From this phase of cell division, the cell enters the S-phase where the DNA gets synthesized and the amount of its gets doubled in each cell.

Therefore, a biochemist measured the amount of DNA in cells growing in the laboratory and found that the quantity of DNA in the cells doubled between the G1 and G2 phases.

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Answer:

true

Explanation:

Final answer:

The parietal bones are the pair of bones that form the superior portion of the cranium, joined at the top of the skull and bordered by other cranial bones.

Explanation:

The superior portion of the cranium is formed by the parietal bones. These are paired bones that join together at the top of the skull, providing significant coverage and protection for the brain. The parietal bones are bordered anteriorly by the frontal bone, inferiorly by the temporal bones, and posteriorly by the occipital bone. Additionally, the entire cranium is composed of eight bones: one frontal bone, two parietal bones, two temporal bones, one occipital bone, one sphenoid bone, and one ethmoid bone, together creating the protective case around the brain.

An aquifer is of 2 types -  unconfined and confined aquifers. It can be defined as a body of permeable rock which can contain groundwater.

Confined aquifers have an impermeable rock layer that prevents water from seeping into the aquifer from the ground surface. So, this aquifer is present between the rocks layer that are impermeable.    

When a tumor that is present on an individual is too large or serious for lumpectomy, the procedure that is to be performed is mastectomy.  This procedure is a way of having to remove a tumor in a form of surgery to prevent the tumor from spreading or to prevent any serious consequences.

A mastectomy is performed when a tumor is too large or too serious for a lumpectomy. Surgery aims to treat isolated, solid cancers, and a biopsy is used for diagnosis before surgical procedures.

When a tumor is too large or too serious for a lumpectomy, a mastectomy is performed. Surgery is a common intervention for treating isolated, solid cancers where surgeons aim to remove the whole mass along with local lymph nodes if necessary. A biopsy may be conducted prior to surgery to analyze tissue specimens in a medical laboratory for cancer diagnosis. In situations where tumors cannot be removed without damaging vital structures, as it sometimes happens in the brain, other types of treatments are mandatory.

Answer:

The correct answer would be repeated severe injuries because of pain insensitivity.

Explanation:

Congenital analgesia is a genetic disease that causes an individual to have no pain or pain insensitivity. This lack of pain leads to an accumulation of bruises, wounds, broken bones, and other health problems that may go undetected.

These injuries often lead to a short life expectancy in people with congenital analgesia to pain.

Thus, the correct answer would be repeated severe injuries because of pain insensitivity.

Plants during the photosynthetic reaction, the energy and carbohydrates produce to maintain their life cycle. The photosynthetic system consists on two part as light-dependent an independent cycle. In the dependent cycle, the plants use the light to generate the energy compounds as ATP to start up the Independent cycle. The independent cycle also known as the Calvin Cycle, the environmental carbon dioxide is fixed to generate the carbohydrates. The most important carbohydrate that generates in this process is the glucose. The plant generates carbon dioxide and lactose is only present in milk.

BERYLLIUM - 1278 degrees C

The right answer is Be (1 287 °C).

Beryllium (Be) is a chemical element with the atomic number 4 and an atomic mass of 9,0121831 u. In the periodic table, it is the first representative of alkaline earth metals.

A bivalent element, beryllium is an alkaline-earth metal with a steel-gray appearance. It is light, fragile and toxic.

Beryllium has the highest melting point of all light metals. It is fragile, but lighter and six times stronger than aluminum.

On dying of plants or animals decomposers transform their proteins and other nitrogen containing compounds into ammonia. This return the phosphorus to the soil. This aids in the replenishment of phosphorus back in the ecosystem.

The organisms involved in degrading dead and decaying organisms are called decomposers.

On dying of plants or animals decomposers transform their proteins and other nitrogen containing compounds into ammonia.

The release of phosphorous in this process return the phosphorus to the soil. This helps in replenishment of phosphorus back in the ecosystem.

Thus, in this way decomposers provides phosphorus to soil, groundwater, oceans, lakes, ponds, and rivers.

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Correct answer: Mitochondria

Mitochondria is an organelle that is known to produce the energy currency called the ATP of the cell. The main reaction or cycle involve in that area citric acid cycle, Krebs cycle.

All animal and plant possess organelles that regulate specific function inside the cell. Mitochondria and chloroplast are energy-producing organelles inside the cell. The supply adenosine triphosphate (ATP), which provide fuel to the body for their growth.

An increase in the severity of a disease or its symptoms is called exacerbation. Acute diseases have a short duration with predictable progression, while emerging diseases are new or growing in incidence.

An increase in the severity of a disease or its symptoms is often referred to as an exacerbation. When a disease is said to be emerging, it means that the disease is making an initial appearance in a population or that is increasing in incidence or geographic range. On the other hand, a syndrome refers to a set of symptoms or conditions that occur together and suggest the presence of a certain disease or an increased chance of developing the disease.

An acute disease is a disease of a relatively short duration that develops and progresses in a predictable pattern, often characterized by a sudden increase in severity or symptoms.