In addition to fossil evidence for evolution, other lines of evidence can include:
What are things to look for to know if an example or idea is science or nonscience?
Alcohol interacts with more types of receptors, neurotransmitters, and genes than do marijuana and cocaine.
In this experiment, why didn't we just use ethanol to extract the trimyristin (instead of dichloromethane)? this would have saved us a step and we would have been able to recrystallize directly after filtration.
Dichloromethane was preferred over ethanol for extracting trimyristin due to its nonpolarity and volatility, facilitating an efficient extraction process and easy removal post-extraction. Although ethanol could have simplified the process, it may have resulted in a less efficient extraction and compromised yield and purity due to its polarity.
Explanation:In this experiment, dichloromethane was used rather than ethanol to extract the trimyristin due to certain properties it possesses. The choice of solvent can significantly impact the efficiency of the extraction process.
Primarily, dichloromethane is an excellent solvent for this procedure because it is nonpolar, and can dissolve a wide range of organic compounds, including trimyristin. It is also volatile, which makes it easy to remove by evaporation post-extraction.
On the other hand, ethanol, an alcohol, is a polar solvent, and is less efficient at dissolving nonpolar substances such as trimyristin. Yes, it's true that ethanol could have been used in this experiment, simplifying the process to one-step as recrystallization could be done directly after filtration. However, using ethanol might have resulted in a less efficient extraction due to its polarity, which could compromise the yield and purity of trimyristin obtained.
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Answer: doot
Explanation:
Recently, a microbe that is able to digest cellulose was discovered in a hot spring with an average temperature of 95°c. predict the group to which this microbe most likely belongs.
______ years ago, nearly 75-80% of all species of life on Earth were wiped out in an incredibly short period of time.
Answer:
Sixty-five million years ago
Explanation:
The Cretaceous Mass Extinction occurred nearly sixty-five million years ago. It is supposed to be caused by asteroids. The Cretaceous mass extinction resulted in the extinction of many marine organisms as well as all the dinosaurs that flourished during the Jurassic period. In addition to these animal species, the existing plant species, as well as amniotes, also disappeared in a relatively short period of time.
How did the introduction or extermination of the species impact society?
Label each level of dna packaging in the eukaryotic chromosome with the appropriate term.
DNA or deoxyribonucleic acid is known to be the genetic material for almost all organisms. It is tightly packed within the nucleus of every cell and wraps around the unique proteins known as histone. These histones form the loops of DNA called nucleosomes.
Further Explanation:
The genetic information is known to be packaged in 23 sets of chromosomes. In these, histones which are the proteins that aid the molecule of DNA to be very tightly packed in added and also aids in maintaining the double-helical structure of the DNA.
The thread-like structure provided in the diagram is known as chromosome. Chromosomes are found in the nucleus and it is composed up of protein as well as single molecule of DNA. The bunch like structures present is known as nucleosomes that are considered to be the basic unit of the DNA packaging.
The histone units make the structural units of the nucleosome and these units and bounded in the tight helical fiber. Finally, is the structure of DNA, which is known to be the genetic material.
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Learn more about component of DNA https://brainly.com/question/334927 Learn more about base pairing https://brainly.com/question/2491455 Learn more about RNA base pairing https://brainly.com/question/2416343
Answer Details:
Grade: High School
Subject: Biology
Chapter: Molecular Biology
Keywords:
DNA, histones, nucleosomes, chromosome, histone protein, double helix, tight helical fiber,protein, DNA packaging, genetic material.
What have researchers concluded from the fossil remains of hominin feet from south africa?
Which of the sexually transmitted diseases was left out of the center for disease control study referred to by mackinnon?
The brain can comprehend messages delivered at:
The heart exhibits _____, meaning that the heart itself is responsible for initiating the heartbeat.\
The heart's automaticity and the role of the SA node are crucial in initiating heartbeats independently.
The heart exhibits automaticity, meaning that the heart itself is responsible for initiating the heartbeat. For example, the sinoatrial (SA) node acts as the heart's natural pacemaker, generating electrical impulses to regulate heartbeats.
The term used to identify conditions that are brief and severe is:
What is the name of a crack in Earth's crust caused by moving tectonic plates?
What is the pathophysiologic mechanism for elevated temperature that occurred several days after the onset of acute myocardial infarction?
Please answer as soon as possible.........In which process are the products of the reaction glucose and oxygen?
A. photosynthesis
B.celluar respiration
C.ATP production
D.ADP production
Write a small essay on the origin of life
The origin of life on Earth is still not fully understood, but there are several theories. Organic molecules may have formed in a reducing or non-reducing atmosphere, and the RNA World hypothesis suggests an RNA-based system.
Explanation:The origin of life on Earth is a topic that has fascinated scientists for many years. While the exact process is still not fully understood, there are several theories about how life may have originated. One theory suggests that organic molecules were formed in an earthly reducing atmosphere, while another theory proposes that they formed in a non-reducing atmosphere. Additionally, the RNA World hypothesis proposes that life's chemistries originated in an RNA-based system.
Which structure is found in both cartilage and bone
Phrases such as "slow down!" "look up!" and "key point!" are all examples of:
These are examples of interjection. Interjection is a part of speech that denotes feeling and emotion. For instance, “that hurts!”, “cool!” and “beautiful!”. If noticed, these are accompanied by an exclamation point which highlight the authors point of emotion with respect to their statement.
In cumulene, what are the c=c=c and h−c−h bond angles, respectively? enter the c=c=c bond angle followed by the h−c−h bond angle separated by a comma.
How would the formation of bacterial colonies be affected if bacterial cells did not contain pili?
The formation of bacterial colonies would be affected if bacterial cells did not contain pili. Pili are filamentous appendages that aid in attachment to surfaces and transfer of genetic material between cells.
Explanation:If bacterial cells did not contain pili, the formation of bacterial colonies would be affected. Pili are filamentous appendages that aid in attachment to surfaces and are also involved in the transfer of genetic material between cells. Without pili, bacteria would have difficulty attaching to surfaces and forming colonies. This would impact their ability to interact with their environment, including other bacteria and host organisms.
In which locale would carotene fail to accumulate
Oils produced by your skin fall under which category of macromolecules?
a. nucleic acids
b. proteins
c. carbohydrates
d. lipids
From 2010 to 2011 the percentage of electricity generated from burning coal fell, while the percentage of renewable energy sources such as solar and hydroelectric went up. What effect would this change have on the atmosphere?
A) More oxygen would be released into the atmosphere.
B) Less oxygen would be released into the atmosphere.
C) Less carbon dioxide would be released into the atmosphere.
D) More carbon dioxide would be released into the atmosphere.
Which of the following is a common extrusive igneous rock?
A. basalt
B. diorite
C. granite
D. gabbro
_____ refers to an individual's sense of having a choice in initiating and regulating actions.
What evidence suggests that the inner mitochondrial membrane has evolved from a bacterial plasma membrane?
People with type o-negative blood are referred to as universal donors, although if you give type o-negative blood to any patient you run the risk of a transfusion reaction due to certain antibodies present in the blood. however, any patient can receive a transfusion of o-negative red blood cells. only 9.4% of the american population have o-negative blood. if 12 people appear at random to give blood, what is the probability that at least one of them is a universal donor? (use 4 decimal places.)
The probability that at least one person in a randomly selected group of 12 is a universal donor (type O negative) is approximately 69.6% or in 4 decimal places 0.6959.
Explanation:The question involves calculating the probability of getting at least one universal donor (type O negative) in a randomly selected group of 12 people. We know that only 9.4% of the American population is a universal donor. Calculating the probability involves first determining the probability of not having a single universal donor in the group and then subtracting this from 1 to get the actual probability.
First, calculate the probability that a single individual is not a universal donor, which is 1 - 0.094 = 0.906 (90.6%). This must be raised to the power of 12, because this situation needs to occur 12 times in a row (none of the 12 individuals are universal donors). Mathematically, it is represented as (0.906)^12 = 0.304.
This means there is a 30.4% chance that in a group of 12 people, no one is a universal donor. But, the question asks for the probability that at least one person is a universal donor. So, we subtract this probability from 1 (representing 100% certainty). Thus, 1 - 0.304 = 0.696 or 69.6% (4 decimal places: 0.6959) is the probability that within a group of 12 people randomly chosen, at least one is a universal donor (type O negative).
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The probability of at least one of the 12 random people being a universal donor, given a 9.4% prevalence rate of O-negative blood in the population, is 0.5680 or 56.80%.
The probability of at least one person being a universal donor when 12 people appear at random to give blood, given that 9.4% of the American population have O-negative blood, can be calculated using the concept of complementary probability.
This means we first find the probability that none of the 12 people are universal donors and subtract that from 1.
The probability of a person not being a universal donor is 1 - 0.094 (since 9.4% are donors, then 100% - 9.4% = 90.6% or 0.906).
For 12 independent donors, the probability that all are not universal donors would be (0.906)¹².
To find the probability that at least one is a universal donor :
= 1 - (0.906)¹²
= 1 - 0.4320
= 0.5680 or 56.80%
Thus, the probability that at least one person is a universal donor out of 12 random people is 0.5680 (or 56.80%), when rounded to four decimal places as specified.
N eukaryotes, newly synthesized proteins encoded in genes in the nucleus are found in the _____ and dna are observed in the _____.
Final answer:
In eukaryotic cells, proteins encoded by nuclear DNA are synthesized in the cytoplasm at ribosomes, while DNA is contained within the nucleus. mRNA serves as the intermediary that carries genetic information from DNA in the nucleus to ribosomes in the cytoplasm where it is translated into protein, following the central dogma of molecular biology.
Explanation:
In eukaryotes, newly synthesized proteins encoded in genes in the nucleus are found in the cytoplasm and DNA are observed in the nucleus. Proteins are synthesized at ribosomes in the cytoplasm or on the rough endoplasmic reticulum (RER) after the encoding information is transported from DNA as messenger RNA (mRNA).
The molecular process starts with DNA in the nucleus, where transcription into RNA occurs. Subsequently, this RNA, particularly mRNA, travels through nuclear pores into the cytoplasm. There, ribosomes translate the RNA into proteins in a process called translation. This sequence of events, from DNA to RNA to Protein, is a cornerstone of molecular biology known as the central dogma.
DNA is found within chromosomes and is tightly associated with proteins to form chromatin. Some RNA types, like rRNA and tRNA, are also transcribed in the nucleus and play significant roles in protein synthesis. The organization and regulation of these processes are fundamental to the function and complexity of eukaryotic cells.