Answer: Wind blows pollen from one population of plants to another, and cross-fertilization occurs. brainliest?
Explanation:
The best example of gene flow is Wind blows pollen from one population of plants to another and cross-fertilization occurs.
What do you mean by pollination?A pollinator is anything that helps carry pollen from the male part of the flower (stamen) to the female part of the same or another flower (stigma).
Self-pollination is the transfer of pollen from the anther to the stigma of the same flower.
Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different.
Thus, option A is correct, as pollination leads to fertilization which involves the gamete's interaction.
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In the carbon cycle, several processes contribute to the movement of carbon through the ecosystem. For each of the types of movement below, name the process in the carbon cycle that accomplishes it: A. Movement of carbon from the atmosphere into living organisms: ___________________ B. Movement of carbon from living organisms into the atmosphere: ___________________ C. Movement of carbon between different organisms due to feeding: ____________________
Answer:
A. Movement of carbon from the atmosphere into living organisms: PHOTOSYNTHESIS
B. Movement of carbon from living organisms into the atmosphere: RESPIRATION.
C. Movement of carbon between different organisms due to feeding: DECOMPOSITION
Explanation:
Carbon is the main element in the compounds that make up living organisms. It is found in the remains of living organisms, fossil fuels, inorganic salts, water bodies and air. It is continuously being removed from and added to the carbondioxide in the atmosphere.
The CARBON CYCLE is defined as the process which brings about the circulation of carbon compounds in nature. These processes include:
--> PHOTOSYNTHESIS: Green plants (producers) are continuously removing carbon dioxide from the atmosphere for photosynthesis. The carbon of the carbon dioxide is incorporated into sugars and other complex organic compounds in plants' tissues. When the plants are eaten by animals (primary consumers), the plant material is digested, absorbed and built up into compounds which form animal tissues. Thus, this accomplishes movement of carbon between different organisms due to feeding.
--> RESPIRATION: Plants and animals respire all the time to obtain energy. During this process, sugar are broken down to liberate carbondioxide and water as wastes. Thus this accomplishes the movement of carbon from living organisms back into the atmosphere.
--> DECOMPOSITION: This is a process in carbon cycle where decomposers feed on the dead and decaying organisms and their excreta and bring about their decomposition. They have enzymes that break down organic compounds into simple inorganic compounds. Although inorganic compounds (carbondioxide) are released during decay, decomposers absorb these compounds for their own use. When decomposers doe, othe decomposers feed on them thereby accomplishing the movement of carbon between different organisms due to feeding.
Why does the grass look green under sunlight and black under the moonlight? ( explain in the process of filtering light )
You are studying a biochemical pathway in the mold Neurospora where enzyme 1 converts the initial substrate into intermediate substrate A; enzyme 2 converts intermediate substrate A into intermediate substrate B; enzyme 3 converts intermediate substrate B into intermediate substrate C; and enzyme 4 converts intermediate substrate C into the end product, an amino acid that is essential for growth. You isolate a mutant that is unable to grow on minimal media. Which data would provide the strongest support for the hypothesis that this mutation occurred in the gene that codes for enzyme 2
Complete question:
You are studying a biochemical pathway in the mold Neurospora where enzyme 1 converts the initial substrate into intermediate substrate A; enzyme 2 converts intermediate substrate A into intermediate substrate B; enzyme 3 converts intermediate substrate B into intermediate substrate C; and enzyme 4 converts intermediate substrate C into the end product, an amino acid that is essential for growth. You isolate a mutant that is unable to grow on minimal media. Which data would provide the strongest support for the hypothesis that this mutation occurred in the gene that codes for enzyme 2?
a. The mold can grow on rich medium plus intermediate substrate C, but not on rich medium plus intermediate substrate B.
b. The mold can grow on minimal medium plus intermediate substrate B, but not on minimal medium plus the initial substrate.
c. The mold can grow on minimal medium plus intermediate substrate B, but not on minimal medium plus intermediate substrate A.
d. The mold can grow on rich medium plus intermediate substrate D, but not on rich medium plus intermediate substrate C.
e. The mold can grow on minimal medium plus intermediate substrate A, but not on minimal medium plus intermediate substrate C.
Answer:
c. The mold can grow on minimal medium plus intermediate substrate B, but not on minimal medium plus intermediate substrate A.
Explanation:
Let us first diagram the pathway for a better understanding.
The normal organism produces four enzymes that convert substrates in the medium that allow it to survive, grow, and reproduce.
initial substrate ------------> A ----------------> B ----------------> C ----------------> AA
Enzyme 1 Enzyme 2 Enzyme 3 Enzyme 4
Any mutation on the Neurospora´s enzymes will not let the organism grow on the minimal medium because it will not be able to convert the minimal substrate into the following one, because the mutated enzyme will not accomplish its original function.
