Answer:
The answer is B. Hayflick limit, 50.
Explanation:
The Hayflick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only replicate and divide forty to sixty times before it cannot divide anymore, and will break down by programmed cell death or apoptosis.
Leonard Hayflick developed the concept while at the Wistar Institute in Philadelphia, Pennsylvania, in 1965. In his 1974 book Intrinsic Mutagenesis, Frank Macfarlane Burnet named the concept after Hayflick. The concept of the Hayflick Limit helped scientists study the effects of cellular aging on human populations from embryonic development to death, including the discovery of the effects of shortening repetitive sequences of DNA, called telomeres, on the ends of chromosomes.
__________Are the subunits making up nucleic acids
Answer:
Nucleotides.
Explanation:
Nucleic acids (DNA, RNA) are large polymers, made out of monomer building blocks called nucleotides. The nucleotides have a similar structure with three 'subunits': A phosphate group
What are sustainable use practices?
(a) any materials that exist in nature and that are used by humans
(b) the managed consumption of natural resources to prevent their depletion or environmental destruction
(c) the deployment of fossil fuels to environments that previously did not have access to such resources
(d) ways in which individuals are able to conserve native animal and plant species
Answer:
The answer is B,
Explanation:
B. The managed consumption of natural resources to prevent their depletion or environmental destruction
Sustainable practices are managing natural resource consumption to prevent depletion or environmental destruction. Therefore, option "B" is correct.
what are sustainable practices?Manageable practices support biological, human, and monetary well-being and imperativeness. Supportability assumes that assets are limited, and ought to be utilized moderately and shrewdly so as to long haul needs and outcomes of the manners by which assets are used.
Organizations and individuals that consideration about supportability are likewise less inclined to infringe upon the regular living spaces of wild creatures, consequently safeguarding the biodiversity of our planet.
Therefore, sustainable practices help the planet breathe and are also beneficial for human beings.
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HELP PLEASE FAST ASAP PLEASE HELP
Answer:
D. Their ability to replicate very fast and natural mutations combine to allow them to evolve rapidly
Explanation:
They develop mutations in their DNA that can be resistant to the drugs given.
What do you mean by taxonomy?
Answer:
The answer is below
Explanation:
Definition:
Taxonomy - The science of addressing, describing and classifying organisms (plants, animals and microorganisms of the world).
What is a Bivalents in biology
Answer:
A pair of homologous chromosomes is called Bivalents
Answer:
two homologous chromosomes that have joined in synapsis at Prophase I of Meiosis I.
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--Applepi101
Which of the following would scientists use as the best indicator of the health of a water system
1 . Temperature & turbidity
2. Water currents & turbidity
3. Convolution & turbidity
4. Submersion and turbidity
Answer:
Explanation: 2
The best indicator of the health of a water system is Temperature & turbidity. That is option 1.
Monitoring of Water qualityThe Water quality can be monitored in various ways which involves the sampling and analysis of water constituents and conditions.
The importance of monitoring water quality is investigate:
Introduced pollutants, such as pesticides, metals, and oils, andConstituents found naturally in water that can nevertheless be affected by human sources, such as dissolved oxygen, bacteria, and nutrients.To show that water source is healthy, the following indicators are put into consideration:
temperature,turbidity, total alkalinity, and fecal bacteria.Turbidity is measured using turbidity sensor and temperature is measured using thermometer.
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Which of the following is true of mitosis? Select one: a. Mitosis is the cellular reproduction that occurs to form the sperm and the egg cells. b. Mitosis results in the formation of four new cells. c. Mitosis results in the formation of two new cells with 23 pairs of chromosomes. d. Mitosis results in the formation of three new cells.
Answer:
c. Mitosis results in the formation of two new cells with 23 pairs of chromosomes.
Explanation:
A and B are meiosis and D is wrong
The true statement about mitosis is that "Mitosis results in the formation of two new cells with 23 pairs of chromosomes"
WHAT IS MITOSIS:
Mitosis is the process of cellular division which produces two new daughter cells that each possess the same number of chromosomes as the parent cell. Mitosis is employed for growth and cellular repair in living organisms. In humans, mitosis results in two cells that possess 23 pairs of chromosomes each i.e. 46 chromosomes in each cell. Mitosis is opposed to meiosis in the sense that the latter produces four daughter cells with a reduced number of chromosomes.Therefore, the true statement about mitosis is that "Mitosis results in the formation of two new cells with 23 pairs of chromosomes".
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Replication of eukaryotic DNA a. must be controlled to coordinate with the cell cycle b. takes place twice during each cell cycle c. must occur faster than replication of prokaryotic DNA d. takes place during mitosis
C. must be controlled to coordinate with the cell cycle
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Which activity takes place because of the contra
O fertilization
O cell differentiation
Which activity takes place because of the controlled timing of gene expression
Answer:
The that takes place because of the controlled timing of gene expression is cell differentiation. It is the process by which a less specialized cell becomes a more specialized cell type
hence ans is differentiation
Reasons for irritability
Answer:
Depression
Low blood sugar
PMS
Life stress
Anxiety
Hormonal imbalance
Lack of sleep
Explanation:
all the causes of irritability
Which of the following are functions of the reproductive organs in animals?
I. Produce sperm
II. Support the body
III. Protect the internal organs
IV. Make the eggs
I and II
II and IV
II and III
Answer: None of the above
(I and iv)
Explanation:
1.The reproductive system enables animals to create offspring.
2.Invertebrate animals exhibit a wide range of reproductive behavior, but the bottom line is that at some point during the process, females create eggs and males fertilize the eggs, either internally or externally.
Answer:
II and IV
Explanation:
Describe the similarities and differences between the cheek cell wet mount and dental plaque wet mount.
Answer:
Cells from the cheek are a type of epithelial cell, similar to skin. ... They can be seen faintly even at 40x (scanning power), but the most dramatic images are at 400x where the nucleus is clearly visible as a dark spot in the center of the cell.
Explanation:
9. Starch molecules are hydrolyzed into smaller units
known as
(1) glycerols
(2) amino acids
(3) simple sugars (4) proteins
Answer:
3
Explanation:
the smallest unit of a starch molecule is a simple sugar.
I hope this helps
Starch is a polymeric molecule which hydrolyze into smaller units which are simple sugars. Starch is a homo-polysaccharide. Thus, the correct option is 3.
What is Starch?
Starch (amylum) is a polymeric carbohydrate which consists of numerous units of glucose which are joined by glycosidic bonds. This polysaccharide is formed by the most green plants for the storage of energy in the mesophyll and bundle sheath cells of leaves.
Starch is a white, granular, organic compound which is produced by all the green plants. Starch is a soft, white, tasteless powder which is insoluble in cold water, alcohol, or other organic and inorganic solvents. The basic chemical formula of the starch molecule is (C₆H₁₀O₅)ₙ.
Therefore, the correct option is 3.
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Hereditary fructose intolerance is a genetic condition caused by a variant in the ALDOB gene, which is critical for fructose metabolism. Infants with this condition do not initially display symptoms, but as they are transitioned from breast milk or formula to solid foods, in particular fruit-based foods, they begin to display symptoms, which include vomiting, diarrhea, and low blood sugar. Individuals who do not consume fructose do not display these symptoms. Which of the following describes this condition?
a. It is incompletely penetrant, due to environmental factors.
b. It has variable expressivity, due to environmental factors.incorrect
c. It is incompletely penetrant, due to genetic factors.
d. It has variable expressivity, due to genetic factors.
It has variable expressivity due to the environmental factors.
The variation in expressivity occurs due to the environmental factors of that individual. Expressivity describes the differences observed in the phenotype between two individuals that belongs to same genotype.
In the condition, when the patient is allowed to consume the fructose based food, so it expresses the change in its body due to no tolerance against fructose so we can conclude that the change occurs due to environment not due to genetics.
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explain why germinating seeds were used in this investigation cellualr respiration
Explanation:
As oxygen is consumed to provide energy, germinating seeds release carbon dioxide. ... HYPOTHESES: The experimental hypothesis is that germinating seeds will show a greater rate of respiration than control glass beads. Additionally, that at higher temperatures, the rate of cellular respiration in the seeds will increase.
how to solve this ÷±≈∨∉㏒㏑∡
Answer:
what's that
I'm clueless
Question 1 of 10
The picture below represents a nitrogen atom.
6
How many protons does this atom have?
Answer: 7
Answer:
where is the picture. I could understand your question
identify the following organism and state to which phylum it belongs
Answer:
it belongs to Coelenterata phylum.
Two species of hummingbird want the same flowers. This is an example of what kind of ecological pressure?
Answer:
COMPETITION MAYBE
I HOPE IT'S RIGHT IF NOT THEN SORRY HAVE A GREAT DAY :)what is the strongest vasoconstrictors secreted by kidney?
Answer:
Explanation:
Endothelin is one of the most potent renal vasoconstrictors. Endothelin plays an essential role in the regulation of renal blood flow, glomerular filtration, sodium and water transport, and acid-base balance
White Leaf Disease is a devastating disease that
affects sugar cane crops in Thailand and has become a
major issue for farmers. The disease starts with a white
line forming in the center of the sugar cane's leaves,
which can change in size and shape as it develops.The sugar cane's new leaves will become increasingly whiter, often having stunted growth, and resulting in the sugar cane being less productive than the non-
infected plants, Scientists are trying to determine
what organelle must be damaged to produce the
observed results,
White leaf disease is caused by phytoplasma. The disease infects the leaves and create white spots in them.
The farmers in Thailand are facing this issue with sugarcane crops. The organisms infect phloem tissues in sugar cane and cause the leaves to turn white.
The size and shape can change as sometimes there are fine white lines created while sometime there are white spots.
Scientists are trying to deal with such disease and an spray of liquid copper has been found beneficial to treat this disease. The white spot fungus stops to spread with the spray.
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Please read the article Why Cats Have Nine Lives by Jared Diamond. Our analysis did not attempt to
answer the question of "Why" cats survive they way they do from different heights. What are some of
the assumptions the author makes that he uses in an attempt to answer this new question?
The author assumes that the question can be answered by applying principles of anatomy, physics and evolutionary biology. First reason he suggests is that cats are small and they have a favourable mass-surface area ratio. Next, he suggests that cats have soft tissues that absorb the shock and they land on all four limbs, dividing the shock. This is because of their body shape and its centre of gravity. He says that felines have this kind of body structure (that canines lack) because years of falling from trees etc. has evolved their body in this way.
The following assumptions that stem from the Straightforward theory were used by the author to explain why cats have nine lives. They include;
The larger mass of bigger animals causes more impact stress on landing.The unique vestibular systems of the cats and the gyroscopic turns they make that have their four feet pointing downwards before landing.The cats reach terminal velocity faster and extend their limbs reflexly to absorb the shock from the fall.The dissipation of the impact force due to their flexed limbs.Lastly, their evolutionary history that has seen them falling from trees frequently over the years.In his article, Jared Diamond profers several reasons why he believes that cats tend to suffer fewer injuries and fatalities after falling from different heights.
He believes that their mass which is lower in comparison to humans makes it possible for them to not suffer much impact force on landing.
The gyroscopic turns they make before landing makes it easier for them to land on their four feet thus suffering fewer injuries to the arms.
Their evolutionary history is another factor. Over the years, they have adapted so well to falling from heights.
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Oxygen is a reactant.
Select one:
a. Neither Photosynthesis nor Cellular Respiration
b. Both Photosynthesis and Cellular Respiration
c. Cellular Respiration
O d. Photosynthesis
Answer:
c
Explanation:
9. Which is the SI base unit of mass?
liter
meter
pound
kilogram
Answer:
it's D, KILOGRAM
Answer:
The answer of this question is kilogram
Explanation:
may this answer is helpful for you
Why, in your opinion, are there no final answers in science? Relate your answers to the study of the learning process.
Answer:
In science, answers do not have a final answer because not everything about the answer can be answered. Nothing can be told as 100% correct, and parts of the answer can change over time. For example, if you are doing a science project on how much water a plant needs to grow, each plant will grow differently, and you would have to wait and see how much water it needs to grow.
Hope this helped.
When a human egg is not fertilized, extra blood and tissue from the uterus are released through the vagina in a process called
Answer:
Unless the egg is fertilized by a sperm while in the fallopian tube, the egg leaves the body about 2 weeks later through the uterus — this is menstruation. Blood and tissues from the inner lining of the uterus combine to form the menstrual flow, which in most girls lasts from 3 to 5 days.
How do malignant transformed cells differ from normal cells? They are:
Answer:
In contrast to normal cells, cancer cells don't stop growing and dividing, this uncontrolled cell growth results in the formation of a tumor. Cancer cells have more genetic changes compared to normal cells, however not all changes cause cancer, they may be a result of it
What’s the following have contributed to historical increases in the global human population?
A.) increases in the number of deaths
B.) unavailability of clean water
C.) decreases in the birth rate
D.)Advances in hygiene
Answer:
D
Explanation:
people take it into account that the environment is fine for growing children hence giving birth
Invasive species occur throughout California. There are many mechanisms in which invasive species get introduced and then are able to thrive. One possible reason, of many, why the New Zealand mud snail was able to get established in Putah Creek was
Un ratón A de pelo blanco se cruza con uno de pelo negro y toda la descendencia obtenida es de pelo blanco. Otro ratón B también de pelo blanco se cruza también con uno de pelo negro y se obtiene una descendencia formada por 5 ratones de pelo blanco y 5 de pelo negro. ¿Cuál de los ratones A o B será homocigótico y cuál heterocigótico
Answer:
please translate to english
