Which event was a sign to scientists that DDT was a harmful pollutant?
O Trout were regularly dying in mass quantities each year.
O Marine invertebrate populations were experiencing significant declines.
O Levels of ultraviolet radiation at the south pole were increasing.
O Bald eagle populations declined to only 500 pairs in the 1960s.

Answer:

b

Explanation:

they chose the best tomatoes to make even better ones

Breeding tomatoes to increase fruit size is an example of selective breeding. Therefore option A is correct.

Selective breeding, also known as artificial selection, involves the intentional breeding of plants or animals to promote desired traits. The process typically involves selecting individuals with specific characteristics and breeding them to pass on those traits to the next generation.

In the given options, breeding tomatoes to increase fruit size is an example of selective breeding. By carefully selecting tomato plants with larger fruits and allowing them to reproduce, breeders can gradually enhance the fruit size of future generations.

This process relies on natural genetic variation within the tomato population and human intervention to guide the breeding process toward the desired outcome.

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Answer:

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Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

According to the information we can infer that the images match the sentences in the following way: Image A - Statement 5, Image B - Statement 6, Image C - Statement 4, Image D - Statement 1, etc...

To make the best match between images and statements we must look at the images. Later we must take into account the elements that describe the statements. Once we identify this information we can establish the correct match. According to the above, the correct match is:

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Answer:

1:C

2:C

3:D

4:D

this is 110% fact answer

Privacy concerns that develop when a donor's DNA is identified without his or her agreement is the sort of ethical or social issue that might most likely result from the usage of DNA fingerprinting. Therefore, option (B) is correct.

Analysing a person's distinctive DNA profile, which contains sensitive personal data, is known as DNA fingerprinting. The collection and identification of someone's DNA without that person's knowledge or agreement creates issues with respect to privacy, individual autonomy, and potential misuse of genetic data.

To address these moral and societal concerns, DNA fingerprinting practices must respect people's privacy and their informed permission.

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Answer:

5/6

Explanation:

The five are Monera, Protista, Fungi, Plantae, and Animalia

There are six if you include archaebacteria and eubacteria

It depends which one you learned honestly

Answer:

Limilus and L. pilyphemus

Explanation:

Atlantic horseshoe crab.

Answer: Nucleus (C)

Explanation:

Rough ER is found throughout the cell but the density is higher near the nucleus and the Golgi apparatus. Ribosomes on the rough endoplasmic reticulum are called 'membrane bound' and are responsible for the assembly of many proteins. This process is called translation.

Answer:

A) primary somatosensory cortex exhibits somatotopy.

Somatotopy refers to the organization of the primary somatosensory cortex (located in the parietal lobe of the brain) in which it is mapped out according to the different areas of the body. Every part of the somatosensory cortex corresponds to a specific part of the body. This means that when a particular region of the body is stimulated (e.g. through touch), the corresponding region of the brain is also stimulated, which allows the brain to perceive the location and nature of the stimulus. This topographical organization of the brain is important in processing and integrating sensory information, and it is essential for motor planning, movement, and sensory perception.

The numbers obtained for resistance (ohms) appear to be quite consistent when compared to the supplied values, with a few minor differences in decimal places. The computed resistances fall between around 27 and 33.33 ohms.

Ohm's Law (V = IR), where V is voltage, I is current, and R is resistance, states that current in amps and voltage in volts have a constant relationship. Although there may be some changes owing to rounding or accuracy, the numbers often lie within a comparable range.

It's crucial to keep in mind that these calculations make the idealistic assumption that current and voltage follow a linear relationship, which may not always hold true in practical applications, particularly when working with non-ohmic or non-linear components.

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Answer:

C

Explanation:

btw this is physics

Answer:

C

Explanation:

It has Potiental Energy since it retains height over the base level. This can be seen in the formula PE = mgh in which is directly dependent on height. It also obviously retains Kinetic Energy due to the fact that it is in motion.

The statements associated with action potential depolarization phase are: - Occurs as soon as threshold (-55 mV) is reached, Requires ionic concentration gradients,  Involves sodium movement across the neuron's membrane, Mediated by voltage-gated channels, Involves potassium movement across the neuron's membrane

- Action potential is an electrical impulse that travels along the membrane of a neuron or muscle cell.

- Depolarization phase is the first phase of action potential, in which the membrane potential rapidly becomes less negative and moves toward a positive value.

- Depolarization phase is initiated when the membrane potential reaches a threshold value of -55 mV.

- The depolarization phase requires ionic concentration gradients, which are differences in the concentrations of ions such as sodium and potassium on either side of the cell membrane.

- During the depolarization phase, sodium ions move rapidly into the cell through voltage-gated sodium channels that open in response to the depolarization of the membrane potential.

- The influx of sodium ions causes the membrane potential to become more positive, further opening voltage-gated sodium channels and creating a positive feedback loop that rapidly depolarizes the membrane.

- The depolarization phase is mediated by voltage-gated channels, which are proteins that open or close in response to changes in the membrane potential.

- As the depolarization phase progresses, voltage-gated potassium channels also begin to open, allowing potassium ions to move out of the cell and repolarize the membrane.

- The movement of ions during the depolarization and repolarization phases of action potential is an active process that requires energy and is mediated by ion pumps and channels.

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Answer:

4

Explanation:

Withdrawal is different for everyone; there really is no "normal" and it can be hard to predict an individual person's experience. Some symptoms—like changes in sleep patterns, fatigue, and mood swings—can last for weeks or months. You'll likely begin to feel better around five days to a week after you stop drinking

what is the question? I can't see.

Answer:

buney şimdi what bunu annlaamm

Answer:

7

Explanation:

The preferred generation of hybrid offspring is called the P generation and can often be used to determine the dominant gene.

Dominant directs to the relationship between two versions of a gene. Then, Individuals receive two versions of each gene, which are called alleles, from each parent. When the alleles of a gene are different, So, one allele will be expressed This is a dominant gene.

When The P generation is the start of Mendel's work on inheritance, or receiving genetic qualities by transmission from parent to offspring. So, Basically that it refers to traits or genes that are passed from a parental generation to its offspring

When P is the parent gene, and also then the offspring goes to the F1 and also then F2, the dominant gene is what gene wins over a recessive. So the correct option is 'C'.

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Answer:

Crust, mantle, and the core are the interior parts of earth.

Explanation:

Earth's interior is divided into three layers i. e. crust, mantle, and the core. The temperature of crust is lower than the rest of the layers and when we go inside earth from crust to mantle and the core, the temperature is increases. The temperature of crust is 200° Celsius to 400° Celsius, the temperature of mantle is 1000° Celsius to 3700° Celsius and the temperature of core is 4,400° Celsius to 6,000° Celsius.

Answer:

Earth's interior is divided into three layers i. e. crust, mantle, and the core. The temperature of the crust is lower than the rest of the layers and when we go inside earth from crust to mantle and the core, the temperature increases. The temperature of the crust is 200° Celsius to 400° Celsius, the temperature of the mantle is 1000° Celsius to 3700° Celsius and the temperature of the core is 4,400° Celsius to 6,000° Celsius.

Explanation:

edge 2021

The number of legs and type of mouthparts can be used to separate a housefly, millipede and tick.

The number of legs and type of mouthparts are two structural features that can be used to separate a housefly, millipede and tick into their respective classes. Houseflies are insects and have three pairs of legs, or six legs total. They also have mouthparts designed for sucking and lapping up liquid food.

Millipedes are arthropods and have many pairs of legs, with each body segment having two pairs. They have mandibles designed for grinding up vegetation.

Ticks are arachnids and have four pairs of legs, or eight legs total. They have chelicerae for piercing the skin of their hosts and feeding on blood.

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In September the earth will be experiencing  an equinox

Equinoxes occur between March and September. When the Sun's rays strike the equator at midday and at a 90° angle, it is considered an equinox.  It stands for the idea that day and night have equivalent lengths. The sunset and dawn are separated by 12 hours everywhere on Earth. One may observe how quickly the sunset and dawn hours shift throughout the day the farther one goes from the equator.

Whereas, solstices occur in June and December. The contrary is visible close to the solstices. For a few days, both the sunset and sunrise appear to be constant. Over the course of the year, the time of day when the sun is directly overhead where one lives also gradually changes.

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Answer:

A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Most cells have one or more nuclei and other organelles that carry out a variety of tasks.

Explanation:

Answer:

vitamin A is essential because consuming too much supplemental vitamin A during pregnancy can cause birth defects.

Hope this helps!

Answer:

your answer would be d. sexual

Answer:

C

Explanation:

The kidneys are bean shaped organs about the size of an adult fist. Most people are born with two kidneys. They are located on each side of the backbone, against the back wall of the abdomen, at about the level of the lowest rib.

The liver detoxifies various metabolites, synthesizes proteins, and produces biochemicals necessary for digestion. Its other roles include the regulation of glycogen storage, decomposition of red blood cells, and the production of hormones. It is also the largest internal organ in the body.

When biological material becomes trapped in a molecular bubble  it can form various structures known as microspheres or protocells.

Microspheres are tiny spherical structures composed of organic molecules, such as proteins, lipids and nucleic acids. these molecules self-assemble to form a closed, membrane like boundary that encloses the biological material inside.

Microspheres can exhibit some properties of living cells, such as the ability to absorb and retain certain substances  but they lack the complex internal organization and metabolic processes found in actual cells

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hi!! i think the answer to your question is B. fertilization!!

i hope this helps, good luck!! <3

Answer:

Option A

Farming with GM plants that are resistant to chemical herbicides may lead to overuse of weed-killing compounds.

Calderón-Garcidueñas has conducted research on the impact of air pollution on the brain and cognitive function. Other scientists in Germany and Boston have also conducted studies that support her work and findings.

In Germany, a group of researchers conducted a study to investigate the effects of air pollution on brain structure and cognitive function in a large population of older adults. The study utilized neuroimaging techniques to assess brain volumes and cognitive tests to evaluate cognitive performance. The findings revealed a significant association between long-term exposure to air pollution and reduced brain volume in regions related to memory and learning. The study also found that higher levels of air pollution were associated with poorer cognitive performance in various domains.

In Boston, researchers focused on the impact of air pollution on children's brain development. They conducted a study involving a cohort of children and assessed their cognitive abilities using standardized tests. The study found that children exposed to higher levels of air pollution exhibited lower cognitive scores, particularly in areas related to attention, memory, and language skills. The researchers also observed structural changes in the brain, specifically in regions involved in cognitive control, in relation to air pollution exposure.

These studies from Germany and Boston provide additional evidence supporting Calderón-Garcidueñas' findings regarding the detrimental effects of air pollution on the brain and cognitive function. They reinforce the notion that long-term exposure to air pollution can lead to structural changes in the brain and have a negative impact on cognitive abilities. The collective findings highlight the importance of addressing air pollution as a public health concern and implementing measures to reduce pollution levels to safeguard brain health and cognitive development, particularly in vulnerable populations such as children and older adults.

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competition plays a very important role in ecology and evolution. The best competitors are the ones who survive and get to pass on their genes.