Use the following terms to explain how specialization occurs: DNA, gene expression, differentiation *

Answer:

Melting and boiling points.

Explanation:

That s is because the bonding in ionic compounds is much stronger than covalent compounds.

Molecular compounds have lower melting and boiling points than ionic compounds because the intermolecular forces within molecular compounds are weaker than the ionic bonds in ionic compounds, requiring less energy to disrupt.

Compared with ionic compounds, molecular compounds have lower melting and boiling points. This is because molecular compounds, also known as covalent compounds, are composed of molecules held together by various types of intermolecular attractions, such as hydrogen bonding, dipole-dipole interactions, and London dispersion forces. These forces are significantly weaker than the ionic bonds found in ionic compounds, which are typically formed between metals and nonmetals and create a rigid crystalline structure. Hence, less energy is required to disrupt the intermolecular forces in molecular compounds, resulting in their generally lower melting and boiling points. For example, water, a molecular compound, melts at 0 °C and boils at 100 °C, whereas sodium chloride, an ionic compound, melts at 801 °C and boils at 1413 °C. These characteristics also lead to molecular compounds being poorer electrical conductors and having varied water solubility based on the type of intermolecular forces involved.

Answer:

C

Explanation:

Answer no 8:

The correct option is D) Antelopes with muscular legs are bale to outrun their predators better than antelopes with poor muscle tone. Thus they lived to reproduce.

Explanation:

Genetic variations in a population are the main reason that natural selection tends to occur. Natural selection favours those organisms which have better characteristics.The organisms with better traits are able to reproduce and pass on their characteristics to their offsprings.

Answer No 10:

The correct option is A) Phenotype directly influences the interaction of an organism with its environment.

Explanation:

The interactions between the phenotypic traits and the environment analyze whether a particular organism will be able to survive and pass on its characteristics to its offspring. Hence, the phenotype directly influences the interaction of an organism with its environment.

Answer No 9

The correct option is A) resistance to a virus

Explanation:

Mutations can be described as any changes which occur in the DNA of an organism. Mutations might be beneficial or harmful depending on the location where the mutation arises. Viruses are usually harmful for eukaryotes. Hence, the correct option is A.

Answer No 11:

The correct option is C) Giraffes with longer necks survived because they were better suited to the environment.

Explanation:

Natural selection tends to favour those organsims which are better suited to live in an environment. Those organisms with better characteristics are able to survive and pass on their traits to their offsprings.

The giraffes with longer necks were better adapted to live in the environment and hence were favoured by natural selection.

Answer No  12:

The correct option is D) selective breeding

Explanation:

Selective breeding can be described as a technique in which organisms with better characteristics are crossed, so that offsprings with better characteristics can be produced. Selective breeding is done by humans where as natural selection is done by the nature.

Answer:

a. Anaphase 2

b. Metaphase 1

c. Telophase 1

d. Prophase 1

e. Telophase 2

Explanation:

Following is a summary of the events of meiosis:

Interphase:

Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).

Prophase 1:

First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.

Metaphase 1:

Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.

Anaphase 1:

The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.

Telophase 1:

The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.

Meiosis 2:

Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.

The steps of meiosis shown in the diagrams are: Prophase I, Metaphase I, Anaphase I, Telophase I, Cytokinesis I, Prophase II, Metaphase II, Anaphase II, Telophase II, Cytokinesis II.

The steps of meiosis shown in the diagrams are:

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The annual high temperature in Cape Hatteras, North Carolina, is higher than the annual high temperature in Monterey, California, because a warm water surface current flows along the east coast of the United States, which is in Option a.

It has many implications, such as the fact that warm water plays a critical role in the ocean's circulation patterns, which have a significant impact on marine life, and that warm water leads to sea-level rise and has a significant impact on coastal communities.

Hence, the annual high temperature in Cape Hatteras, North Carolina, is higher than the annual high temperature in Monterey, California, because a warm water surface current flows along the east coast of the United States, which is in Option a.

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Answer:

B. ) Nucleic acids to amino acids

Explanation:

Translation happens after DNA has already been copied into RNA and is now going to be translated from its form as RNA to a protein/ Amino Acid.

Answer:

Because it’s the most beautiful of all texile fibers

Answer:

A mature animal will  have been fully developed whereas an immature animal will not be fully developed. In a mature animal, all stages of development will have occurred whereas in an immature animal not all developmental stages would have occurred.

A mature animal will be better adapted to live in an environment as compared to an immature animal.

Mature animals have reached reproductive age, can survive independently, and have learned behaviors that aid their survival, while immature animals are still developing physically and behaviorally, and depend on parental care.

Difference Between Mature and Immature Animals

The terms mature and immature refer to distinct life stages in the development of animals. A mature animal has reached a stage where it can reproduce and has developed sufficient physical and behavioral characteristics to survive independently in the wild. On the other hand, an immature animal is still in the process of growth and development, and typically relies on parental care. Immature animals may not yet have the full capability to survive on their own and have not reached sexual maturity. For example, in mammals, this period of immaturity is longer as compared to other animals, involving learning social and physical environmental aspects.

Mature animals often have advantages over immature ones, including better survival skills learned through experience, which in the evolutionary context, means that they are more successful in propagating their genes. Furthermore, mating rituals and societal behaviors may favor the reproductive success of mature animals over their younger counterparts.

These differences can be crucial, particularly in species that nurture their offspring over a significant period, as investment in the development of an immature animal is substantial. Thus, the distinction between mature and immature animals is not only based on physical maturity but also includes learned behaviors and the ability to successfully interact with their environment.

Answer:

Species: buccinator

Genus: Cygnus

Family: Anatidae

Explanation:

Answer:

69m and 52hshnshjnshshsn

Answer:

pleasure

Explanation:

;)

The properly balanced chemical equation is option A. 4Ba + S, → 2BaS.

The properly balanced chemical equation is option A. 4Ba + S, → 2BaS.

To balance a chemical equation, the number of atoms of each element should be the same on both sides of the equation. In option A, there are 4 barium (Ba) atoms and 1 sulfur (S) atom on both sides. Therefore, this equation is properly balanced.

In the other options, there is an imbalance in the number of atoms of one or more elements.

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The element found in both DNA and protein is nitrogen.

Explanation:

Answer:

Nitrogen

Explanation:

As blood pressure increases and the hearts is working harder the most vulnerable arteries area are those Located near the heart, because they are absorbing the most shock.

Explanation:

When the heart pumps blood, the highest pressure is felt close to the heart. This is why the aorta, the artery that carries blood away from the heart is made up of thick walls to withstand this pressure, otherwise, these vessels would rupture. Away from the heart, this pressure lessens, and the blood vessels are not so thick-walled.

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Answer:

a) humans evolved from gorillas and other primates.

Explanation:

What Darwin proposed, in fact, is that apes and humans have a recent common ancestor that places both apes and humans in the group of primates. This is the theory currently accepted to explain the evolution of humans, so the correct answer to your question is the letter A.

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Answer:

Bone marrow can be found in the many hollow spaces in the spongy  type of bone.

Answer:

Your answer is spongy. Or Bone marrow can be found in the many hollow spaces in the spongy type of bone.

Explanation:

Take a look at the picture it is proof!

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Answer:

Carbon dioxide and water are released after the energy molecule is charged

Explanation:

Cellular respiration is a metabolic reaction in which glucose and oxygen molecules used to produce, carbon dioxide, water and, ATP. The stages of cellular respiration include glycolysis, pyruvate oxidation, the citric acid or Krebs cycle, and oxidative phosphorylation.

On the other hand, other options are not right because glucose molecules are used in the reaction rather than produced. Water molecules are produced as a result of consuming glucose and oxygen.

A description which properly describes a step involved in cellular respiration is; Carbon dioxide and water are released after the energy molecule is charged.

Discussion:

The totality of the cellular respiration process is characterized by the production of energy (ATP) in the body alongside Carbon dioxide and water from the oxidation of the energy molecule.

The energy molecule in this context is Glucose.

Upon metabolism (oxidation); Carbon dioxide and oxygen are produced alongside energy in the form of ATP.

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Answer:

b

Explanation:

The value of x = 4

Explanation:

RS = 4(x-3)+6

     = 4x-12+6

     = 4x-6

RT = 5(2x-6)

     = 10x-30

Showing left hand side is equal to right hand side.

4x-6 = 10x-30

Divide both left hand side and right hand side by 2, we get:

2x-3 = 5x-15

Rearrange both the sides

-3+15 = 5x-2x

12 = 3x

x = 4

Thus, the value of x is 4

Answer: If P is pink body color trait and p is yellow body color trait, and P is dominant over p which is recessive, therefore heterozygous for pink body color is Pp.

The possible genotypes of their children are PP, Pp and pp. There are 1PP, 2Pp and 1pp genotypes.

Genotypes ==> Phenotype

PP = pink body color

Pp = pink body color

pp = yellow body color

Genotypic ratio= 1PP : 2Pp : 1pp, which is, one homozygous pink body color : two heterozygous pink body color and 1 homozygous yellow body color.

Explanation:

PP will manifest phenotypically as pink body color, Pp will manifest phenotypically as pink body color while pp will manifest as yellow body color. This is because pink body color trait (P) is dominant over yellow body color trait (p) which is recessive.

See the attached punnett square for illustration

Answer:

A gene on a chromosome lies close to another gene controlling a different trait. This indicates that the genes are strongly linked . The first gene contributes to the expression of the second gene. This indicates polygenic inheritance.

Answer:

A gene on a chromosome lies close to another gene controlling a different trait. This indicates that the genes are  strongly linked . The first gene contributes to the expression of the second gene. This indicates  polygenic inheritance .

Explanation:

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Answer:

A characteristic feature of ferns is their root structure. Ferns spread by rhizomes, which are stems that may run just above or just below the ground. The rhizomes produce fronds above them and roots below them. Some ferns have spreading habits while others have clumping forms, but both types produce roots from their rhizomes.

