Every scientific discovery is fantastic, and some of them actually change people's lives.
What is Scientific Discovries?life science community to see which scientific discoveries you believe are the greatest in order to show science some extra love (as if we could love it any more).
Here is a list of the top ten scientific breakthroughs of all time, as noted on our blog over the past year, in no particular order, including CRISPR, genome editing, and penicillin.
It has given scientists the ability to physically remove genes and the regulatory components that control them, as well as, more exhilaratingly, to monitor their activity.
Therefore, Every scientific discovery is fantastic, and some of them actually change people's lives.
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The correct examples of nonrenewable resources are:
petroleum, coal, and gas
water, petroleum, and coal
water, wind, and sunlight
sun, fossil fuels, and wind
Which phrase describes faults?
Answer:
socorrates dijo conócete a ti mismo
yo digo conócete a tus usuarios
y adivina que ellos no piensan como tú
Explanation:
conócete primero a ti mismo
Place the steps of the infection in the correct order.
1
2
3
4
5
6
7
LOL
LOL I also don't know the answer bro sorry
LOL
In a population there are 400 AA, 400 Aa, and 200 aa individuals. (a) Calculate allele frequencies. f(A) = 0.6 if(a) = 0.4 (b) Calculate predicted HWE genotype frequencies. f(AA) = 0.36 f(Aa) = 0.48 f(aa) = 0.16 (c) Is this population in Hardy-Weinberg equilibrium? Provide a chi-square value and p-value, and your statistical and biological decision. chi-square value = 15.23 X (round up your answer nearest 100th) 0.1 x > p-value > 0.05 IX Statistical decision: reject (reject / fail to reject) Biological decision: This population is not (is / is not) in HWE.
Based on the chi-square value and p-value, the statistical decision is to reject the null hypothesis that the population is in Hardy-Weinberg equilibrium. The biological decision is that this population is not in Hardy-Weinberg equilibrium.
Chi-square value: 15.23
P-value: 0.05
Statistical decision: Reject
Biological decision: This population is not in HWE.
Step 1: Calculate allele frequencies
To calculate allele frequencies, we need to know the total number of alleles in the population. In this case, there are 400 AA, 400 Aa, and 200 aa individuals, for a total of 1200 alleles. Since there are two alleles (A and a), we can calculate the frequency of each allele by dividing the total number of each allele by the total number of alleles:
f(A) = 400/1200 = 0.6
f(a) = 800/1200 = 0.4
Step 2: Calculate predicted HWE genotype frequencies
Using the allele frequencies, we can calculate the predicted HWE genotype frequencies using the equation:
f(AA) = f(A)*f(A) = 0.6*0.6 = 0.36
f(Aa) = 2*f(A)*f(a) = 2*0.6*0.4 = 0.48
f(aa) = f(a)*f(a) = 0.4*0.4 = 0.16
Step 3: Calculate chi-square value and p-value
The chi-square value is calculated by comparing the observed and expected frequencies of the genotypes in the population. In this case, the observed frequencies are 400 AA, 400 Aa, and 200 aa individuals, while the expected frequencies are 0.36 AA, 0.48 Aa, and 0.16 aa individuals. The chi-square value is then calculated as follows:
chi-square value = 15.23
The p-value is calculated by comparing the chi-square value to a chi-square table with 1 degree of freedom. In this case, the p-value is greater than 0.05.
Step 4: Make a statistical and biological decision
Based on the chi-square value and p-value, the statistical decision is to reject the null hypothesis that the population is in Hardy-Weinberg equilibrium. The biological decision is that this population is not in Hardy-Weinberg equilibrium.
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Can anybody tell me how cell shape affects function? For example if columnar and epithelial cells shapes affect their respective functions?
Answer:
Cell Shape: Large surface area = Function: Absorption/metabolism increases
Explanation:
The large the surface area of a cell allows for more receptors to interact to increase the amount of metabolism that occurs within the cell. The example you provided, columnar and epithelial cells, are found in various locations throughout the body but are most notable found in the intestinal lining of our intestines. The shape of the columnar which is made up of epithelial cells is waved shaped to allow for more surface area within a given location. Consequently, leading to further absorption.
Explain why plant forms of plankton are not as widespread throughout the depths of the oceans as the animal forms are
Explanation:
Phytoplankton is the base of several aquatic food webs . In a balanced ecosystem, they provide food for a wide range of sea creatures
Down in the ocean depths lot's of nutrients are available for the phytoplankton but without sunlight they can't grow phytoplankton use nutrients and must be transported to the surface
What type of glial cell is responsible for filtering blood to produce CSF at the choroid plexus? a. ependymal cell
b. astrocyte c. oligodendrocyte d. Schwann cell
Ependymal cell is the type of glial cell is responsible for filtering blood to produce CSF at the choroid plexus.
The central canal of the spinal cord and the ventricles of the brain are lined by ependymal cells, which produce cerebral spinal fluid (CSF). These cuboidal to columnar cells circulate and absorb CSF with the help of cilia and microvilli on their surfaces.
Ependymal cells have a role in the distribution of hormones and neurotransmitters related to the central nervous system, depending on their location. Additionally, the ependymal cells' microvilli have the ability to absorb CSF, control its flow, and allow specific chemicals to enter and exit the brain. The ependyma, like most glial cells, helps to osmotic homeostasis in the brain by regulating glucose and ions.
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Altruistic behavior in animals may be a result of kin selection, a theory maintaining that:
a) genes promote the survival of copies of themselves when behaviors by animals possessing those genes assist other animals that share those genes.
b) aggression within sexes increases the survival and reproduction of the fittest individuals.
c) companionship is advantageous to animals because, in the future, they can recognize those that have helped them and provide help to those individuals.
d) aggression between the sexes increases the survival and reproduction of the fittest individuals.
e) companionship is advantageous to animals because, in the future, they can recognize those that have helped them and request help once again.
Kin selection, which contends that genes are more likely to survive within a population when they result in actions that benefit other animals who share those genes, may be the cause of altruistic behavior in animals.
What is the kin selection theory in animal behavior?According to the kin selection theory, animals are more likely to show altruistic behavior toward their relatives than toward other members of their species. Furthermore, data suggests that the stronger the bond, the greater the degree of altruism.
What does altruistic behavior theory entail?When a person's actions are driven by a desire to help another person for that person's sake rather than their own, that behavior is typically referred to as altruistic. The phrase is used to contrast with being "self-interested" or "selfish."
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What would the genotype of the parent mice need to produce offspring with the genotypes. FF and Ff? (An empty punnet square is provided to show your work)
Show your work
The genotypes of the parents to produce offspring with the genotypes FF and Ff are FF and Ff.
What is Punnett square?The Punnett square is a graphical representation used to determine the frequency of a given genotype.
In this case, the Punnett square may be (alternatively, parents can also be heterozygous):
F f
F FF Ff
F FF Ff
In conclusion, the genotypes of the parents are FF and Ff.
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Which of the following is an environmental factor that could cause a mutation?
A. psychological agents
B. irrelevant mutagens
C. internal agents
D. biological mutagens
Answer: D. biological mutagens
Explanation:
3. How many limbs do organisms in the order Gymnophiona have? 1: two 2: multiple pairs 3 : none
the organisms in the order Gymnophiona have no limbs. Option 3
What is Gymnophiona ?
Gymnophiona also called Apoda, area known as one of the three major orders of the class Amphibia.
Its members are known as caecilians which means “sightless” or “blind.”
Majority of the organisms in this group are limbless and wormlike amphibians that live underground in humid tropical regions throughout the world.
They are believed to have internal fertilization.
Their heads are blunt, and their skulls are bony and compact in nature.
Since they are limbless, they have no limbs
Thus, the organisms in the order Gymnophiona have no limbs. Option 3
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Answer:
I hope this helps.
Explanation:
18. Which of the following organisms do NOT produce gametes?
Spiders
Bacteria
Humans
Giraffes
ILL GIVE BRAINLIEST Question 3 of 5
What is one way that poor air quality can create problems for humans in the
United States?
A. The loss of trees damages the surrounding ecosystem.
B. Some people lose their vision.
C. The process leads to algal blooms in rivers, streams, and lakes.
D. Some people develop allergies or breathing issues.
Some people develop allergies or breathing issues is one way that poor air quality can create problems for humans in the United States.
What level of air quality is safe?The level of poor air quality and the resulting health risk increase with increasing AQI values. An AQI value of 50 or less, for instance, suggests clean air, even though one of over 350 indicates polluted air.
How does the quality of the air influence you?Poor air quality can aggravate asthma and related disorders, irritate ones eyes, nose, & throat, induce shortness of breath, and have negative effects on the heart and circulatory system. Long-term exposure to contaminated air can result in more severe issues.
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When is the cell cycle needed/used? Select all that apply.
O Growth for organisms
O Replacing old cells
O Making sex cells
O Repairing damaging cells
The Sanger method of DNA sequencing requires which of the following to be in the reaction tube? Choose one: O A. template DNA O B. deoxyribonucleotides O C. dideoxyribonucleotides O D. A, B, and C are correct. O E. Only A and B are correct. O F. Only A and Care correct.
D. A, B, and C are correct regarding DNA sequence. A technique for figuring out the nucleotide sequence of DNA is called Sanger sequencing, commonly referred to as the chain termination method.
Frederick Sanger, a two-time Nobel laureate, and his colleagues invented the technique in 1977; hence, the Sanger Sequence. DNA template, DNA sequence primer, thermostable DNA polymerase, nucleotides (dNTPs), dideoxynucleotides (ddNTPs), buffer, and dideoxynucleotides (ddNTPs) are needed for Sanger sequencing. Sanger sequencing is a technique for DNA analysis that uses electrophoresis and is based on DNA polymerase's haphazard incorporation of chain-terminating dideoxynucleotides during in vitro DNA replication. It is frequently used to check for known familial variations, to validate NGS results, and in rare cases, for single gene sequencing.
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Which of the following statements regarding the cell cycle are true?
It has three cell cycle checkpoints.
It is regulated by cyclins and CDKs.
Different levels of cyclins are observed at different cell cycle stages.
It can be "paused" by the action of p53.
All of the answer options are true.
All of the answer options regarding the cell cycle are true.
The cell cycle consists of a series of steps in which chromosomes and other cellular material are replicated to create two copies. The cell then divides into her two daughter cells, each receiving a replicated copy of the substance. The cell cycle is completed when each daughter cell is surrounded by its own outer membrane.
The cell cycle consists of interphase (G 1 , S, and G 2 phases) followed by mitotic phases (mitosis and cytokinesis) and G 0 phases.
The cell cycle can be viewed as the life cycle of a cell. In other words, the sequence of growth and development steps by which a cell undergoes its “birth”, i.e. formation and reproduction by division of the mother cell, dividing to produce two new daughter cells.
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Two individuals who are heterozygous for Huntington’s are pregnant with a child. What is the probability that the resulting child will not inherit Huntington’s disease ?
Calculate the probability. The Punnett square is provided to show your work
The probability that the resulting child will not inherit the disease is 25%.
Probability in geneticsAssuming that the disease is represented by the allele A (a). Huntington's disease is autosomal dominant.
Thus, the genotypes of the two parents will be Aa each.
Aa x Aa
AA Aa Aa aa
Probability of the child having Huntington's = 3/4 or 75%
Probability of the child not having Huntington's = 1/4 or 25%
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. Which season is the Southern Hemisphere experiencing in the picture?
Answer: summer
Explanation:
Which of the following is NOT one of the three main types of stressors? a. Catastrophes b. Significant life changes c. Daily hassles d. Loss of personal control
C. Daily hassles is NOT one of the three main types of stressors.
Any factor is referred to as a stressor if it causes the release of stress hormones. Physiological (or bodily) and psychological stressors are the two main categories of stressors. When someone has little to no influence over how a situation will turn out, this happens. have obligations that are too heavy for you. Your life isn't busy enough, active enough, or changing enough. You might experience abuse, hostility, or discrimination. Contrarily, anxiety is defined by excessive worry that continues even when there is no stressor.
causes of stress include:
important adjustments in one's life.
Education or employment.
connections that are difficult
concerns with money.
being too preoccupied
a family and kids.
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What has happened to atmospheric carbon dioxide level and global temperature since the graph in the interactive, which was created in the year 2014?
There has been a rise in the atmospheric carbon dioxide level and global temperature since 2014.
What is Temperature?This is referred to as the degree of hotness or coldness of a substance or body and its SI unit is Kelvin.
Carbon dioxide has been on the rise due to it being formed from the combustion of fossil fuel burning thereby leading to global warming.
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At present, which hypothesis regarding white-nose syndrome seems to be supported by the most evidence?
Please choose the correct answer from the following choices, and then select the submit answer button.
Answer choices
opportunistic hypothesis
viral spread hypothesis
novel pathogen hypothesis
mutation hypothesis
The majority of the evidence appears to support the novel pathogen hypothesis for white-nose syndrome.
Unknown respiratory pathogens: what are they?There may be cause for concern if a newly discovered respiratory pathogen, often known as an emerging and novel respiratory pathogen, causes severe acute respiratory illnesses.
What's the point of it?In literary language, a book is a lengthy narrative work. Both entertainment and story-telling are goals of narrative prose. A group of characters, a location, and an outcome are all described in the description of a series of events. Depending on the genre, the majority of publishers favor novels that are between 80,000 and 120,000 words long.
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Make sure the answers to all four questions are correct. 100% correct answer. Thank you
Chicken, beef, pork, and egg are sources of protein from most efficient to least efficient.
option(a) and option(b) i.e, being an informed consumer and buying locally farmed produce supports sustainable agriculture.
overnutrition is consuming more calories than necessary. undernutrition is consuming less calories than necessary. malnutrition is not consuming enough food to gain specific nutrients needed to sustain life.
option ( a, b, e, f, i, and j ) are risks of using pesticides.
Large biomolecules and macromolecules known as proteins are made up of one or more extended chains of amino acid residues. It aids in cell regeneration and repair in your body.
Sustainable agriculture is the practice of farming in a way that satisfies society's current demands for food and textiles without endangering the ability of present or future generations to meet their own needs. It might be founded on knowledge of ecosystem services.
The biochemical and physiological process by which an organism uses food to sustain its life is known as nutrition. Consumption, absorption, assimilation, biosynthesis, catabolism, and excretion are all included. Nutritional science is the field of study that focuses on the physiological aspects of nutrition.
Pest control agents are compounds known as pesticides. Insecticide, nematicide, molluscicide, piscicide, avicide, rodenticide, bactericide, insecticide, animalized, microbicide, fungicide, and lampricide are some examples of these.
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Answer the question stated
Answer:
Methane is formed as a result of Mining of coal
2. Bone
A 68-year-old Asian female presents with mildly achy muscles and joints. The aches seem to “come and go” quite often lasting for several days at a time. Upon examination you take note of a hunch-backed appearance on the patient. An x-ray is performed and showed a significant decrease in bone tissue mass. After further diagnostic testing is performed the patient is diagnosed with Osteoporosis. TAKE NOTE: Osteoblast cells build bone matrix while osteocytes maintain the matrix. Osteoclast cells break down bone matrix and reabsorb the nutrients.
Using your knowledge of the human physiology, which of the following do you predict is a potential cause of the Osteoporosis?
A. Decreased osteoblast activity B. All choices are potential causes
C. Increased osteoclast activity D. Secondary to external factors like drugs/cancers
Osteoporosis causes bone density to decrease due to decreased osteoblast activity, increased osteoclast activity, and external factors like long-term medication. Option B. All choices are potential causes.
What are the factors that promote osteoporosis?
Let us first review what the bone cells are and their functions,
• Osteoprogenitores → in charge of osteocytes production
• Osteocytes → maintain the matrix
• Osteoblasts → Synthesize and secrete osteoid matrix that will later calcify
• Osteoclasts → Phagocytic cells in charge of osseous resorption and bone modulation.
Osteoporosis is a no-symptoms disease -silent- that causes a decrease in the bone mineral and mass density and might change the bone structure.
Osteoporosis weakens the bone until it breaks. So this affection becomes evident when a fracture occurs.
Several factors lead to osteoporosis development. Among them, we can mention,
genetic factors, habits factors (lifestyle),hormonal alterations,drugs/medication
The increased rate of bone resorption is the major mechanism by which osteoporosis occurs. It deteriorates bone structure and decreases bone density.
Bone resorption and deterioration might be caused by
a decrease in osteoblast activity, leading to the decrease in osteoid matrix formation and calcification,an increase in osteoclast activity, enhancing the activity of these phagocytic cells.
Other external factors also increase the probability of developing osteoporosis. Some of them are,
long-term medications (for instance, those used in cancer treatment) excessive alcohol consumption and smokingsedentary lifestylepoor dietAccording to this framework, the potential causes of the Osteoporosis are Decreased osteoblast activity, Increased osteoclast activity, Secondary to external factors like drugs/cancers.
Hence, option B is correct, All choices are potential causes.
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Select the description of sensory receptors.
1. A group of neuron cell bodies located in the CNS
2. Organs of the PNS that conduct impulses toward the CNS
3. Cells that detect changes in the body or external environment
4. The axon terminals of efferent fibers that synapse with muscle fibers
Please help!!
Choose the set of organisms that would most likely be considered to be one family.
According to phylogenetic tree, the organisms of 5 and 15 would most likely be considered to be one family.
What are the characteristics of phylogenetic tree?A phylogenetic tree is a branching diagram or a tree showing the evolutionary relationships among various biological species or other entities based upon similarities and differences in their physical or genetic characteristics.
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Phylogenetics is a powerful approach in finding evolution of current day species. By studying phylogenetic trees, scientists gain a better understanding of how species have evolved while explaining the similarities and differences among species.
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can samone help me fill this diagram
Starting by the top, the yellow sphere is an Amino Acid. On it's left is a Protein, formed by a chain of Amino Acids. To the right of the Amino acid it is a tRNA, the responsible for carring the Amino Acids. Under the tRNA, the arrow pointing to a red part is showing a Ribossome. Under the Ribossome box, the arrow is point to the A site of the Ribossome; and on the other side is the E site of Ribossome. At the bottom, the arrow that is pointing to the bottom part of the Ribossome is pointing to a Codon. And the last one at the left bottom site is pointing to the mRNA.
What is translation?
Translation involves "decoding" a messenger RNA (mRNA) and using its information to produce a polypeptide or chain of amino acids. Overall, a polypeptide is basically a protein (with the technical difference that some large proteins are made up of many polypeptide chains).
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carbohydrates and lipids
Answer: what about carbohydrates and lipids you're asking about?
Explanation:
Question- forests provide a habitat for many organisms in addition they reduce the amount of dioxide in the atmosphere and produce oxygen what does it mean to say that forests must not only be managed but they must be managed in a sustainable way.
A Quiz: Impacts on Land
on Land
savvasrealize.com
OB. They should be protected from floods.
OC. Trees should be cut in large numbers at a time.
OD. They should be kept usable by future generations.
Savva
Forests provide a habitat for many organisms. In addition, they reduce the amount of carbon dioxide in the atmosphere and produce oxygen. What de
not only be managed, but they must be managed in a sustainable way?
OA No trees should be cut down at all.
forests provide a habitat for many organisms in addition they reduce the amount of dioxide in the atmosphere and produce oxygen. it mean to say that They should be kept usable by future generations.
Describe a forests.The most effective ecosystem in nature is a forest, where a high level of photosynthesis has an impact on both the animal and plant systems in a web of intricate biological interactions.
Why are forests significant?The importance of forests cannot be overstated. We rely on trees for everything we need to thrive, including the oxygen we breathe and the lumber we use. Forests provide more than simply a place for animals to live and a way for people to survive. They decrease the consequences of climate change, safeguard soil erosion, and safeguard watersheds.
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Scientists sometimes say that we know less about the oceans than the far side of the Moon. Why is it so difficult to learn about the oceans?
We know more about the moon because we have more tools to get there and when it comes to the ocean we don't have to tools to get there yet to even learn about it.