1. What three conclusions did de Vries arrive at with his study on genetics?
Answers
Hugo de Vries was a Dutch botanist who conducted extensive research on genetics, particularly on the theory of inheritance. Through his studies, de Vries arrived at three main conclusions. Firstly, he discovered that genes can undergo mutation, and that these mutations can lead to variations in traits.
This finding was in contrast to the previous notion that traits were determined solely by the environment or the combination of parental traits.
Secondly, de Vries proposed the concept of "mutation theory," which suggests that new species can emerge from the accumulation of mutations. This theory challenged the idea of gradual evolution and emphasized the importance of sudden, radical changes in the development of new species.
Lastly, de Vries's work provided evidence for the existence of genes, which were then considered the basis of heredity. He demonstrated that genes were responsible for the transmission of traits from one generation to the next.
Overall, de Vries's findings laid the groundwork for modern genetics and provided crucial insights into the mechanisms of inheritance and evolution.
De Vries, a Dutch botanist, made significant contributions to the field of genetics through his studies. He arrived at three main conclusions:
1. Mutations: De Vries discovered that new traits in organisms could arise suddenly, resulting from changes in their genetic material. These changes, known as mutations, could be passed on to subsequent generations. This concept challenged the prevailing idea of gradual evolution and highlighted the importance of mutations in the process.
2. Rediscovery of Mendel's Laws: Along with Carl Correns and Erich von Tschermak, de Vries independently rediscovered Gregor Mendel's laws of inheritance, which had been overlooked for several years. Mendel's principles provided a foundation for the study of genetics, demonstrating how traits are inherited through generations and how they can recombine in offspring.
3. Theory of Intracellular Pangenesis: De Vries proposed a theory called intracellular pangenesis, suggesting that particles called "pangenes" within cells were responsible for the transmission of hereditary traits. While this theory was later proven to be incorrect, it helped pave the way for the discovery of genes and the understanding of their roles in inheritance.
In summary, de Vries's work on genetics led to the recognition of mutations, the rediscovery of Mendel's laws of inheritance, and the development of an early theory on hereditary traits transmission. These conclusions significantly advanced our understanding of genetics and EVOLUTION
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Related Questions
What main factor distinguishes tropical rain forest from northwestern coniferous forest?
A. Average temperature
B. Average precipitation
Answers
Answer:
Average precipitation
Explanation:
The precipitation causes the distinguishing of tropical rain forest to northwestern coniferous forest
I’m terms of volume how does the size of a red blood cell compare to the size of an enterocyte. Red blood cell average volume 100. Enterocyte average volume 1400.
Answers
Explanation:
The average volume of a red blood cell is 100 times smaller than the average volume of an enterocyte.
6. What type of energy do missiles have? b. Nuclear a. Chemical d. Thermal
Answers
Answer:
Explanation:
nuclear energy
Answer:nuclear
Explanation:
After watching a Netflix documentary that details the effect rising CO2 levels in the atmosphere have on global warming, your uncle claims that excess CO2 in the atmosphere is good for plants, because they need it for photosynthesis. He also says that rising temperatures are good because it makes chemical reactions happen faster. State if you think this opinion has scientific merit and justify your answer. Please be specific with factors that affect photosynthesis!!
Answers
Answer:
No it does not. The effects of global warming have taken drastic effects on Earth and the carbon dioxide is not good whatsoever in the Earth's atmosphere. It may play a role but having a larger quantity is not good.
Explanation:
Most plants have a sweet spot for photosynthesis between 85 and 95 F. Below this, and chemical reactions are slower, above this, and the plant starts shutting down because it's losing water too rapidly. (Plants in very humid climates can do better this way). So plants in areas that have cool summers will generally do better -- as long as it isn't *so* much warmer that they are no longer adapted. Plants that are in warmer areas will do worse -- they spend more time, on average at temps too high to photosynthesize.
But WAIT, there's MORE.
With more CO2 plants grow faster. This is used in greenhouses, and they will run the CO2 up to a thousand parts per million.
There are two classes of photosynthesis referred in the literature as C3 and C4. Turns out that C3 plants don't benefit much from increased CO2, but C4 plants do. A lot of our food crops are C3. Most of our weed crops are C4. So increased CO2 overall helps the weeds at the expense of the crops.
THAT's not ALL
If you don't act now, we will include at NO EXTRA CHARGE, Shifting Rainfall Patterns. Your farm can have a different amount of rain than everyone is used to.
Even in places that get the same average rainfall each year, the variance may be different. E.g. June rain records for 10 years:
3, 3.5, 3, 4, 3.5, 4, 5, 2.5, 3, 2.5 = average 3.4
2, 5, 2,3, 3, 2, 6, 2.5, 5, 1.5 = average 3.4
(if I've not screwed up my arithmetic) But look at how much more variation there is in the second one. The century from 1880 to 1980 was one of the most stable ones in history. This means more crop failures. More heat waves AND more cold snaps -- but with the heatwaves over balancing the cold snaps overall. More droughts and more floods. Take a look where you live. If you live on a flood plain, think about moving. If your street has ever had a rain that was more than the storm drains could cope with; if you are on a coast that has *ever* been hit with a hurricane, or paralyzing winter storm that brought the city to a halt and created wide spread property damage; if you live in a region subject to evacuations for forest fire then give some thought to how you are going to cope with the next natural disaster.
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Now to the main center: Does a higher concentration of CO2 in the atmosphere enhance photosynthesis?
It can. It’s not the only factor, but everything else being equal, an increase in CO2 from the pre industrial level of 280 PPM up to current 420 PPM does help plants grow faster.
Everything else isn’t always equal though, so the entire Earth isn’t getting greener, contrary to what some people claim. Parts of the Earth are less green as a result of the increase in CO2. Some parts are flooded by salt water and the soil is harmed. Some parts are drier and prone to increased drought or wild fires, or prone to larger temperature shifts, so it’s not all good news. Not even close. In fact, climate change brings significantly more harm than benefit.
But to the specific question, higher CO2 can increase the rate of photosynthesis and the rate of plant growth, which can also lead to less nutrition in those plants if they are being grown for food.
Which phrase best reflects the author’s view of Greece?excerpt from The Homecoming
Answers
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Answer: fond memory
Explanation:
means to detect the amelogenin gene are included in commercial str kits used in crime labs because the gene allows determination of:
Answers
Means to detect the amelogenin gene are included in commercial STR kits used in crime labs because the gene allows determination of Ethnicity.
The sex of the person who provided a DNA sample can be determined by the amelogenin gene. Y-STRs are male-specific and helpful for identifying DNA mixes that include numerous males.The amelogenin protein, which is required for healthy tooth development, is made according to instructions provided by the AMELX gene. Amelogenin plays a role in the development of enamel, the firm, white substance that makes up each tooth's exterior protective coating.
Hence, Commercial STR kits are utilized in crime laboratories because the gene enables ethnicity determination.
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Bonus Problem (+6pts) For the following problem, state which distribution should be used to solve the problem and then solve the problem. 1. A bank receives an average of 8 bad checks per day. What is the probability that during a five day bank week, the bank will receive 50 bad checks? 2. It is commonly stated that one out of every two marriages will end in divorce. Assuming this is true, what is the probability that of ten randomly selected married couples, seven of the couples' marriages end in divorce? 3. Suppose that some of the local dog breeders' ten newborns have a genetic birth defect that will only appear later in life. Due to the high expense of the testing, the breeder randomly chooses only three puppies to test for the genetic birth defect. What is the probability that one of the puppies will test positive for a genetic birth defect?
Answers
1. For the first problem, we can use Poisson Distribution. Poisson distribution is used to calculate the probability of a certain number of events happening in a fixed interval of time, given the average number of occurrences in that interval.
The formula for Poisson distribution is: P(x) = (e^-λ * λ^x) / x!
where x is the number of events, e is the Euler's number (approximately 2.71828), λ is the average number of events in the interval.
Using the given information, the average number of bad checks received per day is 8, and we want to find the probability of receiving 50 bad checks in 5 days. So, the average number of bad checks received in 5 days is 8*5=40. Using the Poisson distribution formula, we get:
P(x=50) = (e^-40 * 40^50) / 50!
= 0.0136 (approx)
Therefore, the probability that during a five day bank week, the bank will receive 50 bad checks is approximately 0.0136.
2. For the second problem, we can use Binomial Distribution. Binomial distribution is used to calculate the probability of a certain number of successes in a fixed number of independent trials.
The formula for binomial distribution is: P(x) = (nCx) * p^x * (1-p)^(n-x) where x is the number of successes, n is the total number of trials, p is the probability of success in each trial.
Using the given information, the probability of a marriage ending in divorce is 0.5, and we want to find the probability of 7 out of 10 marriages ending in divorce. So, n=10, x=7, p=0.5. Using the binomial distribution formula, we get:
P(x=7) = (10C7) * 0.5^7 * 0.5^(10-7)
= 0.1172 (approx)
Therefore, the probability that of ten randomly selected married couples, seven of the couples' marriages end in divorce is approximately 0.1172.
3. For the third problem, we can use Hypergeometric Distribution. Hypergeometric distribution is used to calculate the probability of a certain number of successes in a fixed number of trials, without replacement. The formula for hypergeometric distribution is: P(x) = (M choose x) * (N-M choose n-x) / (N choose n) where x is the number of successes, n is the total number of trials, N is the total number of items, M is the number of items with the desired characteristic.
Using the given information, the total number of newborn puppies is 10, and some of them have a genetic birth defect. The breeder chooses 3 puppies randomly to test for the genetic birth defect, and we want to find the probability that one of the puppies will test positive for a genetic birth defect. So, M is the number of puppies with the genetic birth defect, which is not given. However, since we are only interested in the probability of one of the puppies testing positive for the genetic birth defect, we can assume that M=1. Then, N-M is the number of puppies without the genetic birth defect, which is 9.
Using the hypergeometric distribution formula, we get:
P(x=1) = (1 choose 1) * (9 choose 2) / (10 choose 3)
= 0.3 (approx)
Therefore, the probability that one of the puppies will test positive for a genetic birth defect is approximately 0.3.
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which defnse mechanism is a client using when the client's hands are raw and bloody from a ritual involving frequent hand watching
Answers
The client is likely using the defense mechanism of denial, which is the refusal to accept reality. With denial, the person is denying the fact that their hands are raw and bloody from the ritual and instead believing that their hands are not affected in any way.
The client is likely using a defense mechanism known as isolation. Isolation is a psychological defense mechanism in which the individual separates certain feelings or thoughts from the rest of their conscious experience. In this case, the client is separating the feelings of pain and discomfort associated with the ritual from their conscious experience in order to avoid experiencing them.
Step by step, this process might look like the following:
1. The client notices the physical pain in their hands from the ritual.
2. The client consciously acknowledges the pain but attempts to distance themselves from it, separating it from their conscious experience.
3. The client begins to focus on other things in order to distract themselves from the pain, such as their breathing, a mantra, or a visualization.
4. The client continues to distract themselves until the pain is no longer a conscious part of their experience.
5. The client is able to return to their normal activities without experiencing the pain.
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Through a careful process of Selective breeding, dog breeders mixed different dogs with different physical traits to create new forms. Darwin was intrigued by what he was seeing breeders could do with domestic dogs. They could select forindividual such as size or shape, and they could change the look of their breed
Answers
Selective breeding is the process of deliberately breeding animals with desired traits.
Dog breeders have used this technique to create new breeds of dogs by mixing different breeds with specific physical traits. Through this process, breeders can choose and reinforce desired characteristics, such as size or shape, leading to a change in the appearance of their breed. Darwin was fascinated by this ability of breeders to manipulate the looks of domestic dogs.
Selective breeding has been used not only in dogs but in other domestic animals and plants to produce desired traits. It is a crucial tool in agriculture and animal husbandry, and has played a significant role in shaping the diversity of species we see today.
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whoever answers this correctly gets brainliest
Answers
Answer:
its 2. Jim Bob
Explanation:
Fitness in this sense means how much an organism produces and how well that organism adapt to an environment
Ok, last one, and i'm done for today!
What type of bond forms between Complementary base pairs?
Answers
Answer:
hydrogen bonds form between Complementary base pairs
Explanation:
The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds.
Baby Weston's digestive system did not fully develop and does not function properly. This problem likely arose from a defect in the formation of
A) the mesoderm.
B) the endoderm.
C) the ectoderm.
D) any of the three layers.
Answers
Since baby Weston's digestive system is not fully developed and does not function properly, the problem likely arose from a defect in the formation of the endoderm.
The gastrointestinal or the GI system includes three germinal layers namely the mesoderm, endoderm and the ectoderm. The mesoderm gives rise to the connective tissue which include the wall of the gut tube and the smooth muscle.
Endoderm is basically the source of the epithelial lining of the gastrointestinal tract, gallbladder, pancreas, liver. Ectoderm further separates in surface ectoderm, neural tube, and the neural crest. Since baby Weston's digestive system is not fully developed and does not function properly, the problem likely arose from a defect in the formation of the endoderm.
Hence, the correct option is B) the endoderm.
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Jason and Lyric both are trying to enter Harmony House. Jason pushes on the door with a force of 5N right and Lyric pushes on the door with a force of 3N to the right.
Answers
the total number of pushes all together will be 8N
protein question 12 options: is a major component of body structures. supplies 9 kcal per gram. is a significant energy source for humans. functions as a solvent.
Answers
The correct answer for this question is fats or lipid, fats are major sources of energy providing 9 kcal per 1 gram and they work as a solvent.
We consume nutrients from the meals we eat. The term "organic" refers to nutrients that include carbon, whereas the term "inorganic" refers to nutrients that do not. The body needs nutrients in order to carry out its essential tasks.
Nutrients are necessary since the body cannot produce them and must instead get them from the food. Insufficient dietary intake can lead to bad health. Lipids' primary function is to store energy. Lipid play several roles in the body, including regulating temperature, protecting organs from damage, acting as cell membranes, and storing energy.
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Prompt 4: Describe what is meant by the 3 following levels of
biodiversity- Genetic, Species,
and Habitat/Ecosystem. Then:
A. Why is maintain genetic diversity within a population thought to be crucial to the
preservation of a species? How is genetic diversity influenced by habitat
fragmentation?
B. According to the biological species concept, what is a species? Why is the question
of what species is important in the conservation of organisms?
C. What is the difference between species richness and eveness?
D. What is the relationship between latitude and species diversity?
E. How is landscape/habitat diversity related to species diversity?
Answers
A. Genetic diversity refers to the variety of genetic information contained within a population of a particular species. Maintaining genetic diversity is crucial for the preservation of a species for several reasons:
Adaptation to changing environments: Genetic diversity increases the likelihood that some individuals within a population will possess traits that enable them to survive and reproduce in changing environmental conditions. This adaptability is crucial for a species to persist over time. B. According to the biological species concept, a species is a group of organisms that can interbreed to produce fertile offspring and are re productively isolated from other groups.C. Species richness refers to the total number of different species present in a given area or community. It measures the diversity in terms of species count. D. The relationship between latitude and species diversity is known as the latitudinal diversity gradient. Generally, species diversity tends to increase as one moves closer to the equator and decreases towards the poles. This pattern is observed across various taxonomic groups and ecosystems.
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How did Robert Hooke contribute to the cell theory
A He was the first to use the term “cell.”
B He was the first scientist to use a microscope.
C He stated that all animals are made up of cells.
D He stated that all cells arise from preexisting cells.
Answers
Robert Hooke contribute to the cell theory because he was the first person to use the term “cell.”
What is contribution of Robert Hooke to cell theory?Hooke observing cork through his microscope in which he saw tiny cavities which he described as cells. Hooke's discovery led to the foundation of cell theory.
So we can conclude that Robert Hooke contribute to the cell theory because he was the first person to use the term “cell.”
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explain the difference between absorption and transmission of light
Answers
Answer:
Absorption is the transformation of radiant power to another type of energy, usually heat, by interaction with matter. The transmittance t of a medium is defined by the ratio of transmitted radiant power to incident radiant power.
Explanation:
Have a nice day! :D
How an mRNA is synthesized using a gene
Answers
The nucleus uses the nucleotide sequence of DNA as a template to make mRNA. The enzyme RNA polymerase II catalyzes this activity, which requires nucleotide triphosphates as substrates. Transcription is the process of producing mRNA from DNA, and it takes place in the nucleus. The DNA of a gene serves as a template for complementary base-pairing during transcription, and an enzyme known as RNA polymerase II catalyzes the synthesis of a pre-mRNA molecule, which is then processed to generate mature mRNA.
If a corn plant has a genotype Sstt, what are the possible genetic combinations that could be present In a single grain of pollen produced by the plant?
A. Ss, tt, St, st
B. s, tt, st, ST
C. st, st
D. st, sT, st
Answers
Answer:
C
Explanation:
2. provides energy to a cell
Answers
Answer:
Mitochondria provides energy to the cell
Read each description below regarding innervation of the ANS. Then click and drag each into the appropriate category base on whether it is an example of antagonic or cooperative innervation
Answers
The question is incomplete. Here is the complete question.
Read each description below regarding the dual innervation of the ANS. Then click and drag each into the appropriate category base on whether it is an example of antagonic or cooperative innervation.
The sympathetic division stimulates mucus production by salivary glands while the parasympathetic division stimulates enzyme secretion.
The sympathetic division stimulates am increase in heart rate while the parasympathetic division stimulates a decrease in heart rate.
During sex, the parasympathetic division stimulates arousal while the sympathetic division stimulates orgasm.
The parasympathetic division constricts the pupils while the sympathetic division dilates the pupils.
Antagonistic:
Cooperative:
Answer: Antagonistic: The sympathetic division stimulates am increase in heart rate while the parasympathetic division stimulates a decrease in heart rate; The parasympathetic division constricts the pupils while the sympathetic division dilates the pupils.
Cooperative: The sympathetic division stimulates mucus production by salivary glands while the parasympathetic division stimulates enzyme secretion.; During sex, the parasympathetic division stimulates arousal while the sympathetic division stimulates orgasm.
Explanation: The peripheral nervous system is divided in Somatic Nervous System (SNS) and Autonomic Nervous System (ANS). The first is responsible for sensory input and voluntary motion.
Autonomic Nervous System is divided into Sympathetic and Parasympathetic divisions and is controls the fight-or-flight and rest-and-digest situations. Usually, an organ with sympathetic and parasympathetic innervations have antagonic function, such as the heart rate - one system causes the heart rate to increase while the other stimulates the rate to decrease. However there are cases in which the combination of the 2 systems cause an increase of stimulation, producing similar effects.
Analysing each category above, it is deductable that when the sympathetic stimulates mucus production and parasympathetic, enzyme secretion and when the parasympathetic stimulates arousal and sympathetic, orgasm, in both cases, they have cooperative innervation.
On the other hand, when sympathetic stimulates increase in heart rate and parasympathetic, decrease in the rate, as stated before, and one stimulates constriction of the pupils and the other, dilation of the them, those are examples of having antagonic innervation.
how are climatic regions classified?
a. sunlight and wind
b. sunlight and precipitation
c. temperature and wind
d. temperature and precipitation
Answers
Answer:
I believe the answer is D
1. How important is the beef industry as compared to the total liv
stock production industry?
Answers
Answer:
The beef and wider meat industry at the processing and further processing levels also contributes enormously. ... The beef industry also contributes significantly to the U.S. balance of trade. The U.S. last year exported a record $6.16 billion worth of beef cuts and variety meats.
Explanation:
They support a extreme amount of the U.S balance of trade and have helped the government in making money.
A student performs an experiment to understand how havinghigh internal salt concentrations impacts marine plants' abilities to maintain homeostasis. The student adds 100 mL of distilled water to two different beakers, X and Y, then adds 3.5 mg of salt to beaker Y and a 5 g piece of seaweed to each beaker. The student observes the seaweed after it remains undisturbed for six hours.
Beaker - Observation
X - Sewead plant swells
Y - Seaweed plant remains the same.
What can be inferred from the observations of the experiment?
O The high internal salt concentration prevents the plants from losing salts by osmosis.
O The high internal salt concentration prevents the plants from losing water by osmosis.
O The high internal salt concentration prevents the entry of water into the plants by facilitated diffusion.
O The high internal salt concentration prevents the entry of salts into the plants by facilitated diffusion.
Answers
The high internal salt concentration prevents the plants from losing water by osmosis. Thus, the correct option is B.
What is Osmosis?Osmosis can be defined as the spontaneous net movement or diffusion of solvent molecules through a selectively-permeable membrane such as plasma membrane from a region of high water potential to a region of low water potential, in the direction which tends to equalize the solute concentrations on the two sides.
Osmosis helps in achieving the state of equilibrium. In the given experiment, the high internal salt concentration prevents the plants from losing water through the process of osmosis.
Therefore, the correct option is B.
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please help me ....
Answers
Answer:
c goooooooood luck have a nice day
Answer:
its b
Explanation:
C c'b
c'b C c'b c'b c'b
c Cc c'b c
a punnet square to explain
Could someone pls help with my bio homework?
What are the by-products of the three energy systems (Anaerobic Alactic
Anaerobic Lactic, Aerobic Energy System) ?
Answers
The alactic anaerobic system, also known as the phosphagen system or ATP-CP system, represents an immediate source of energy for active muscle.
What are the by-products of the three energy systems?
Anaerobic alactic, energetic substrate used: phosphate-creatine;Anaerobic lactic acid, energetic substrate used: glucose; 3- Oxidative System (Mitochondria) Anaerobic Glycolysis System (Cytosol) Aerobic, energetic substrates used: glucose, fatty acids.
With this information, we can conclude that the alactic anaerobic system, also known as the phosphagen system or ATP-CP system, represents an immediate source of energy for active muscle.
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what neurotransmitter is involved in the mesolimbic reward pathway?
Answers
Explanation:
dopamine is the neurotransmitter
how is silk thread obtained
from the silkworm
Answers
Answer:
Extracting raw silk starts by cultivating the silkworms on mulberry leaves. Once the worms start pupating in their cocoons, these are dissolved in boiling water in order for individual long fibres to be extracted and fed into the spinning reel.
Explanation:
It's pretty cool to watch if you have the chance to.
What reaction occurs in the stroma of the chloroplast?
Group of answer choices
Krebs Cycle
Light Independent Reactions
Light Dependent Reactions
Glycolysis
Answers
Answer:
Light Independent Reactions
Explanation:
The stroma is the fluid-filled space of chloroplasts the thylakoids. It contains all the enzymes required for light-independent reactions of photosynthesis and is, therefore, the site of the Calvin cycle.
The Krebs cycle and glycolysis are stages of cellular respiration and occur in the mitochondria.
The light-dependent reactions occur in the thylakoids
Does silver or aluminum have a higher resistance?
explain, please put it into your own words
Answers
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The higher the % IACS, the more conductive the material is. This standard refers to a pure, "standard" copper having a resistivity of 1.7241 microhm-cm at 20°C (68°F).