where in the vertebral column is a lumbar puncture generally done

The population after 40 years will be 400,000 animals, and the population after 65 years will be approximately 336,000 animals.

To determine the population after a certain time period, we can use the formula for exponential decay;

N(t) = N0 × $(1/2{)}^{(t/T)}$

Where;

N(t) is the population at time t

N0 is the initial population

t is the time elapsed

T is the half-life of the population

Given;

N0 = 1.6 million

T = 20 years

Let's calculate the population after 40 years;

N(40) = 1.6 million × $1/2^{(65/20)}$

= 1.6 million × (1/2)²

= 1.6 million × (1/4)

= 400,000

Therefore, the population after 40 years will be 400,000 animals.

Now, let's calculate the population after 65 years;

N(65) = 1.6 million × $(1/2{)}^{(65/20)}$

= 1.6 million × $(1/2{)}^{(13/4)}$

≈ 1.6 million × 0.210

≈ 336,000

Therefore, the population after 65 years will be approximately 336,000 animals.

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Answer:

1. phytoplankton and other organisms harness sunlight , to create photosynthesis , near hydrothermal vent there is no sunlight

2. Phytoplankton need nutrients to grow, so when there's none at the surface they can't thrive, and there's no surface in hydrothermal vent

3.  The ocean's increasing acidity will most likely kill them.

Hope that helps

Explanation:

Algae called phytoplankton need sunshine to perform photosynthesis.Additionally, they need particular minerals like nitrates, phosphates, and silicates, which come from the upwelling of nutrient-rich deep waters.The varying of the seasons has an impact on both of these variables.

Why are phytoplankton cells found close to the ocean's surface?

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Answer:

D

Explanation:

Hope this helps!

Answer:

circulatory system

Explanation:

Where do you think the nutrients from the food that you eat go after digestion? The entire point of eating is to get energy and nutrients tot he other parts of the body and to do that you need the circulatory system.

The viral structure responsible for recognizing specific host cells isa glycoproteingenetic material is retrovirus.

What is virus ?

A segment of nucleic acid (DNA or RNA) encased in a protein coat, either DNA or RNA, makes up a virus, an infectious bacterium. Viruses are unable to multiply on their own; instead, they must infect cells in order to utilise the components of the host cell to make copies of themselves.

What is retrovirus ?

A specific class of virus whose genetic makeup is composed of RNA rather than DNA. It integrates into the DNA of the host cells using the reverse transcriptase enzyme. The virus can multiply many times in the host cells as a result.

Therefore, The viral structure responsible for recognizing specific host cells isa glycoproteingenetic material is retrovirus.

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Answer:

jigsaw puzzle

Explanation:

A substrate can only bind itself to an enzyme should it be the right fit. When a substrate and enzyme merge, they are completed resembling that of a jigsaw puzzle.

Answer:

c. lock & key

Explanation:

took the quiz

An unusually high number of individuals with retinitis pigmentosa disease initially colonized the islands explains how the occurrence of a rare, genetic disorder can be so much more prevalent on a small group of islands. The correct option is A.

Thus, the islands were initially colonized by an abnormally large number of people who had the disease, and there has been very little immigration since then. A higher prevalence of retinitis pigmentosa would have resulted from rare genetic disorders becoming more common over time due to the island people's seclusion from the rest of the world and limited starting population size.

Thus, the ideal selection is option A.

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Answer:

In explanation.

Explanation:

Effect of osmosis on cells:

-Osmosis is the movement of water across a cell membrane. Cells use osmosis to maintain concentration equilibrium (the concentrations of solute inside and outside the cell are equal). Changing the amount of water allows the cells to achieve equilibrium.

Effects of osmosis on tissues:

-Red blood cells placed in a solution with a higher water concentration compared to their contents (eg pure water) will gain water by osmosis, swell up, and burst. Water will diffuse from a higher water concentration outside the cell to a lower water concentration inside the cell.

Hope this helps.

If sds-page were used for a pure sample of this protein that was preincubated with mercaptoethanol, then there would be two bands expected.

The sds-page stands for the sodium dodecyl sulfate polyacrylamide gel electrophoresis that is a discontinuous electrophoretic system. It is used to obtain the high resolution separation of the complex mixtures of the proteins.

The sds-page allows the protein separation on the basis of their mass, and their medium is known as matrix which is consists of polyacrylamide based discontinuous gel. In this method the charged molecules migrated to the electrode with the opposite sign when placed in electric field.

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Blocking ribosomes prevents protein assembly. The correct answer to the question is option d) protein assembly.

Blocking ribosomes can prevent protein assembly, which is the process of assembling amino acids to form proteins. Ribosomes are the primary site of protein synthesis in a cell, and they play a crucial role in the formation of peptide bonds between amino acids. By blocking ribosomes, the formation of peptide bonds is impeded, which can lead to the inhibition of protein assembly.

This can occur due to several factors such as the presence of an antibiotic that prevents the functioning of ribosomes, or the genetic modification of the ribosome, which changes the way it interacts with amino acids. Blocking ribosomes can have significant consequences on the cell's ability to carry out its normal functions, as proteins are essential for the proper functioning of all living organisms.

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Answer: The correct answer is C) It is Earth's least biodiverse biome.

Explanation:

The tundra biome is Earth's least biodiverse biome, characterized by cold temperatures, low precipitation, and a short growing season. It has a harsh environment with frozen soil and limited vegetation, resulting in low species diversity.

Answer:

I

Explanation:

In English language, a subject can be defined as the person, thing, idea or place that performs an action.

On the other hand, an object refers to the person, thing, idea or place that receives an action performed by the subject.

Also, a direct object is the specific thing a subject acts upon and as such it answers the question of what, whom or who.

A pronoun is one of the parts of speech and it can be defined as a word that replaces a noun in a sentence. Some examples of a pronoun are he, she, you, I, who, it, them, ours, etc.

Therefore, Rishi and I have always shared an intimate relationship over the years. ​Rishi is the subject while I is the object pronoun.

Answer:

Twenty-two amino acids are naturally incorporated into polypeptides and are called proteinogenic or natural amino acids. Of these, 20 are encoded by the universal genetic code. The remaining two, selenocysteine and pyrrolysine, are incorporated into proteins by unique synthetic mechanisms.

Explanation:

Sweating, vasodilation, and flat body hairs are all mechanisms used by the body to regulate its temperature in hot conditions. Sweating helps to cool the body through evaporation, vasodilation increases blood flow to the skin to dissipate heat, and flat body hairs reduce insulation, all working together to help maintain a stable body temperature.

Sweating is the process by which the body releases excess heat through the evaporation of water from the skin. When the body temperature rises, sweat glands are activated and begin to produce sweat, which is then transported to the surface of the skin. As the sweat evaporates, it cools the skin and reduces the body temperature. Vasodilation is the widening of blood vessels, which increases blood flow to the skin and allows heat to be released from the body. In hot conditions, the body increases blood flow to the skin through vasodilation, which helps to transfer heat from the body to the environment. Flat body hairs also help to regulate temperature in hot conditions by increasing the surface area of the skin and enhancing heat loss. When the body is hot, the tiny muscles that control the position of the body hairs relax, causing the hairs to lie flat against the skin. This increases the surface area of the skin and allows heat to be released more efficiently.
1. Sweating: When your body is exposed to hot conditions, your sweat glands produce sweat. As the sweat evaporates from the skin's surface, it helps to cool the body down by dissipating the heat.
2. Vasodilation: In response to high temperatures, the blood vessels near the skin's surface (mainly arterioles) dilate or widen. This process, called vasodilation, increases blood flow to the skin, allowing more heat to be transferred from the core of the body to the skin's surface, where it can be released into the environment.
3. Flat body hairs: When it's hot, the tiny muscles at the base of your body hairs relax, causing the hairs to lie flat against your skin. This reduces insulation and allows heat to escape from the body more easily, helping to cool you down.  In summary, during hot conditions, sweating helps to cool the body through evaporation, vasodilation increases blood flow to the skin to dissipate heat, and flat body hairs reduce insulation, all working together to help maintain a stable body temperature.

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Answer:

The correct answer is - distal convoluted tubule.

Explanation:

Proximal convoluted has the maximum amount of reabsorption and the least amount of salt reabsorption. There will be the maximum amount of salt inside the proximal convoluted tubule as it absorbs most of the salt concentration. Whereas distal proximal tubules have more salt concentration in the surrounding area as they are not able to absorb salt in comparison to the other parts of the nephron.

The correct answer is - distal convoluted tubule.

Answer:

D brainliest please

Explanation:

Answer:

D

grass, antelope ,lion

The example of the mix-n-match game with the kingdoms of life is given below.

A game mixing and matching kingdoms of life: match organisms from various kingdoms.

Rules: given list of organisms. Match organisms with kingdoms using biology knowledge. Once matched, submit answers for feedback. Let's begin with the organisms:

A. Human

B. Oak tree

C. Mushroom

D. Paramecium

Below are the kingdoms of life:

Therefore, Match all of the organism to its corresponding kingdom. An Example: Human - Animalia.

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Answer:

They accumulate in the bilge, the lowest part of the boat. Both gasoline and propane fumes are heavier than air. For that reason it's very important that the bilge of a boat has sufficient ventilation.

Answer:

thats only 5.

Explanation:

Answer:

They are exclusively marine animals, the organisms are spiny-skinned, and they are triploblastic and have a coelomic cavity.

Explanation:

Answer:

Explanation: In the SIR model , the time to recover depends on several factors ,s

uch as the characteristics of the disease, effectiveness of treatment and the individual's immune response. The variable y is not typically used in SIR , so it is unclear how it relates to the time recover .

 In SIR model, the recovery rate is reperesented by " 1/ gamma" Where gamma is a recovery rate . The recovery rate is the inverse of the average duration of the infectious period. So, if the infectious period is 5 , then the recovery rate would be 1/5 or 0.2.

The statement which is not necessary for being able to determine the age using radiometric dating is the half-life of the daughter isotope. Thus, the correct option for this question is A.

Radiometric dating may be defined as a type of methodology that significantly calculates the age of geological material like rocks in years by measuring the presence of a short-life radioactive element.

The age of rocks is determined by radiometric dating, which looks at the proportion of two different isotopes in a sample. Radioactive isotopes break down in a predictable amount of time, enabling geologists to determine the age of a sample using equipment like this thermal ionization mass spectrometer.

Therefore, the statement which is not necessary for being able to determine the age using radiometric dating is the half-life of the daughter isotope. Thus, the correct option for this question is A.

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Answer:

Melanin helps the mouse survive because of the fur color. Its color helps it to blend into its surroundings, making it a lot harder for predators to kill it, as the predators have a harder time seeing the mouse.

Explanation:

Answer:

ticks

Explanation:

Answer:

Homologous chromosomes

Explanation:

Homologous chromosomes are chromosomes which contain the same genes in the same order along their chromosomal arms.