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.
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.
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what are the advantage of the presence of hydrogen in large scale in the sun ?
hydrogen is essential to nuclear fusion. hydrogen is the fuel the sun burns. we don't have to burn solar energy, so there's no smoke and pollution
Answer:
Hydrogen fusion reaction is the one which provides so much light and heat (in short, energy) which escapes into space and spread. If Hydrogen on sun ends, It will lose its warmth (and may be soon become a planet, but will surely be a dead star).
Explanation:
Answer from Gauth math
what would happen if the diet if a chid provide enough calories but is deficient in poteinsg
very short
Answer:
Serious protein deficiency can cause swelling, fatty liver, skin degeneration, increase the severity of infections and stunt growth in children.
While true deficiency is rare in developed countries, low intake may cause muscle wasting and increase the risk of bone fracture
Hope this helps you :)
what was the dependent variable
Answer:
Dependent and independent variables are variables in mathematical modeling, statistical modeling and experimental sciences. Dependent variables receive this name because, in an experiment, their values are studied under the supposition or demand that they depend, by some law or rule, on the values of other variables.
Question 3 of 25
A flashlight beam passes from the air through a car window. What happens to
the speed of the light wave as it passes from the air to the glass?
Water
Diamond
Glass
Alr
Speed of
light (m/s)
225,000,000
125,000,000
200,000,000
299,700,000
A. It decreases.
B. It stays the same.
C. It increases
OD. It falls to zero
SUBMIT
Answer:
it increases
Explanation:
becaus light beam is so strong it can be dangerous to eyes and when the people see it they go blind
Researchers note that a plant closes its stomata on a hot, dry, windy day. What statement describes the plant response to these
conditions?
A)
The stomatal closings and the environmental conditions are unrelated for this plant.
B)
The stomatal closings and the environmental conditions are unrelated for
this plant.
Water loss and water stress is highest on hot, dry, windy days, so the plant
closes stomata to conserve water.
Hot, dry, windy days are not conducive to pollen spread, so the plant closes
its stomata to prevent pollination.
Photosynthesis is decreased on hot, dry, windy days, so the plant closes its
stomata to prevent carbon dioxide diffusion.
a
D)
Answer:
It is B
Explanation:
i just took it
If a plant closes its stomata on a hot, dry, and windy day, the plant response to these conditions is water loss and water stress is highest on hot, dry, windy days. So, the plant closes its stomata to conserve water.
What do you mean by Stomata?Stomata are the tiny pores present on the surface of the leaves. A huge amount of gaseous exchange may take place in the leaves through these pores for the purpose of photosynthesis.
During photosynthesis, these stomatal pores take carbon dioxide and water is gradually lost, in order to prevent this water loss in hot and humid conditions, the plant closes its stomata.
Therefore, if a plant closes its stomata on a hot, dry, and windy day, the plant response to these conditions is water loss and water stress is highest on hot, dry, windy days. So, the plant closes its stomata to conserve water.
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How successful was the NGP in influencing economic growth and development in South Africa
In government's review of the first 15 years of democracy, it was concluded that South Africa was successful in maintaining macro-economic stability, taking advantage of the natural resource base of the country, establishing a sound trade regime, maintaining and broadening the financial and physical infrastructure of ...
What is the classification of Ubiquitin Screening Services?
Creative Bioarray offers a wide range of cell-based ubiquitin drug target services, including deubiquitinating enzyme (DUB) profiling services, inducible degrader of LDLR (IDOL)-E3 ligase assays, custom HTS-compatible assays, and so on.
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Answer:
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What is assimilatory power?
A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. It is typically officially authorized and maintained by a sovereign state, with its members identifiable by their distinct military uniform.
Cellular respiration produces
What is Alzheimer's disease??
Answer:
Alzheimer's disease is a progressive neurologic disorder that causes the brain to shrink (atrophy) and brain cells to die.
Explanation:
Hope it is helpful.
Thankyou
Answer:
Alzhimers disease is a progressive neurologic disorder that causes the brain to shrink and brain cells to die . Alzhimers disease is the most common causes of dementia - a continious decline in thinking behavorial and social skills that affects persons ability to function indepedently .
DNA is negatively charged. Therefore, it is
O hydrophilic
O hydrophobic
Mutations in which of the following cells would get passed on to the next generation?
I. sperm
II. Skin cell
III. Egg
IV. Neuron
A. II, III, and IV
B. III only
C.I and III
D. I, III, and IV
Answer:
C. I and III
Explanation:
A mutation needs to occur in a gamete cell in order to be passed down to the next generation.
If it occurs in a somatic (body) cell, the mutation will only be present in that organism.
On the other hand, in a gamete cell, the mutation will pass down because gamete cells are directly involved in the genetic makeup of the offspring.
So, since sperm and egg cells are gametes, mutations in those cells would get passed on.
The correct answer is C. I and III
What are the main structural supports for the vertebrae
Answer:
Intervertebral Discs
Explanation:
Between each vertebral body is a cushion; the intervertebral disc. Discs absorb stresses the body incurs during movement and prevents vertebrae from grinding against one another. The intervertebral discs are the largest structures in the body without a vascular supply
Answer:
The dorsal hollow nerve cord
Explanation:
The dorsal hollow nerve cord develops into the central nervous system;the brain and spine
Help anyone please????!
Performed by heterotrophs.
Select one:
a. Cellular Respiration
b. Photosynthesis
c. Both Photosynthesis and Cellular Respiration
d. Neither Photosynthesis nor Cellular Respiration
Answer:
A) Cellular Respiration
Explanation:
Heterotrophs undergo cellular respiration in order to turn the food they eat into energy they can use and unlike autotrophs, they cannot make their own energy so photosynthesis isn't required.
YA'LL ARE SMART!!! PLEASE HELP!!!!
Answer:
Metals takes up most of the left side of the periodic table.
HELP ASAP NEED HELPPPPP
Answer:
insects is a write answer.
John wants to test how temperature affects the mass of sugar that can be
dissolved in water. Which of the following factors must be the same between
the control group and the experimental group?
A. The temperature of the water
B. The mass of the sugar
C. The volume of the water
D. The time of day
SUBMIT
Answer:
c
Explanation:
the volume or temperature ️ of water
The Calvin Cycle can best be described as which type of reaction?
Answer:
In plants, carbon dioxide (CO2) enters the chloroplast through the stomata and diffuses into the stroma of the chloroplast—the site of the Calvin cycle reactions where sugar is synthesized. ... This type of reaction is called a reduction reaction, because it involves the gain of electrons.
What are the features of Nuclear Receptor Screening Services?
Nuclear receptors (NRs) are a class of proteins responsible for thyroid hormones and sensing steroid and certain other molecules. There are 48 genes in the human genome that code for the NRs. As the largest family of eukaryotic transcription factors, NRs control numerous processes involved in development, cell cycle, and important metabolic pathways.
https://dda.creative-bioarray.com/nuclear-receptor-screening.html
Answer:
The nuclear receptor superfamily comprises a large group of transcription factors that play a key regulatory role in development and homeostasis of multicellular organisms. A special feature of nuclear receptors is their ability to bind to condensed chromatin templates, which makes them important initiators of gene transcription. Moreover, the ability of nuclear receptors to sequentially recruit a variety of transcription factors and coregulators to target promoters and to orchestrate the whole process of gene transcription confirms their biological significance and stimulates intensive research and a high level of scientific interest in this field. In this review, we summarise current knowledge regarding the structure and function of nuclear receptors as principal regulators of gene expression. Emphasis is given to the molecular mechanisms of nuclear receptor-mediated transcriptional activation and repression including recent progress made in this area.
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(iii) Enzymes P, Q and R (choose any one)
P - pepsin / protease
Q - amylase / carbohydrase
R - lipase / trypsin / protease / amylase
(c) There are many ways in which different types of enzymes are using in preparing baby foods such as the amylase breaks down the starch and the starch breaks down to maltose or glucose. The protease breaks down protein and the protein breaks down into amino acids. The lipase breaks down fats and then the fats break down to gylcerol.
Hope it's help you.If it is right
other, than photosynthesis which process is Autotrophic.?Give examples too.
Answer:
Some rare autotrophs produce food through a process called chemosynthesis, rather than through photosynthesis. ... Instead, they make food using energy from chemical reactions, often combining hydrogen sulfide or methane with oxygen.
prove that Sin^6 ϴ-cos^6ϴ=(2Sin^2ϴ-1)(cos^2ϴ+sin^4ϴ) please sove step by step with language it is opt maths question
Devise an experiment to test the effect of pH on the activity of biological washing powder
Answer:
boil a water on a container deep your face inside it and you know the temperature ️ of water
a special effects artist mixes two different liquids in a bowl. both liquids are white. when she heats the bowl, a new compound forms. will the new compound be a white liquid?
Answer:
if a special effects artist mixes two different liquids in a bowl and they both are too white !
after heats those liquids
its forms curd like substance
its either will be white, its can increase its colour as darkish white or lightly yellowishblack
when she heats the bowl, a new compound forms and it will be white before heating and after heating it may be white or other dark color.
What are the properties of a compound ?A compound composed up of two or more elements which are chemically combined with a fixed proportion by their mass.
For example, Water, Sodium Chloride, Ammonium Chloride etc.
They have fixed melting and boiling points.
Formation of compound is a change in chemical reaction and the components of compound are mixed in a fixed proportion.
Two major types of compounds are covalent and ionic compounds.
Covalent compounds refers to formation of covalent bond among two nonmetals, like water or methane. These molecules are neutral and weak.
When metal react with non metal it form Ionic compounds, are held together by opposite charges, so the bond is stronger than covalent compound.
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pituitary is to brain as thymus is to
Answer:
Explanation:
chest
What is a living cell?
Answer:
Though they are often debated, there are eight main characteristics that define a cell as living.
The first is genetic code. All living things contain DNA, which is like the instruction manual for life. DNA is contained in each cell, and passed from parent to offspring.
The second is growth and development. Whether by creating more cells or creating more organelles within the cell, all living things grow and develop.
The third characteristic is reproduction. Reproduction can be sexual or asexual, but in the case of single cells, it is asexual.
The fourth characteristic is response. All living things, including cells, react to external stimuli, such as temperature or salinity.
The fifth characteristic is homeostasis. Homeostasis is the condition by which living things maintain a stable internal environment in the midst of an ever-changing external environment.
The last three characteristics go hand in hand, and are sometimes combined, but in my mind they are distinctly separate.
Sixth is consumption, which is taking in food and other materials. A cell specifically takes in molecules such as water or glucose during consumption.
Seventh is metabolism, which is using materials consumed in order to create energy. Living cells use enzymes to break down materials to produce ATP (adenosine triphosphate), which is usable energy.
Finally, all living cells undergo excretion in some form. Some examples in cells include exocytosis and osmosis.
These 8 characteristics, though often controversial, determine a cell as living.
a body may have zero velocity even though its speed is 10m/s. give reason.
Explanation:
because speed is time rate at which an object is moving along a bath, while velocity is the rate and direction of object's movement .
If you kill someone while driving under the influence, you can
Answer:
you can go to jail. in most cases you will go to jail
Explanation:
