Darwin observed that the vegetation and wildlife on the various islands varied as well. As an illustration, the sea turtles on one beach had shells that were saddle-shaped, whereas those on some other island had shells.
What are some illustrations of the theory of evolution by Darwin?The tortoises, for instance, varied slightly between each island. According to Darwin, the vice governor of the colony "could at once detect out of which island any individual had brought" by glancing at a turtle's shell.
What distinguishes pinzn tortoises from Duncan tortoises?Pinzn Islands (formerly Duncan Island) tortoises are "saddle-backed," which refers to the way their shells raise in the front like a saddle. They can more easily elevate their necks to feed on taller cacti because to this modification. Tortoises originating in Santa Cruz.
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what happens to the free energy that is released as electrons are passed from photosystem-ii through a series of electron carriers?
The free energy that is released as electrons are passed from photosystem-ii through a series of electron carriers is used to establish and maintain a proton gradient.
When there are enough protons, the proton gradient controls the forming of ATP. So a gradient allows cells to save protons as "loose change," which makes all the difference — the distinction among growth and no growth, life and no life.
A proton gradient is formed between the intermembranous storage and the inner mitochondrial membrane by the Krebs cycle. The energy required to move the proton through the ATP synthase is provided by this proton gradient. Without a proton gradient, protons will not circulate through ATP synthase, and thus no ATP will be produced.
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What receives stimuli from receptor sites in the sensory organs and transmits them to the brain and spinal cord?
Option c is Correct. The afferent neuron sends stimuli to the brain and spinal cord from receptor sites on the sensory organs.
What functions do afferent neurons perform?
The nerve fibers that carry sensory data from the outside environment into the brain are known as afferent neurons, also referred to as sensory neurons. Special senses like vision, hearing, smell, or taste, as well as the senses of touch, pain, and temperature, can all play a role in sensory information. Afferent neurons are frequently connected to specialized sensory receptors that are divided into groups based on the stimuli to which they respond.
The sensory afferent neurons transmit information about an external stimulus that is detected by the sensory receptors (such as touching a hot pan) up the spinal cord to the brain, where association neurons will determine how to respond. The motor efferent neurons will then interact with those association neurons to deliver information down the spinal cord and out to the muscles, instructing them on what action to make (e.g., pulling away from the hot pan).
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Correct Question:
What receives stimuli from receptor sites in the sensory organs and transmits them to the brain and spinal cord?
a. Efferent neuron
b. Associative neuron
c. Afferent neuron
d. Glial cell
When a population colonizes a new area, growth is initially slow. This phenomenon is called?
Carrying capacity
Lag Phase
exponential growth
stationary phase
When a population colonizes a new area, growth is initially slow, and this phenomenon is called the "lag phase," which is present in the second option.
What is the growth curve and its importance?The growth curve indicates the growth of the individual in the ecosystem, and generally there are four phases, such as the lag phase, which is a slow growth phase, and it shows the slow growth as an organism newly starts to grow, and then the exponential growth is seen as there is enough food and space available, and then after reaching the carrying capacity, the growth slows down.
Hence, when a population colonizes a new area, growth is initially slow, and this phenomenon is called the "lag phase," which is present in the second option..
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in a protein region that forms an alpha helix, what does the main chain carbonyl oxyggen hydrogern bond with
In alpha helix structure of protein, carbonyl group oxygen bonded with amine hydrogen as a hydrogen bond. The alpha helix (-helix) is a right-hand helix shape wherein every backbone NH group hydrogen bonds to the backbone C=O. group of the amino acid four positions ahead in the protein.
Alpha () amino acids are a protein's main building block. As their name suggests, they have both an amine functional group and a carboxylic acid functional group. These two functional groups are separated from one another by one carbon group, as indicated by the alpha designation. The alpha carbon is also joined to a hydrogen and a third group, which can be any size or length, in addition to the amine and carboxylic acid. This group is shown as an R-group in the diagram below. Twenty amino acids are employed as the building blocks for proteins in living things. Only at the R-group position do they diverge from one another.The fundamental structure of a protein is only the arrangement of the amino acids in a polypeptide chain. For instance, the polypeptide chains A and B of the hormone insulin.
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you are a researcher studying nutria in the wild. for best success, when should you look for them?
Nutria is known to live in warmer, often wetter environments, including such coastal marshes or wetlands inside the lower latitudes.
Nutria were first introduced to the United States for the fur trade in 1899, but they did not reproduce. Subsequent introductions have been successful, as records show nutria were present in California's Central Valley but also South Coast in the 1940s and 1950s, but had been eradicated by the 1970s.
The nutria is indeed a large, furry, aquatic rodent with a light to dark brown coat. Nutria are closely related to beavers, but have arched backs but also long, round, sparsely haired tails, instead of wide as well as flattened beavers. Adults have a body size of two feet, a weight of 15-20 pounds, and a tail length of 1-1.5 feet. Nutria tracks can grow up to 6 inches long, due to having 5 toes per foot, and also have visible webbing on the hindfeet.
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what is the correct sequence of events in viral reproduction? a.penetration, attachment, integration, biosynthesis, maturation, release b.endocytosis, uncoating, maturation, and release c.attachment, fusion, biosynthesis, maturation, and release d.attachment, penetration, biosynthesis, maturation and release
Answer:
d. attachment,penetration, biosynthesis, maturation and release
what occurs when a species enters a new environment and different traits affect its survival and evolution?
When a species enters a new environment, a variety of different traits can affect its survival and evolution. If the species is foreign to the environment, the species must adapt to the new climate, terrain, food sources, and predators in order to survive.
The introduction of a species into a new environment is known as ‘range expansion’ and can have both positive and negative impacts on the species’ survival and evolution.The most important factor in a species’ survival and evolution in a new environment is its ability to adapt. A species must be able to quickly adjust its behavior, physiology, and genetics to the new environment in order to survive.
The species may need to develop new behaviors, such as mating strategies, or physiological changes, such as the ability to tolerate a wider range of temperatures. The species must also evolve genetically in order to survive, developing new traits that are better suited for the environment.
Different traits can have a large influence on a species’ survival and evolution in a new environment. A species’ body size, for example, can have a big impact on its ability to survive. In a new environment, a species with a larger body size may be more successful, as it can outcompete smaller species for resources.
A species’ reproductive strategy can also have an effect on its survival and evolution. Species that reproduce quickly and produce large numbers of offspring are more likely to survive in a new environment, as they can quickly adapt to new conditions.
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which of these mutations will have an effect on the protein produced by the gene in which the mutation occurs? select all that apply.
a. Point Mutation
b. Missense—A change in a single nucleotide that results in a changed codon that codes for a different amino acid.
c. Insertion—Anywhere from one to several nucleotides are inserted into the sequence of a gene
d. Deletion—Anywhere from one to several nucleotides are removed from the sequence of a gene.e. none abovef. all correct
Missense—A change in a single nucleotide that results in a changed codon that codes for a different amino acid, will have an effect on the protein produced by the gene in which the mutation occurs.
A genetic change in which the genetic code is changed by a single base pair substitution, resulting in the production of an amino acid that differs from the typical amino acid at that site. Some missense variants (or mutations) change how a protein functions. referred to as a missense variant.
A missense mutation happens when a mistake in the DNA coding causes a change in one of the DNA base pairs, such as when A is substituted for C.
This one modification, known as a substitution, causes the DNA to now encode for a new amino acid. Sometimes, altering an amino acid has no impact whatsoever on how the resulting protein functions. A change in amino acid can sometimes improve a protein's ability to perform its function, but it can also make the protein appear to be "faulty" in other situations.
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Which of the following statements about fossils is NOT true?
A. Fossils are clues to how Earth has been changing over millions of years.
B. Fossil records indicate the existence of transitional species.
C. The fossil record is now complete.
D. Fossils could be bones or imprints of ancient organisms preserved in rock.
Answer:
C. The fossil record is now complete
High pitched sounds produce a peak displacement of the basilar membrane near the apex of the cochlea. True or False.
False
Because low frequencies generate maximum displacement towards the apical end of the cochlea, while high frequencies cause maximal displacement close to the base of the cochlea (near the stapes).
How does the basilar membrane's mobility depend on the frequency of sound waves?The distance that sound waves travel decreases with increasing frequency. As a result, a tone at a certain frequency causes stimulation to peak at a particular location on the basilar membrane.
Where in the cochlear duct do frequencies ranging from high to low pitches activate the hair cells?With respect to the cochlea's base and apex, high frequencies and low frequencies respectively activate hair cells.
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The phenotype of offspring would most likely be influenced by mutations during which biological process within the parent?
Answer:
Mitosis
Explanation:
Since all the cells in the offspring begin with the two parental gametes, every cell in the body of the offspring will contain the mutation. When a mutation occurs during mitosis, the organism in which the mutation occurs is affected.
Students are studying the causes of decrease in a population of tiny organisms that live in aquatic environments and make their own food from sunlight in a certain aquatic ecosystem. What is the name given to these organisms?
A)
phytoplankton
B)
algae
C)
fungi
D)
oceanic organisms
E)
fish
Please select the best answer from the choices provided
A
B
C
D
E
flying squirrels (same species) competing with each other for truffles is an example of ________.
Flying squirrels (same species) competing with each other for truffles is an example of intraspecific competition.
When individuals from the same species have an impact on the growth as well as reproduction of other members of the same species by sharing limited resources. The scramble competition. When competition depletes a resource with an equal impact on all members of a species.
Intraspecific competition seems to be competition between members of the same species, such as emperor penguins competing for nesting grounds. Interspecific competition occurs when two or more species compete for the same carcass, such as vultures and wild dogs. Natural systems have a tendency to progress toward greater disorder but rather randomness. Entropy is a measure of a system's degree of randomness as well as disorder.
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Bacteria that cause periodontal disease have adhesins for receptors on streptococci that colonize on teeth. This indicates that ______.
a. streptococci get bacterial infections
b. streptococcal colonization is necessary for periodontal disease
c. bacteria that cause periodontal disease adhere to gums and teeth
d. bacteria that cause periodontal disease adhere to teeth
e. streptococci cause periodontal disease
Answer:
bacteria that cause periodontal disease adhere to teeth.
Explanation:
FILL IN THE BLANK. dna replication results in __________ copies of a cell's genome.
DNA replication results in the formation of 2 identical copies of a cell's genome.
Replication is the process of making identical copies of the DNA. It occurs in the nucleus of the eukaryotic organism and in the nucleoid of the prokaryotes. The most essential enzyme required for replication is DNA polymerase. Each strand of DNA acts as a template for replication to occur.
Genome refers to the complete genetic material of an organism. Each cell of an organism's body is composed of the entire genome in its nucleus. The genome is composed of the entire double-stranded DNA composed of various multiple genes.
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what kind of activity uses cas9 to cleave target dna? a. hydrolase b. nuclease c. ligase d. transferase
The kind of activity that uses cas9 to cleave target dna is (b) nuclease.
With the use of the straightforward-yet-effective CRISPR/Cas9 genome editing technique, researchers may precisely delete, reorder, add, or modify nucleotides, among other genomic or epigenomic alterations in cells. With the help of these technologies, it is now possible to create animal models for lung disorders and study the consequences of mutations in lung cells made from human iPSCs. Teams are experimenting with the technique to modify disease mutations in iPSCs obtained from patients, differentiate them into different lung cell types, then engraft these cells into the original patient. In a related work, lung cells in animal models were successfully edited using CRISPR technology in utero, paving the way for in vivo editing of disease mutations.
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why are single-nucleotide polymorphisms (snps), which have been associated with schizophrenia and bipolar disorder, currently not used to diagnose either of these disorders?
Genetics. Schizophrenia runs in families, although no single gene is known to be to blame. It's more likely that distinct gene combinations render people more susceptible to the illness.
Only a few genes have been proven to be associated to schizophrenia. A mutation in the SETD1A gene clearly increases the risk of the disease. Other genetic variants linked to schizophrenia have minor impacts, whereas a single mutant copy of SETD1A is linked to a significant increase in disease risk.
Deletions or duplications of genetic material in any of several chromosomes, which might influence several genes, are also likely to raise schizophrenia risk. A minor loss (microdeletion) in a region of chromosome 22 known as 22q11 may be involved in a small percentage of cases.
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Mike thinks that the seasons are caused by Earth moving around the Sun.
What is Mike doing?
O A. Drawing a conclusion
OB. Forming a hypothesis
OC. Proving a trend
OD. Making an inference
SUBM
B. Forming a hypothesis
Mike is forming a hypothesis that the seasons are caused by Earth moving around the Sun. A hypothesis is an educated guess or prediction about something, based on available evidence. In this case, Mike is making a prediction about the cause of the seasons, but he has not yet tested or confirmed his hypothesis.
Koala are a specialist species because they _______.
a. only eat eucalyptus leaves
b. are marsupials
c. live in trees
d. eat leaves
a. only eat eucalyptus leaves.
Koala are a specialist species because they a. only eat eucalyptus leaves.
What is a specialist species?A species that fills highly specific niches in its environment can survive and procreate.
The conditions in which specialists live allow them to adapt quite well, but they are unable to do so in other environments.
Animals that need particularly specific resources are known as specialist species. These animals frequently have a relatively restricted diet or require a certain habitat condition to exist. The tiger salamander is an example of a specialist.
They need to reside in wetland habitats that don't dry out in the spring and summer in order to be able to breed. They also need a lot of worms and insects for their food.
Koalas are a specialised species since they only consume eucalyptus leaves.
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Answer:
A. only eat eucalyptus leaves
Incomplete dominance is a____inheritance pattern. it states that neither trait is____. the traits appear to blend together.
Non-Mendelian, dominant/recessive.
Incomplete dominance is a Non-Mendelian inheritance pattern. it states that neither trait is dominant/recessive. the traits appear to blend together.
Incomplete Dominance:
When both alleles of a gene are only partially expressed at a locus, it is known as incomplete dominance. This sort of gene interaction frequently produces an intermediate or distinct phenotype. Additionally called partial dominance.
For instance, the gene for the colour red predominates over the allele for the colour white in roses. However, the heterozygous blooms that carry both alleles are pink.
Because neither of the two alleles is totally dominant over the other, incomplete dominance results. This leads to a phenotype that combines both of them.
In the case of incomplete dominance, the ratio of red, white, and spotted flowers in the F2 generation from heterozygous plants will be 1:2:1.
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Answer:
Incomplete dominance is a
✔ non-Mendelian
inheritance pattern. It states that neither trait is
✔ dominant
. The traits appear to blend together.
Explanation:
edge
4. Dragons can be Yellow, Red, or Orange.
Show the letters that match the phenotype. USE R and Y
5. Show the cross between a Red dragon and an Orange Dragon.
What percentage of the offspring are red?
Answer:
Red RR
Orange RY
Yellow YY
percentage of Red := 50%
Explanation:
note that this is related with Codominance.
therefore RY gives out an Orange dragon.
to find the cross between a Red and an orange we can use punnet square:
it will give RR, RR, RY, RY
so, 2/4 are Red. that means it is 50%
The picture of the question is below
According to the picture, the conclusion that statins reduce the risk of cardiovascular heart attacks is not definitive because we need to have statistically significant data results in order to reach such conclusion.
What are statistically significant data results?Statistically, significant data results can be defined as any type of data based on statistics that can only be obtained by using an N sample that is big enough to reach some type of conclusion regarding experimental data.
According to the picture, we can not be conclusive about data because we need to calculate the statistically significant parameters such as the p-value in order to determine if the data adjusts to the working hypothesis (in this case statins reduce the risk of cardiovascular heart attacks).
Therefore, with this data, we can see that statistically significant data results are fundamental to reaching any type of conclusion after experimental research.
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Which of the following is not true fossil
a. compression
b. Amber
c. pseudofossil
d. microfossil
Answer:
microfossil
Explanation:
because it is not
why do you think it is important for a reaer to seperate the facts from the opinions when reading an autobiogrphy
It is important to distinguish between fact and opinion because a fact is a truth based on evidence, while an opinion is a view that is not based on checkable evidence.
A fact is a reality supported by evidence, whereas an opinion is a belief that is not supported by verifiable data, hence it is crucial to distinguish between the two. People form their own opinions about a subject using facts. Opinions may be biased and evaluated according to who is expressing them. When reporting a story, journalists frequently employ a combination of facts and people's opinions. The facts can be used by readers to learn more about the story, and the opinions can help them establish their own conclusions. When making purchases, customers also combine facts and opinions. For instance, if a person is looking for a vegetarian restaurant, they will need to know if the establishment is vegetarian. However, they may also utilize user evaluations to choose whether to make a reservation.
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FILL IN THE BLANK. in his work with pneumonia-causing bacteria and mice, griffith found that __________.
In his work with pneumonia-causing bacteria and mice, Griffith discovered that some substance from pathogenic cells was transferred to nonpathogenic cells, resulting in their pathogenicity.
Bacteria are the microorganisms that are present everywhere on the Earth. These are the living organisms that occurs in various shapes and strains. Bacteria can be good ones as well as bad ones. The good bacteria help in food digestion, nitrogen fixation, etc. And the bad ones cause infection or severe diseases.
Pathogenic refers to the capability of causing disease. If an organism is pathogenic, it depicts that it can cause disease. Bacteria, virus, protozoans can be pathogenic in nature.
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At an archeological site, you discover a bone that is cylindrical in shape, about one inch long and a quarter of an inch wide. Choose the correct classification.
a. Short
b. Irregular
c. Long
d. Sesamoid
At an archeological site, you discover a bone that is cylindrical in shape, An a quarter of an inch wide is classified as Option c) long.
Archaeology is the study of the past of humanity via tangible artefacts. Any item that people developed, altered, or utilised can be considered one of these remains.
Typically, artefacts are portable remains. Tools, apparel, and ornaments are examples of artefacts. Features are immobile remains, such as postholes or pyramids.
Archaeologists study artefacts and landscape elements to understand how humans lived in particular eras and locations. They are interested in how these people lived their daily lives, how they were governed, how they interacted with one another, and what their beliefs and values were.
Sometimes, the only indicators of an ancient culture or civilisation are artefacts and traits. We cannot read about prehistoric civilizations since no written records of them have survived.
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what is the purpose of protonephridia in flatworms? to serve as a structure for sexual reproduction to regulate fluid balance
the purpose of protonephridia in flatworms is To regulate fluid balance
Protonephridia are groups of flame cells. A flame cell is a type of excretory cell observed in relatively simple freshwater invertebrates, such as flatworms, rotifers, and nemerteans; these are the only animals with a dedicated excretory system. Flame cells operate like a kidney, expelling waste materials.
Flatworm, also known as platyhelminth, any member of the phylum Platyhelminthes are a bunch of soft-bodied, flattened invertebrates.
The role of the protonephridia is the same as that of most excretory organs: after ultra filtration, substances from the lumen are reabsorbed in a more or less selective manner. The large surface area of the channel cell aids in reabsorption.
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Complete question :
What is the purpose of protonephridia in flatworms?
To exchange gas
To serve as a structure for sexual reproduction
To sense prey
To respond to stimuli
To regulate fluid balance
Are these the correct answers? I am unsure if I got this right, but I would appreciate the help if I got anything right or wrong.
The correct order of translation going by the illustration would be 2, 1, 3, 4, 5, 7, and 6.
What is translation?The translation is a process of gene expression during which the genetic codes in an mRNA chain are translated to their respective amino acids which are then linked by peptide bonds to form proteins.
The first step in the translation process is the binding of mRNA to the ribosome. The rRNA then reads the start codon on the mRNA to signal the beginning of the translation process.
Another RNA, the tRNA carrying anticodons then begins to match up with the complimentary codons on the mRNA, releasing the respective amino acid for each codon in the process.
The ribosome creates a bond between successive amino acids while the chain of amino acids continues to grow until the stop codon is reached. Thereafter, the amino acid chain is folded into protein.
Thus, the correct order of the process is 2, 1, 3, 4, 5, 7, and 6.
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Picture of the question is below
The area of the lumen that will be available for the flow of blood would be 6.908 [tex]mm^2[/tex].
Are of a lumenThe area of the lumen is given by:
π[tex]r^2[/tex]
The diameter of a surface is usually the radius multiplied by 2. Thus with 4.0 mm diameter, the radius can be calculated as:
4.0/2 = 2 mm
Using this to calculated the area of the lumen:
Area of lumen = 3.14 x 2 x 2
= 12.56 [tex]mm^2[/tex]
In other words, the area of the lumen when it is completely free is 12.56 [tex]mm^2[/tex]. However, 45% of this area has been blocked by the deposition of cholesterol.
45/100 x 12.56 = 5.652 [tex]mm^2[/tex]
The area of the lumen that is available for blood flow would then be:
12.56 - 5.652 = 6.908 [tex]mm^2[/tex]
In other words, the area of the lumen that would be available for blood flow is 6.908 [tex]mm^2[/tex].
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To examine meiosis in ferns, you would study __________.
A
the antheridia
B
the archegonia
C
both the antheridia and the archegonia
D
both the archegonia and the sporangia
E
the sporangia
Option -E: To examine meiosis in ferns, you would study the sporangia. A sporangium is a structure in certain plants and other organisms that is charged with making and storing spores.
Spore mother cells divide within the sporangia to produce spores. The spores are produced by a type of cell division known as meiosis. A single diploid parent cell divides to produce four haploid daughter cells during meiosis. Meiosis is a type of cell division that occurs in sexually reproducing organisms and results in a reduction in the number of chromosomes in gametes.
Meiosis, also known as "reduction division," reduces the number of chromosomes to half the normal number so that when sperm and egg fuse, the baby has the correct number.
Meiosis occurs in primordial germ cells, which are distinct from the body's normal somatic cells and are designed for sexual reproduction. A germ cell goes through interphase, which is when the entire cell replicates in preparation for meiosis.
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