Answer:
Evolution has occurred thanks to many random changes in the DNA base sequence that we call mutations. This is caused by errors in the genetic information contained in the cells - due to chemical or physical factors - and also its subsequent propagation by replication, being transcendent for evolution those that will later be transmitted to the offspring: somatic cells if reproduction it is asexual and the gametes if it is sexual. For this reason, we say that mutations are the primary source of gene variability, essential for evolution to exist. Thus, without mutations, the genetic variability that natural selection needs would not be present - in addition, such diversity is important for the population to more successfully mold (or adapt) to continuous environmental changes.
Explanation:
A mutation is a change in the information contained in the DNA of cells. The DNA of an organism influences all aspects of its life. Therefore, a change in the DNA of an organism can produce changes in all aspects of its life. The mutation increases the genetic variability of the species and contributes to the adaptation of the species to the environment and to their evolution. Viability and fertility are associated with adaptation, the total capacity of an organism to survive and reproduce. The effect of a mutation in any generation is minimal, but over time a considerable amount of variation from mutations can accumulate. Most mutations are harmful and their carriers die, but those that produce an improvement remain in the species and are essential in the evolutionary process. When mutations appear in a certain population, the genotype changes from generation to generation, appearing individuals with characteristics different from those of their predecessors. This is how the population evolves, being able to originate new species. Mutations that are detrimental to the carrier individual will be eliminated by natural selection.
What reacts with sulfur dioxide in
the atmosphere to form acids that
return to the surface as either dry
or wet deposition?
Answer:
Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.
What structure encloses almost all bacteria? Do bacteria have a structure that encloses the genetic material?
explain how pH and temperature can affect enzyme activity
Please help has to be due in 20 mins. Thank you for helping me.
Answer:
Enzyme activity depends on many factors such as Substrate concentration, enzyme cofactor, enzyme inhibitors, pH, and temperature. pH and temperature are two important factors that directly affect the activity of an enzyme as follows:
1. pH
Each enzyme has the specific optimal pH that allows it to perform its function to its fullest. The enzymes are the protein made up of the interaction of the hydrogen bond in the side chain of the protein. if there is any change from optimum pH, the enzyme activity decreases until it stops working.
2. Temperature:
Each enzyme has its own optimal temperature. Any modification or change in temperature results in the activity of an enzyme, and it also leads to the denaturation of an enzyme as it is made up of protein.
the chief purpose of the photosynthetic process is considered to be the
ANSWER QUICK!!
One of the bacteria in Model 1 has a tail-like structure.
a) What is the structure called?
b) What might be the purpose of this structure?
c) Based on your answer of the previous question, what might you infer about the absence of this structure in the other two bacteria cells?
From the bacterial model:
(a) the tail-like structure is known as the flagellum (plural, flagella)
(b) The primary function of the structure is to aid movement. It is moved in a whip-like version to propel the organism.
(c) Based on the absence of of flagellum in the other two bacteria, it means that they are not motile.
The presence of flagellum in bacteria is an indication that such bacteria are motile. The thread-like structure is whipped randomly in order for the organism to move and the absence of it in an bacterium is an indication that such a bacterium is not motile.
More on bacterial motility can be found here: https://brainly.com/question/23021688
How would Earth be different without the greenhouse effect?
A. There would be more solar energy reaching Earth.
B. There would be more ice on Earth's surface.
C. The oceans would contain more carbonic acid.
D. The atmosphere would contain more methane.
is being left handed dominant or recessive
Answer:
recessive
Explanation:
Some scientists have reported that handedness is due to a single gene with right handedness dominant and left handedness recessive.
I hope that this helped you :D
What is the chemical symbol of Hydrogen?
Answer:
the symbol for hydrogen is H
Which of these does Not occur during mitosis.
1. Separation of chromatids
2. Dissolving of the nuclear envelope
3. Division of the cytoplasm
4. Formation of chromosomes
Answer:
I'm not sure, but I think it's 4
Please put the following steps of viral infection in order.
The virus recognizes and binds to a host cell via a receptor molecule on the cell surface.
New viral particles are assembled from the genome copies and viral proteins.
The virus or its genetic material enters the cell.
Completed viral particles exit the cell and can infect other cells.
The viral genome is copied and its genes are expressed to make viral proteins.
Answer:
The virus recognizes and binds to a host cell via a receptor molecule on the cell surface.
The virus or its genetic material enters the cell
The viral genome is copied and its genes are expressed to make viral proteins.
New viral particles are assembled from the genome copies and viral proteins.
Completed viral particles exit the cell and can infect other cells.
Which of the following biological processes releases oxygen into the
atmosphere?
A. Transpiration
B. Paristalsis
C. Respiration
D. Photosynthesis
Answer:
D. Photosynthesis.......
A bird that can easily out complete other birds for its food and that can produce many eggs has high what?
Answer:
Fitness or aptitude
Explanation:
Aptitude (or fitness) is the genotype/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 puts together everything that matters in natural selection. Includes the survival capability, finding a mate partner possibility, producing fertile descendants, and leaving the genes to the next generation. The aptitude of a genotype must be significant for natural selection to act in its favor.
What common breeds get affected by gastrotomy?
Answer:
Great Danes, greyhounds and german Shepherds
Explanation:
GDV tends to effect deep chested dog breeds
How do you think Nucleic Acids and Proteins work together in the body? Why are they both important to humans?
Explanation:
protein is the element responsible for building up of cells and the nucleic acid is embedded in the cell, so protein builds the whole cell including the nucleic acids.. the nucleic acid is also packed by histones which is a proteinous structure. both are important because, in the cell all organelles require protein for their growth and likewise the encoding of the genetic information carrier
explain reproduction in hydra
Answer:
Budding
Explanation:
The common asexual method of reproduction by hydras is budding. Buds originate at the junction of the stalk and gastric regions. The bud begins as a hemispherical outpouching that eventually elongates, becomes cylindrical, and develops tentacles. The bud then pinches off and a new individual becomes independent. Buds are produced every two to three days under favorable conditions. Following unfavorable conditions, such as injuries or periods of scarce resources, hydras occasionally reproduce through transverse and longitudinal fission.
Which step is meiosis is shown in the image below ?
Anaphase I of meiosis in shown in this image.
What do you mean by meiosis?Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, such as sperm or egg cells.
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females.
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase.
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Illness or condition that negative affects my organ
System
Answer:
some illnesses that can affect your organ system are heart disease, asthma, and cancer
Answer:
Autoimmune hepatitis, Graves' disease, type 1 diabetes, and Cystic fibrosis.
Explanation:
what is the central feature of the cell cycle
Answer:
The central components of the cell-cycle control system are cyclin-dependent protein kinases (Cdks), whose activity depends on association with regulatory subunits called cyclins. Oscillations in the activities of various cyclin-Cdk complexes leads to the initiation of various cell-cycle events.
Explanation:
What is a learned behavior?
A behavior passed down from parents
A behavior shaped by the environment
A behavior that develops naturally
A behavior that helps an organism camouflage
A learn behaviour is a type of a behaviour shaped by the environment.
What is learned behaviour?Learned behaviour can be defined as the type of behaviour where by an organism develops a new way of living through life experiences from its environment.
Therefore, a learn behaviour is a type of a behaviour shaped by the environment.
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Anybody please helppppppp!!!
It’s a gizmos science assignment due tmrw!!
T or F _ Cytosine, guanine, thymine and adenine are referred to as phosphates.
T or F DNA is in the shape of a helix.
A nucleotide is made up of a suqar, phosphate and two nitrogen bases.
Replication is performed prior to cell division.
Adenine always pairs with quanine.
Complementary base pairing matches up complementary sugars.
T or F _The sides of the DNA molecule are made up of repeating nitroqen bases and suqars.
The letters that make up the DNA molecule code for qenes.
T or F _ Replication results in two strands of DNA, each of which has half of the oriqinal strand.
T or F Covalent bonds hold nitrogen bases together, forming the rings of the DNA ladder.
Answer:
f t f t t t f ? t f
Explanation:
Cytosine, guanine, thymine and adenine are NOT referred to as phosphates (they are nitrogen bases), whereas DNA is in the shape of a double helix'.
A nucleotide is made up of sugar, phosphate and a nitrogen base.The replication is performed after cell division.Adenine always pairs with thymine, whereas cytosine pairs with guanine.Complementary base pairing matches up nitrogen bases.The letters that make up the DNA molecule code for genes.Replication results in two strands of DNA, each of which has half of the original strand.Hydrogen bonds hold nitrogen bases together, forming the rings of the DNA ladder.In conclusion, Cytosine, guanine, thymine and adenine are NOT referred to as phosphates (they are nitrogen bases), whereas DNA is in the shape of a double helix.
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What do you think some person don’t have traits
Answer:
Why do you think some people don't have traits.
Well everyone has traits that are inherited by their parents.
Explanation:
Ex. Punnet squares
But some people do not have mutations if that is what you are asking, (although it is very very rare)
Hope it helps :)
What effect does burning fossil fuels during manufacturing and energy production have on outdoor air pollution?
Answer:
It causes global warming as well as air pollution.
Explanation:
Burning of fossil fuels has adverse effect on outdoor air pollution because when the fossil fuels burns carbondioxide gas is released in the atmosphere. Carbondioxide gas is a greenhouse gas which is released in the atmosphere through burning of fossil fuels and is responsible for increasing air pollution. This increase in carbondioxide gas leads to global warming due to blockage of solar radiation that is reflected from the earth surface.
What are the two most common sources for rivers and streams?
Answer:The source of a river or stream may be a lake, a marsh, a spring, glacier, or a collection of headwaters. The furthest stream is called the headstream. Headwaters are small streams that create the river or stream and may be cool waters, because of shade and barely melted ice or rain.
Explanation:I did this in class 2 days ago LOL
Answer:
The source of a river or stream may be a lake, a marsh, a spring, glacier, or a collection of headwaters. The furthest stream is called the headstream. Headwaters are small streams that create the river or stream and may be cool waters, because of shade and barely melted ice or rain.
Explanation:
Hope this helped you :D
T
A
A
C
G
C
A
G
What is the order of bases that will compliment this side of a DNA strand
Answer:
A, T, T, G, C, G, T, C
Explanation:
A becomes a T
T becomes a A
C becomes a G
G becomes a C
Describe at least three ways in which viruses, bacteria, protists, or fungi are important in your daily life.
Answer: hem living in and on your body that are beneficial to you. ... heating it to at least 71.6°C for only 15 s. ... List three ways fungi are important to the environment.
Explanation:
i need help with this please
Answer:
12: curly wings
13: normal wings
14: normal wings
for the last three the data would look like AA, Aa, aa
Also let me tell you this as a junior in high school this year of science is the easiest thing ever
Explanation:
Fossils are often hardened remains of organisms that once lived, such as a bone or tooth. Which characteristic of sedimentary rock makes
it likely for fossils to be found in this type of rock?
A. An organism's remain become hardened when covered by melted rock.
B. Organisms are changed into rock by high temperature once they are no longer living.
C. The remains of organisms are buried under layers of sand, shells, and bits of rock.
D. The bones of an organism are pulled below Earth's surface during an earthquake.
Answer:
C as most fossils are created in the ocean
Explanation:
If i'm wrong please tell me if i'm right please mark me brainliest
The roots growing down is an example of _______________
A. positive geotropism
B. negative geotropism
C. Phototropism
D. Thigmotropism
Answer:
positive geotropism
Explanation:
The answer is positive geotropism
In a food chain, energy moves from producer to herbivore or
and then on to other consumers.
Answer
energy
food web
omnivore
all of the above
Answer:
To other consumers.