4. How do viruses reproduce?


5. What is a provirus?


6. What makes viruses difficult to cure?


7. What is unique about the HIV virus?

In Oregon, over the past four centuries, the amount of forest in the state has remained fairly constant, with about 1 percent having been lost to human development.

Deforestation is the removal of trees and forests from a particular area, whether for commercial or personal use. Deforestation can occur for various reasons, including agriculture, logging, mining, urbanization, and natural disasters.

Deforestation has numerous negative environmental impacts, such as soil erosion, loss of biodiversity, increased greenhouse gas emissions, and climate change. It can also have adverse effects on human societies, including the displacement of indigenous people and the destruction of their cultural and economic systems.

Oregon has approximately 30.4 million acres of forest land, accounting for 47% of the state's total land area and has lost about 1% to deforestation.

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Answer:

hypotonic= cell grows

hypertonic=cell shrink

Explanation:

By poisoning customers at every stage of the food chain, is the right response (A). This is due to the fact that marine creatures in the bay absorb large amounts of poisons when they are created by phytoplankton and tiny marine algae.

Then, as the toxins go up the food chain, each succeeding organism becomes progressively more contaminated. Since the poisons will gradually make the marine species sick and die, this will eventually result in a drop in the numbers of marine organisms in the bay.

The marine species' immune systems may also be weakened by the poisons, rendering them more vulnerable to illness and other environmental pressures.

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Here is a written representation of the food web:

Grass → Grasshopper → Mouse → Snake → Hawk → Owl

↓

Rabbit

↓

Chipmunk

↓

Songbird

↓

Worm → Berry Bush

In this food web, the arrows represent the flow of energy and consumption. Each organism in the food web relies on another organism for food. The primary producers are grass and the berry bush. The grasshopper feeds on grass, and the mouse feeds on the grasshopper.

The snake preys on the mouse, and the hawk preys on the snake. The owl preys on the hawk. The rabbit and chipmunk are herbivores that directly consume grass. The songbird feeds on chipmunks and rabbits, while the worm helps decompose organic matter and the berry bush provides food for the worm.

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Answer:

monera kingdom

Explanation:

Answer:

The kingdom is Monera Kingdom

Explanation:

Answer:

the physical barrier that encloses the nucleus, called the nuclear envelope, breaks down.

Explanation:

Prometaphase is the second phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prometaphase, the physical barrier that encloses the nucleus, called the nuclear envelope, breaks down.

Answer:the nuclear envelope begins to break down and the microtubule spindle fibers emerging from the centrosomes begin to enter the nuclear area of the cell

Explanation:trust me I’m the smartest man alive.. and got it right on my test

The best evidence that the biochemists' hypothesis about this compound is

correct will be lack of growth in the onions.

The centrioles and microtubules are important during the process of cell

division(mitosis) by organisms. They ensure that the cells divide properly

which helps cells to grow.

The compound being hypothesized to disrupting the activities of the

centrioles and microtubules means lack of growth will signify that it is

correct and the most appropriate choice.

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Here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.

Here, the control group is the group of plants that are not exposed to stress, and the control groups plants are experimented or tested with the other plants to get the result of the stress hormone on the plants.

Hence, here, the hypothesis is "plants communicate with their neighbors in response to stress", dependent variable is the amount of the stress hormone in the plants, and the independent variable is the exposure to stress (applied 3 times a day for 10 days), standardized variables are plants used, duration of the stressor, amount of stress hormone. The control group is the plant that is not exposed to stressor.

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The brain and spinal cord are part of the central nervous system.

The electrical charges that act as nervous signals are called action potentials or nerve impulses.

Jellyfish do not have a brain. Instead, their nervous system is called a nerve net.

After nervous systems began to develop in bilaterally symmetric animals, some developed ventral nerve cords, while chordates developed dorsal nerve cords.

Skeletons that allow for movement by using muscles and squeezing liquid to change the body shape are called hydrostatic skeletons.

Exoskeletons do not grow with arthropods, and so occasionally must be shed and regrown from chitin.

Muscles move endo- and exoskeletons by contracting and relaxing.

Fertilization is the joining of two gametes called sperm and egg.

A fish that lays her eggs in a cluster is initiating cluster or mass fertilization.

Amniotic eggs are an adaptation by reptiles to allow for reproduction and embryo development on land.

Describe three different strategies used by three different animals to thermoregulate.

If you see a snake coiled up in a sunny patch of grass, what can you probably conclude about the type of thermoregulator it is. Why?

If you see a snake coiled up in a sunny patch of grass, you can probably conclude that the snake is an ectotherm. Ectotherms rely on external heat sources, such as the sun, to regulate their body temperature. By basking in the sun, the snake absorbs heat, which helps raise its body temperature to a suitable level for proper physiological functioning.

Answer:

1. central

2. action potential

3. nerve net

4. dorsal

5. hydrostatic

6. Exoskeletons

7. contraction/contracting

8. Fertilization

9. external fertilization

10. Eggs

11. Animals with fur thermoregulate by panting. Winged birds will flap against their mouths/heads to dissipate heat. Humans will produce sweat to evaporatively cool. Polar bears have developed blubber. Bears drop body temperatures during hibernation.

12. Seeing a snake using the warmth of the sun leads us to conclude that it is likely a thermo conformer that cannot produce its own body heat.

detergent, acid, abrasive and degreasers.

I hope it helps you

Answer:

Synthetic, cotton

Explanation:

Synthetic fabric wrinkles less than cotton fabric.

Wrinkle is known to be an unusual fold, ridge or crease in the cloth. Some cloth experience this type of wrinkle why some do not. The material of the cloth determines its ability to wrinkle.  Synthetics are known to be more wrinkle resistant than cotton and even linens. 100% linen or a blend of cotton/linen. Even polyester clothes are more wrinkle resistant than cotton.

The main reason mentioned in the chapter for mammals surviving the K-T extinction is that there was not the competition with the dinosaurs.

The main reason mentioned in the chapter for mammals surviving the K-T extinction is that there was not the competition with the dinosaurs.

Therefore, the absence of competition with dinosaurs is identified as a significant factor that contributed to the survival and subsequent success of mammals during the K-T extinction event.

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The figure associated with the "wave" theory of insect infestation in the development of forensic entomology is option D. John Pierre Megnin.

French entomologist John Pierre Megnin pioneered the "wave" theory in forensic entomology, which explains the progression of insect activity on decaying remains.

Megnin noted that insects follow a predictable sequence when colonizing a dead body. Colonization happens in waves, with different types of insects attracted to the decaying remains at varying stages.

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Answer:

1. Photosynthesis

2. Oxygen

3. Glucose

4. ATP?

5. Cellular respiration.

Explanation:

Hope this helps. Sorry if some of these are wrong.

Ephyra of Aurelia and Medusa of Obelia are both jellyfish species, but Ephyra is a stage in the life cycle of Aurelia while Medusa is the reproductive phase of Obelia.

Ephyra and Medusa are two species of jellyfish, but they are very different in terms of their appearance, habitat, and behavior.

Aurelia aurita, also known as the moon jellyfish, is a translucent, bell-shaped species that is commonly found in temperate waters. It is not considered dangerous to humans and feeds on plankton, algae, and small organisms.

Obelia medusa, on the other hand, is a colonial species of hydrozoans that form clusters of tentacle-bearing polyps. They are found in colder waters, primarily in the northern hemisphere. Unlike the moon jellyfish, Obelia medusa is capable of producing a venom that can cause pain and skin irritation in humans.

In conclusion, Ephyra and Medusa are two distinct species of jellyfish that are unique in their own ways. Ephyra is peaceful and translucent, while Medusa is a dangerous colonial species capable of producing venom.

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Answer:

option 3

Explanation:

Copper is a transition metal with two possible ionic states (copper I, or 1+, and copper II, or 2+).

There are two forms for writing the chemical formula because copper is a transition metal with two possible ionic states (copper I, or 1+, and copper II, or 2+)

Copper is a transition metal with variable oxidation states. The oxidation states of copper is what determines the name of CuS and Cu₂S.

Now, we shall determine the oxidation states of copper in each compound.

For CuS:

CuS = 0

S = –2

Cu + S = 0

Cu + (–2) = 0

Cu – 2 = 0

Collect like terms

Cu = 0 + 2

For Cu₂S:

Cu₂S = 0

S = –2

2Cu + S = 0

2Cu + (–2) = 0

2Cu – 2 = 0

Collect like terms

2Cu = 0 + 2

Divide both side by 2

Cu = 2/2

From the calculations made above, we can see that copper has oxidation state of +2 in CuS and +1 in Cu₂S

Thus, we can conclude that Copper is a transition metal with two possible ionic states and this accounts for the different names of CuS and Cu₂S

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Based on the position of the Earth, moon, and Sun in the image above, a spring tide will occur during a new moon or full moon because the gravitational attraction between the Sun and Moon on the water is the strongest and is denoted as option D.

This is referred to as a phenomenon where the sun and the moon are in line with each other which results in the pulling of the ocean's surface in the same direction.

This causes high tides known as spring tides and is therefore the reason why option D was chosen.

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Observing each of the animals shown we have to classify what each one of them has that differs from the other in this way, the evolutionary process of each one is:

Evolutionary processes aim, therefore, to generate greater adaptation of species in an environment. This concept of adaptation is related to several other evolutionary processes, mainly speciation, when new species of organisms are formed from gradual changes in preexisting species.

In this case, the most evolved species to the most evolved is:

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Explanation:

Because you're only 175 cm long, you will have to be atleast 250 cm long to look tall

Answer:

The average height for a 14 year old male is 5ft 4.5in (163.8 cm). In most cases, boys height measurements for this age group will lie within the range between 148.53 and 178.82 cms.

Explanation:

You're not short :)

Answer:

C

Explanation:

2Mg + O2 → 2MgO

got it right on edge 2020

Considering the law of conservation of matter, the correct answer is third option: 2 Mg + O₂ → 2 MgO

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts.

So, in the case of Mg + O₂ → MgO, you have:

The coefficients of each molecule below indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.

So, balancing the O to obtain the same amount in the reactants and products you get:

Mg + O₂ → 2 MgO

So you have:

Since you still don't have the same amount of Mg on both sides, the equation is not balanced. Therefore, balancing the equation again:

2 Mg + O₂ → 2 MgO

So you have:

Now you have the same amount of each element on each side of the reaction, so the reaction is balanced.

Finally, the correct answer is third option: 2 Mg + O₂ → 2 MgO

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The distance d to the farthest point B that will be watered and the corresponding angle a when the vegetables are just beginning to grow is 6.42m and when the height h of the corn is 1.8 m is 32.77 m.

Given initial velocity of water sprinkler (v0) = 8m/s

The distance the water will be sprinkled = d

The angle at which the water will be sprinkled = a

For (a), we can use the equation for the range of a projectile with an initial velocity v0 and angle θ, which is:

R = (v0^2 sin(2θ))/g where g is the acceleration due to gravity.

Since we know the initial velocity v0 and the angle θ, we can calculate the distance d to the farthest point B. For (a), when the vegetables are just beginning to grow, the angle θ can be assumed to be 45°. Substituting the values into the equation above, we get:

d = (v0^2 sin(90°))/g

d = (8^2 sin(90°))/9.81

d = 6.42 m

For (b), the height h of the corn is 1.8 m. We can use the same equation, but now the angle θ needs to be calculated. We can use trigonometry to calculate the angle θ, as follows:

θ = sin^-1(h/d) where h is the height of the corn and d is the distance to the farthest point B.

Substituting the values into the equation above, we get:

θ = sin-1(1.8/d)

d = (8^2 sin(θ))/9.81

Rearranging the equation to solve for d, we get:

d = (8^2 sin(sin-1(1.8/d)))/9.81

d = 32.77 m

Using the value of d, we can calculate the angle θ:

θ = sin-1(1.8/d)

θ = sin-1(1.8/32.77)

θ = 18.3°

Therefore, the distance d to the farthest point B that will be watered is 32.77 m and the corresponding angle a is 18.3° when the height h of the corn is 1.8 m.

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complete question: an oscillating garden sprinkler which discharges water with an initial velocity v0 of 8 m/s is used to water a vegetable garden. Determine the distance d to the farthest point B that will be watered and the corresponding angle a when (a) the vegetables are just beginning to grow, (b) the height h of the corn is 1.8 m.

Answer:

Biodiversity is defined as “the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems.” The importance of this definition ...

Answer:

Mammalia is the class of Whale.

Answer:

the desert

Explanation:

Answer:

an electron is exited

Explanation:

as the electrons are released into the system of electron carriers involved with photosystem two, they lose their energy

Corvus corax, also known as common Raven, or just raven is a widely distributed bird, it can be found in the northern hemisphere, hence a variety of habitats though can be found on woodlands and coastal zones. The common raven also possesses a wide diet, is omnivorous, it can feed on carrion, insects, leftovers, grains, fruits, and small animals, so it possesses multiple links on the food webs, nonetheless can be classified as a secondary consumer. Finally, the raven has proven to be an extremely intelligent bird capable of solving certain problems and puzzles, also it has played a significant role in literature.