Characters that are similar because of descent from a common ancestor are _____; characters that are similar due to convergent evolution are _____. a. homologous; analogous b. analogous; homologous
Answers
Characters that are similar because of descent from a common ancestor are homologous; characters that are similar due to convergent evolution are analogous.
So, the correct answer is a. homologous; analogous.
In biology, homology refers to the similarity between different organisms or structures that is due to their shared evolutionary ancestry. Homologous structures have similar features or functions because they are descended from a common ancestor that possessed those traits. These structures may have different forms or functions in different organisms, but they share a common underlying structure or pattern that can be traced back to a common ancestor.
Homology can also be used to describe similarities between genes or proteins that have evolved from a common ancestral gene or protein. In this case, homologous genes or proteins share a similar structure or sequence and may perform similar functions in different organisms.
In biology, analogy refers to the similarity between different organisms or structures that is not due to shared evolutionary ancestry, but rather due to convergent evolution. Analogous structures have similar features or functions because they have evolved independently in different organisms to perform similar tasks or live in similar environments.
Analogous structures can be a result of different organisms facing similar selective pressures and adapting similar solutions to survive, even though their evolutionary histories are different. Unlike homologous structures, which indicate a shared ancestry, analogous structures do not provide evidence of a shared evolutionary history between organisms.
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Related Questions
1 point
What is the difference between reproduction and heredity?
Reproduction is the process of passing on traits, whereas heredity is the process of
producing offspring
Reproduction is the process of producing offspring, whereas heredity is the process
of passing on traits.
Reproduction always involves changes in inherited characteristics, whereas heredity
does not
Heredity always involves changes in inherited characteristics, whereas reproduction
does not
Answers
Answer:
Reproduction is the process of producing offspring, whereas heredity is the process
of passing on traits.
Explanation:
PLEASE MARK BRAINLIEST, if you think this is correct and best! Thanks!
Reproduction generally means making copy of something, like giving birth/breeding, duplicating.
Heredity is inheritance of traits/ passing on traits from parents t thsir child/children through genes. It makes children have same traits as their parents and looks so what same like their parents!
They definitely aren’t same!
Reproduction is the process of producing offspring, whereas heredity is the process of passing on traits.
What do you mean by heredity?Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information.
Heredity explains why offspring resemble, but are not identical to, their parents and is a unifying biological principle. Heredity refers to specific mechanisms by which characteristics or traits are passed from one generation to the next via genes.
Heredity can be defined as the transfer of genetic characters from parents to offsprings by the process of fertilization, where the nuclei of male and female gamete fuses with each other and forms the genetic material of the zygote.
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Which measurements are equal to 671 decimeters? Check all that apply.
67,100 millimeters
0.671 kilometers
67.1 hectometers
6.71 decameters
6,710 centimeters
Answers
Answer:
67100 millimeters, 6.71 decameters and 6,710 centimeters measurements are equal to 671 decimeters
Explanation:
You can use conversion:
Use conversion:
1 millimeters = 0.01 decimeter
1 kilometer = 10000 decimeter
1 hectometers = 1000 decimeter.
1 decameter = 100 decimeters
1 centimeters = 0.1 decimeter
As per the statement:
To find which measurements are equal to 671 decimeters:
A.
67100 millimeters
Using conversion:
1 millimeters = 0.01 decimeter
then,
67100 millimeters = 671 decimeter.
B.
0.671 kilometers
Using conversion:
1 kilometer = 10000 decimeter
then,
0.671 kilometers = 6710 decimeter.
C.
67.1 hectometers
1 hectometers = 1000 decimeter.
then,
67.1 hectometers = 67100 decimeters.
D.
6.71 decameters
1 decameter = 100 decimeters
then,
6.71 decameters = 671 decimeters
E.
6,710 centimeters
1 centimeters = 0.1 decimeter
then,
6710 centimeters = 671 decimeters.
But only A, D, and E are correct
{{c1::DNA methylation of cyteine nucleotides}} causes DNA to wrap more tightly around histones
Answers
DNA methylation is a process in which a methyl group is added to the cytosine nucleotides of DNA. This modification often occurs in regions called CpG islands, which are rich in cytosine and guanine nucleotides.
Methylation of cytosine can cause the DNA to wrap more tightly around the histones, making it less accessible to transcription factors and other proteins that need to bind to the DNA in order to regulate gene expression. This can have important consequences for the cell, as changes in DNA methylation patterns can alter the expression of genes and contribute to the development of diseases such as cancer.
When cytosine is methylated, it can affect the way that DNA interacts with histones, which are proteins that help to package DNA into a compact structure known as chromatin.
"DNA methylation of cytosine nucleotides causes DNA to wrap more tightly around histones."
DNA methylation is a chemical process where a methyl group is added to the cytosine nucleotide, one of the four nucleotides in DNA.
This addition of a methyl group typically occurs at a CpG site, where a cytosine nucleotide is adjacent to a guanine nucleotide.
When methylation occurs, it can affect the way DNA interacts with histone proteins.
Histones are proteins that help package and organize the DNA within the cell nucleus.
The DNA wraps around histone proteins to form a structure called nucleosomes, which further condense to form chromatin.
Methylation of cytosine nucleotides can cause DNA to wrap more tightly around histones by altering the accessibility of DNA-binding proteins.
This tighter wrapping can lead to transcriptional repression, which means that the genes in the methylated region may be less likely to be expressed.
In conclusion, DNA methylation of cytosine nucleotides can result in DNA wrapping more tightly around histones, which may ultimately affect gene expression.
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giving brainliest!
Which method best describes how a homeothermic organism maintains a constant internal temperature, despite changes in its external environment? (4 points)
A. Using negative feedback to decrease its external temperature when it rises above its normal range
B. Using negative feedback to increase its internal temperature when it falls below its normal range
C. Using positive feedback to decrease its internal temperature when it rises above its normal range
D. Using positive feedback to increase its external temperature when it falls below its normal range
Answers
Answer:
A
Explanation:
Yes
Answer:
B. Using negative feedback to increase its internal temperature when it falls below its normal range
Explanation:
The question asked about INTERNAL temp and how its stbalized, we know that MOST to ALL of negative feedback is getting the organism to return to its original state, high body temp was its original state, therfore,Using negative feedback to increase its internal temperature when it falls below its normal range, is the correct answer.
natural selection occurs at the organizational level to
Answers
Answer:
B) population
Explanation:
Acts on phenotypes on the individual level but evolution is at the population level. Microevolution is evolution at the population level
Hope it helps you
Fill in the blank.
The atmosphere also contains solid particles, including____from plants and _____ from volcanoes.. ?
Answers
Answer:
The atmosphere also contains solid particles, including __pollen______ from plants and _ashes_____ from volcanoes
Which of the following statements describes density-independent limiting factors?
A
Environmental extremes, such as a hurricane or drought, are examples.
B
Competition is an example.
С
Their effects increase as the population increases in an area.
Answers
The correct option is B.
What are density Dependant and independent factors?
Density-dependent factors regulate the growth of a population depending on its density while density-independent factors regulate population growth without depending on its density.
What are 4 density-independent factors?
While the previously mentioned density-dependent factors are often biotic, density-independent factors are often abiotic. These density-independent factors include food or nutrient limitation, pollutants in the environment, and climate extremes, including seasonal cycles such as monsoons.
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True/False procedures performed on the female genitalia system may be performing in the endoscopically, laparoscopically,or as an open approach.
Answers
The female genitalia scheme can be treated endoscopically, laparoscopically, or through an open approach. True.
Laparoscopically – what is it?A surgical technique known as laparoscopy enables a doctor to access the belly tummy and pelvis from the inside without needing to make significant skin incisions.
Although patients often see laparoscopic surgery as simple, it is actually major abdominal surgery with the possibility of serious side effects such as visceral injury and haemorrhage, bowel injury, or bladder injury.
Describe surgery?An appendectomy is a surgical procedure used to treat acute infection. The appendix is a tiny tube that arises from the big intestine Appendicitis.
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What are the definitions for gene pool and allele frequency?
A. the alleles for a species, the number of times a gene appears
B.the number of alleles: genes that appear in a population
C.all the alleles that appear in a population: the number of times the alleles appear
D.all the genes that are present in a population; the number of times an allele occurs in a gene pool
Answers
Answer:
Allele frequency- the percentage with which a specific allele is found in a population. Gene Pool- the sum total of all alleles present in all populations of a particular species. ... evolution involved a change in allele frequency in a population's gene pool over a number of generations.
Explanation:
I hope this helps :)
A gene pool is defined as the number of alleles. and the allele frequency is defined as the genes that appear in a population. Therefore, option B is correct.
What is gene pool ?A gene pool is the collection of all the genes (including alleles) found in a population or species that is capable of reproduction. A big gene pool has a wide range of genetic diversity and is more resilient to environmental stresses.
A gene pool is the collection of all the genes, including all the various alleles, in any population that mates with other individuals from the same or different species. The percentage of an allele within a population is known as the allele frequency.
A population's gene pool will include a high number of genes with a wide range of frequencies. Gene frequencies are proportions of various alleles within a population, and in any given generation, these frequencies will rely on those of the previous generation.
Thus, option B is correct.
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Once you have formulated your hypothesis, you would ___________.
a: collect data
b: prove or disprove it
c: design a controlled experiment
Answers
Answer:
c
Explanation:
trust
Once you have formulated your hypothesis, you would design a controlled experiment. The correct option is c.
What is a hypothesis?A hypothesis is a pre-formed or pre-designed statement for specific situations. These hypotheses are based on known facts. On the basis of the hypothesis, the experiments are concluded.
The process works by firstly formulating a hypothesis, then designing an experiment based on the hypothesis. Then choose the variables and equipment for conducting the experiment. After this conduct, the experiment.
After the experiments happened, the approval or disapproval of the hypothesis will happen. Hypothesis gives a direction for doing the experiment.
Thus, the correct option is c. design a controlled experiment regarding doing after you have formulated your hypothesis.
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Fungal groups and relatives Classify each description into the correct fungal group or relative. If a description applies to more than one group, place it into both groups. Have the smallest known oukaryotic genome Produce zoospores Sister group to fung Use polar tube to infect host Alternation of haploid and diploid generations Found in digestivo tracts of herbivores Blastocladiomycota Neocallimastigomycota Microsporidia
Answers
The smallest eukaryotic genome ever discovered: Zoospore-producing microsporidia include Blastocladiomycota and Neocallimastigomycota. Sister group to fungi: Microsporidia. Microsporidia can infect a host by using a polar tube.
From where do microsporidia originate?Microsporidia spores can be consumed or inhaled by humans, which causes microsporidiosis. According to studies, some Encephalitozoon species have been found in the urinary system of people with widespread diseases, raising the possibility of sexual transmission. The infectious form is the spore.
Which is the tiniest bacteria, virus, or fungus?Since viruses are the smallest germs and may move through the air with a cough or sneeze, they are typically the simplest to get. Spore size, nuclear make-up, and the interaction between the organism and its host cell are characteristics of microsporidia.
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May you please answer part a and b.
Answers
honestly I think its 56or 6
2. This is because, black hair is dominant and the fathers genotype has a 100% of passing it to the offspring
what is the unit used to measure how much municipal solid waste is generated
Answers
What are the visible characteristics of dense irregular connective tissue?
Select all that apply.
View Available Hint(s)
Select all that apply.
Collagen fibers running in different directions.
Fibroblast nuclei are visible in a sporadic arrangement.
Collagen, elastic, and reticular fibers can be observed on a microscope slide.
Multiple types of fibers running in different directions.
Fibers create a woven or web-type pattern observable on the slide.
Answers
Fibres create a woven or web-type pattern observable on the slide.
Collagen fibres run in different directions.
Fibroblast nuclei are visible in a sporadic arrangement.
The fibres in dense irregular connective tissue are not organised in parallel bundles like they are in dense regular connective tissue.
Collagen fibres make up the majority of dense, uneven connective tissue. In contrast to loose connective tissue, it has less ground substance. The most common cell type, which is sparsely distributed throughout the tissue, is fibroblast.
The reticular layer (or deep layer) of the dermis is where this type of connective tissue is most frequently found. The sclera and deeper layers of the skin also contain it. The skin is strong and resistant to ripping from forces coming from multiple directions thanks to the high proportions of collagenous fibres in the dense, uneven connective tissue.
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Hi, can someone help me with this?
Answers
Answer:
a) 2
b) 4; 2
c) 2
d) 2; 6; 2; 3
2a) balanced
2b) balanced
2c)balanced
Explanation:
Hope this helps!!
he says “heart muscles barely regenerate “ do you remember what stage of the cell cycle that is ?
Answers
in the laboratory, several factors are known to cause alteration fo the chemical structure of dna. the factor(s) likely to be important in a living cell is (are):
Answers
In a laboratory setting, various factors such as exposure to high temperatures, radiation, chemicals, and mechanical stress can cause alterations to the chemical structure of DNA.
However, in a living cell, the factors that are likely to be most important in causing changes to DNA are DNA replication errors and exposure to environmental agents such as ultraviolet radiation, toxins, and viruses.
During DNA replication, errors can occur in the copying process, leading to changes in the sequence of DNA bases. These errors can range from simple point mutations, where a single nucleotide is changed, to larger structural changes such as insertions or deletions of nucleotides. While the body has built-in mechanisms to correct some of these errors, they are not always successful, and some mutations may persist and lead to changes in the genetic information of the cell.
Environmental factors such as ultraviolet radiation from the sun, toxins in food and water, and viral infections can also cause damage to DNA. Exposure to these agents can result in the formation of chemical bonds between nucleotides or cross-linking between different strands of DNA, leading to breaks and other structural changes. These changes can interfere with DNA replication and repair processes, potentially leading to mutations and genetic instability.
Overall, while laboratory factors such as temperature and chemical exposure can cause alterations to DNA, the factors that are most important in a living cell are DNA replication errors and exposure to environmental agents. Understanding how these factors contribute to DNA damage and mutation is critical for understanding the development of diseases such as cancer and for developing strategies to prevent or treat them.
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Order the following big-oh complexities in order from slowest-growing to fastest-growing. It is possible some of them are actually in the same big-oh category. If that is the case, make it clear which ones have the same complexity. n 2
,3 n
, n
,1,n∗log(n),2 n
,n!,2 log(n)
,n 3
,n,n 2
log(n),log(n),2 n+1
Answers
The Big-O notation is used to determine the order of growth of algorithms. When algorithms are evaluated, they can be categorized as running in constant time, logarithmic time, linear time, quadratic time, exponential time, and so on.
The order of growth of log(n) is greater than n. It grows very slowly and is considered to have the second-slowest order of growth. For instance, if\(n=1000, log(n)\) is equal to 3.
It is faster than 3n and n2.2n+1: The order of growth of 2n+1 is exponential. It grows much faster than n3.n!: The order of growth of n! is factorial. It is the fastest-growing of all the given complexities.\(n∗log(n):\)
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After the esophagus, which comes next in the alimentary canal?
A. Large intestine
B. Stomach
C. Mouth
D. Small intestine
Answers
Answer:
B. Stomach
Explanation:
In the alimentary canal, the stomach comes next after the esophagus.
gaseous exchange in an insect
Answers
Answer:
The Spiracles is/are used for gaseous exchange in insects.
Explanation:
The Spiracles is a respiratory structure or an opening found on the exoskeleton of insects. It acts as a medium of gaseous exchange not only for Insects (Insecta) but also for some Arachnid (spiders and others).
Radioactive carbon 14 was used to determine the geologic age of old would preserved in the glacier the amount of Steve 14 in the old wood is 1/8 the normal amount of C 14 currently found in the word of living  trees  what is the geologic age of the Old wood
Answers
The estimated age of the ancient wood would be 5,730 years if carbon from a sample of wood was discovered to have only half as much carbon-14 as that from a living plant.
What is half life?Half life is defined as the amount of time it takes for a radioactive substance to break down or change. The half-life of a particular radioactive isotope is not influenced by the environment and is not dependent on the isotope's initial concentration.
The radioactivity of carbon-14 decays by 50% every 5,730 years. Radiocarbon dating depends on that half-life. Since carbon-12 doesn't deteriorate, it serves as a reliable indicator of carbon-14's impending demise. Older carbon-14 isotopes give off less radiation.
Thus, the estimated age of the ancient wood would be 5,730 years if carbon from a sample of wood was discovered to have only half as much carbon-14 as that from a living plant.
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Most phenotypic traits—features of the organism that we can observe—are not easy to put into a Punnet Square. Give at least two reasons, or factors, that make most phenotypic traits complicated. How, then, can we measure these traits?
Answers
Most phenotypic traits are complex due to polygenic inheritance and environmental influences.
Phenotypic traits often result from the combined effects of multiple genes (polygenic inheritance) and can be influenced by environmental factors. Punnett Squares, which illustrate single gene pair inheritance, are not suitable for capturing the complexity of such traits. Additionally, environmental factors can interact with genetic factors, leading to variations in trait expression.
To measure complex phenotypic traits, alternative approaches are used. Quantitative measurements, such as height or weight, provide precise numerical values. Statistical analysis helps identify patterns, correlations, and heritability estimates in populations. It involves studying large sample sizes and employing statistical models to understand the contributions of genetic and environmental factors. Molecular genetics advancements have further enhanced our ability to study complex traits at the genetic level.
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which of the following is not a pre-zygotic isolating mechanism? select one: a. temporal isolation b. habitat isolation c. hybrid inviability d. gametic incompatibility
Answers
The option that is not a pre-zygotic isolating mechanism is hybrid inviability.
Pre-zygotic isolating mechanisms are barriers that prevent mating or fertilization between different species. Temporal isolation (a), habitat isolation (b), and gametic incompatibility (d) are all pre-zygotic mechanisms. Hybrid inviability (c) is a post-zygotic isolating mechanism, as it occurs after fertilization and involves the failure of a hybrid offspring to survive or reproduce.
Among the given options, hybrid inviability is not a pre-zygotic isolating mechanism.
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Use your knowledge of science to answer the questionSelect the three correct answers
Answers
They give us the following statements
A) Glucose is broken down into carbon dioxide and water.
This statement would be correct if we are talking about cell respiration because glucose and oxygen produce carbon dioxide, water, and energy in that reaction.
B) Energy is stored in the bonds of ATP.
Completa el siguiente cuadro, colocando los hechos más relevantes de las siguientes fases que involucran la interfase:G1 Etapas Características Material genético Tiempo de duración
Answers
La respuesta correcta para esta pregunta abierta es la siguiente.
Desafortunadamente, se te olvidó incluir el cuadro. Sin el cuadro, no sabemos que lo que te estás refiriendo.
A pesar de que se te olvidó incluir la información que es determinante para responder a tu pregunta, hicimos una investigación exhaustiva para encontrar la información que nos ayude a responder tu pregunta.
Así que, estos son nuestros comentarios.
En la etapa "G1", la célula irá duplicando su tamaño y los organelos van aumentando proporcionalmente, así como las enzimas y los demás organismos que ahí se encuentran. El tiempo de duración es de 12 horas y los materiales genéticos son 2n y 2c.
En la etapa "S," las proteínas asociadas y el ADN se duplican. La célula cuenta en este momento con dos copias de la información genética. El tiempo de duración es de 6 a 8 horas y los materiales genéticos son 2n y 4c.
En la etapa "G2" empiezan a formarse las estructuras que se necesitan para comenzar al división. Comienza la condensación de cromosomas. El tiempo de duración es de 3 a 4 horas y los materiales genéticos son 2n y 4c.
Please help I need to pass this class
Answers
5. using your data, which food had the most amount of kilocalories per gram? based on what you learned about the structure of each macromolecule, why is this true?
Answers
Answer:
Fat
Explanation:
Fat provides the most energy of all the macronutrients, at a whopping 9 calories per gram.
What is one question you have about the study of life? 3-4 sentences
Answers
Answer:
my research into Sustainability Engineering, Time Use shows itself to be a very important variable. Together with ecological impacts (Ecological Footprint or Planetary Boundaries), Time Use to meet needs is a required unit of measurement. I am using both Max Neef's theory of Fundamental Human Needs, and Doyal & Gough's theory of Human Need.
In my current paper, I am wanting to make a number of statements, and I would like to know of existing publications that have made similar conclusion.
hope you like the explanation.
thanks-:)
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What is the name of the microtubule-organizing center found in animal cells that is present during all phases of the cell cycle?
Answers
Answer:
It is called the Centrosome
Explanation:
The Centrosome is known as the main microtubule organizing center of animal cells, the Centrosome participates in the organization of the microtubule network within a cell. It's formed with two centrioles surrounded by a matrix of proteins called pericentriolar material.
The cell cycle includes various phases. The microtubule-organizing center found in animal cells is present during all phases of the cell cycle are centrosomes.
What is a centrosome?A centrosome is a cellular organelle which is involved in the process of cell division.
Before cell division, the centrosome duplicates, as division begins, the two centrosomes starts moving to opposite ends of the cell.
It is the main microtubule-organizing center (MTOC) of animal cell. It is also a regulator of cell cycle progression.
Thus, the centrosome is the microtubule-organizing center found in animal cells that is present during all phases of the cell cycle.
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What is the gateway to the digestive system?
Answers
Answer:
Lower esophageal sphincter.
Explanation:
The gateway to the digestive system is lower esophageal sphincter. This ring like muscle open
and closes the passage between our esophagus
and our stomach, as needed. During the digestive process, the sphincter relaxs and lets food pass into our stomach.