Twelve-year-old sam has begun to develop facial hair and acne. his twin sister stacey is developing underarm hair and acne. what hormone is responsible for these changes?

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Answer 1
The changes observed in Sam and his twin sister is known as puberty changes. The hormone that is responsible for puberty changes is LUTENIZING HORMONE.
The pituitary gland is the one responsible for releasing lutenizing hormone. In females, lutenizing hormone stimulates the oestrogen hormone to be released in female and testosterone hormone to be released in males.

Related Questions

The state achieved when energy from food equals energy expended, maintaining body weight is known as

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It is known as energy balance

What are the only fully formed organs on cnidarians?

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Digestive organs are the only fully formed organs

What provides the electron transport chain in cellular respiration with the energy it needs to function?

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The electron transport chain is powered by energy from high-energy electrons carried by NADH and FADH₂ from earlier stages of cellular respiration. These electrons are used to create a proton gradient which, when released through ATP synthase, synthesizes ATP.

The electron transport chain in cellular respiration is provided with the energy it needs to function primarily by NADH and FADH₂. These molecules carry high-energy electrons which are the result of earlier stages of respiration, like glycolysis and the Krebs Cycle. As these high-energy electrons are transported through the chain, a portion of their energy is used to pump protons (H+) into the intermembrane space of the mitochondria, which creates a substantial proton gradient.

When these protons flow back into the mitochondrial matrix through ATP synthase, their movement drives the synthesis of ATP from ADP and inorganic phosphate in a process called chemiosmosis. This process, crucial for powering various cellular functions, is an excellent demonstration of the principle that it takes energy to make energy.

The oxygen that we breathe plays an essential role in this process, as it serves as the final electron acceptor in the electron transport chain, becoming water in the process. This last stage of cellular respiration is highly efficient and succeeds in transferring the potential energy from carrier molecules to ATP, which is then available as a direct energy source for cellular activities.

Students conducted an investigation which required them to record daily the height in millimeters of several plants. Which tool would be the most accurate and appropriate for this measurement?

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The most accurate and appropriate tool would be Metric Ruler
Metric Ruler provides a measurement in the form of Metrics, and the most commonly sold in stores usually provide it with Centimeters and Millimeters.
This tool would be more efficient than let's for say a yardstick that provide measurements in yard and inches.

Homework plz help.it's due tommorow

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Look up an image of a plant cell with labels. 

Researchers condition a flatworm to contract its body to a light by repeatedly pairing the light with electric shock. the stage in which the flatworm's contraction response to light is first established and gradually strengthened is called

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This is the acquisition stage. During this stage, the learned behavior is being taught and the learner begins to link the stimulus with the response. After a time, the behavior does not need to be linked to the stimulus (the shock) for it to take place and it can automatically occur whenever the light is presented.

What role do currents play in meeting the nutritional needs of the ocean's inhabitants?

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Currents play a vital role in the nutritional needs of the ocean's inhabitants. Currents create a process called upwelling that carries organic matter from deep waters and the sea floor to the surface. The nitrogen and phosphate help to fuel blooms of algae and other plants which are eaten by creatures such as krill. Krill and other small ocean inhabitants serve to feed larger surface ocean life. Upwelling then causes downwelling which carries oxygen-rich surface water below, without which the deep sea life would not survive the toxic waters.

Which would be a habitat for chemoautotrophs bur not photoautotrophs?

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A habitat for chemoautotrophs but not photoautotrophs would be a DEEP OCEAN TRENCH.

Know the difference between light dependent and light independent reactions (what is involved in both reactions? what is produced in both reactions? where do these reactions take place? how are they different, you need to compare and contrast.

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Can you list the answers please?

the cancellation of two waves occurs because of which of the following

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The cancellation of two waves occurs because of destructive interference
I'm going to go with destructive interference. 

Name one bad thing that could happen to a cell if it could not perform exocytosis

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The cell membrane would most likely break down and the cell would die. Without exocytosis a cell membrane cannot receive nutrients and protein essential to the strength of the membrane. The cell would not be able to excrete material into the extracellular environment which would be devastating.

The head of a phospholipid interacts with water because it is

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Hydrophilic

A phospholipid is comprised of a phosphate hydrophilic head, which means that it is "water-loving," and a fatty acid hydrophobic tail, which is "water-hating." The head and the tail are joined together by a glycerol molecule. 

The phosphate head is attracted to water because it is charged (i.e. negatively). Water is a polar molecule, which means that there is an uneven distribution of charges within its molecular structure with the oxygen side being "more negative" than the rest of the atom (which is "more positive" near the hydrogen). Thus, the negatively-charged nature of the phosphate head and the parts of the water molecule which are positively charged enable the two to form an "attraction" towards one another. 

On the other hand, the hydrophobic tail is nonpolar, which means that it does not have a "more positive" or "more negative" side or part in its molecular structure. These differences in structure with water make the hydrophobic tail unattracted to water molecules and more attracted to other uncharged, nonpolar molecules (such as fats and oils).  

food chains and webs not only describe the order in which organism are eaten, but they also describe the

Answers

flow of energy in an ecosystem 

Answer:

Trophic levels and energy flow on food chains

Explanation:

The trophic level in a food chain (or web) corresponds to the position of each living being in relation to its energy and nutrient flow in relation to the others.

There are three types of basic trophic levels:

Producers - Plants and other photosynthetic and chemosynthetic organisms

Consumers (food chains usually have more than one) - Herbivores, Carnivores and Omnivores

Decomposers - Bacteria and Fungi

An example food chain according to trophic levels:

Phytoplankton(producer) → Krill (1st consumer) → Penguin (2nd consumer) → Seal (3rd consumer) → fungi and bacteria (decomposers)

Also, it is important to highlight that at each trophic level, less energy is absorbed when a living being consumes the previous one, so the more trophic levels a chain has, the lower the energy flow at the end.

What is solar wind? a constant stream of charged particles flowing away from the sun a stream of wind coming from the sun wind that constantly circles the surface of the sun a shield that prevents radiation from reaching the Earth’s surface

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a constant stream of charged particles flowing away form the sun

Answer: a constant stream of charged particles flowing away form the sun

Explanation:

Why is bamhi a good choice for this experiment?

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BamHI is a type II restriction endonuclease, ensuring the dimensions for recognizing short arrangements of DNA and cutting them at a target site. It transmits various type II endonuclease, replicating DNA, and possibly handling DNA mutation-derived infections through genetic therapy. 

What contents of the lysosome aids in their digestive function?

Answers

Digestive enzymes are prolific inside the lysosomes. The organelle is named as such because these enzymes engage in "lysing" activity, meaning that the break up the worn-out cell parts or other wastes that the structure engulfs.

What layer of the epidermis represents the transition from living to dead epithelial cells?

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The answer to this question would be: Stratum granulosum

In stratum granulosum, the cell is producing keratin and became gradually flattened. The keratinocyte will become a layer of keratin that used for protecting the skin. After a while, the dead cells will be replaced by the new keratin from the deeper layer and dead cells will be shed from the skin.

The stratum granulosum represents the transition from living to dead epithelial cells in the epidermis.

Stratum granulosum is the layer of the epidermis where the cells transition from being alive to becoming flattened, filled with keratin, and ultimately dead, forming a protective barrier for the skin.In this layer, the keratinocytes start to lose their organelles and nuclei, beginning the process of cell death as they move towards the surface.As cells move from the stratum basale to the stratum corneum, they undergo a process called keratinization, where they produce keratin and gradually lose their nuclei and organelles.The layer of the epidermis that represents the transition from living to dead epithelial cells is the stratum granulosum.

If there are two species of butterfly that are able to mate but produce sterile offspring, are the offspring considered a new species?

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No. The offspring is not considered a new species. By definition, a species are organisms that are capable of exchanging genes and can successfully breed together. Since the offspring is sterile and cannot interbreed, it is not considered a new species. 

No, a sterile specie cannot be a new specie.

Further explanation

Specie

It can be defined as a group such individuals which can mate and produce new offspring.

Evolution

It can be defined as heritable attributes of natural populations which transfer in next generations over a period of time. These qualities are the statements of qualities that are passed on from parent to descendants. Various qualities will in general exist inside some random population because of transformation, hereditary recombination and mutations. Different factors influence on evolution as gene flow, mutation, natural selection and genetic drift.

Role of mutation in evolution

It can be defined as change that happens in sequence of DNA and this is a permanent change. Different consequence of natural factors, for example, UV light, tobacco and smoke are responsible for mutation. Mutation is major cause of evolution. It can be good and bad.

Natural selection

Evolution can also be caused by natural selection. Creatures that are progressively adjusted to their condition are bound to endure and pass on the qualities that supported their prosperity. This procedure makes species change and wander after some time. Natural selection is one of the approaches to represent a huge number of animal groups that have lived on Earth. Charles Darwin (1809-1882) and Alfred Russel Wallace (1823-1913) are mutually acknowledged for the hypothesis of advancement by regular choice, having co-distributed on it in 1858.

Sterile offspring

Such offspring which can not reproduce are called sterile offspring. That’s why we cannot say that they are new species. Sterile offspring produce as a result of mutation or genetic error.

Answer details

Subject: Biology

Level: High school

Key words

Species Evolution Role of mutation in evolution Natural selection Sterile offspring

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The hole in the spinal cord through which csf flows is the:

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the answer is central canal and it basically is in the center of the spinal cord in which csf flows from the brain to the lower end. 

Which sentence represents a hypothesis? environmental conditions affect the pollination of plants. boil 100 milliliters of water, let it cool, and then add 10 seeds to the water. is water depth in a lake related to available light in the water? a lamp, two beakers, and elodea plants are selected for the investigation?

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The best answer for this question would be:

 

environmental conditions affect the pollination of plants.

 

Because it depicts the starting information or theory that the researcher is stating. His theory is that the conditions of the plant will affect the plant, and therefore experiments on the procedure to prove his theory. 

Answer and Explanation:

environmental conditions affect the pollination of plants.

Because it depicts the starting information or theory that the researcher is stating. His theory is that the conditions of the plant will affect the plant, and therefore experiments on the procedure to prove his theory.

Hope this helps :)          

Amino acids are transported to the ribosome for use in building the polypeptide by

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tRNA molecules

Hope i helped!

Semipermeable cell membranes are made of phospholipids that form a bilayer. What major benefit does this arrangement of the membrane provide to the cell?

a. The cell is able to easily change shape and size
b. Both surfaces of the membrane are nonpermeable
c. The cell has a greater level of structural support
d. Both surfaces of the membrane can interact with water and other molecules.

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Answer:

The correct answer is D) Both surfaces of the membrane can interact with water and other molecules.                                                                                                                                                                

Explanation:

Phospholipids provide barriers in cellular membranes to protect the cell, and they make barriers for the organelles within those cells.

Phospholipids work to provide pathways for various substances across membranes. Membrane proteins stud the phospholipid bilayer; these respond to cell signals or act as enzymes or transporting mechanisms for the cell membrane.

The phospholipid bilayer readily allows essential molecules such as water, oxygen and carbon dioxide to cross the membrane, but very large molecules cannot enter the cell in this way or may not be able to at all.

Cheers!

 

Answer:

D) Both surfaces of the membrane can interact with water and other molecules.                                                                                                                                    

Explanation:

I took the test and got a good grade

What factor is most likely to have caused the change in the number of bird species that occurred between years 30 and 60?\?

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Many factors such as increase in predators, lower supply of food, or increase of diseases.

The nurse is caring for a client who had a massive myocardial infarction and developed cardiogenic shock. which clinical manifestations support these diagnoses?

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The clinical manifestation that support these diagnose is both rapid pulse and decreased urine output. Rapid pulse and decreased urine output will be the best clinical manifestations that support these diagnose. When the client or the patient had a massive myocardial infarction and developed cardiogenic shock, the best clinical manifestation is rapid pulse and decreased urine output.

For oi, how is collagen transported across the cell membrane

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through the cytoplasm

Collagen is transported across a cell membrane via vesicular transport.

What is collagen?

Extracellular proteins are those that carry out their functions in the cell's surrounding matrix outside of the cell.

Since they are created inside the cell yet secreted outside to perform their function, they are known as secretory proteins. They play a part in cell communication, immunology, and homeostasis.

The strength and structural integrity of tissues are largely due to collagen. The most prevalent protein in the body is collagen.

Therefore, Collagen is transported across a cell membrane via vesicular transport.

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The oils found in walnuts, soybeans, flaxseed, and wheat germ represent a good source of preformed ____.​

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The answer is Linolenic Acid. Oils found in walnuts, soybean or even in flaxseed are a good source of performed linolenic acid. Linolenic Acid is considered to be a fatty acid. A good source of Linolenic acid is vegetable oil.

Organisms can be ______________, where they are composed of only 1 cell, or they can be __________ where they are composed of many cells. Question 1 options: Multicellular, unicellular Monocellular, polycellular Unicellular, multicellular

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1. unicellular
2. multicellular
Organisms can be UNICELLULAR where they are composed of only 1 cell or they can be MULTICELLULAR where they are composed of many cells. The first organisms to appear on earth where single celled and they developed the ability to photosynthesize and make food from inorganic compounds. UNICELLULAR organisms such as bacteria predates complex organisms that are Multi cellular

why does DNA need to replicate before cells divide?

Answers

DNA needs to replicate before cells divide to give the complete set of genetic instructions to its daughter cells, (or ensures that each new cell inherits all of the genetic traits of the parent cell). 

Hope this helps! :D

~PutarPotato 

DNA needs to replicate before cells divide so that each daughter cell will have the same and equal number of chromosomes.

DNA REPLICATION:

DNA replication is the process whereby living organisms copy their genetic material (DNA) to produce two identical DNA molecules.

Prior to DNA replication, the double-stranded DNA separates into two single strands. Each strand then serves as a template for two new complementary strands added by DNA polymerase.

At the end of replication, each DNA molecule will consist of one new stand and one old strand.

DNA replication is paramount for every cell before undergoing division because the daughter cells of an organism produced must contain the same type and amount of genetic material as their parent.

Note that, DNA replication takes place in the synthesis (S) phase of mitosis/meiosis.

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List the four (4) major groups for the antidepressant medications and the prototype of each one. what are the major differences between the four (4) classes?

Answers

The 4 major groups of Antidepressants are:

1.       Selective serotonin reuptake inhibitors may comfort depression by aggregating intensities of serotonin in the brain.  Examples of this are: Citalopram, Escitalopram, Paroxetine, Fluoxetine, Fluvoxamine, and Sertraline.

2.       Atypical Antidepressants aims other neurotransmitters either alone or in accumulation to serotonin. Examples of this are: Bupropion, Mirtazapine, and Trazodone.

3.       Tricyclic Antidepressants upsurge levels of norepinephrine and serotonin. Examples of this are: Amitriptyline, Amoxapine, Desipramine, Doxepin, Imipramine, Nortriptyline, Protriptyline, and Trimipramine.

4.       Monoamine oxidase inhibitor eliminates the neurotransmitters from the brain. Examples of this are: Rasagiline, Selegiline, Isocarboxazid, Phenelzine, and Tranylcypromine.

NADH and FADH2 are classified as which of the following? acids coenzymes enzymes lipids

Answers

NADH and FADH2 are classified as which of the following?

A) acids<=WRONG

B) coenzymes <=ANSWER

C) enzymes <=WRONG

D) lipids<=WRONG

Answer:

Coenzymes!

Explanation:

Edge

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