the adoption of very similar streamlined body shapes by both sharks and dolphins provides evidence for? 1. cross-breeding
2. life originating in the oceans
3. convergent evolution
4. genetic mutations

Answer:

The best example of environmental influence that would most likely result in natural selection is that a food resource disappears in a pond, and some frogs in a population can eat the remaining food resource, while others cannot.

Explanation:

Among the environmental factors that can influence natural selection at a given time is the availability of food. Natural selection, from the point of view of evolution, is influenced by adverse environmental conditions, being food shortage one of them.

In conditions of food shortage in a pond, as in the example of the frog population, only the most apt will be able to take advantage of nutritional resources, while the less apt will not be able to survive. The ability to survive with little food available becomes an inherited trait that will be passed on to future generations.

In any case, tolerance to adverse conditions becomes adaptation, which translates into survival and reproductive success.

Answer:

food resource disappears in a pond, and some frogs in a population can eat the remaining food resource, while others cannot.

Explanation:

The pairing of complementary strands of DNA due to hydrogen bonding is called semi-conservative replication.

The biological process of creating two identical copies of DNA from a single original DNA molecule is known as DNA replication.  All living things replicate their DNA, which is the primary mechanism for biological inheritance. This is necessary for:

A double helix (two linear strands that run counterclockwise and twist together) of two complementary strands makes up DNA.

These strands are split apart in the replication process. The mechanism of semiconservative replication uses each strand of the original DNA molecule as a template to create its counterpart. The new helix will be made up of an original DNA strand as well as a freshly synthesized strand as a result of semi-conservative replication.

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Answer:

The correct answer is "Yamnaya".

Explanation:

In genetics, a population or genetic bottleneck is defined as a reduction on the size of a population as a result of an environmental effect or human intervention. Regarding the Y chromosome bottleneck, the Yamnaya is an ancient population that contributed the most due to its sex-biased and stratified culture. The Yamnaya were violent and left behind many male skeletons, where just few type of persons were able to reproduce.

Answer:

we need to see the picture

Explanation:

ask the question again and show the picture so i can answer it for you :)

Answer:

Evaporation is where the water is coming out of the ocean up into the air.

I think that is rain happening above the mountain? If so, that is precipitation.

The little river thing coming out of the mountain is runoff.

Explanation:

Answer:

X-ray

Explanation:

X-rays show an outline of the heart;

Situs inversus is when the organs are all on the opposite side of the body compared to normal;

The heart, therefore, will be found on the right than the left;

This would be visible on an x-ray

Answer:

I can confirm that c aka cartilage is the right answer if it is right pls like ty

Explanation:

The correct answer is In a recessive disorder, only a single functioning allele is necessary to determine a normal phenotype. The set of characteristics or features that can be observed in an organism is referred to as its phenotype in genetics.

The expression references to the morphology, or physical shape and structure, of an organism as well as to its physiological and biochemical characteristics, behavior, and outcomes of that behavior. An organism's genotype, or how its genetic code is expressed, and the impact of its environment are the two primary determinants of its phenotype. There is a chance that both variables will interact, which would further affect phenotypic. If there are two or more distinct phenotypes of a species coexisting in the same population, that species is said to be "polymorphic."

The complete question is:

Select the correct explanation for the fact that a carrier of a recessive genetic disorder does not have the disorder.

a. The dominant allele for the gene determining the disorder represses protein production from the recessive allele.

b. In a recessive disorder, only a single functioning allele is necessary to determine a normal phenotype.

c. Affected individuals have recessive mutations, but a carrier has a dominant mutation.

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Answer:

negative 17/7

Explanation:

this is the answer

The characteristic that is not typical of annelids is D. asexual reproduction. Annelids are a phylum of segmented worms, and they possess certain distinct features:

A. True coelom: Annelids have a true coelom, which is a fluid-filled body cavity surrounded by mesodermal tissue. The coelom provides space for organs and allows for better movement and flexibility.

B. Segments: Annelids exhibit segmentation, with their bodies divided into repeated segments. This segmentation is evident externally and internally and allows for specialization and flexibility in movement.

C. Closed circulatory system: Annelids have a closed circulatory system, meaning that blood is contained within vessels and pumped by a muscular heart. This system facilitates efficient transport of oxygen, nutrients, and waste products throughout the body.

D. Asexual reproduction: Annelids primarily reproduce sexually through the exchange of gametes between individuals. While some annelids may have the ability to regenerate or reproduce asexually under certain circumstances, asexual reproduction is not a typical characteristic of the phylum. In summary, while annelids possess a true coelom, segmented bodies, and a closed circulatory system, asexual reproduction is not a common feature among them.

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Answer:

long chain of carbon and hydrogen

carboxyl group

The correct choices are - long chain of carbon and hydrogen and carboxyl group as fatty acid have long chains of hydrocarbons with carboxyl group makes it acid.

A fatty acid is an aliphatic chain with carboxylic acid that can be either saturated or unsaturated. Fatty acids make the lipid membrane with glycerols. A fatty acid consists of

Thus, the correct among the given choices are - long chain of carbon and hydrogen, a carboxyl group.

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If there is no rain, the Arizona poppy would not be able to perform the light-dependent reactions of photosynthesis.

Photosynthesis is a process that involves two main stages: light-dependent reactions and light-independent reactions.

Water is required in the light-dependent reactions to provide the electrons that are needed to generate ATP and NADPH, which are then used in the light-independent reactions to produce glucose.

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The correct option from the given question is option A) Freshwater is expected to decrease due to climate change.

Explanation:

Climate change refers to the long-term changes in the average weather patterns that have come to define Earth’s local, regional, and global climates. Climate change is primarily due to the increase in atmospheric concentrations of greenhouse gases (GHGs) produced by human activities, such as burning fossil fuels and deforestation.

Climate change has numerous consequences on the planet, including rising temperatures, sea level rise, increased frequency, and severity of extreme weather events, and changes in precipitation patterns, all of which have significant impacts on human societies and ecosystems.

Among the given options, freshwater is expected to decrease due to climate change. Climate change alters precipitation patterns, resulting in more frequent and severe droughts in some regions and increased flooding in others, resulting in water shortages. Higher temperatures and evaporation rates result in drier soils, which reduces water availability. These factors can reduce the amount of freshwater available for human consumption, agriculture, and other purposes.

A. Freshwater - all others increase

A drug that decreases the activity of an enzyme by binding to its active site is called a competitive inhibitor.

An inhibitor may bind to an enzyme and block the binding of the substrate, for example, by attaching to the active site. This is known as competitive inhibition as the inhibitor “competes” with the substrate for the enzyme. In other words, only the inhibitor or the substrate can be bound together at a given moment.

If an inhibitor is competitive, it will decrease the reaction rate when there's not enough substrate, but can be "out-competed" by lots of substrates. That is, the enzyme can still reach its maximum reaction rate given there is enough substrate. Accordingly, almost all the active sites of the enzyme molecules will get replaced by the substrate rather than the inhibitor.

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Yosemite Valley in northern California is a remarkable ecosystem that offers a range of invaluable ecosystem services. Firstly, its waterfalls play a vital role in regulating the water cycle, providing freshwater resources for both wildlife and human communities downstream.

Additionally, the diverse vegetation and forests within Yosemite Valley contribute to carbon sequestration, helping mitigate climate change by absorbing and storing carbon dioxide. The rock formations not only add to the aesthetic beauty but also provide habitat for a variety of species, supporting biodiversity and ecological balance.

Furthermore, the valley's ecosystems contribute to soil formation and nutrient cycling, enabling the growth of plants and sustaining the entire food web. Yosemite Valley is a popular tourist destination, attracting visitors from around the world

Its natural beauty and recreational opportunities generate economic benefits for local communities through tourism and outdoor activities. Overall, the ecosystem services of Yosemite Valley are essential for sustaining life, supporting biodiversity, regulating the environment, and enriching human well-being.

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The answer is True. When higher is the temperature of water, the faster an egg will cook.

Answer:lightning rod

Explanation:

Normaly there is a lighting rod to the most of the buildings or house so we can place lighting rod to prevent houses and buidlings from lightning

The particles of the substance initially had high Kinetic Energy.​

Gas particles move quickly in all directions and regularly collide with one another and the container's side. The particles gather kinetic energy and accelerate as the temperature rises. The particles' real average speed is influenced by their mass and temperature.

In liquids, particles are quite close together and move with random motion throughout the container. Due to the closer proximity of the particles, collisions between them happen more frequently than in gases even if particles are moving quickly in all directions.

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The difference is due to the inheritance pattern. Blood type needs two recessive alleles to express Rh-. Color-blindness needs only one.

⇒ Blood type is coded by a diallelic Rh gene that expresses complete dominance.

The allele Rh+ dominates over the allele Rh-.

Genotyopes and Phenotypes are as follows,

To express Rh-, a person must inherit two recessive alleles from their parents.

⇒ Color-blindness is an X-linked condition coded by a recessive allele.

As most sex-linked genes, it is transmitted together with the X chromosome.

The phenotype depends on the number of recessive alleles and the sex of the person.

Genotyopes and Phenotypes are as follows,

In this case, only one recessive allele is enough to express the affection.

In conclusion, Blood type needs two recessive alleles to express Rh-. Color-blindness needs only one recessive allele.

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Answer:

No, it is not possible to determine whether a plant has taproot or fibrous roots by looking at the impression of its leaf on a sheet of paper. This is because the root system of a plant is hidden underground and cannot be seen from the surface. The shape and size of a leaf can provide clues about the type of root system a plant has, but the impression of a leaf on a sheet of paper does not provide enough information to definitively identify the type of root system.

Explanation:

Answer:

B..........................

Explanation:

Answer:

False

Explanation:

I just took the quiz on Endginuty 2020

Answer:

false

Explanation:

just took the quiz

Answer:The ultimate source of all genetic variation is mutation. Mutation is important as the first step of evolution because it creates a new DNA sequence for a particular gene, creating a new allele. Recombination also can create a new DNA sequence (a new allele) for a specific gene through intragenic recombination.

Explanation:

The color of dog breeds can be black (BB or Bb) or brown (bb), and the ability to create pigment depends on the presence of the A gene (AA or Aa). The aa genotype results in no color (albino/white). Punnett squares can be used to predict the possible genotypes and phenotypes resulting from a cross between two dogs.

To determine the possible outcomes of a cross between two dogs, we can use a dihybrid Punnett square. Let's assume one dog is black (BbAa) and the other is brown (bbAA).

The Punnett square for the BbAa x bbAA cross would look like this:

 Bb    Ba

bb | Bbba | Bbaa

bb | bbba | bbba

From the Punnett square, we can see that there are four possible genotypes for the offspring: Bbba, Bbaa, bbba, and bbba. Among these genotypes, the Bbba and Bbaa genotypes will result in black-colored dogs, while the bbba and bbba genotypes will result in brown-colored dogs.

It's important to note that the presence of the A gene is necessary for color to be expressed, so the aa genotype would result in no color (albino/white) regardless of the B gene.

In summary, the use of a dihybrid Punnett square allows us to predict the possible genotypes and phenotypes of offspring resulting from a cross between dogs with different color and pigment gene combinations.

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Answer:

2 Hh- short-haired kitten

2hh- long-haired kitten

Explanation:

Parental phenotypes: long-haired short-haired

Parental genotypes: hh × Hh(second parent)

Genotypes of F1 generation: Hh, hh, Hh, hh

2 Hh- short-haired kitten

2hh- long-haired kitten

Answer:

C

Explanation:

In cycle sequencing technique, four distinctive fluorescently named dideoxyNTPs are utilized ( ddATP, ddGTP, ddCTP and ddTTP) notwithstanding ordinary dNTPs. each ddNTP marked with an alternate fluorescent color. Toward the finish of the experiment, the outcome yields various pieces of variable lengths each resulting in a solitary terminal fluorescent ddNTP towards the end.

Answer:

the answer for this is Osmosis.

Answer:

1. The mitochondria are responsible for producing energy in the form of ATP through cellular respiration.

2. Prokaryotic cells are smaller and do not have a nucleus or membrane-bound organelles, while eukaryotic cells are larger and have a nucleus and membrane-bound organelles.

3. Ribosomes are responsible for synthesizing proteins in the cell.

4. The endoplasmic reticulum is responsible for protein and lipid synthesis and transport within the cell.

5. Plant cells have cell walls, chloroplasts, and larger vacuoles, while animal cells do not have cell walls, chloroplasts, or large vacuoles.

6. The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport within the cell or for secretion outside the cell.

7. Lysosomes are responsible for breaking down and digesting waste materials and cellular debris within the cell.

8. The cytoskeleton is responsible for maintaining cell shape, providing support and structure, and facilitating cell movement and division.

9. Passive transport does not require energy and involves the movement of molecules from an area of high concentration to an area of low concentration, while active transport requires energy and involves the movement of molecules from an area of low concentration to an area of high concentration.

10. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

I hope these answers are helpful! Let me know if you have any more questions.

Answer:

1. The function of mitochondria in a cell is to produce energy in the form of ATP through cellular respiration. Mitochondria are also involved in other cellular processes such as apoptosis (programmed cell death), calcium signaling, and lipid metabolism.

2. Prokaryotic cells are smaller and simpler in structure than eukaryotic cells. Prokaryotic cells lack a nucleus and other membrane-bound organelles, while eukaryotic cells have a nucleus and various membrane-bound organelles.

3. Ribosomes are responsible for protein synthesis in a cell. They read the genetic code stored in messenger RNA (mRNA) and use it as a template to link amino acids together in the correct order to form a protein chain.

4. The endoplasmic reticulum (ER) is involved in protein synthesis, folding, and modification. It is also involved in lipid synthesis, calcium storage, and detoxification of drugs and toxins.

5. Plant cells have a cell wall, chloroplasts, and a large central vacuole, while animal cells lack these structures. Additionally, plant cells are typically larger than animal cells.

6. The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport to their final destinations. It consists of a series of flattened sacs called cisternae.

7. Lysosomes are involved in the breakdown of cellular waste and debris, as well as the degradation of damaged or unneeded cellular components. They contain enzymes that can break down various biomolecules such as proteins, lipids, and nucleic acids.

8. The cytoskeleton is a network of protein fibers that provides structural support to the cell, helps maintain cell shape, and enables cell movement and division. It is made up of three main types of fibers: microfilaments, intermediate filaments, and microtubules.

9. Passive transport is the movement of molecules across a cell membrane without the input of energy, while active transport requires the input of energy to move molecules against their concentration gradient. Passive transport includes diffusion, osmosis, and facilitated diffusion, while active transport includes primary and secondary active transport.

10. Osmosis is the diffusion of water across a selectively permeable membrane from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). It is a type of passive transport and is important for maintaining the water balance in cells.

Hope this helps!

The process of Glycolysis is a catabolic process  in which two molecules glucose goes through a ten- step pathway and yield two molecules of pyruvate . It is a major part of carbohydrate metabolism .

Mechanism Of Glycolysis

The glycolysis is also known as EMP pathway and it is involved in both aerobic and anaerobic conditions .There are two phases in the mechanism of glycolysis in which 5 reactions takes place in each phase and the process of glycolysis takes place in cytosol

Preparatory phase refers to the  generation of two molecules of  glyceraldehyde 3-phosphate from one molecule of glucose which further goes into the payoff phase . In this phase two molecules of ATP are used and two regulatory enzymes were involved in this reaction .

Payoff phase refers to the further break down of two molecules of glyceraldehyde3-phosphate to two molecules of pyruvate . In this phase four molecules of ATP and two molecules of NADH are generated . In this phase only one regulatory enzyme is involved which is the breakdown of PEP to pyruvate  .

Both the phases of glycolysis takes place in the cytoplasm and there are  three enzymes that involved in regulating the glycolytic pathway .This process is also known as the catabolic process .

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A substance requires energy to move across a membrane when it moves from (C) Low concentration to High concentration

The process of moving a substance across the cell membrane from high to low concentration is known as passive transport, which does not require energy. Active transport, on the other hand, is the process of moving a substance from low to high concentration, which requires energy.

The movement of molecules against their concentration gradient (low to high concentration) requires an energy source, which is usually in the form of ATP (adenosine triphosphate). Low concentration to High concentration. During active transport, the substance moves against its concentration gradient, which means it moves from an area of lower concentration to an area of higher concentration.

This process requires energy, which is provided by ATP. Active transport is responsible for the uptake of nutrients, such as glucose and amino acids, in cells. The process of active transport is crucial in maintaining the proper concentration of ions in cells. Additionally, active transport is essential for maintaining the pH of cells and the function of enzymes. Overall, active transport is an energy-intensive process that is vital for cellular homeostasis and function. The correct answer is C.

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Answer:

Point A (8000 BC): the human population was very small compared to nowadays

Point B (approx. 1350 AD): the human population underwent a drastic reduction in size

Point C (1750-2020 AD): the human population is undergoing an exponential growth

Explanation:

The emergence of agricultural practices during the early Holocene period 10000 thousand years ago enabled humans to remain in one place permanently (sedentism) and increased food resources, which had a positive impact on population growth. During this period (Point A), it is estimated that the world population was between one and ten million people. During 1345-1351 AC (point B), the world suffered the "Black Death", one of the most devastating pandemics that led to the death of up to 70–200 million people in North Africa, Europe and Asia, thereby causing a drastic reduction in human population. Moreover, scientific and technological advances in the last 250-270 years (i.e., since the industrial revolution to nowadays, point C) led to an exponential increase in the human population. Nowadays, the current world population is 7.6-7.8 billion people.