AYO PLS HELP...... condon amino acids ect

Answer:

A. allopatric

Explanation:

Allopatric speciation consists of the geographic separation of a continuous genetic background -population-, giving place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate individuals, or geological events. In this type of speciation, some barriers impede genetic interchange or flow. The populations are separated by a barrier and can not get together and mate anymore. These barriers might be geographical or ecological.

When a geographical barrier emerges, this is known as a vicariant event. Vicariance is the geographical separation of a population imposed by discontinuities in the physical environment that divides populations that originally were continuous. The process of vicariant allopatric speciation involves different steps:

• The emergence of the barrier.

• Interruption in the genetic interchange

• The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation.

• Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears.

• Prezigotic isolation mechanisms favored by selection once a secondary contact between the new formating species occurs.

So in the exposed example, the original population was composed of fishes living in a pond under the same environmental conditions and selective pressures.

However, with time, the pond dried, causing a decrease in water level and the emergence of a new physical barrier. The original population got separated by a piece of ground, and the original pond turned into two smaller ponds. The physical barrier is now interrupting the genetic flow between both groups.

Animals on each pond suffer from different environmental pressures to which they need to adapt. New mutations occur, leading to genetic divergence between the two separated groups. Two species emerged, red fishes and blue fishes.

Answer: The radioactive isotopes can be used to track many physiological functions and chemical reactions occurring within the cells of the living organisms including plants.

Explanation:

Phosphorus uptake by the plants: Phosphorus is an essential mineral required by the plants for their growth and metabolism. The radioactive phosphorus-32 can be used to track back the rate at which the plant absorbs the phosphorus from the soil. This can help scientists to identify plants that can absorb phosphorus more quickly.

Pesticides levels in the plants: The pesticides levels in the plants can be traced by using radioisotopes such as chlorine-36. This can be used to trace the fact that how much of pesticide is present in the soil and how much of it is utilized by the plants. This is helpful identifying the fact that which pesticide is useful for the growth of the plants.

Answer:

C. Xylem transport water and nutrients from the soil to the leaves while phloem transport carbohydrates from the leaves to the rest of the plant.

Explanation:

Answer:

Explanation: it’s a

Answer:



Figure 3 : Plant plasma membrane and cell-wall structure

A plant cell wall is arranged in layers and contains cellulose microfibrils, hemicellulose, pectin, lignin, and soluble protein. These components are organized into three major layers: the primary cell wall, the middle lamella, and the secondary cell wall (not pictured). The cell wall surrounds the plasma membrane and provides the cell tensile strength and protection.

© 2008 Nature Publishing Group Sticklen, M. B. Plant genetic engineering for biofuel production: towards affordable cellulosic ethanol. Nature Reviews Genetics 9, 433-443 (2008). All rights reserved. 

Figure Detail

Besides the presence of chloroplasts, another major difference between plant and animal cells is the presence of a cell wall. The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall. Plant cells have high concentrations of molecules dissolved in their cytoplasm, which causes water to come into the cell under normal conditions and makes the cell's central vacuole swell and press against the cell wall. With a healthy supply of water, turgor pressure keeps a plant from wilting. In drought, a plant may wilt, but its cell walls help maintain the structural integrity of its stems, leaves, and other structures, despite a shrinking, less turgid vacuole.

Plant cell walls are primarily made of cellulose, which is the most abundant macromolecule on Earth. Cellulose fibers are long, linear polymers of hundreds of glucose molecules. These fibers aggregate into bundles of about 40, which are called microfibrils. Microfibrils are embedded in a hydrated network of other polysaccharides. The cell wall is assembled in place. Precursor components are synthesized inside the cell and then assembled by enzymes associated with the cell membrane (Figure 3).

What Are Vacuoles?

Plant cells additionally possess large, fluid-filled vesicles called vacuoles within their cytoplasm. Vacuoles typically compose about 30 percent of a cell's volume, but they can fill as much as 90 percent of the intracellular space. Plant cells use vacuoles to adjust their size and turgor pressure. Vacuoles usually account for changes in cell size when the cytoplasmic volume stays constant.

Some vacuoles have specialized functions, and plant cells can have more than one type of vacuole. Vacuoles are related to lysosomes and share some functions with these structures; for instance, both contain degradative enzymes for breaking down macromolecules. Vacuoles can also serve as storage compartments for nutrients and metabolites. For instance, proteins are stored in the vacuoles of seeds, and rubber and opium are metabolites that are stored in plant vacuoles.

Conclusion

Plant cells have certain distinguishing features, including chloroplasts, cell walls, and intracellular vacuoles. Photosynthesis takes place in chloroplasts; cell walls allow plants to have strong, upright structures; and vacuoles help reg

Answer:

6.True

7.True

8.True

9. False, both RNA and DNA are nuclei acids. that are made from nucleotides

10. True

Explanation:

Answer:

6. False- light microspcopes

7. True

8. True

9. False- Nucleic Acids

10. True

Answer:

Ionic compounds are ion compounds. These ions are atoms that gain or lose electrons, resulting in a net positive or negative charge. Metals tend to lose electrons, so they have a net positive charge and become cations. Non-metals tend to gain electrons, creating a net negative charge of anions.

Explanation:

Answer:

Pathogenic

Explanation:

Answer:

D. Central nervous system completes development

Explanation:

Answer:

a

Explanation:

Answer:

The right temporal lobe

Explanation:

The cerebral cortex of the brain has two sections known as hemispheres, and each hemisphere can be divided into four lobes: frontal, parietal, temporal and occipital. Alzheimer's disease is the most common cause of dementia, which is characterized by the damage of the temporal lobe. Alzheimer’s disease usually initiates in the hippocampus, which is a structure inside each temporal lobe. The temporal lobes are involved in different neuronal functions: object recognition, face recognition, perception, memory, language, emotions, etc. The right temporal lobe is mainly involved in processing visual information (i.e., face recognition, object recognition, familiar recognition).

Answer:

Continental polar has very low temperatures, little precipitation, and air pressure varies with the pressure system moving through

The variation in the US continental region is due to the change in the weather during the day and the night.

These are the reasons for the polar air mass:-

Continental Polar air usually forms during the cold period of the year over extensive land areas.

The upper part of the region has a cold breeze while the lower part has a warm breeze.

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Answer:

it can be shows in DNA Test

Answer: A selection of the best-suited traits for the environment, leading to adaptive evolution brainliest

Explanation:

Answers

Lion,Tiger -Carnivores

vulture- scavenger

Cow,sheep -Herbivores

Man, Pig -Omnivores

In an ecosystem, consumers are organisms that obtain their energy and nutrients by feeding on other organisms. They are a vital part of the food chain, and they come in different sizes and types.

Consumers can be classified into several categories based on what they eat. For example:

Consumers play an important role in an ecosystem, as they help to transfer energy and nutrients from one level of the food chain to another. They are an integral part of maintaining the balance and stability of an ecosystem.

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Answer:

Antiuretic hormone is a hormone that performs functions related to the reabsorption of water molecules through of the kidneys and with the decrease in the amount of urine accumulated in the body. An excess of antiuretic hormone conditions a retention of water and the elimination of sodium in the urine

Explanation:

Antidiuretic hormone (ADH) participates in regulating the water balance in the body, controlling the amount of water reabsorbed by the kidneys after they have filtered waste from the blood. Excess ADH leads to increased water reabsorption in the collecting duct, with increased urinary osmolarity. If there is too much ADH, water is retained, blood volume increases and affect can lead to nausea, headaches, disorientation, lethargy and hyponatraemia (decreased sodium concentration in the blood).

Answer:

Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome.

Explanation:

This arrangement means that it is the male that determines the sex of the offspring when fertilizationocc

Answer:

A

Explanation:

just A, I remember doing this in like 4th or 3rd grade don't really remember but I makes sense

Answer:

D

Explanation:

70 plus 30 = 100%

Answer:

it is A

Explanation:

it A because it is a balance the predator eat the pray so it does not over populate

Answer:

The urinary system removes liquid waste, while the excretory system removes solid waste.

Explanation:

Answer:

Reminder to be happy, go drink some water, eat some food and relax! You are loved :) <3

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Answer:

they could use other forms of energy, such as solar or wind.

Explanation:

Explanation:

1.-¿Es la primera vez que ocurre una pandemia en la humanidad?

La pandemia de coronavirus no es la primera pandemia que enfrenta la humanidad, a lo largo de la historia se han registrado varias pandemias, como la Peste Negra, una pandemia que ocurrió en Europa en el siglo XIV y mató a aproximadamente 200 millones de personas.

2.-¿Cómo se habrá enfrentado la gente a situaciones similares en los últimos años?

Cada pandemia que enfrenta el mundo ha traído nuevas lecciones y descubrimientos científicos sobre cómo reducir los impactos provocados por la enfermedad y nuevas formas de tratamiento como los medicamentos y las vacunas, que hasta el día de hoy tienen un impacto positivo y benefician a las generaciones actuales.

3.-¿Por qué debemos seguir las recomendaciones de los científicos?

Es fundamental seguir las recomendaciones de los científicos para contener un virus contagioso, pues a través de la ciencia se descubre cómo actúa el virus en el cuerpo humano, cómo se produce el contagio, cuáles son las mejores formas de prevención, etc.

La ciencia es fundamental para la humanidad, a través de estudios y evidencias científicas, el ser humano logra soluciones a problemas que impactan en la vida de las personas.

Answer: When a cat feels threatened the muscles under their skin contract to extend

the hairs on their backs and tails.

Explanation: