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Activity 1:
Directions:
Match the descriptions in Column A with the parts of the nervous
system in Column B. Write only the letter of the correct answer in your
Science journal.
B
a. sympathetic nerve
b. neurons
A
1. It serves as the functional unit of the
nervous system.
2. It collects information from the sense organ
such as the eyes and the nose.
3. It serves as the primary organ of the
central nervous system.
4. It controls or regulates body's internal brain
environment, including the body temperature,
pulse and respiration rate, and bood pressure.
5. It is one of the systems that is directly involved
c. peripheral nervous
system
d. nervous system
e. automatic nervous
system
in maintaining normal functions of cells.
f. spinal cord​

The generation time of the bacteria in the following culture is approximately 3.01  hours.

To determine the generation time of bacteria, we can use the formula:

Generation time (t) = (Time elapsed (T) / Number of generations (n))

In this case, we have a time difference of 10 hours between the two samples.

To calculate the number of generations, we can use the formula:

Number of generations (n) = log(N₂ / N₁) / log(2)

Where N₂ is the final cell count (10,000 cells/ml) and N₁ is the initial cell count (1,000 cells/ml).

Plugging in the values, we get:

Number of generations (n) = log(10,000 / 1,000) / log(2) ≈ 3.32

Now, we can calculate the generation time:

Generation time (t) = Time elapsed (T) / Number of generations (n)

Generation time (t) = 10 hours / 3.32 ≈ 3.01 hours

Therefore, the generation time of the bacteria in this culture is approximately 3.01 hours.

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Answer:

Photosynthesis

Explanation:

Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive. Carbon dioxide, water, and light are all needed for photosynthesis to take place.

Good luck!

Answer:

pH = 3.215

Explanation:

From the given information;

Using the equation for the dilution of  a stock solution:

Since moles of C5H5N = moles of HNO3

Then:

\(M_{C_5H_5N}\times V_{C_5H_5N}= M_{HNO_3}\times V_{HNO_3}\)

\(0.0750 M \times 2.65 L = 0.407 M \times V_{HNO_3}\)

\(V_{HNO_3}= \dfrac{0.0750 M \times 2.65 L}{0.407 M}\)

\(V_{HNO_3}=488.33 \ mL\)

The reaction between C5H5NH and H2O is as follows:

\(C_5H_5N^+H + H_2O\) ⇄ \(C_5H_5N + H_3O^+\)

\(Molarity \ of \ C_5H_5N^+H = \dfrac{moles}{addition \ of\ the\ total\ volume}\)

\(Molarity \ of \ C_5H_5N^+H = \dfrac{0.0750 \ M \times 2.65 \ L}{2.65 \ L + 0.48833 \ L}\)

\(Molarity \ of \ C_5H_5N^+H = \dfrac{0.19875 \ ML}{3.13833 L }\)

\(= \ 0.06333\ M\)

Now, the next step is to draw out the I.C.E table.

    \(C_5H_5N^+H + H_2O\) ⇄ \(C_5H_5N + H_3O^+\)

I       0.06333                      0          0

C        - x                               x          x  

E      0.06333 -x                   x          x

\(K_a = \dfrac{10^{-14}}{1.7 \times 10^{-19}} \\ \\ K_a = 5.8824 \times 10^{-6}\)

\(K_a = \dfrac{[C_5H_5N][H_3O^+] }{[C_5H_5N^+H] } \\ \\ 5.8824 \times 10^{-6} = \dfrac{x^2}{0.06333 - x}\)

Assuming x < 0.06333

\(x^2 = 5.8824 \times 10^{-6} \times 0.06333\)

Then

\(x^2 = 3.72532392 \times 10^{-7} \\ \\ x= \sqrt{3.72532392 \times 10^{-7}} \\ \\ x = 6.1035 \times 10^{-4} \ M\)

\([H_3O^+] = x = 6.1035 \times 10^{-4} \ M \\ \\ pH = -log (6.1035 \times 10^{-4}) \\ \\ \mathbf{\\ pH = 3.215}\)

The pH for  HNO3 needed to reach the equivalence point in the titration of 2.65 L of 0.0750 M pyridine (C5H5N, Kb = 1.7 × 10−9) is

HNO3 + C5H5N→CSH5NH + + NO3

Moles of C5H5N = volume x concentration

=2.65 x 0.0750

=0.1987 mol

Moles of HNO3 needed = moles of C5H5N = 0.19875 mol Volume of HNO3 eeded = moles / con

=0.19875/0.54

=0.363L

=363 mL

At the equivalence point, most effective C5H5NH + a NO3-are Moles of C5H5NH+ = moles of C5H5N = 0.19875 mol

Total extent of answer n = 2.65 + 0.363 =3.013 L

Initial concentration [ C5H5NH + ] o = moles/ volume =0.19875/3.013 =0.06596 M

Kb of C5H5N = 1.7 x 10 ^  9

By fixing the equation,

H + = 6.199 * 10 ^ 4 M

pH=-log[H+]

=3.207

=3.21 pH

The pH is the degree of ways acidic or simple a substance is. In humans, pH stability performs a position in preserving the frame functioning optimally. The best pH of the frame is barely alkaline, which helps sure biochemical reactions like oxygenating the blood.

Thus it is clear above.

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With the help of polymerase chain reaction, can scientists produce multiple copies of the GFP gene for medical applications.

The polymerase chain reaction is a method widely used to rapidly make millions to billions of copies of a specific DNA sample.

PCR is based on three simple steps required for any DNA synthesis reaction: (1) denaturation of the template into single strands; (2) annealing of primers to each original strand for new strand synthesis; and (3) extension of the new DNA strands from the primers.

As PCR progresses, the DNA generated is itself used as a template for replication, setting in motion a chain reaction in which the original DNA template is exponentially amplified.

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Answer:

1

Explanation:

it's not the answer, disregard this.

Answer: 4) all of the above

Explanation: You can use taste to taste a juice (a liquid), you can use your sight to look at rocks (a solid), and you can use your sense of smell to smell smoke (a gas)

The Earth collided with a body the size of Mars to create the moon. Planetesimals collided and combined to create the moon. Earth's gravity pulled the moon into its orbit as it passed by.

The theory that is currently accepted most frequently is the giant-impact idea. This hypothesis states that the Moon resulted from a collision between the Earth and a smaller planet, around the size of Mars. The debris from the impact that remained accumulated in an orbit around Earth to form the Moon.

The most widely accepted theory for the origin of the Moon dates back 4.5 billion years and involves a body the size of Mars crashing into Earth. Our natural satellite, which is 384,000 kilometers (239,000 miles) from Earth, was formed as a result of the buildup of dust from both Earth and the impactor.

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Explanation:

-Cell membrane is a selectively permeable membrane which is made up of phospholipid arranged in a bilayer.

-Therefore it allows lipid soluble or hydrophobic molecules and gases like oxygen and carbon dioxide to diffuse through the membrane rapidly.

-Ethanol which is a polar molecule can also cross the membrane but at a slow rate.

-On the other hand cell membrane restricts the entry of highly charged molecules like some ions, sugars and amino acids (they require special transport proteins).

Answer:

Allowed to pass:

Water molecules

O2

CO2

Ethanol

Kept out:

Some ions

Sugars

Amino acids

The jaws of arthropods are considered modified appendages because they have evolved into multiple forms adapted to various modes of feeding.

Appendages of arthropods are the external features of projections from the head or body segments used for feeding, mobility, piercing, chewing, sucking and admonition. Arthropods have modified jointed paired appendages where their ancestral forms would have had more legs.

Unlike the annelids, arthropods' jointed appendages give them greater flexibility and range of movement. The appendages are found in the mouthparts, antenna, legs. Some of these organisms are crustacean, arachnids, insects, etc.

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Answer:

D.

hypothalamus

Explanation:

edge

All the structures above indicated are included in the forebrain EXCEPT the CEREBELLUM (Option A).

The forebrain (also known as the prosencephalon) is the largest region of the brain.

The forebrain is composed of the cerebrum (telencephalon), thalamus, hypothalamus, pineal gland and limbic system.

The cerebrum is recognized to be the biggest portion of the brain.

On the other hand, the cerebellum is a brain structure located between the brainstem and the cerebrum.

The functions of the cerebellum include motor abilities, sensory perception and body posture/balance.

In conclusion, all the structures above indicated are included in the forebrain EXCEPT the CEREBELLUM (Option A).

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Some limiting factors that the Orca population experienced while in captivity include food and dissolved oxygen.

This refers to any variable or factor in the environment which limits the population expansion of a given species.

In the case of Orca they are present in the sea and need food and dissolved oxygen to survive which is why it acts as a limiting factor due to their absence causing a decline in population.

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The field of study that involves all the elements of plant structure and metabolism that allow plants to sustain life and reproduce is "plant systems".

Plant systems is the scientific field that studies the internal and external structures of plants, their physiological processes, and their interactions with the environment. It involves the study of plant anatomy, plant physiology, plant ecology, and plant development.

Plant anatomy deals with the structure and organization of plant tissues, organs, and cells, while plant physiology studies the functions and processes that occur within the plant, such as photosynthesis, respiration, and nutrient uptake.

Plant ecology examines the relationships between plants and their environment, including interactions with other organisms, while plant development focuses on the growth and differentiation of plant cells, tissues, and organs throughout their life cycle.

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A. Plant systems

The field of study that involves all the elements of plant structure and metabolism that allow plants to sustain life and reproduce is commonly known as plant systems.

Plant systems include :

Therefore, The study of plant systems aims to understand how plants function at the molecular, cellular and organismal levels and how they interact with their environment. This knowledge is important for improving crop yields developing new plant-based products, and addressing global challenges such as food security and climate change.

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Answer:

C. Science

explanation:

Because they did not know want Science was

Answer:

The carbon cycle refers to the procedure in which the atoms of the carbon are recycled again and again on Earth. Carbon recycling occurs within the biosphere of the Earth and between the nonliving environment and living things.  

In case if I were a carbon, then I would have originated from fossil fuels and left the ground, through the process of photosynthesis I would have entered the trees, I would have consumed by animals, even I would have released from some of the trees or plants that dies, I would have also released from animals by the process of decomposition after their demise, and animals can even breathe me in out by the process of respiration.  

Explanation:

Answer:

The rate at which trees grow varies depending on the species, environment, and other factors. Some trees can grow up to several feet per year, while others grow more slowly.

Answer:

Most people with a single kidney live a normal life without developing any long- or short-term problems. However, the risk of developing mild high blood pressure, fluid retention, and proteinuria is slightly higher if you have one kidney instead of two.

The oxygen atoms undergo reduction, formally gaining electrons, while the carbon atoms undergo oxidation, losing electrons. Thus oxygen is the oxidizing agent and carbon is the reducing agent in this reaction.

Answer:

reactants

Explanation

This is because a reactant is a substance that participates in chemical reactions and the result of this would create the product. So essentially the reactant is ENTERING into the chemical reaction.

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1. Observation 2. Inference 3. Inference 4. Observation 5. Inference.

Observing is capturing a property or a change by using the senses with or without the aid of an instrument. It does not involve judgement or reasoning.

1. The fish’s ventral fin measured 8.5 cm long.

Observation:- The size of the fish's ventral find is measured with an instrument; reasoning is not involved. The population of protozoans in the lake has increased since there is an increased level of carbon dioxide in the water.

Inference:-It is an inference because the population is measured but the reason why it increased is a conclusion or hypothesis product of analysis (reasoning). It is based on evidence, but not the evidence per se.

Inference:-The grizzly bear’s tracks were 5.5 cm deep in the mud; therefore, it weighs 410 kg:

Observation:-Many fish bones were found around the eagles’ nest; therefore, the eagles were eating fish.

Inference :- This is an inference, because it is a conclusion or hypothesis. Many fish bones were observed around the eagles'nest, but the eagles were not seen eating fish, but the observer thought (concluded) that the evidence of the fish bones supported the conclusion that the eagles were eating fish.

Disclaimer: your question is incomplete, please see below for complete ques9tion

are observations or inferences from observations.

The fish's ventral fin measured 8.5 cm long.

The grizzly bear's tracks were 5,5 cm deep in the

mud; therefore, it weighs 410 kg.

inference is

observation pne in the atmosphere increased to

34 parts per billion after the thunderstorm,

The population of protozoans in the lake has

increased since there is an increased level of

carbon dioxide in the water.

Many fish bones were found around the eagles'

nest; therefore, the eagles were eating fish,

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Explanation:

are. o. I, ,oo , I,I, o...,. r b Mom o,

ok .

Answer:

2/4 A and 2/4 O

Explanation:

Infections can be treated or prevented in many different parts of the body with the help of sulfasalazine. It is a member of the sulfonamide antibiotics class of drugs. By limiting the development of bacteria, it functions.

An antibacterial sulfonamide with a dimethyl-isoxazole substituent is sulfasalazine (INN, also known as sulfasalazine). It has antibiotic properties that can kill both Gram-positive and Gram-negative organisms. It is occasionally administered along with erythromycin or phenazopyridine (see erythromycin/Sulfafurazole). Locally, it is applied as an ointment or 4% solution. Sulfisoxazole is an oxazole-substituted sulfonamide antibacterial. It is antibiotic against a variety of gram-positive and gram-negative organisms. It functions as a drug allergen as well as an antibacterial. It is an isoxazole and a sulfonamide.

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Answer: I hope this is the right answer you were looking for, if not I'm sorry

Explanation:

The first organic molecules formed about 4 billion years ago. This may have happened when lightning sparked chemical reactions in Earth's early atmosphere. RNA may have been the first organic molecule to form as well as the basis of early life.

The sense of smell in tigers is highly developed and serves as a critical tool for survival. It helps them locate prey, establish territories, detect potential threats, and identify reproductive opportunities. The acute sense of smell in tigers enhances their hunting efficiency and contributes to their overall adaptation as top predators in their habitats

The sense of smell in tigers is particularly strong and plays a crucial role in their survival. Tigers have a highly developed olfactory system, equipped with specialized receptors in their nasal cavity that allow them to detect and discriminate various odors in their environment.

The sense of smell is essential for tigers when it comes to finding food. Tigers are carnivores and rely on hunting to sustain themselves. Their acute sense of smell helps them locate potential prey, even from a distance. Tigers can detect the scent of other animals, such as deer or wild boar, which enables them to track and stalk their prey effectively.

The olfactory system of tigers allows them to detect not only the presence of potential prey but also to gather information about the prey's location, health, and even reproductive status. They can identify the scent markings left by other tigers, which help them establish and defend their territories. Additionally, tigers can use their sense of smell to detect the presence of rival tigers or potential threats in their surroundings.

The ability to smell plays a vital role in a tiger's hunting strategy. Tigers often rely on ambushing their prey, and a keen sense of smell allows them to analyze the scent trails left by potential prey, determining their direction and estimating the distance to their target. This helps tigers plan their approach and execute precise and efficient hunting strategies, increasing their chances of a successful kill.

Moreover, a tiger's sense of smell is not only limited to locating prey but also plays a role in identifying potential mates. During the breeding season, female tigers release pheromones that indicate their receptiveness to mating. Male tigers can detect these scents and use them to locate and court females.

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The Lewis dot structures represent the valence electrons of the elements, which are the electrons in the outermost shell. The dots are placed around the element's symbol, with each dot representing one valence electron.

Here are the number of valence electrons and the corresponding Lewis dot structures for each element:

Calcium:

Group #: 2

of valence e-: 2

Lewis dot structure: Ca with 2 dots around it.

Carbon:

Group #: 14

of valence e-: 4

Lewis dot structure: C with 4 dots around it.

Fluorine:

Group #: 17

of valence e-: 7

Lewis dot structure: F with 7 dots around it.

Oxygen:

Group #: 16

of valence e-: 6

Lewis dot structure: O with 6 dots around it.

Neon:

Group #: 18

of valence e-: 8

Lewis dot structure: Ne with 8 dots around it.

Hydrogen:

Group #: 1

of valence e-: 1

Lewis dot structure: H with 1 dot around it.

Aluminum:

Group #: 13

of valence e-: 3

Lewis dot structure: Al with 3 dots around it.

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Populations in an ecosystem can be affected by a variety of things, including habitat change, resource availability, predation, competition, disease, or human activities.

If a change occurs that adversely affects the ability to tolerate or reproduce, the amount of green leaf population may decrease. For example, if habitat is lost due to deforestation, populations of green leafhoppers may lose their preferred food supplies or nesting sites, leading to a decline in population numbers. Similarly, if predation pressure increases, a population may experience increased mortality and poor reproductive success, resulting in a decline in numbers.

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In a low-pressure system, the temperature changes.

Pressure in the environment is the force exerted on a surface by the air above it as gravity pulls it to the Earth. In scientific terms, pressure can be defined as the force exerted on a surface per unit area. The atmospheric pressure is also known by the name barometric pressure.

Temperature is the measure of the hotness of coldness of the environment. The units used to measure the temperature are Celsius, Kelvin and Fahrenheit. Temperature and pressure are directly proportional and hence in low pressure system, the temperature will also be low.

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