when did NASA begin collecting satellite data on Arctic sea ice?

Genetic variation is defined as the change in the genetic sequence of an organism of species. The genetic variation can be due to natural selection or mutation.

The correct answer is:

Option C. DNA polymerase errors during replication

Genetic variation can be caused by mutation. The mutation is the alteration of a genetic sequence, by inserting or deleting the nucleotide. The mutation can lead to the entry of a new allele in a population.

The chances of genetic variation in a population are most likely due to errors made by DNA polymerase during replication.

DNA replication is an essential process in which genetic material from the parent is transmitted to the daughter cell. However, the mutation or errors caused during the replication will lead to genetic variation.

Therefore, Option C is correct.

To know more about genetic variation, refer to the following link:

https://brainly.com/question/848479

DNA polymerase errors during replication (option c) are most likely to create heritable genetic variation in a population due to changes in the DNA sequence that can be passed on to daughter cells.

The option most likely to create genetic variation in a population is c. DNA polymerase errors during replication. Errors made by DNA polymerase during DNA replication can lead to changes in the DNA sequence of the replicated DNA. These errors are a source of genetic variation because if they are not repaired, they become part of the genetic code in the daughter cells. It is important to note that while other options might involve errors in genetic processes, they usually do not result in heritable genetic variation. For example, errors made by RNA polymerase during transcription or by tRNA during translation generally affect only one molecule of mRNA or one protein, respectively, rather than the DNA that will be passed on to the next generation.

Furthermore, the semi-conservative mode of replication of DNA, as well as the proofreading and fixing of mistakes by Polymerase I and II, help ensure that errors during DNA replication are generally rare events.

Answer:they need an active host

Explanation:

Answer:

Viruses need a host to survive.

Explanation:

They are categorized under parasitism to the host.

Answer:

1. b

2. c

3. d

Explanation:

The bird-rhino relationship is an example of mutualism.

Mutualism is a type of symbiotic relationship where all species involved benefit from their interactions. While mutualism is highly complex, it can be roughly broken down into two types of relationship.

Mutualism describes the ecological interaction between two or more species where each species has a net benefit. Mutualism is a common type of ecological interaction.

Mutualisms occur in every aquatic and terrestrial habitat; indeed, ecologists now believe that almost every species on Earth is involved directly or indirectly in one or more of these interactions.

Learn more about mutualism:

https://brainly.com/question/16945068

#SPJ5

Answer: seedling

Explanation: took test got 100%

can you please give brainliest or heart

As a seed plant germinates, the new plant is called a(n) seedling, after the leaves first open.

After the leaves first open, the new plant is termed a "seedling." This phase marks the early stage of growth after germination, where the plant begins to establish itself above the soil surface. Seedlings typically possess embryonic leaves, or cotyledons, which initially provide nutrients to support early growth until true leaves develop. These true leaves are the first set of foliage that emerge after the cotyledons and represent the plant's ability to undergo photosynthesis independently.

During the seedling stage, the plant undergoes rapid growth as it acclimates to its environment, develops its root system, and strengthens its stems and leaves. Seedlings are vulnerable to environmental factors such as temperature fluctuations, water availability, and competition from neighboring plants or pests.

Proper care during this phase, including adequate watering, sunlight exposure, and protection from adverse conditions, is essential for promoting healthy seedling growth and ensuring successful establishment into mature plants.

Answer:

During the Cambrian explosion approximately 535 to 525 million years ago, 2. animals rapidly diversified in the oceans

Explanation:

Scientists have the theory that the Cambiran explosion, approximately 535 to 525 million years ago, was possible because of complex predator-prey relationships and increased atmospheric oxygen levels. All this situation promoted animal diversification. Thinking about evolution, animals directly evolved from protists.

Answer:

The correct answer is option E) "incubation and convalescence".

Explanation:

The incubation period of an infectious disease is defined as the lapse between when a person is infected and the first symptoms are onset. While the convalescence stage is defined as the gradual recovery that a person experience once she or he overcomes the infectious disease. In both, the first and the last stage of the infectious disease (incubation and convalescence, respectively) the patient does not experience signs or symptoms of the disease.

Marine biologists study biological oceanography and the associated fields of chemical, physical, and geological oceanography to understand marine organisms.

Marine science recreates key role in the ongoing search to understand our world and to control its resources.

The interdisciplinary nature of the Marine Science curriculum will organise students to analyze deeply such co occuring issues as environmental alter, human clashes on the ocean, and biodiversity.

Thus, Marine biology is the study of marine organisms, their behaviors and relation with the environment.

To learn more about marine science click here:

https://brainly.com/question/23558033

#SPJ2

Answer:

Option B, increasing the number and size of mitochondria

Explanation:

Mitochondria (power house of a cell) produce energy. When no exercise is done, the productivity of mitochondria reduces but it increases with regular exercise. In fact aerobic training helps mitochondria in making more energy by enhancing its efficiency. With one cycle of exercise, mitochondria produce 32 ATPs. Aerobic exercise allows more of oxygen to get to the muscle cells, the faster it happens the more energy is produced  

Hence, option B is correct

Answer:

B, increasing the number and size of mitochondria

Explanation:

Answer:

EtBr inserts between the stacked bases in the DNA double helix.

Explanation:

Answer:

I think it's A correct me if am wrong am not that smart am sorry if am wrong

Answer: Because the heart model is always in anatomical position. It is always based on the patient.

The left atrium and left ventricle are shown on the right side of the diagram because it is a frontal section of the heart, which presents the heart as if it were cut in half from front to back.

The left atrium and left ventricle are shown on the right side of the diagram because the diagram is a frontal section of the heart, which means it shows the heart as if it were cut in half from front to back. In this view, the left side of the heart is on the right side of the diagram and vice versa.

https://brainly.com/question/32486418

#SPJ3

Options for the question have not been provided. They are as follows:

(1) DNA in muscle cells

(2) base sequences in liver cells

(3) genes in an egg cell

(4) number of chromosomes in a fetal bone cell

Answer:

(3) genes in an egg cell

Explanation:

Evolution is the change in characteristics of a species which it develops over the time. These changes can be a result of natural selection, genetic drift, founder effect etc. They are passed from one generation to another hence the alleles for them get fixed in the population.

For evolution to occur, change should take place in germ cells. Germ cells are the one which fuse to form the organisms of next generation. If there is a change in their genes, it would also appear in next generation, unlike changes in genes of somatic cells. Since egg cell is a germ cell it is the correct answer.

Answer:

genes in an egg cell

Answer:

Speciation was allopatric or peripatric, but would depend on the number of individuals that dispersed from the original populations.

Explanation:

The new species can be formed in one of the three ways that are allopatric, peripatric, and parapatric speciation.

The allopatric speciation gives rise to new species due to the geographical barriers present between them and the peripatric speciation occurs when a small population enters into a new habitat.

In the given question, species A is more closely related to species B as to species C. This could be due to the allopatric speciation or peripatric speciation but it would depend on the number of the individuals of the population that dispersed to a different elevation which provided a new niche.

Thus, the selected option is correct.

Answer:

It wouldn't be able to survive

Explanation:

If the pH goes up than the coral reefs wouldn't be able to live and if they can't live there then there wouldn't be any life. There wouldn't be shelter for the fish and if there is no fish then the ecosystem would collapse.

A warming ocean: causes thermal stress that contributes to coral bleaching and infectious disease. Sea level rise: may lead to increases in sedimentation for reefs located near land-based sources of sediment. Sedimentation runoff can lead to the smothering of coral.

Bleaching leaves corals vulnerable to disease, stunts their growth, affects their reproduction, and can impact other species that depend on the coral communities. Severe bleaching kills them.

The rising acidity of the oceans threatens coral reefs by making it harder for corals to build their skeletons. A new study details how ocean acidification affects coral skeletons, enabling scientists to predict more precisely where corals will be most vulnerable.

To learn more about Caribbean coral reefs, refer

https://brainly.com/question/25444139

#SPJ2

Answer: b. Primordial soup origin hypothesis

Explanation:

The primordial soup hypothesis is the basis of the origin of life on earth. Life originated in the ocean water as a result of the combination of chemicals from the atmosphere and energy from the sun to make up the amino acids. The amino acids are the building blocks of proteins. The protein was the basis of the development of life forms and their evolution on planet earth. The chemical evolution supposed to occur at least 3.8 billion years ago.

Answer:

coevolution.

Explanation:

A series of reciprocal evolutionary adaptations in two species is called _____. coevolution.

Answer:

Answered below

Explanation:

Carbohydrates are biomolecules that contain hydrogen, carbon and oxygen. They are generally structured as a chain of carbons with hydroxyl groups, and ketones or aldehydes. The subtypes include;

Monosaccharides

Disaccharides

Polysaccharides

Monosaccharides are generally represented by the formula CH2On. They are classified based on the number of carbon atoms they have. Example, hexoses have 6 carbon atoms, pentose, 5, diose, 2 etc. They are also classified based on whether they have ketones or aldehydes. Examples of monosaccharides are glucose and fructose.

Disaccharides are formed when two monosaccharides form glycosidic bond through a dehydration reaction. Examples of disaccharides include; maltose, lactose, and sucrose which is made up of glucose and fructose. An oligosaccharide is made up of 2-10 monosaccharides and are often components of glycoproteins or glycolipids.

Polysaccharides, also called complex carbohydrates are long-chain carbohydrates made of repeated monosaccharides linked by glycosidic bonds. Examples are starches and glycogen.

Answer:

The fossil is 17,100 years old.

Explanation:

The decay equation:

[tex]\frac{dN}{dt}\propto -N[/tex]

[tex]\Rightarrow \frac{dN}{dt}= -\lambda N[/tex]

[tex]\Rightarrow \frac{dN}{N}= -\lambda dt[/tex]

Integrating both sides

[tex]\Rightarrow \int\frac{dN}{N}= \int-\lambda dt[/tex]

[tex]\Rightarrow ln |N|=-\lambda t+c[/tex]

When t=0, N=[tex]N_0[/tex] = initial amount

[tex]ln |N_0|=-\lambda .0+c[/tex]

[tex]\Rightarrow ln |N_0|=c[/tex]

[tex]\therefore ln |N|=-\lambda t+ln|N_0|[/tex]

[tex]\Rightarrow ln |N|-ln|N_0|=-\lambda t[/tex]

[tex]\Rightarrow ln |\frac {N}{N_0}|=-\lambda t[/tex]

[tex]\Rightarrow \frac {N}{N_0}=e^{-\lambda t}[/tex]

[tex]\Rightarrow N=N_0e^{-\lambda t}[/tex]

The decay equation is

[tex]N=N_0e^{-\lambda t}[/tex]

Given that,

The half life of carbon - 14 is 5700 years.

For half life, [tex]N=\frac{1}{2} N_0[/tex]

To find the value of  [tex]\lambda[/tex], we need to put the value of N and t in the decay equation.

[tex]\frac12N_0=N_0e^{-\lambda \times 5700}[/tex]

[tex]\Rightarrow \frac12=e^{-\lambda \times 5700}[/tex]             [ Divided [tex]N_0[/tex] both sides]

Taking ln both sides

[tex]\Rightarrow ln| \frac12|=ln|e^{-\lambda \times 5700}|[/tex]

[tex]\Rightarrow ln| \frac12|={-\lambda \times 5700}[/tex]

[tex]\Rightarrow \lambda= \frac{ln| \frac12|}{-5700}[/tex]

[tex]\Rightarrow \lambda= \frac{ln|1|-ln|2|}{-5700}[/tex]             [ [tex]ln|\frac mn|= ln |m|-ln |n|[/tex]]

[tex]\Rightarrow \lambda= \frac{ln|2|}{5700}[/tex]                      [ln 1= 0]

The fossil has only 12.5% of the carbon carbon-14 that it would have had originally.

So, [tex]N=\frac{12.5}{100} N_0[/tex]

Then,

[tex]\frac{12.5}{100} N_0=N_0e^{-\frac{ln|2|}{5700}t[/tex]

[tex]\Rightarrow \frac{12.5}{100} =e^{-\frac{ln|2|}{5700}t[/tex]

Taking ln both sides

[tex]\Rightarrow ln|\frac{12.5}{100} |=ln|e^{-\frac{ln|2|}{5700}t}|[/tex]

[tex]\Rightarrow ln|\frac{12.5}{100} |={-\frac{ln|2|}{5700}t}[/tex]

[tex]\Rightarrow t=\frac{ ln|\frac{12.5}{100}|} {-\frac{ln|2|}{5700}}[/tex]

[tex]\Rightarrow t=\frac{ ln|\frac{12.5}{100}|\times 5700} {-{ln|2|}}[/tex]

[tex]\Rightarrow t=17,100[/tex]

The fossil is 17,100 years old.

Nuclear fusion is essential in a star's life cycle, as it provides energy through the fusion of hydrogen into helium during the main-sequence phase and leads to the creation of heavier elements as the star ages and potentially explodes as a supernova.

Nuclear fusion plays a critical role in the life cycle of a star, providing the energy necessary for a star to shine and influencing its evolution. During the main-sequence stage, which a star spends most of its life in, hydrogen nuclei (protons) fuse together to form helium in the core of the star. This process, known as the proton-proton cycle, occurs at extreme temperatures and pressures, as in our sun's core which is about 14 million kelvin. The nuclear fusion of hydrogen into helium releases a substantial amount of energy, which maintains the star's luminosity and supports it against gravitational collapse.

As a star exhausts the hydrogen in its core, it undergoes various changes - for example, it may expand to become a red giant. Eventually, depending on its mass, it will fuse heavier elements and may end its life in a supernova explosion, contributing newly created elements to the cosmos, including those heavier than iron.

Thus, nuclear fusion not only keeps stars shining but also produces new elements, contributing to the chemical diversity of the universe.

Answer:

Explanation:

Im not 100% sure, but I think that because the snake venom gets stronger, other species that have adapted to the weaker venom have a harder time fighting it. For example, the honey badger can fight of snake venom with its very thick skin and ability to sleep it off. However, if the snake venom got stronger/deadlier, the honey badger would have a much harder time fighting it, and might die.

Gene duplication has made the snake venom deadlier over time had a positive impact on the snakes. This is because this resulted into more production of venom.

Gene duplication is a type of mutation. In this process, a region of DNA coding for a gene is copied twice. Gene duplication can occur as the result of an error in the recombination during meiosis or through a retro-transposition event in the gene. Duplicate genes are often immune to the selective pressure under which the genes normally exist.

Gene duplication is the common mechanism of evolution which is thought to be followed by natural selection for adaptive traits in a species. The adaptations produced through this process include the production of venom more toxic to specific prey in several lineages, proteins that pre-digest prey, and also a method to track down prey population after a bite.

Learn more about Mutations here:

https://brainly.com/question/17130462

#SPJ5

Answer:

Explanation:

1. Active transport is the transport of molecules, in that the particles move across a membrane from a region of lower concentration to a the region of higher concentration with the help of energy.

2. Active transport is the energy-requiring process and results in the transportation of molecules and ions across membrane against a gradient called uphill transport.  

3. Example: The Sodium-Potassium pump.

Answer:

She mentions that more than ninety percent of the big fish in the ocean have been fished and eaten. That almost half of the coral reefs are dying and disappearing. She also mentions how oxygen levels are decreasing causing the ecosystem and wildlife to die.

*WARNING*

Do not copy this word for word as you'll be caught for plagarism!

Explanation:

The first minute of the talk:

"I want to share with you my personal view of changes in the sea that affect all of us, and to consider why it matters that in 50 years, we've lost -- actually, we've taken, we've eaten -- more than 90 percent of the big fish in the sea; why you should care that nearly half of the coral reefs have disappeared; why a mysterious depletion of oxygen in large areas of the Pacific should concern not only the creatures that are dying, but it really should concern you. It does concern you, as well."

Final answer:

Human activities over the past 50 years have led to significant changes in the oceans, including sea-level rise, decrease in fish populations, ocean acidification, introduction of non-native species, and pollution and habitat destruction.

Explanation:

Human Impacts on the Oceans

In the past 50 years, human activities have significantly altered the oceans. Some of the changes include:

These are just a few examples of the human impacts on ocean ecosystems, illustrating the urgent need for conservation and sustainable management of ocean resources.

The specific type of energy transformation that takes place during photosynthesis is Solar energy to Chemical energy (Option A).

Photosynthesis is a series of chemical reactions by which plant cells and algae use the energy from the sun (sunlight) to produce simple carbohydrates (i.e., sugars).

Photosynthesis needs oxygen, water (H2O) and sunlight or solar radiation to produce glucose (sugar) and carbon dioxide (CO2).

In conclusion, the specific type of energy transformation that takes place during photosynthesis is Solar energy to Chemical energy (Option A).

Learn more about photosynthesis here:

https://brainly.com/question/19160081

#SPJ1

Answer:

Prostate gland is a main organ of reproductive system in male. Its main function is to secretes liquid substances in order to maintain health of sperm.

Explanation:

Prostate gland is present between two main organs of reproductive system i. e. bladder and penis. Its size is small equal to the size of walnut. The main function of prostate gland is to secretes prostate liquid. This liquid is the main part of semen.

Answer:

The prostate gland is just in front of the rectum. The urethra runs through the center of the prostate, from the bladder to the penis, letting urine flow out of the body.The prostate gland is a male reproductive organ whose main function is to secrete prostate fluid, one of the components of semen. The muscles of the prostate gland also help propel this seminal fluid into the urethra during ejaculation.

Explanation:

The prostate, a small muscular gland, produces an important fluid that transports sperm and keeps them safe.The prostate only appears in males. It secretes a fluid that keeps sperm alive and the genetic code they carry.

The prostate contracts and ejaculates its fluid into the urethra.   During ejaculation, sperm travels along two tubes called vas deferens, they carry millions of sperm from the testes (where they are made) to the seminal vesicles. The seminal vesicles are attached to the prostate and add extra secretions to the semen before it is sent down the urethra. The prostate contracts during ejaculation, closing off the opening between the bladder and urethra and pushing semen through at speed.

To function properly, the prostate needs androgens (male hormones), such as testosterone and dihydrotestosterone (DHT).

Answer:

AA

Explanation:

A true breeding organism for a particular trait is an organism that would produce progeny  with the same trait whe self fertilized.

Hence, since axial flower is represented by the allele A, a true breeding flowering plant will have the genotype AA.

Axial flower (A) is dominant over terminal flower (a).

True-breeding axial flowering plant will have the genotype AA.

True breeding terminal flowering plant will have the genotype aa.

AA is crossed with aa.

AA   x   aa

offspring: Aa, Aa, Aa and Aa.

All the offspring will exhibit axial flowering.

Answer:

The correct answer is option C. "Uncovered meat that had contact with air".

Explanation:

In 1668, the Italian scientist Francesco Redi performed a celebrated experiment to prove that maggots are not spontaneously created by placing fresh meat in each of two different jars: one opened and one covered with a cloth. Redi used an uncovered meat that had contact with air as a control, expecting that flies will come in and the maggots will be developed as they do in nature.

Answer: C

Explanation:

Im smart

Answer:

deoxyribonuclei acid ,DNA

Explanation:

the chromosome is wrapped around the DNA

Chromosomes are coiled structures made of DNA and proteins called histones, essential for packaging genetic information. They contain genes that code for proteins and are condensed for transport during cell division.

Chromosomes are the structures within the nucleus of cells that carry genetic information. They are made of DNA that is tightly coiled around proteins called histones, forming a complex known as chromatin. During cell division, this chromatin condenses further to form the classic chromosome structure that is then transported to daughter cells.

These structures not only play a crucial role in genetics by containing genes, which code for proteins, but they also ensure the DNA is compact enough to fit within the nucleus of our cells. Human cells typically contain 46 chromosomes, consisting of 23 pairs, with one set inherited from each parent.

The tightly packed DNA around histone proteins can be envisioned as beads on a string with the 'beads' representing nucleosomes, a basic unit of DNA packaging. This packaging allows for efficient organization and safeguarding of genetic information during cell division and other cellular processes.