Restriction enzymes cut only at specific sites. Therefore, they are not useful for genetic cloning. True or false

Answer:

the Russian Federation, the United Kingdom, and the United States of America

Explanation:

Answer: The Treaty was opened for signature by the three depository Governments (the Russian Federation, the United Kingdom and the United States of America) in January 1967, and it entered into force in October 1967.

The slowdown of neural communication in multiple sclerosis (MS) results from the degeneration of the myelin sheath.

In MS, the immune system mistakenly attacks the protective myelin covering nerve fibers, causing inflammation and damage. This damage disrupts the normal flow of electrical impulses along the nerves, leading to slowed or blocked communication between the brain and the rest of the body.

As the myelin sheath degenerates, it forms scar tissue, or sclerosis, in the affected areas. This further impairs nerve signal transmission and can lead to a wide range of symptoms, including muscle weakness, coordination issues, and vision problems. The severity and progression of MS can vary greatly among individuals, and treatment options are focused on managing symptoms, reducing inflammation, and slowing disease progression.

In conclusion, the degeneration of the myelin sheath is responsible for the slowdown of neural communication in multiple sclerosis.

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Structure and Function. All cells contain genetic information in the form of DNA molecules. Genes are regions in the DNA that contain the instructions that code for the formation of proteins, which carry out most of the work of cells.

Answer:

D plants and algae that live near the surface

Explanation:

One of the main source of dissolved oxygen in the ocean is through the activities of plants and algae.

An individual with sedentary lifestyle might be at risk for hypokinetic diseases such as high blood pressure. Moderate physical activity such as walking and biking gives a great benefit to avoid such risk. Moderate physical activity can reduce major medical conditions that might lead to early death. Too little movement or activity might lead to hypokinetic diseases. Regardless of the intensity of the physical activity, it will lower the risk of an early death due to hypokinetic diseases.

Answer:Ocean Acidification Evidence: Difficult for some species to make shells , larger concentration, organisms prone to illness . Ocean warming evidence: Melting of glaciers, expansion of ocean volume, growing difficulty in absorbing

Explanation:

Ocean Acidification Evidence includes difficult for some species to make shells , larger concentration, organisms prone to illness. Ocean warming evidence encompasses melting of glaciers, expansion of ocean volume, growing difficulty in absorbing.

The massive amount of carbon dioxide absorbed by the ocean dissolves as carbonic acid in seawater.

This is known as ocean acidification, and it is literally causing a sea change that is threatening the basic chemical balance of ocean and coastal waters from pole to pole.

As greenhouse gases trap more solar energy, the oceans absorb more heat, resulting in higher sea surface temperatures and rising sea level.

Ocean acidification is the decrease in pH of ocean water caused by CO2 dissolution in water.

Ocean warming, on the other hand, is the long-term gradual increase in the average temperature of the Earth's atmosphere. Ocean acidification and global warming are both negative consequences of human activity.

Acidification of the Oceans Evidence: It is difficult for some species to make shells, there is a higher concentration, and organisms are prone to illness.

Melting glaciers, increased ocean volume, and increasing difficulty absorbing are all signs of ocean warming.

Thus, this is the match for the given scenario.

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Answer:

1:2:1

Explanation:

This question involves a gene coding for the possession or not of the muscle that confers the ability to roll one's tongue. The allele for ability to roll (R) is dominant over the allele for non-ability to roll (r).

According to this question, two heterozygous rollers (Rr) were crossed. The following gametes will be produced by each parent;

Rr - R and r.

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced: RR, Rr, Rr, and rr.

Since RR (1), Rr (2) and rr (1) are of three different genotypes, the genotypic ratio of the offsprings will be 1:2:1.

Answer:

thick layer of blubber

Explanation:

this is the only answer i could infer since you did not provide the adaptations hope it helps :)

this phase of mitosis is referred to as Metaphase

The spindle apparatus (represented by the lines) has completely formed, each spindle fibre is attached to the centromere of the chromosome. The chromosomes are lined up at the centre (equator) of the cell. This is for preparation of separation- prior to the next stages in which it becomes pulled apart.

spindle apparatus- all lines

spindle fibre- an individual line

centromere- the middle of the chromosome

chromsome- repesented as an X in the diagram

Answer:

Vacuole

Chloroplast

Cell wall

Explanation:

Answer:

D

Explanation:

Plants first go through photosynthesis, using sunlight and carbon dioxide. This creates glucose. It then releases oxygen into the atmosphere as a byproduct. To convert the glucose into usable energy, the plant goes through cellular respiration, which converts oxygen and glucose into ATP.

Answer:

1) Messenger RNA molecules contain ribose, and transfer RNA molecules contain deoxyribose.

2) Messenger RNA molecules function in carrying coded information to the ribosomes, and transfer RNA molecules function in carrying amino acids to the ribosomes.

The major difference between messenger RNA molecules and transfer RNA molecules is that messenger RNA carries the genetic information, while tRNA carries the amino acids.

RNA is ribonucleic acid. In the cell, different types of RNA are found, such as mRNA (messenger RNA), tRNA (transfer RNA), rRNA (ribosome RNA), SnRNA, miRNA, etc. mRNA, or messenger RNA, is formed from DNA. It carries the information of a cell. The three consecutive nucleotides of mRNA make up a codon. An example of a codon is AUG.

tRNA has a cloverleaf-like structure. It has different domains such as the TΨC loop, the DHU loop, the anticodon region, and at the 3' end it is attached to an amino acid. The anticodon of the tRNA reads the codon sequence of the mRNA and attaches the amino acids. For the AUG codon methionine is attached.

Hence, the main difference between the messenger RNA and transfer RNA molecules is that mRNA carries the message of the genetic material, while tRNA carries amino acids to express the genetic material on mRNA.

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Answer:

1.  Diffusion

2. Osmosis

3. Diffusion

4. Facilitated Diffusion

5. Osmosis

6. Diffusion

Explanation:

Facilitated Diffusion- Move molecules across the cell membrane in a passive transportation with  membrane protein.

Osmosis- Move water molecules from high concentration to low concentration.

Diffusion- Evenly spread molecules from high concentration to low concentration.

1. Gases move across the room with ease without energy.

2. Water enter skin cells allowing cells to grow and wrinkle without energy.

3. Gases move with ease without energy.

4. Glucose requires energy to transfer.

5. Water leaves throat when concentration outside of throat is less that that inside the trough so water moves outwards.

6. Oxygen is uses passive diffusion does not require energy and will with ease move in and through a cell.

Out of the options provided, the ozone hole and Earth's orbit do not directly contribute to climate change.

Ozone hole: The ozone hole refers to the thinning of the ozone layer in the Earth's stratosphere, primarily over the polar regions. While the depletion of the ozone layer is a significant environmental concern, it is distinct from climate change. Ozone depletion is caused by the release of chlorofluorocarbons (CFCs) and other ozone-depleting substances, which have harmful effects on the ozone layer but do not contribute significantly to global climate change. Earth's orbit: The Earth's orbit refers to its path around the Sun. Variations in Earth's orbit over long periods of time, known as Milankovitch cycles, influence climate patterns on geological timescales. However, these orbital variations occur over thousands to tens of thousands of years and are not responsible for the rapid climate changes observed in recent times.

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Answer:

Explanation:

It is transpiration but seeing as it isn't in the options the closest i can think of is osmosis though it doesn't sound right but sorry if its wrong

Telomerase, an enzyme responsible for maintaining telomeres, is most abundant in cells with high regenerative capacity or frequent cell division.

This includes embryonic stem cells, which have the potential to develop into any cell type, and germ cells involved in sexual reproduction. Telomerase activity is also observed in certain types of cancer cells, enabling their unchecked growth and division.

In contrast, most somatic cells in the body have low levels of telomerase, resulting in gradual telomere shortening with each cell division and eventual cellular senescence.

The presence of telomerase in specific cell types reflects their need to counteract telomere attrition and maintain cell viability, highlighting the significance of telomerase in cellular function and lifespan regulation.

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Answer:

hope that's satisfactory

The primary functions of whales include feeding, reproduction, communication, and migration.

Whales are primarily filter feeders or predators, depending on the species.

Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.

Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.

Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.

The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.

Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.

Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.

Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.

These migrations are driven by seasonal changes in food availability and environmental conditions.

In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.

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The statement "the sole (only) function of the gonads, the testes and ovaries, is the production of gametes, sperm and egg, respectively" is false.

While the gonads (testes and ovaries) do produce gametes (sperm and egg), they also have other important functions, such as the production of hormones that regulate various physiological processes in the body.

The gonads, testes and ovaries, are responsible for producing gametes, but they also have additional functions, such as hormone production. For example, the testes produce testosterone, which is important for the development of male secondary sexual characteristics and the maintenance of overall health. Similarly, the ovaries produce estrogen and progesterone, which are crucial for female reproductive health, menstruation, and maintaining overall well-being.

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Answer:

Cleaner burning than other fossil fuels, the combustion of natural gas produces negligible amounts of sulfur, mercury, and particulates. Burning natural gas does produce nitrogen oxides (NOx), which are precursors to smog, but at lower levels than gasoline and diesel used for motor vehicles.

Answer:

protein...

Explanation:

protein is made from DNA

DNA is transcribed into RNA which is further translated into protein

All plants require water for fertilization, including gymnosperms, ferns, mosses, and angiosperms.

During fertilization, the male gamete (sperm) from the pollen grain travels down the pollen tube and merges with the female gamete (egg) inside the ovule. This process requires water to facilitate the movement of the sperm and the growth of the pollen tube. In gymnosperms, fertilization occurs in the female cone, while in angiosperms, it takes place inside the ovary of the flower. Ferns and mosses have a different method of fertilization, but water is still necessary to transport the sperm to the egg. In ferns, the sperm are flagellated and swim through a film of water to reach the egg, while in mosses, the sperm swim through a thin layer of water on the surface of the moss plant.

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Answer:

bye

Explanation:

Answer: Its A

I had this homework a few weeks ago

The gravitational potential energy of A will be equal to B. So the correct option is A.

Since it takes effort to lift items out of the gravitational pull of the Earth, gravitational energy is the potential energy associated with gravitational force. Water in a raised reservoir or maintained behind a dam serves as proof of gravitational potential energy, which is caused by elevated situations. The gravitational force will do positive work on an item if it falls from one point to another inside a gravitational field, and the gravitational potential energy will also drop by the same amount.

Think of a book that is perched atop a table. Some external force opposes the gravitational pull when the book is lifted from the floor to the table. The gravitational pull provides the "falling" energy that the book experiences if it drops back to the ground. This potential energy is then transformed into kinetic energy if the book were to fall off the table and accelerate its mass. This kinetic energy is transformed into heat and sound by the impact when the book hits the ground.

The height of an item in relation to a reference point, its mass, and the gravitational field's intensity all have an impact on how much gravitational potential energy it has. The gravitational potential energy of a book on a table is, therefore, lower than that of the same book on top of a higher cabinet and lower yet than that of a heavier book on the same table.

Therefore the correct option is A.

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A possible phenotype for a cross between PpYY and ppYy pea plants is plants with purple flowers and yellow peas.

This is because the purple flower trait (P) is dominant over the white flower trait (p), and the yellow pea trait (Y) is dominant over the green pea trait (y). Both of the plants in the cross are heterozygous, meaning they carry one allele of the dominant trait and one allele of the recessive trait. When the two plants are crossed, their alleles will mix and produce offspring with a combination of the traits.

Since both the purple flower and the yellow pea traits are dominant, the offspring will likely have purple flowers and yellow peas. In order for the offspring to have white flowers and green peas, both of the parental plants would need to be homozygous recessive for their respective traits.

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Answer:

usually once a month

Explanation:

The full moon is the lunar phase when the Moon appears fully illuminated from Earth's perspective. This occurs when Earth is located between the Sun and the Moon (more exactly, when the ecliptic longitudes of the Sun and Moon differ by 180°).