So if the mutation occurs in enzyme 1, the organism will not be able to convert the initial substrate into intermediate substrate A. And the rest of the reaction will not be possible either because of the lack of substance A.initial substrate -----X----> A -------X-----> B ------X--------> C ------X-------> AA
mutated Enzyme 1 Enzyme 2 Enzyme 3 Enzyme 4
If the mutation occurs in enzyme 2, the organism will not be able to convert the intermediate substrate A into intermediate substrate B. And the rest of the reaction will not be possible either because of the lack of substance B.
initial substrate ------------> A -------X--------> B -------X------> C --------X-----> AA
Enzyme 1 mutated Enz. 2 Enzyme 3 Enzyme 4
If the mutation occurs in enzyme 3, the organism will not be able to convert the intermediate substrate B into intermediate substrate C. And the last reaction will not be possible either because of the lack of substance C.
initial substrate ------------> A ----------------> B -------X--------> C -------X------> AA
Enzyme 1 Enzyme 2 mutated Enz. 3 Enzyme 4
And if the mutation occurs in enzyme 4, the organism will not be able to convert the intermediate substrate C into the essential amino acid.
initial substrate ------------> A ----------------> B ----------------> C -------X-------> AA
Enzyme 1 Enzyme 2 Enzyme 3 Mutated Enz. 4
But, if we artificially add to the medium the substrate that should be produced by the original enzyme (and that is not converted because of the mutation), then the organism will grow and survive because the other enzymes will be able to produce the essential amino acid.
So, if enzyme 2 is the only enzyme mutated, the organism will not be able to live in a medium with substrate A because the mutated enzyme will not convert the substrate A into B. There will not be B substrate in the medium, and the other enzymes will not produce the essential amino acid. So if the mutation occurs in enzyme 2, substrate A is useless to the organism because it will not survive.
But if we add the intermediate substrate B to the medium, the organism will survive. In a medium with substrate B, all the other reactions will be possible, and the organism will get the essential amino acid. The artificial addition of B substrate will replace the function of the original enzyme 2 -which is the one that converts A into B-.
Which type of force occurs between two objects at a distance? Applied force Contact force Non-contact force Normal force
Answer:
Non contact force
Explanation:
I took test :)
4. This photograph was taken in 2004, 24 years after Mount Saint Helens erupted. Compare and contrast this photo with the previous three. What changes do you see in the biotic and abiotic factors? Does anything surprise you about this series of photographs?
Answer:
In this picture the ground is now completely covered in vegetation and trees are growing back all along the road and sides of the picture. Then there’s little flowers and grass and bushed all over the place. In the other pictures the ground was bare, with the second and third pictures having bushes and other little vegetation starting to grow. Changes in the Biotic Factors: There are now larger trees, there is grass, flowers, small bushes, and other small vegetation growing. Changes in Abiotic Factors: The ground is no longer dust and ash, The dead trunks and branches are covered in vegetation for the most part and are decomposing.
Explanation:
Brainliest Please?!
The rabbit reproduces sexually. If the
parent cells have 16 chromosomes,
how many chromosomes do the rabbit
sex cells have?
what caused the three kinds of rocks to be different from one another
Answer:
The heat and pressure.
Explanation:
Heat and pressure caused the three rock types to change, as well as weathering and erosion.
Answer:
Different rocks have different characteristics because of their minerals, the ways in which the rocks were formed, and the processes that acted on the rocks since they were formed.
Explanation:
Hope this helped!!!
A variegated leaf with green and yellow patches is used for an experiment to prove that chlorophyll is required for photosynthesis. Before the experiment the green portions (A), and the yellow portions (B), arte observed. What will be the colour of „A‟ just before and after the starch test? Also write the equation of photosynthesis and mark, well ash molecule the by-product is obtained.
Answer: The colour of A before the starch test is GREEN while after the starch test is BLUE- BLACK. The equation for photosynthesis is
6CO2 + 6H2O → C6H12O6 + 6O2.
Explanation:
PHOTOSYNTHESIS is the process by which green plants use energy from sunlight to manufacture their own food. It is a building up process since simple inorganic compounds such as carbondioxide and water are built up into large organic compounds such as glucose and OXYGEN is given off as a by product.
Oxygen given out in photosynthesis occurs in the light stage during the process of photolysis of water. This occurs when the chlorophyll traps, absorbs and captures light energy and become energised. The energised chlorophyll supplies energy which is to split molecules of water into hydrogen ion ( H+) and hydroxyl ion ( OH-). The hydroxyl ion is reconverted to water and oxygen is given out as a by product.
To show that chlorophyll is NECESSARY for photosynthesis, a variegated leaf with green and yellow patches is used for an experiment.
The green portion is marked A and the yellow portion marked B. The leaf is tested for starch using the procedure below:
--> place leaf in boiling water for half a minute to kill it.
--> decolorize leaf by placing it in hot alcohol.
--> dip decolorize leaf in hot water to soften it.
--> place leaf on tile and add iodine solution to it.
RESULT: It would be found that only the green parts contain starch as blue+black colouration is observed while yellow area is unaffected by iodine.
The skeletal system also helps us _____ muscles which are attached to bones by ______ makes our bodies move. Muscles, which are cause the bones to move, which makes our bodies move
Answer:
Dont open that link or they will track you down hope this help so you dont get kidnapped. :)
ask the question again in another one
In the early 1900s, three species of goatsbeard wildflowers, T. dubius, T pratensis, and T. porrifolius, were introduced to the United States. Each of the species had a chromosome number of 2N. In the 1930’s, a few populations of offspring from the original wildflowers were identified as having a chromosome number 4N. What does this data suggest about speciation.
A. Speciation has occurred because the original species of wildflowers produced populations of viable offspring.
B. Speciation has occurred because breeding between the offspring and original populations would not be possible.
C. Speciation has not occurred because the offspring of the original wildflowers were not introduced into a new area.
D. Speciation has not occurred because the offspring inherited identical genetic information to the original wildflowers.
Answer:
B. Speciation has occurred because breeding between the offspring and original populations would not be possible.
Explanation:
Speciation has occurred in the species due to no breeding between the offspring and original populations because the offspring and original species has different number of chromosomes in their DNA. Due to this difference in the chromosome number in the DNA, there is no chance of breeding between offspring and original species. Speciation is the evolutionary process by which populations of organism evolve with the passage of time and become different from the original species.
12
1 point
Which type of cell must contain a mutation in order for the mutation to be passed on to offspring (select 2)?
sperm cell
egg cell
skin cell
nerve cell
brain cell
blood cell
Is the adaptation physical or behavioral. Humpback whales migrate north from Antarctica to breed in warmer water.
Answer:
okay so im going with a behavioural adaptation becasue if it was physical wouldnt that mean that they would change their appearance bc of there adaptation?
okie peace
Explanation:
Answer:
This adaptation is behavioral
Explanation:
What is rule of dominance?
Answer:
Mendel's law of dominance states that in a heterozygote, one trait will conceal the presence of another trait for the same characteristic. Rather than both alleles contributing to a phenotype, the dominant allele will be expressed exclusively.
Explanation:
Hope this helps:)
What signals the end of
the cell cycle?
A. cell death
B. Cancer
C. Cell division
How many sqaure feet would I have left if I take away 30 to 40 feet from 100 by 150
The correct answer is 13,800 feet.
Explanation:
30 to 40 feet has an area of 30 x 40 = 1200 sq ft
100 to 150 feet has an ares of 15,000 sq ft.
To get to the answer, you simply subtract 1200 from 15,000 to get 13,800.
Hope this helps! :)
Where are aquifers drying up the fastest? Why are they drying up?
Answer: Aquifers that are drying up are mainly near arid climates, large cities, or agricultural stations, like farms.if the aquifer is shallow enough and permeable enough to allow water to move through it at a rapid-enough rate, then people can drill wells into it and withdraw water Excessive pumping can lower the water table so much that the wells no longer supply water they can "go dry."
When does molecular breeding give an important advantage over conventional breeding, and how can we exploit this?
Answer:
molecular breeding accelerates the times for genetic improvement
Explanation:
Molecular breeding refers to the techniques used in molecular biology to improve phenotypic features in plants and animals of agronomic and economic interest. Molecular breeding involves many diverse molecular techniques which include, among others, selection assisted by molecular markers (MAS), genome editing techniques (e.g., the CRISPR-Cas genome editing system), quantitative trait loci (QTL) mapping, gene introgression assisted by markers, etc. These techniques can dramatically accelerate breeding programs aimed at improving plant/animal traits and, therefore, they have a fundamental advantage with respect to conventional breeding methods.
Cells: Question 10
Which of these structures would be classified as an organ?
Select one:
A)A ciliated cell within the respiratory tract
B)Multiple types of tissues that work together to filter wastes from the blood
C)A liquid that contains proteins, salts, and water
D)A group of square-shaped cells surrounding a tubule
Answer:
The answer would be B.
Explanation:
An organ is a group of cells that form tissue which then make up an otgan. A group of Tissues is an Organ and tgat orgab serves a specific function in the body. The group of tissues is the organ, and the filter of waste from the blood is the function.
What types of technology are now available that would help reduce the negative impacts of sandstorms
Answer: Sandstorm is a storm which occurs when the wind currents are fast and they take away the sand from desert and other arid areas which impact the neighboring residential area.
Explanation:
The following are the technological measures that can be taken to reduce the effects of sandstorms:
1. Meteorological department must take initiative to aware people before sandstorm.
2. All buildings must have sandstorm alert alarms which are sensitive to sand so that people get aware about sandstorms.
3. Window pane must be regulated automatically to detect high speed wind currents to protect the lives inside the house.
A scientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. Which biological component would be best to use as a model for the pill’s function?
bacteriocytes
phagocytes
complement system
antibodies
Answer:
thx but the answer is D
Explanation:
A pill formulated to attack a specific type of bacteria that infects the throat would best follow the operations of antibodies.
What are antibodies?Antibodies are chemicals produced by the immune system of the body in response to external attacks by foreign substances.
In other words, antibodies are like weapons deployed to defend the body from external attacks.
A pill designed to attack a specific type of bacteria that infects the throat will be most effective if it follows the operations of antibodies.
Since different antibodies are produced for different external invasions, the pill will also be most effective by being specific in its actions.
More on antibodies can be found here:https://brainly.com/question/13981216
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need help! will give brainly! no points answers plz
Answer:
The correct answer is -
gly-met-arg-phe-val-pro
Explanation:
The production of the amino acid chain or sequence from the desired DNA sequence is called the protein synthesis or central dogma that involves two processes, transcription and translation. Transcription is the process of transcribing the information encoded in the DNA sequence into a complementary mRNA sequence. The translation is the second process that involves the translation from mRNA to a specific amino acid.
mRNA sequence is complementary to the DNA
so, DNA - CCC-TAC-CGC-AA-CG-CC
mRNA - GGG-AUG-CGC-UUU-GUC-GG
and amino acid from the chart : gly-met-arg-phe-val-pro
NEED HELP
In a population of cats, a gene that controls an observable trait has several different alleles. Which of the following best explains how genetic drift might affect the genetic makeup of this cat population over time?
It is a directed process, so it might cause an increase in the gene pool's allele frequencies.
It is a nonselective process, so it might cause an allele to disappear from the gene pool by chance.
It is a random process, so it might cause a population to reach genetic equilibrium.
It is a selective process, so it might cause an increase in the population's genetic variation.
Answer: It is a nonselective process, so it might cause an allele to disappear from the gene pool by chance brainliest?
Explanation:
PLEASE HELP I WILL GIVE BRAINLIEST
Which of the following is correct about mutations and genetic variation?
It must be present in a population before natural selection can act upon the population.
It arises in response to changes in the environment.
It tends to be reduced when diploid organisms produce gametes and reproduce.
It is created by the direct action of natural selection.
Answer:
a. It must be present in a population before natural selection can act upon the population.
Explanation:
Genetic variation is the difference in the DNA sequences in individuals, which makes a member of a species different from another member of the same species. It can also be said to be the differences in the genetic make up of individuals of a species population.
Genetic variation must be present in a species population before evolutionary mechanisms, such as evolution, can occur. Genetic variation must be present in a population of a species before natural selection can act upon the population, as natural selection can only increase or reduce the frequency of alleles present in the species population already.
Genetic variation in a population of species is important for natural selection to occur.
The true statement is that; "genetic mutation must exist before natural selection can act on it."
What is natural selection?The term natural selection refers to the fact that traits that are more favorable to enable an organism to survive and reproduce tend to persist in the population.
These traits usually occur due to genetic mutations. In a population, genetic mutation must exist before natural selection can act on it.
Learn more about natural selection: https://brainly.com/question/9904853
which major processess were needed for the origin of life on earth
Organic molecules produced from spontaneous synthesis or from meteorites
Which of the following is not a consequence of lack of conservation?
A)
cost of additional wastewater treatment facilities
B)
water contamination from overirigation
C)
availability of land for use
D)
destruction of wildlife habitats
Answer:
C. ) availability of land for use
Explanation:
Not conserving water would not increase the amount of land available for use
The punnets square shown presents a cross between two piranha. Both parents have large teeth. According to the chart which combination describes the offspring expected for the cross?
A) 50% large toothed 50% small toothed
B)75% small toothed and 25% large toothed
C) 75% large toothed and 25% small toothed
D) 100% large toothed
The probability of the parents having a child with hairy knuckles is...
What is groundwater used for in the United States?
A)
mining
B)
firefighting
C)
use in homes
D)
crop irrigation
E)
all of the above
Answer:
e.) all of the ABOVE
Explanation:
edg2021
Tom grew three inches in one year. Which organ system was directly responsible for his growth spurt?
A. Respiratory system
B. Digestive system
C. Circulatory system
D. Endocrine system,
define the word corrosion
Answer:
Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reaction with their environment
Explanation:
i hope you like give brainliest if you do
Answer:
the process of corroding metal, stone, or other materials
corroding: destroy or damage (metal, stone, or other materials) slowly by chemical action.
The process of destroying metal, stone, or other materials.
Explanation: