Answer:
Thermal energy can be transferred by conduction, convection or radiation
Explanation:
Thermal energy is the energy that flows from one point to another due to temperature differences between the points. There are three ways by which thermal energy is transferred which are conduction, convection and radiation.
In conduction, thermal energy is transferred in solids usually metals due to their good heat conductivity. An example is seen in the use of metals for preparing meals. Heat (or thermal energy) is transferred from the fire to the metal to the food.
Convection occurs in fluids (liquids and gases). It usually occurs in a cyclic manner. For example in heating water, thermal energy is gained by water molecules closest to the heat source (at the base of the container) and become lighter causing them to rise to the top. The molecules at the top become denser and sink to the bottom whereby they gain energy and rise in a similar manner. This repeated phenomenon occurs in a cyclic form whereby there's displacement of colder and denser molecules by warmer and lighter molecules. Another example is the occurrence of sea and land breezes.
Radiation occurs without the need of any material medium unlike conduction and convection. In radiation, heat is directly transferred from one point to the other without being transferred by molecules. This is seen in how thermal energy from the sun reaches the earth. In other words, heat is transferred in a vacuum
The cytochrome oxidase-positive bacterial species that is DNAse negative, ornithine decarboxylase positive, and is associated with gastroenteritis in children after the ingestion of contaminated water is most likely:
Answer: a selection variable
Explanation:
Answer:
a selection variable
Explanation:
In 2001, the Human Genome Project reported that humans have about 30,000 genes. By 2018, researchers had revised that number to
In 2001, the Human Genome Project reported that humans have about 30,000 genes. By 2018, researchers had revised that number to 20,700. This is further explained below.
What is Genome?Generally, Genome can be defined as a gamete or microorganism's haploid pair of chromosomes or each cell of a multicellular organism
In conclusion, researchers had revised that number to around 20,000 to 25,000 in later years
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100 points hurry
Explain at least three pro’s and three cons of invasive species . Three reasons why it’s a good solution and three reasons why it’s not, or what challenges it faces.
Who are the stakeholders (people who would care about this issue)? Include those who are supportive of the solution and how it would benefit the environment, and people who would be opposed to the solution (usually they would lose money somehow). If there are no people opposed, state that.
write out five examples each of food chain in terrestrial and aquatic habitat
Answer:
1.) Sun, Sea water plant, bottom feeder fish, shark,
Explanation:
I have done those questions before and I just gave a basic answer but Sun is always at the top because it gives energy for plants which is normally second like for example: Sun, Grass, Grass hopper, Snake, Bird, Spider (that eats birds or something)
A new predator is introduced to an aquatic ecosystem. In a population of fish that live there, very small fish are more easily able to hide from the predators, and very large fish cannot be easily eaten by predators. What type of natural selection is acting on the population, and what will be the expected result?
A.Stabilizing selection: Since both extremes are selected against, the fish population will remain about the same.
B.Disruptive selection: Over time the fish population will change. Medium-sized fish will become rare, small and large fish will be common.
C.Stabilizing selection: Over time the fish population will change. Medium-sized fish will become rare, small and large fish will be common.
D.Disruptive selection: Since both extremes are selected against, the fish population will remain about the same.
Disruptive selection: Over time the fish population will change. Medium-sized fish will become rare, and small and large fish will be common is a type of natural selection that is acting on the given population. So, it's B.
What do you mean by Ecosystem?An ecosystem may be defined as any place or area where the members of different species or communities live together and interact with one another for the purpose of food, shelter, and space.
As predators are only able to attack the moderate-sized fishes, so the population of moderate-sized fishes may decline in the aquatic ecosystem, while extremely short and large fishes are able to maintain their population at the same pace.
Therefore, the correct option for this question is B.
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What happens in the original cell so that each of the daughter cells has a complete set of chromosomes
Answer:
The DNA gets copied equally through a process called mitosis and the copied DNA(chromosomes) are split equally among the daughter cells.
How are viral diseases different from
other types of diseases?
A. there aren't medicines to cure a viral disease
B. viruses spread quickly
C. it infects healthy cells
D. it causes an immune response
According to the research, viruses spread quickly is the statement that describes how viral diseases differ from other types of diseases.
What is a virus?It is a biological entity that has the ability to self-replicate by using cellular machinery.
It requires the metabolic machinery of the invaded cell, in order to be able to replicate its genetic material and produce many copies of the original virus quickly, this process can harm the cell to the point of destroying it.
Therefore, we can conclude that according to the research, viruses spread quickly is the statement that describes how viral diseases differ from other types of diseases.
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Outline the average female reproductive cycle (note that this is distinct from the menstrual cycle), in particular noting when ovulation occurs, when estrogen peaks, when progesterone peaks, and the approximate time span when a woman would be most fertile. Physiologically, why does this cycle change when a woman ages (around 50 years old or so)?
The menstrual cycle are menstruation, have the follicular phase, ovulation and the luteal phase.
Explain menstrual problems?Common menstrual problems have heavy or sore periods and premenstrual syndrome (PMS).
When in the menstrual cycle a woman is Considered as likely to conceive can improve the possibility of pregnancy.
Thus, have the follicular phase, ovulation and the luteal phase.
