Lamarck's theory of acquired characteristics suggests that useful traits, such as increased neck length in giraffes from stretching, could be passed to offspring. This contrasts with natural selection, which favors individuals with advantageous traits that are naturally present, not acquired.
Explanation:Lamarck's Theory of Acquired Characteristics
Jean-Baptiste Lamarck's theory of acquired characteristics suggests that traits developed during an organism's lifetime could be passed on to its offspring. In the context of giraffes, Lamarck hypothesized that their neck length increased because individuals stretched to reach leaves on taller trees, and these longer necks were then inherited by the next generation. His theory implies a purposeful evolution based on the use and disuse of characteristics, where traits that are beneficial for survival become more pronounced over generations, while those of less value diminish.
However, subsequent research and observations, such as those by Scientist B and Charles Darwin, have discredited Lamarck's ideas in favor of natural selection. Scientist B's experiments demonstrated that muscle stretching does not alter bone length or DNA in a way that would be heritable. Alternatively, Darwin's theory of evolution by natural selection posits that creatures with advantageous traits, like giraffes with naturally longer necks, are more likely to survive, reproduce, and pass on their advantageous traits without the need for the traits to be acquired during their lifetime.
According to the cdc, tooth decay affects more than ________ of u.s. children aged 2 to 5.
According to the CDC, tooth decay affects more than one-fourth of U.S. children aged 2 to 5.Tooth decay is the damage of the structure of the tooth which is caused by acids that are produced when sugar is being broken down by plaque bacteria in the mouth. Tooth decay is the primary cause of tooth loss in children in the United States.
The parents-to-be were shocked when an ultrasound scan done in the second trimester of the pregnancy showed a fetus with obviously broken leg bones and ribs. the doctor diagnosed osteogenesis imperfecta. this is caused by the mutation in a gene that encodes
What disorder is caused by hypersecretion of cortisol from the adrenal cortex?
What is the structure that is needed to process a menu selection?
Which type of plant is a fern
Which is the correct representation of energy flow through an ecosystem?
The correct representation of energy flow through an ecosystem is: Sun - autotrophs - heterotrophs.
What is a pyramid of energy?A pyramid of energy can be defined as a graphical model that is used to depict the flow of energy from one trophic level (feeding level) to the next in an ecosystem.
This ultimately implies that, a pyramid of energy is a diagram that compares the energy that is used by living organisms at each trophic level of the food chain in an ecosystem.
In conclusion, the correct representation of energy flow through an ecosystem is:
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which tissue
is affected by polio?
Common name for the pollex is the
An elderly woman in a nursing home no longer goes outside to enjoy the sunshine and fresh air, has reduced her meat intake because her dentures don't fit well, and has recently been having difficulty concentrating on conversations with others. this may be leading to a deficiency of which vitamins? vitamin d and vitamin b12 vitamin a and folate vitamin c and thiamin vitamin k and riboflavin
Answer: Vitamin D and vitamin B12
Explanation:
Vitamin D is very important for the body as it helps in the calcium absorption by the body. The body should be in regular exposure with sun.
Vitamin B12 is mostly found in meats and non vegetarian foods. Not taking meat because of any reason will affect the brain and body.
Due to the deficiency of vitamin B12 and Vitamin D, elderly women is having difficulty in concentrating on conversations.
The layer of the uterus that is shed during menstruation is the
The layer of the uterus that is shed during menstruation is the endometrium.
The menstrual cycle causes hormonal changes in the endometrium, the uterus' innermost lining. If pregnancy fails, the endometrium sheds during menstruation, causing bleeding.
Menstruating women shed their endometrial lining every 28 days. After menstruation, the endometrium thickens again to prepare for egg implantation. Fertilisation and implantation implant the embryo in the endometrium.
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Why do eukaryotic cells undergo mitosis?
"which aspect of language is most frequently impaired after traumatic brain injury"
adaptive immunity is based upon ________.
Adaptive immune system is based on immunological memory.
Explanation:This system is a specialized sub system of immune system that can eliminate pathogens and prevent their growth in the body.
After its first encounter with the pathogen, it creates an immunological memory that can last up to lifetime and it is highly specific. The memory of the first encounter leads to enhanced response in future with the particular pathogen.
For example, a person who gets affected from measles gets a lifetime protection from the pathogen.
How does the pathogen proliferate within the human host?
You are a biologist on a trip to an island in the south pacific. while on the island, you are allowed to collect dna samples from a local species of rat that resembles a species seen on a nearby continent. if your dna analysis also indicates the two species are closely related, you might conclude that the evolution of the two separate species was an example of _____ speciation through _____.
In corn plants, plant height is controlled by one gene with two alleles how many alleles that control the trait for height are present in each cell nucleusof a corn plant
according to the second law of thermodynamics, which is a requirement for the thermal energy to flow from colder objects to hotter objects?
Answer: work must be done on the system
Explanation:
The second law of thermodynamics is the fundamental law of nature; it states that energy can be transferred from cold objects to hot objects only, if work is done on the system. If energy is added to the system then as a result the thermal energy would increase. Second law of thermodynamics is used to determine whether a process is spontaneous or not.
How might optimization be expressed in older adults' sexual activity?
Optimization refers to the activity of making the most or best efficient use of a resource of situation. Optimization suggests that it is probable to sustain performance in some areas via spontaneous practice and the application of new technology.
The older adults get involved in numerous sexual activities, companionship is essential to age individuals. The optimization in older adults’ sexual activity can be expressed by getting involved in more kissing, cuddling, and fantasizing in comparison to intercourse for satisfying the sexual activity.
When your body digests alcohol, your stomach digests_____% of it?
Answer: 20%
The alcohol that is swallowed by a person avoids the normal digestive process. It travels down the esophagus into the stomach and the small intestine and goes right into the bloodstream. About 20 percent of the alcohol consumed by the body is absorbed in the stomach, and about 80 percent is absorbed in the small intestine. The liver is the organ that is particularly affected by alcohol because it is the main organ that processes alcohol.
What category of classification is used for the first term in a scientific name?
Which bones make up the elbow joint?
a. humerus, radius, and ulna b. scapula, humerus, and radius c. radius, ulna, and carpal bones d. humerus and scapula?
Transplanting genetic material into bacteria is a simple task true or false
Transplanting genetic material into bacteria is not a simple task; it is a complex process involving genetic transformation, genetic transfer, and bacterial conjugation. While competent bacteria can take up new DNA, creating transgenic organisms or introducing synthetic genomes into bacteria is more challenging and less straightforward.
Is Transplanting Genetic Material into Bacteria a Simple Task?
Transplanting genetic material into bacteria can be a complex process, as it involves several steps that need to be carried out with precision. Genetic transformation, genetic transfer, and bacterial conjugation are means by which bacteria can receive new genetic information. The introduction of recombinant DNA into a bacterium is facilitated through different mechanisms, such as natural competency, transformation, transduction, and conjugation using structures like the F pilus or sex pilus. As mentioned in LibreTexts, competent bacteria are able to take up DNA from their environment, and other methods may involve using plasmids or direct injection. Genetic engineering often takes advantage of these processes to introduce new genes into bacteria for the production of proteins or to create transgenic crops.
However, in the context of synthetic biology, the (booting) of a completely synthetic genome into a bacterial host presents a greater challenge and is currently a more complex and expensive process. Thus, the statement that transplanting genetic material into bacteria is a simple task is generally considered false.
Quitzzthe endosymbiotic theory proposes that mitochondria in eukaryotic cells arose from question 5 options: endosymbiotic eukaryotes that were photosynthetic. endosymbiotic eukaryotes that metabolized oxygen. endosymbiotic prokaryotes that metabolized oxygen. endosymbiotic prokaryotes that were photosynthetic.
What determines which base is to be added to an rna strand during transcription?
The base pairing between a DNA strand and RNA nucleotide determines base added to an RNA strand
During Transcription an RNA copy is made from a gene sequence which called an mRNA molecule. and it leaves the nucleus into the cytoplasm of the cell.
The Base to be added to an RNA strand is basically determined by the base pairing between a DNA strand and RNA nucleotide.
Hence we can conclude that what determines the base added to an RNA strand is The base pairing between a DNA strand and RNA nucleotide.
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What are some possible things that you as a disease outbreak expert can do to help?
what happens to the ovule after it is fertilized
What is luca cavalli-sforza's hypothesis for why skin color change came late?
Luca Cavalli-Sforza is a geneticist who hypothesized that the skin-color change came late because previous people had complete vitamin D access to the foods that they are eating. But the moment they started farming, the main vitamin sources are reduced, making a larger gain of having light skin.
Luca Cavalli-Sforza's hypothesis suggests that the change in skin color came later in European populations due to adaptation to reduced ultraviolet radiation exposure.
Explanation:Luca Cavalli-Sforza's hypothesis for why skin color change came late is related to adaptation to changing levels of ultraviolet radiation. As humans migrated from Africa to areas with less exposure to UV radiation, their skin pigmentation became lighter in order to compensate for the reduced absorption of Vitamin D, which is necessary for bone health and immune function. Cavalli-Sforza's hypothesis suggests that this adaptation occurred later in European populations compared to those in other regions.
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The only taxon in which the biological characteristics are clearly identifiable is the
Tasha went on a trekking exposition to a mountain range during her vacation when she reached a particular height it started taking heavily which sphere is responsible for this sudden weather change
Answer:
1. atmosphere
2. troposphere
Explanation:
1. Weather on Earth is caused by heat from the sun and movement of the air. All weather happens in the lower layer of Earth's atmosphere, which is a layer of gases surrounding Earth. The sun's heat warms the air in this layer to different temperature levels in different places. ... This movement of air is what we call wind.
2. The troposphere is the lowermost layer of the Earth's atmosphere. Most of the weather phenomena, systems, convection, turbulence and clouds occur in this layer
What causes the frequent migration of animals in africa?
Answer:CHANGES TO NATURAL RESOURCES
Explanation:
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