the photograph below illustrates , one of the main problems with modern commercial fishing. question 15 options: a) aquaculture b) bycatch c) invasive species d) overfishing

All cells are enclosed by a plasma membrane that is similar in structure and function.

Cell is the most basic unit of life. It is the building block of all the organisms. A cell is composed of cell organelles, cell membrane and cytoplasm. All of these components work together in order to keep the cell functional and alive.

Plasma membrane is the outer layer of the cell whose structure is composed of lipid bilayer along with proteins, carbohydrates and proteins. The function of the plasma membrane is to mediate the transport of molecules. The plasma membrane is semi-fluid in nature.

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This plate was inoculated with a bacterial lawn and exposed to UV light for 90-180 seconds and then incubated for 48 hours. Heat and ultraviolet.

Bacterial lawns can be produced manually with the aid of frivolously spreading a high quantity of microorganisms onto an agar plate using a sterile cotton swab or a Drigalski spatula. rather an automated gadget can be used including a spiral plater in which the plate is turned around and the sample is spread frivolously using an automated dispenser.

Most bacteria develop in colony layout and colonies will simplest seem on areas of the plate that were streaked on and appears like small white circles on a petri dish. however, for swarming (lawn) increase, it'll appear like a hazy blanket of boom that expand past the vicinity you made the streaking.

The microorganism was poured into what's known as a bacterial lawn on the agar plate. As the encompassing cells are inflamed and killed with the aid of the launched viruses, a clear spot at the agar---in the bacterial garden--develops, called a plaque.

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EEG patterns brain waves that are most pronounced and have the lowest frequency.

Stage IV sleep, the deepest level of sleep, is characterized by low frequency (1-4 Hz), high amplitude oscillations known as delta waves, the recognizable slow waves after which this stage of sleep is named. The complete process of transitioning from tiredness to deep stage IV sleep often takes an hour.

The amplitude and frequency of alpha brainwaves are higher. From 9 to 14 cycles per second, they oscillate. A person in an alpha state is frequently one who has finished a task and is taking a break. A person who stops to contemplate or practice meditation.

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The decrease in estrogen that occurs during the perimenopausal transition period is what causes osteoporosis because it leads to a greater rate of bone resorption than bone growth.

The hip, the backbone (spine), and the wrist are the areas of the body most commonly affected by osteoporosis, which is a disease that weakens the bones to the point where they shatter easily. Osteoporosis is sometimes referred to as a "silent illness" since its symptoms may not manifest themselves until a bone is fractured.

The deficiency of calcium during a lifetime is one of the factors that can contribute to the development of osteoporosis. A diet deficient in calcium has been linked to decreased bone density, an accelerated rate of bone loss, and an increased risk of fractures. Both men and women can experience bone loss if they severely restrict their food intake and maintain a low body weight.

Osteoporosis is caused by the drop in estrogen that happens throughout the perimenopausal transition phase. This decline promotes a larger rate of bone resorption than bone formation, which ultimately results in osteoporosis.

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Answer:

C

Explanation:

Important grazers, rabbits help preserve some crucial grassland environments. There would be more grass for the remaining rabbits if a second catastrophe reduced the population of rabbits. As there will be fewer rabbits to consume them, the density of grass plants will rise as the number of rabbits decreases.

In agriculture, grazing is an animal husbandry practise whereby domestic livestock are allowed to forage outdoors and consume wild plants in order to transform the cellulose found in grass and other forages—which is otherwise indigestible (by human guts)—into meat, milk, wool, and other animal products, frequently on land unsuitable for arable farming.

Since the dawn of agriculture, there has been grazing; before the first permanent settlements were built around 7000 BC, nomads domesticated sheep and goats, allowing for the keeping of cattle and pigs. Deforestation, extinction of native fauna, pollution of streams and rivers, overgrazing, soil degradation, ecological disturbance, desertification, and ecosystem stability are only a few of the detrimental effects of livestock grazing on the environment.

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Answer: TRUE

Explanation: All living cells arise from pre-existing cells. The cell is where the structure and function of all living organisms come from. The activity of an organism depends on the number of independent cells. Energy flow occurs within cells.