Natural selection is an evolutive force that favor beneficial alleles increasing their frequency. The correct option is C). variation, inheritance, speciation.
What is Natural Selection?
Natural selection is an evolutive force that selects beneficial alleles and increases their frequency in the population. It results from the interaction between the individuals' phenotype and the environment, which determines gene destiny in space and time.
Natural selection results in adaptation, meaning that it causes an increase in the aptitude phenotype.
Aptitude (or fitness) is the contribution of each genotype to the next generation. It is reflected by the phenotype that results in the survival, fertility, and capability of having a mate. It is a way of measuring the individual ability to leave fertile offspring. Aptitude must be significant to the natural selection act in its favor.
Natural selection can act favoring an allele or against it, according to how it affects the fitness of individuals.
In many cases adaptations, resulting from natural selection can be correlated to environmental factors or selective pressures applied by other organisms or habitats.
The selective agent is the environmental trait that determines the differential survival of the phenotypic classes. The environment influences the probability that each genotype passes its gametes to the next generation.
Natural selection also acts on variation caused by mutations. Let us remember that a mutation is a change or alteration in DNI sequences that introduce new variants.
Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.
Hence, a mutation can cause variation. If this variation turns to be beneficial to the population and increases individuals' fitness, it is favored by natural selection.
New generations inherit these new variants increasing their frequency in the population.
According to the environment and the species distribution, these changes might lead to speciation.
The correct option is C) variation, inheritance, speciation
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what are the molecules which are the result of any chemical reaction.
Answer:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
Please help me with number 4
17. Which British law does the illustration on the right refer to?
Please help
Answer:
The British Law does the illustration on the right refer to Publication Right .
I hope this will be the answer
Some bacteria possess antibiotic resistance, as well as the ability to survive through adverse conditions. Where in this type of bacteria is the DNA located?
a. nucleoid, fimbriae , and plasmids
b. fimbriae, nucleoid, and endospore
c. endospore, fimbriae, and plasmids
d. plasmids, nuclouid, and endospore
Answer:
d. plasmids, nucleiod, and endospore
Explanation:
Bacteria are prokaryotic organisms i.e. they do not possess a well defined nucleus in their cells. However, according to this question, some bacteria are said to possess antibiotic resistance, as well as the ability to survive through adverse conditions. These two characteristics of some bacteria is attributed to the possession of a plasmid and endospore respectively.
A plasmid is a circular extra-chromosomal DNA found in bacterial. It is termed "extra" because it is different from the DNA of the bacteria and carries different genes. The genes contained in the plasmid often gives the bacteria added advantage like antibiotic resistance. On the other hand, endospores are asexual spores produced by bacteria in order to withstand adverse environmental conditions like drought etc.
answer ASAP
Put the following events in the correct order:
A. The amino acid sequence built from the mRNA varies
B. As the DNA sequence varies the mRNA sequence that is created during transcription
varies,
C. Since the structure of the protein determines its function we see variation in the traits
expressed due to how that protein ultimately functions based on its shape
D. This causes the structure of the protein to be different because different amino acids
are used.
Answer:
B → A → D → C
Explanation:
This question involves gene expression, which is the process of how gene is used to synthesize proteins that determine the phenotype or traits of an organism. Gene expression involves two processes namely: transcription and translation.
- Transcription is the process whereby a DNA template is used to synthesize a mRNA sequence.
- Translation is the process whereby the mRNA transcript is used to synthesize an amino acid sequence, which eventually becomes a protein.
Based on this, the correct order of sequence of events given in this question will be:
- As the DNA sequence varies, the mRNA sequence that is created during transcription varies (transcription).
- The amino acid sequence built from the mRNA varies (translation).
- This causes the structure of the protein to be different because different amino acids are used.
- Since the structure of the protein determines its function we see variation in the traits expressed due to how that protein ultimately functions based on its shape.
Why do we observe that superficial, varicose veins are more common in the lower extremities than in the upper extremities?
Answer:
Varicose veins are twisted, enlarged veins. Any superficial vein may become varicosed, but the veins most commonly affected are those in your legs. That's because standing and walking upright increases the pressure in the veins of your lower body.
Explanation:
Which option lists materials in order by their ability to allow the flow of
electrons, from least easily to most easily?
A. Insulator, semiconductor, conductor
B. Conductor, semiconductor, insulator
c. Semiconductor, insulator, conductor
O D. Semiconductor, conductor, insulator
The correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
What are an electron, an insulator, etc.?The ability of a material to conduct electricity depends on the number of free electrons that are available to move through the material. In an insulator, there are very few free electrons, which means that the material does not conduct electricity very well. Insulators are typically used to prevent the flow of electricity, for example, in electrical wiring, where plastic or rubber coatings are used to insulate the copper wires.
Hence, the correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
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What might happen to the cell if it were suddenly unable to use lipids?
A. It would not be able to make proteins or transfer substances to other cells
B. would not be able to transfer genetic information to other cells
C. It would not be able to store energy or communicate with other cells
D. It would not be able to store water or protect itself from viruses
Explanation:
I don't know the exact answer but I can tell you that lipids are considered the building blocks of cells . the body uses lipids as a storage for energy and insulation and to make cell membranes. without lipids the cell will die . the way lipids function is .... lipidsfunction as an energy reserved regulate hormones transmit nerve impulses cushion vital organs and transport fat soluble nutrients.
I hope this can help you a little bit good luck!
Answer:
B
Explanation:
Lipids are used to store information.
Help!!! I need some help on this I will give heart and stars
Answer:
Energy energy.
Explanation:
Energy because it talk about light energy because of the heat, and levels.
How would transcription of the E. coli trp operon be affected by changing the two Trp codons in the leader peptide gene to His codons?
Answer:
The attenuation system would respond more to histidine (His) than to tryptophan (Trp) levels
Explanation:
In genetics, the attenuation system refers to the process of control which is responsible for triggering premature termination of transcription in bacterial operons. In bacteria, the process of attenuation is characterized by the presence of an attenuator, which is a stop signal sequence found in the leader mRNA. The tryptophan (trp) operon, which is a cluster of genes responsible to encode the components required during the production of tryptophan, is controlled by the attenuation system. When there is a high tryptophan level, the ribosomes are able to translate an attenuator sequence, thereby resulting in termination of transcription. The attenuation system also controls the synthesis of other amino acids including histidine (His), phenylalanine (Phe) and threonine (Thr).
The process of meiosis is essential in the sexual reproduction and life cycle of many organisms. The outcome of meiosis is haploid gametes. Which statements correctly describe the importance of meiosis to the life cycle or these organisms?
A) Increasing genetic diversity ensures that no two haploid gametes are exactly the same.
B) Taking a diploid cell to its haploid state occurs during the first cell division of meiosis.
C) Checkpoints during meiosis ensures that chromosome separation occurs accurately, avoiding non-disjunction.
D) DNA synthesis occurs before each cell division in meiosis ensures that the integrity of the chromosomes is maintained.
E) Reducing the number of chromosomes by half during meiosis ensures the chromosome number is maintained during fertilization.
Answer:
Its A,B,C, and E on USATESTPREP
Explanation:
Most fungi are aquatic.
True
False
Rock pocket mice live in the deserts of the American southwest. Ancestral pocket mice all had light-colored coats that blended in
with the region's rocks and sandy soil, keeping the mice hidden from predatory owls. About 1.7 million years ago, a series of
volcanic eruptions spewed out wide trails of black lava into the middle of rock pocket mouse territory. Currently there are two color
morphs of rock pocket mice: light-colored mice that are typically found in habitats with sandy soil, and dark-colored mice that are
typically found in habitats with dark-colored lava rocks.
Which of the following best justifies the claim that alleles that may be adaptive in one type of environment can be deleterious in
another because of different selective pressures?
Answer:
C
Explanation:
Just answered this
How can humans interfere with the phosphorus cycle?
Answer:Humans affect the phosphorus cycle mainly by the use of fertilizers and raising livestock, especially hogs.
Explanation: Hope this helps:)
How many nucleotides are there in 5 codons?
Answer:
15 because one codon is three nucleotides
What spheres are affected by pesticides? Is the atmosphere, geosphere, hydrosphere, and biosphere affected by pesticides?
Which changes are environmental effects of farming?
A: Flooding
B: Soil Erosion
C: Increased Carbon Dioxide Levels
D: Habit Loss
Which best describes trees in temperate regions?
they have rings that form each season
the annual rings indicate secondary growth
the hormone abscisic acid is release each Autumn
all of the above
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rabies:
What are the symptoms the animal would exhibit?
How does the disease impact the animal?
How could you prevent exposure to this disease?
Answer:
Symptoms:
FeverHeadacheHydrophobiaPhotophobiaAgitation Increased salivationThe animal becomes hyperreactive to external stimuli and bite at anything nearIncoordination is seen due to rear limb paralysis and drooling and difficulty swallowing is caused by paralysis of facial and throat muscles.It's a deadly disease. Death is usually caused by respiratory arrest.
Prevention can be done through:
Vaccinating dogs, cats, and ferrets against rabiesKeeping pets under supervisionContacting an animal control officer if the animal is acting strangelyA. Objective type questions
Choose the correct answer.
1. Which of the following is not transported by the xylem and phloem tubes on the stem?
a) Sugar
b) Water
c)
Carbon dioxide
d) Mineralsalt
Answer:
C) Carbon dioxide
Explanation:
Xylem and Phloem are tissues that majorly transport food and liquid components e.g water within a plant they are not responsible for transportation or gas e.g Carbon dioxide. The respiratory organs which are Stomata and lenticels are the ones in charge of that
DO NUMBER 3 FOR 50 POINTS
Answer:
nucleotides
Explanation:
Which substances are cycled between living thing and non living environments?
Which representation of data visualizes potential relationships between variables?(1 point) a table a graph a chart a list
Answer:
A chart
Explanation:
A database management system (DBMS) can be defined as a collection of software applications that typically enables computer users to create, store, modify, retrieve and manage data or informations in a database. Generally, it allows computer users to efficiently retrieve and manage their data with an appropriate level of security.
A chart is a representation of data which visualizes potential relationships between variables. Some examples include pie chart, bar chart, etc.
A bar graph also known as a bar chart can be defined as the graphical representation of data (informations) by using vertical columns or rectangular bars. When a data set is observed, a bar chart can be used to graphically represent or record the total or overall amount of information contained therein. Generally, bar charts are used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.
Answer:
A graph
Explanation:
Took the quick check xd :)
is there difference between aqueous channel and aquaporin?
Answer:
Pathways by which water can cross a membrane lipid bilayer. Water can diffuse slowly across the bilayer between the lipid molecules (shown in blue). ... In contrast, water traverses the membrane much more rapidly through aqueous channels (aquaporins - shown in brown), and this process is much less temperature-sensitive.
Explanation:
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20 POINTS
In the _____ the virus can reproduce so rapidly that it causes the cell membrane to disintegrate.
a lysogenic
b lactic
c lymphatic
d lytic
In the lytic cycle, the virus introduces its genome and replicates after that it assembles a new virus body and ruptures the cell membrane, hence option d is correct.
What are the lytic and lysogenic cycles?In a lytic cycle, the virus transfers its genome into a host cell and starts replication by seizing control of the host's cellular machinery.
When the infection is finished, the host cell is lysed, releasing the freshly duplicated and assembled virus particles into the surrounding waters.
The virus replicates by integrating its genome with the genome of the host cell during the lysogenic cycle, which is also known as a non-virulent infection.
Therefore during the lytic cycle, the virus-cell membrane is disintegrate and the lysogenic cycle happens without killing the host, hence option d is correct.
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What is the main source of energy for the world
The amount of nitrogen in the atmosphere is affected by:
A) sewage treatment plants
B) inorganic nitrogen fertilizers
C)pollution from factories
D)all of the above
which statement about the Aqua culture industry in the US is true
Answer:
The true statement about the aquaculture is that It means “cultivating small acreages of land.”
In the last 100 years, the average surface temperature of the Earth has risen by about ____________ degree Fahrenheit and could increase by another one to four degrees in the next 50 years.
Using the codon chart above, give one start codon and one stop codon. *
Answer:
start codon AUG
stop codon UGA