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Base your answer on the passage below

Avian (Bird) Flu

Avian flu virus H5N1 has been a major concern recently. Most humans have not been exposed to this strain of the virus, so they have not produced the necessary protective substances. A vaccine has been developed and is being made in large quantities. However, much more time is needed to manufacture enough vaccine to protect most of the human population of the world.

Most flu virus strains affect the upper respiratory tract, resulting in a runny nose and sore throat. However, the H5N1 virus seems to go deeper into the lungs and causes severe pneumonia, which may be fatal for people infected by this virus.

So far, this virus has not been known to spread directly from one human to another. As long as H5N1 does not change to another strain that can he transferred from one human to another, a worldwide epidemic of the virus probably will not occur.


3.Identify one event that could result in the virus changing to a form able to spread from human to human.

Answer:

2...I think

Explanation:

I believe it is 2, because asexual reproduction takes a long time.

Answer:

D. Chlorofluorocarbons

Explanation:

Chlorofluorocarbons are normally harmless but during combustion it releases an acidic oxide to the atmosphere, it was widely used in the 1900s but due to the hole created in the ozone layer in the South and North poles it was banned from being used in refrigators and air conditioners

Answer:

1.) Particles in a solid have fixed locations in a volume that does not change. • Solids have a definite volume and shape because particles in a solid vibrate around fixed locations.

2.) It's a process called sublimation. The easiest example of sublimation might be dry ice. Dry ice is solid carbon dioxide. When you leave dry ice out in a room, it just turns into a gas.

Answer:

A) A cactus cell

Explanation:

Plant cells have much larger vacuoles than animal cells, so I believe the cactus cell would have the largest one.

Answer:

The genotype "Tt" in a Punnett square represents heterozygous pea plants, meaning they have one dominant allele and one recessive allele for a particular trait.

Explanation:

Answer:

most of the time it is fish skeletons

Explanation:

Answer:

Im pretty sure its Lichens

Explanation:

Answer:

A whole skeletal muscle classifies as an organ of the muscular system. Each organ or muscle has skeletal muscle tissue, nerve tissue, blood or vascular tissue, and connective tissue.

The different organs in the muscular system include cardiac muscles, smooth muscles, skeletal muscles, connective tissue, nerve tissue and blood tissue Rhythmic contractions cover the heart’s wall. It is responsible for the beating of the heart. The skeletal system allows the body to extend and contract.

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Answer:

C

Explanation:

Answer: C

Explanation:

DNA stands for deoxyribonucleic acidTrusted Source. It contains units of biological building blocks called nucleotides.

DNA is a vitally important molecule for not only humans but also most other organisms. DNA contains our hereditary material and our genes, the things that make us unique.

Answer: D is the answer.

Explanation: Carbon dioxide significantly impacts the global temperature, and is partially the reason why it has been increasing over the past 100 years.

Answer: I think the answer would be D miohippus

Explanation:

Miohippus would be found in the uppermost layer of rock. Therefore, option (B) is correct.

Miohippus is an extinct genus of early horse that lived in North America during the Miocene epoch, around 23 to 5 million years ago. It was a small, three-toed horse that was slightly larger than its predecessor, Mesohippus.

Miohippus had a relatively short face, with a long, narrow skull and teeth that were adapted for grinding tough vegetation. It is believed that Miohippus was the ancestor of the modern horse, and that its evolution was characterized by an increase in size, a reduction in the number of toes, and changes in the shape of the skull and teeth that allowed for a more efficient grazing diet.

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Answer:

level consumers in the food chain are carnivores (flesh-eating), insectivores (insect-eating), or omnivores (flesh-and plant-eating). A wetland example of a food chain: pickleweed, is eaten by salt marsh harvest mice, which are eaten by clapper rails, which are eaten by peregrine falcons.

Explanation:

Answer: A or D, mostly D

Explanation:  I say this because if they have something that's theirs, they are gonna mark their territory. just like a dog. They want other dogs ( other animals) to know that that's their domain. If it wrong please say so.

Answer:

The best description of the likely impact of an invasive plant species on a warm ecosystem is:

The invasive plant species take over resources used by native plant species. Some plant species decrease in population, affecting the food source for consumers in the ecosystem.

Invasive plant species have the ability to outcompete native plant species for resources such as sunlight, water, and nutrients. This can lead to a decrease in the population of native plant species as they are unable to access sufficient resources to thrive. As a result, the food source for consumers in the ecosystem may be affected, leading to potential changes in the population dynamics of the consumer species.

Answer:

X = 120

Y=  710

Z=   620

Explanation:

The Density of Rocks Part A Nguyen uses a triple beam balance to measure the mass of each rock. Read the values on the balance for rocks X, Y, and Z. Rock Balance Reading of Rock Mass (g) X triple beam part of mass balance with top beam with pointer at 20, middle beam with pointer at 0, and lowest beam with pointer at 1 Y triple beam part of mass balance with top beam with pointer at 10, middle beam with pointer at 0, and lowest beam with pointer at 7 Z triple beam part of mass balance with top beam with pointer at 20, middle beam with pointer at 0, and lowest beam with pointer at 6

Answer:

S - Savannas are typically found in tropical or subtropical regions.

S - Savannas tend to have more trees and shrubs.

S - Savanna's climate is drier than that of a grassland.

G - Grasslands are found in temperature regions.

G - Temperature Grasslands are mainly devoid of trees, receive less rainfall than Savannas & endure broader temperature extremes.

G - Grasslands make up 25 percent of the Earth's land surface and dominate in regions with limited rainfall, which prevents forest growth. This results from nearby mountain ranges that cause rain shadows over adjacent open-range lands.

B - Both represent the world's richest and most diverse ecosystems. They both provide a home for a quarter of the world's population and a habitat for thousands of plants and animals.

B - Many species gather in vast numbers, graze on the varied grasses, and can be found nowhere else on Earth. The coexistence between wildlife and grasses is key to healthy ecosystems. Animal migrations regenerate the landscapes, by controlling pests, dispersing seeds, and trampling invasive species. Through this partnership, grasslands and savannahs generate vital benefits for both people and nature.

B - Ecosystems such as these two in specific are essential for climate mitigation – they store carbon, locking it deep in the soil and extensive root systems. They are the source of or support many of the world’s biggest rivers and wetlands, ensure food security, support livelihoods, and are embedded in the cultural identity of millions of people.

(Also, A savanna or savannah is a mixed woodland-grassland<---similarity)

Explanation: Just research. I decided to state 3 characteristics for both The Savanna and The Grasslands, and then 3 for "B" (both).

Answer:

b) a tail fin

d) two fins on its back

Explanation:

 The traits that can be observed on the fossil of the Holophagus are a tail fin and two fins on the back. These adaptations suggest that Holophagus was well adapted for an aquatic ocean lifestyle, possibly indicating that it was a proficient swimmer.

The presence of both tail fin and back fins would have provided Holophagus with increased maneuverability and control in the water, allowing it to navigate its environment with ease.

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Answer:

. How do forces affect both plants and animals?

Gravity affects everything, both living and non-living things. For animals on Earth (like you), gravity determines which direction is down and up.  

. What forces act on or within plants?

Forces, including gravity, are constantly acting upon plants and cause them to be in motion. Plants can be in motion just like we are in motion.  

What is turgor pressure?

urgor pressure is the force within the cell that pushes the plasma membrane against the cell wall

What happens to a plant with low turgor pressure?

Turgor pressure in plants. Turgor pressure within cells is regulated by osmosis and this also causes the cell wall to expand during growth.  

What must a seedling do in order to emerge through the soil?

he most common pattern is where the cotyledons are raised above ground as the seedling emerges. The seedling forms a hypocotyl hook that pushes through the soil.

Compare the turgor pressure of a cell to a water balloon.

When the turgor pressure in a cell is high, it will be swollen and firm from the water inside.

If flowers begin to wilt, is there anything that can be done to save them?

Add three teaspoons of sugar to the lukewarm water in your vase, and place the wilted flower in and let it sit. The sugar will perk them right up! 3. Sprinkle a few drops on the center of the head of the flower.

Explanation:

1.) This is what I found when looking it up: Gravity affects everything, both living and non-living things. For animals on Earth (like you), gravity determines which direction is down and up. Like you, plants can feel and react to gravity. They make sure that their roots go down and leaves go up - even their seeds are planted upside-down.

Answer:

1.a. Omnivores, Carnivores, and Herbivores.

1.b. Foxes, Tigers, and Deer.

2.a. A photosynthetic organism (such as a green plant or a cyanobacterium) that utilizes energy from light to synthesize organic molecules Green plants that convert carbon dioxide into carbohydrates in the presence of sunlight are called photoautotrophs.

2.b. Maize Plant.

3. Chemoautotrophs made their food by themselves using the energy from the sun. This means that an ecosystem that depends on chemoautotrophs for food is dependent on sunlight for food and survival because chemoautotrophic organisms are the primary producers in that ecosystem.

4. Decomposers are organisms that break down dead plants or animals into the substances that plants need for growth.

5.a. They keep an ecosystem free of the bodies of dead animals, or carrion. Scavengers break down this organic material and recycle it into the ecosystem as nutrients.

5.b. Turkey Vulture.

Answer: The duties that the students and community members have to be done to save our environment and resources

Explanation: My part as a students

1. Switch off classroom lights and fans when not in use.

2. Plant a tree (in vacant lot / backyard).

3. Join environment friendly groups.

4. Switch to non- plastic water bottles.

5. Switch off faucets in the school or park when not in use.

My initiative as a Community Member

1. Conserve water.

2. Throw garbages in the trash can.

3. Decrease the amount of paper you print.

4. Minimize the use of plastic when buying good

5. Volunteer for clean-up drives.

The correct options that have to be filled in its appropriate column are:

The part as a Student in conserving the environment.

Volunteer for clean-up drives.

Thus, these are the correct options for the given columns.

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Answer:

Aspen

Explanation:

I think you just multiply the measurements to get the volume and then yo divide that by the product of the measurements

( I think its that don't take my word for it. Wait for someone else to answer maybe) :)

Answer:

The molecules are moving from high to low concentration.

Explanation:

Answer:

Explanation:

Gregor Mendel used thousands of pea plants in his experiments to ensure that his results were accurate and reliable. By using a large sample size, he was able to reduce the effects of chance and random variation in his experiments. This is important because biological systems are complex and variable, and small sample sizes can lead to inaccurate or misleading results.

Mendel's experiments involved crossing pea plants with different traits (e.g., tall vs. short, yellow vs. green), and he counted the number of offspring with each trait. He found that the offspring followed predictable patterns of inheritance, which he summarized in his laws of inheritance.

If Mendel had used only twenty plants in his experiments, he may not have obtained the same results. With a small sample size, chance events can have a greater impact on the results. For example, if he crossed two pea plants with different traits and obtained only a few offspring, it's possible that chance events (such as mutations or environmental factors) could have influenced the results. This could lead to false conclusions about the inheritance of the traits.

Therefore, using a large sample size was critical to Mendel's success in developing his laws of inheritance. It allowed him to detect patterns that were consistent across many different crosses, and to demonstrate that these patterns were not the result of chance variation.