Explanation:

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Answer: euglena can feed as an heterotrophs (feeding on other organism)

Explanation:

Euglena takes in nutrient by taking in dissolved organic compound by osmosis for nutrition, and can survive without light.

Euglena absorbs the food directly through the cell membrane , entraps the food particles in a vacoule for digestion.

Answer:a). base pairing rules

Explanation: A DNA is a double stranded helix in which the two DNA strands are antiparallel and complementary to each other. Watson and Crick developed the base pairing rules that adenine pairs with thymine and cytosine pairs with guanine. The complementary strand are not the same in base sequence and composition instead anywhere adenine is found in one strand, thymine is found in the other strand and anywhere cytosine is found in one strand, guanine occurs in the other strand.

Answer:

Because salt dehydrates the fish and also freezes it and keeps it from thawing and rotting.

Explanation:

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When toucans are removed from an ecosystem it leads to loss of hardwood trees, deforestation, and global warming.

Explanation:

Toucans are very attractive brightly colored large birds which are fruigivore (fruit-eaters). They are specially adapted with a large, sharp but lightweight bill which helps the toucans to reach to branches to pick fruits, berries, seeds mostly which are larger and difficult for the smaller birds to eat.  

Their main habitat for the toucan is the rainforests. They are woodland birds and stay mostly on hardwood trees.  

Toucans help the rainforest ecosystem to grow by dispersing the seeds of the fruits they eat all around the forest as they keep flying. This makes the species of trees from which toucans pick their fruits to increase and makes the rainforest healthy.  

When toucans are removed, then dispersal of seeds becomes less and spreading of hardwood trees will be reduced slowly leading to deforestation and drying up of forest lands.

Bigger hardwood trees play a major role in reducing carbon footprint compared to the softwood smaller trees and this increase in carbon will lead to global warming.

Answer:

8. D

9. A

10. A

11. C

12. D

Explanation:

8. Natural selection works on variation that exists in the genes of organisms. Antelopes who have genetic variation that makes their legs more muscular are at an advantage because they can outrun predators. This increases the chance that they will reach reproductive age, and be able to pass this advantageous trait onto their offspring. Over time, this selection pressure makes the variant more common in a population.

9. Beneficial traits are those that give a selective advantage. This could be one that helps it outrun predators (like above), avoid illness and death, gives it a reproductive advantage (i.e. more attractive to mates), or makes it better able to digest certain foods, for example. The formation of cancer cells would be harmful for an organism, reducing its fitness and perhaps leading to death. The inability to reproduce would mean genetic info is not passed on to the next generation, and stopping the production of an essential protein would likely lead to death. However, resistance to a virus would help an organism avoid illness and death, improving fitness.

10. Genotypes are what organisms inherit from their parents, i.e. the genetic information that is passed on. However, the way in which different alleles interact and are expressed is the phenotype. If we take the above example, natural selection is acting on the phenotype of muscular legs. If an antelope had the muscular leg genotype but for some reason it was not being expressed (maybe another gene is interfering with it), then the antelope would not have a selective advantage, and natural selection could not be act on the trait.

11. A trait that better suits an organism to its environment will be selected for by natural selection. This is because that organism is more likely to survive due to the trait, giving it a selective advantage. Therefore, if a mutation arose making the giraffe more adapted to the environment, it would be positively selected for, and through evolution would become more common.

12. This is an example of selective breeding, which has been happening for generations. Farmers spot desirable traits, and cross horses with these traits in an attempt to enhance the trait or to ensure it is passed on to the next generation. This is not natural selection, because farmers are making it happen artificially. It is not cloning or recombinant DNA, which are terms scientists use for actually manipulating the DNA in the lab.

Answer:

Energy is gained when the light energy that gets taken in by the chloroplasts turns water and carbon dioxide into glucose, which the plants use as food, and oxygen gas, which is released.

Answer:

Solar energy is a form of smart energy that can be used to heat water for homes.

Explanation:

Solar radiation, as it's well known, is capable of providing light and heat to the planet. The characteristics of the energy provided by the sun make it possible the use as an accessible, clean and cheap energy source.  

Solar energy has properties that make it a form of smart energy:

Solar panels are devices that have been designed to capture energy from the sun and turn it into a source of energy for households. When talking about smart energy, solar energy represents a useful alternative for home use, including the action of heating water.

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Final answer:

Solar energy can be used to heat water for homes through various methods such as photovoltaic panels. It is a form of "smart" energy and renewable and sustainable source of energy.

Explanation:

Solar energy is a form of energy that can be used to heat water for homes. It can provide direct heat or make electricity via photovoltaic (PV) panels or in a utility-scale solar thermal installation.

Other forms of energy commonly encountered include electric energy, chemical energy, radiant energy, nuclear energy, and thermal energy.

Scientists and engineers have developed various ways to harness energy from the sun, such as using solar cells to directly convert sunlight into electricity.

All the soils are made up of water, organic matter, air, and the mineral particles, but the combinations of all these elements determine the soil’s texture, colour, and porosity. This will help the people to identify the fertility soil.

Explanation: