what are the four postulates of "the theory of inheritance of acquired characters”?​

Answers

Answer 1

Summary of four postulates of the theory of inheritance of acquired characteristics:

1. Living organisms or their component parts tend to increase in size.

2. Production of new organ is resulted from a new need.

3. Continued use of an organ makes it more developed, while disuse of an organ results in degeneration.

4. Acquired characters (or modifications) developed by individuals during their own lifetime are inheritable and accumulate over a period of time resulting a new species.

Answer 2

Explanation:

1. New needs:

Every living organism is found in some kind of environment. The changes in the environmental factors like light, temperature, medium, food, air etc. or migration of animal lead to the origin of new needs in the living organisms, especially animals. To fulfill these new needs, the living organisms have to exert special efforts like the changes in habits or behaviour.

2. Use and disuse of organs:

The new habits involve the greater use of certain organs to meet new needs, and the disuse or lesser use of certain other organs which are of no use in new conditions. This use and disuse of organs greatly affect the form, structure and functioning of the organs.

Continuous and extra use of organs make them more efficient while the continued disuse of some other organs lead to their degeneration and ultimate disappearance. So, Lamarckism is also called “Theory of use and disuse of organs.”

So the organism acquires certain new characters due to direct or indirect environmental effects during its own life span and are called Acquired or adaptive characters.

3. Inheritance of acquired characters:

Lamarck believed that acquired characters are inheritable and are transmitted to the offsprings so that these are born fit to face the changed environmental conditions and the chances of their survival are increased.

4. Speciation:

Lamarck believed that in every generation, new characters are acquired and transmitted to next generation, so that new characters accumulate generation after generation. After a number of generations, a new species is formed.


Related Questions

Tabla de comparación entre el reino protista y fungí

Answers

What you want say?????

which language is this?

Which factor will decrease photosynthesis?
abundant carbon dioxide
balanced pH
increased light intensity
not enough water

Answers

ANSWER :

Not enough water

Definitely not enough water, we have a whole ocean full of it, boy, we can just take the water and clean the water so we can drink it, don’t click water , if it’s right, your teacher bad, we literally have water in the ocean that we can used to drink after it’s cleaned

explain the structure of molar​

Answers

Answer:

Molars are the biggest of all the teeth. They have a large, flat surface with ridges that allow them to chew food and grind it up. Adults have 12 permanent molars — six on the bottom and top jaw, and children have eight primary molars.

Hope it works!!!!

Molar are two: premolar and molar.
Premolar is found in front of molar
Molar is the fares from all types of teeth

What are some of the potential consequences of eating large fish like halibut more than a few times per month?

Answers

Answer:

They break down to form uric acid ,which can contribute to gout and the development of kidney stones for some people.

ethyl methane sulfonate is a chemical mutagen that modifies bases in DNA this agent causes c to be mutated to

Answers

Ethyl methane sulfonate is a chemical mutagen that modifies bases in DNA. This agent causes C to be mutated to T

The video compares the key similarities and differences between mitosis and meiosis. Determine which events occur in mitosis, meiosis, or in both mitosis and meiosis. Write each event to the appropriate category. a. Chromosomes duplicate during interphase b. The first division separates homologous pairs; the second division separates sister chromatids c. A single division occurs, separating sister chromatids Homologous chromosomes pair up and form chiasmata d. Daughter cells contain recombinant chromosomes e. Process starts with a diploid cell Homologous pairs of chromosomes line up on the metaphase plate f. End result is four haploid cells that are genetically different from each other and the parent cell g. Duplicated chromosomes line up Individually on the metaphase plate in a diploid cel h. End result is two diploid cells that are genetically identical to each other and the parent cell Mitosis Melosis Both mitosis and meiosis

Answers

Answer:

Mitosis:

A single division occurs, separating sister chromatids

End result is two diploid cells that are genetically identical to each other and the parent cell

Meiosis:

The first division separates homologous pairs; the second division separates sister chromatids

Homologous chromosomes pair up and form chiasmata

Homologous pairs of chromosomes line up on the metaphase plate

Daughter cells contain recombinant chromosomes

End result is four haploid cells that are genetically different from each other and the parent cell  

Mitosis and Meiosis:

Chromosomes duplicate during interphase

Process starts with a diploid cell

Duplicated chromosomes line up Individually on the metaphase plate in a diploid cell

Explanation:

Mitosis is the division of vegetative cells while meiosis involves the division of sex cells. Both divisions start with diploid parental cells but while the daughter cells in mitosis are also diploid, those of meiosis are haploid. This is why mitosis is referred to as equational division while meiosis is known as reductional division.

A cell that will undergo mitosis or meiosis would first have its genetic materials duplicated during interphase in addition to the synthesis of other important biochemicals such as proteins. Mitosis involves just a single division of the sister chromatids with two genetically identical daughter cells who are also clones of the parent cells resulting.  

Meiosis, on the other hand, involves two divisions - the first one happens to separate homologous chromosome pairs while the second division separates sister chromatids just like in mitosis.  During the early stage of meiosis, homologous chromosomes synapsed through the formation of a synaptonemal complex to form tetrads. Thereafter, synapsed chromosomes exchange chromosomal segments at a point known as chiasmata. All these happen at the prophase stage of meiosis I. The paired homologous chromosomes are then lined up at metaphase where they are engaged by the spindle fibers.

Meiosis II and mitosis are more or less the same with the chromosomes condensing at the prophase and the formation of metaphase plates at the metaphase. Sister chromatids are pulled apart and they migrate to the opposite poles at the anaphase and telophase.

Explain the relationship of the structure of cell membrane molecules to the function of the cell membrane overall. You must discuss the structure/function relationship of at least 3 different molecules that compose the cell membrane.

Answers

The answer is c because of the

The area is the brain the controls, temperature, metabolism and water/electrolyte balance is called?

Answers

Answer:

The Hypothalamus

Answer:

Hypothalamus

Explanation:

Chromosomal sex, also known as genetic sex, is determined genetically through the chromosome combination XX or XY.

Question 12 options:
True
False

Answers

Answer:

it's true

I hope it's helps you

Yes, it's true. Chromosal sex is currently determined through the chromosal combination.

What is the difference between cellular respiration and gaseous exchange​

Answers

Answer:

Gas exchange is the intake of oxygen and the excretion of carbon dioxide at the lung surface. Oxygen moves into the blood and carbon dioxide moves out of the blood. Cell respiration is the process that releases energy from the food


Products of DNA replication

DNA replication occurs during Interphase. What Image shows the products of replication. If the parent strands are blue and the new strands are red? Click the correct box.

Answers

Answer:

The red one.

Explanation:

The red colour strands are the products of replication in which new DNA molecules are formed. The main purpose of replication is to produce extra set of DNA molecules for the new cell so that each cell receives extra molecules of DNA. Due to DNA replication, the cell has two types of DNA i.e. parent strands and new strands. The parent strands are blue in colour whereas the new strands are red in colour.

Which is a component of the biosphere?
bacteria
argon
mountains
D.
permafrost
Reset
Next

Answers

Answer:

bacteria

Explanation:

In working with Drosphilia it is common to use a balancer stock to maintain mutations of interest. The balancer chromosomes are generally carrying multiple inversions on them. What effect would the inversions have on meiosis

Answers

Answer:

Fusion or pairing does not occur.

Explanation:

Inversions mutation leads to lowered fertility due to production of unbalanced gametes in the meiosis cell division. Chromosome inversions have no effect on mitosis, but they has affect meiosis because inversions changes the gametes which is only present in meiosis. If an inversion present is in the heterozygous condition, pairing of chromosomes cannot occur in a simple linear fashion due to change of sizes. But if the inverted chromosome segment has the proper size so it can paired with each other.

what similes best describes how your mind learns and remember

Answers

Answer:

The mind is like a: filing cabinet.

Explanation:

g An Hfr strain is produced when Select one: A. an F episome is transferred to a new cell. B. an F episome leaves the E. coli chromosome. C. an F episome leaves the host chromosome and removes some of the host chromosome. D. an F episome integrates into the E. coli chromosom

Answers

Answer:

A. an F episome is transferred to a new cell.

Explanation:

Hfr strains arise from the integration of the plasmid into the bacterial cell in one of several ways such as the recombination of events. Most commonly are formed by the UV-induced integration of E coil F factor. It tries to transfer a copy of the F factors as well the entire chromosome to the recipient bacterium.

answer the questions please​

Answers

Answer:

you learn about vampires

hahah

A scientist is studying some developing eggs from an ocean sample. The early embryos have divided only a few times, and all cells look identical. When the scientist carefully removes half the cells from an embryo, both clumps of cells are able to complete development, forming twins. The eggs can be identified as cnidarians. crustaceans. protostomes. deuterostomes. echinoderms.

Answers

Answer:

The correct answer is - deuterostomes.

Explanation:

Duetorstomes eggs ,During embryonic development the zygote undergoes cleavage. Cleavage results is slitting into multiple cells where ease cell has the ability to develop into a complete embryo when isolated.

12. What would be the other strand of DNA?
-A T C C G A A GTC C GA G-

Answers

Answer:

TAGGCTTCAGGCTC

Explanation:

The complementary base of Adenine is Thymine in a DNA strand but it is Uracil if it's a Mrna strand

then the complementary base of cytosine is therefore guanine

A body of fresh water is shown below.

Which point in this body of water is most likely to have no plants growing?
A. Point C
B. Point D
C. Point A
D. Point B

Answers

Answer:

B. Point D

Explanation:

I just took the quiz

In the given image, on point D, it is not possible to have any plant. The correct option is B.

What are the requirements of plants to grow?

To grow plants require enough sunlight, carbon dioxide and water. By using all these, plant perform photosynthesis by which it can survive.

As point D in the given image has no light sources, as sunlight cannot penetrate deep into the water, it is impossible to have growing plants here.

Thus, the correct option is B.

For more details regarding plants, visit:

https://brainly.com/question/13976657

#SPJ2

A suspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. To follow this process by monitoring the release of CO214, at which positions in the glucose molecule would the C14 label need to be incorporated

Answers

Answer:

carbons 3 and 4

Explanation:

Alcoholic fermentation is an anaerobic (non-oxygen-requiring) pathway capable of converting one mole of glucose (C6H12O6) into two moles of ethanol (C2H5OH) and two moles of carbon dioxide (CO2), producing during this process two moles of ATP. The overall chemical reaction is as follow: C6H12O6 (glucose) >> 2 C2H5OH (ethanol) + 2 CO2.  During this process (fermentation), energy is obtained from the glycolysis process by which each glucose molecule is broken down into two pyruvate molecules (2 CH3COCOO−). Pyruvic acid is an organic acid that ionizes to produce a hydrogen ion and a molecule of pyruvate. Subsequently, this pyruvate is then converted into ethanol and CO2, generating NAD+, i.e., the oxidized form of nicotinamide adenine dinucleotide or NAD, which is required for glycolysis (and therefore to produce ATP). Moreover, dismutation refers to the redox reaction by which one compound with an intermediate oxidation state converts into two compounds. In consequence, the CO2 generated during fermentation arises from the dismutation of pyruvic acid. During this process, the major source of CO2 is carbon 3 (C3) and carbon 4 (C4) of the glucose as a result of the dismutation of pyruvate, and thereby these positions in the glucose molecule would the C14 label need to be incorporated.

Who was Dr. Joseph Bell?

Answers

Answer:

Sherlock Holmes

Explanation:

He was the inspiration. Not the actual Holmes.

Answer:

Joseph Bell  (2 December 1837 – 4 October 1911) was a Scottish surgeon and lecturer at the medical school of the University of Edinburgh in the 19th century.

1. What are the three "common characteristics” of model organisms?

Answers

Answer:

they need food for survival

What is the probability of the parents having a daughter?

Answers

Answer:

1/ 2

Explanation:

since the parents can have only a son or a daughter

the total number of outcomes = 2

and favorable outcome = 1

probability of an event = no. of favorable Outcomes/ total number of Outcomes.

= 1/ 2

Hola, necesito ayuda con este ejercicio. Regalo 70 puntos, 5 estrellas y corazón.

Answers

Respuesta corta: Produciendo un sentimiento de satisfacción.

Explanation

En el texto se hace referencia a una investigación para analizar la relación entre las redes sociales y el cerebro de los adolescentes. Para ello los investigadores utilizaron imágenes magnéticas del cerebros de los 32 adolescentes estudiados. Una vez terminaron el estudio se dan cuenta que "una estructura del cerebro, llamada núcleo accumbens, se activa más cuantos más likes tuviera una imagen". Además, el autor del texto agrega que "Esto es interesante si se tiene en cuenta que este órgano nervioso es el responsable de que experimentemos momentos de placer intensos al ganar un premio, comer helado, etc". De acuerdo a lo anterior se puede interpretar que las redes sociales influyen en el cerebro de los adolescentes debido a que produce en ellos un sentimiento de satisfacción o reconocimiento a recibir "likes" de otras personas. Además, este sentimiento se puede interpretar como aprobación por parte de las demás personas.

Out of 800 progeny of a three-point testcross (testcross for a heterozygote for all three loci) there were 16 double crossovers, whereas 80 had been expected on the basis of no interference (Hint: each double CO produces two double recombinants). The interference is:_________
a. 0.690
b. 0.310
c. 0.655
d. 0.090
e. 0.045

Answers

Answer:

a. 0.690

Explanation:

Since there are 16 double crossovers and 80 are expected to be basis of no interference. The total interference will be 0.80 based on the 800 progeny.

How are meiosis and mitosis different?

Answers

Answer:

b. only meiosis results in a reduction in chromosome number

Explanation:

what is the minimum weight that requires 2 people to lift a dog​

Answers

In a perfect world, a "safe" lift would be 51 pounds i think, not sure tho sorry

If there is an increase in stimulation by the sympathetic nervous system

Answers

May i know the complete sentence?

why is it important to record all data and procedures in an experiment?

Answers

Answer:

Answer:important to record all data and procedures because if we list that data then we can see that which we record

hope this will help you

Answer:

Good record keeping can help user to track errors or refine an experiment.

Records can be used to audit or to check data integrity

How the aging is related with the methylation? The methylation increase or decreased ?

Answers

Aging is strongly correlated with changes in DNA methylation. DNA methylation and epigenetic alterations have been directly linked to longevity in a wide array of organisms, ranging in complexity from yeast to humans.
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