Wrinkles and sagging skin in elderly individuals are caused by a combination of factors including natural aging, environmental factors, and lifestyle choices.
Explanation:Wrinkles and sagging skin in elderly individuals are the result of a combination of factors. One major factor is the natural aging process, which leads to a decrease in collagen and elastin proteins that provide skin elasticity. In addition, exposure to harmful environmental factors like UV radiation, smoking, and pollution can accelerate the aging process and contribute to wrinkles and sagging skin. Lastly, lifestyle factors such as poor nutrition, lack of hydration, and excessive stress can also impact skin health and contribute to the formation of wrinkles and sagging.
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why does DNA need to replicate before cells divide?
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.Learn more: https://brainly.com/question/16464230?referrer=searchResults
What layer of the epidermis represents the transition from living to dead epithelial cells?
The stratum granulosum represents the transition from living to dead epithelial cells in the epidermis.
What provides the electron transport chain in cellular respiration with the energy it needs to function?
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.
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
Answer: a constant stream of charged particles flowing away form the sun
Explanation:
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?
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
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?
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.
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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?
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.
Why is bamhi a good choice for this experiment?
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.
food chains and webs not only describe the order in which organism are eaten, but they also describe the
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.
Amino acids are transported to the ribosome for use in building the polypeptide by
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.
the cancellation of two waves occurs because of which of the following
Which would be a habitat for chemoautotrophs bur not photoautotrophs?
Homework plz help.it's due tommorow
Name one bad thing that could happen to a cell if it could not perform exocytosis
The oils found in walnuts, soybeans, flaxseed, and wheat germ represent a good source of preformed ____.​
The nurse is caring for a client who had a massive myocardial infarction and developed cardiogenic shock. which clinical manifestations support these diagnoses?
The state achieved when energy from food equals energy expended, maintaining body weight is known as
For oi, how is collagen transported across the cell membrane
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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What is a "rep" in strength training? The number of times to complete the full motion of an exercise The number of exercises completed The number of motions made in a workout The number of weights lifted during a training session
Answer:
A
Explanation:
took the test
What contents of the lysosome aids in their digestive function?
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
What factor is most likely to have caused the change in the number of bird species that occurred between years 30 and 60?\?
The head of a phospholipid interacts with water because it is
NADH and FADH2 are classified as which of the following? acids coenzymes enzymes lipids
NADH and FADH2 are classified as which of the following?
A) acids<=WRONG
B) coenzymes <=ANSWERC) enzymes <=WRONG
D) lipids<=WRONG
Answer:
Coenzymes!
Explanation:
Edge
What role do currents play in meeting the nutritional needs of the ocean's inhabitants?
The hole in the spinal cord through which csf flows is the:
If there are two species of butterfly that are able to mate but produce sterile offspring, are the offspring considered a new species?
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 offspringLearn more to evaluate
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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.
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.
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Answer:
D) Both surfaces of the membrane can interact with water and other molecules.
Explanation:
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