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Because the tuberculosis bacteria generally stay dormant after they invade the body, only ___________ percent of people infected with TB will ever develop the active disease. (9.2.5
Only 5-10 percent of people infected with Tuberculosis will ever develop the active disease.
What is Tuberculosis?This is an airborne and contagious disease which affects the lungs and can be treated using antibiotics.
Most times, it is dormant and only about 5 to 10 percent of people will ever develop the active disease.
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Which factor most accurately describes the statement ""survival of the fittest"" in relation to natural selection?.
Answer:
Predators
Explanation:
With natural selection, survival of the fittest can mean many things however one of the factors of which accurately describes the statement would be predators.
The chickenpox virus can remain latent in host cells by integrating its DNA into the host cell genome. This virus uses the ______ cycle as its main life cycle pathway.
The chickenpox virus can remain latent in host cells by integrating its DNA into the host cell genome. This virus uses the genoma replication cycle as its main life cycle pathway.
How does the virus replication process take place?Viral replication refers to the process by which a virus reproduces within a living organism. This usually involves turning infected cells into virus factories, which make copies of the virus's genetic code and expel them to spread into the host's body.
Upon replication, viruses produce new copies of themselves within infected cells.
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Which substances compose the backbone of DNA? sugars and lipids phosphates and amino acids sugars and phosphates lipids and proteins
Consider the following experiment. A healthy plant is placed in a sealed container overnight, when the plant is in darkness. The concentration of oxygen in the trapped air is measured at the start of the night and again in the morning.
Predict whether you expect there to be more or less oxygen in the container in the morning, or the same? Explain why.
I expect to see less oxygen in the container in the morning because plants consume oxygen at night.
What is cellular respiration?Cellular respiration is the process by which organisms consume oxygen and generate carbon dioxide.
During the night, a plant can consume oxygen and release carbon dioxide in this process (respiration).
In conclusion, I expect to see less oxygen in the container in the morning because plants consume oxygen at night.
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A population of squirrels lived together in a forest. An event occurred that caused the population to diverge into two different species over a long period of time. Which of the following is most likely the event that occurred?
Answer: A natural disaster occurred that separated squirrels.
Hence, this would be the answer.
Answer:
B. A natural disaster that separated squirrels
Explanation:
I can confirm this is correct because I just did the test.
DNA replication happens in _____ phase of the cell cycle in the _________ of the cell.
What explains how the parents in a family both have the same eye color, but some of their children have a different eye color? Assume for this example that eye color is determined by a single gene.
A. One parent is homozygous dominant, and the other heterozygous for a gene that controls eye color allowing some of the children to express a different trait.
B. The parents are both homozygous dominant for a gene that controls eye color allowing some of the children to get two recessive alleles.
C.One parent is homozygous dominant, and the other homozygous recessive for a gene that controls eye color allowing some of the children to express a different trait.
D. The parents are both heterozygous for a gene that controls eye color allowing some of the children to get two recessive alleles.
The correct option is D. The parents are both heter0zyg0us for a gene that controls eye color allowing some of the children to get two recessive alleles.
What is complete dominance?When the dominant allele completely masks the recessive allele, we talk about complete dominance.
This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant trait. The dominant allele is hiding the expression of the recessive allele.
In the exposed example, let us assume that the alleles that code for eye color are the followings,
E is the dominant allele and codes for the dominant colore is the recessive allele and codes for the recessive colorIf at least one parent is h0m0zyg0us dominant for the trait, EE, the whole progeny will express the dominant trait because all of them will carry at least one dominant allele.
If both parents are heter0zyg0us Ee, some children will express the dominant trait and some other the recessive trait. This is because some of the children receive at least one dominant allele and some others only receive recessive alleles.
Cross:
Parentals) Ee x Ee
Gametes) E e E e
Punnett square) E e
E EE Ee
e Ee ee
F1) Genotype
1/4 = 25% of the progeny is expected to be h0m0zyg0us dominant EE
1/2 = 50% of the progeny is expected to be heter0zyg0us Ee
1/4 = 25% of the progeny is expected to be h0m0zyg0us recessive ee
Phenotype
3/4 = 25% of the progeny is expected to have the dominant eye color
1/4 = 25% of the progeny is expected to have the recessive eye color
The correct option is D. The parents are both heterozygous for a gene that controls eye color allowing some of the children to get two recessive alleles.
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The organization of a organism from smallest to largest is Cell, tissue, organ, organ system, organism
True
False
The cellular organization from smallest to largest is cells, tissues, organ, organ system and organism. Hence, the given order is true.
What is cellular organization ?Cellular organization refers to the hierarchical arrangement of cells in living organisms. All living organisms are composed of one or more cells, and the way in which cells are organized within an organism is critical to its overall function and survival.
At the smallest level, cells are organized into organelles, which are specialized structures within the cell that perform specific functions. For example, mitochondria are organelles that produce energy for the cell.
Cells are then organized into tissues, which are groups of cells that work together to perform a specific function. Examples of tissues include muscle tissue, which is responsible for movement, and nerve tissue, which is responsible for transmitting signals throughout the body.
Tissues are then organized into organs, which are structures that are made up of two or more different tissues and perform a specific function. For example, the heart is an organ that is made up of muscle tissue and nerve tissue and is responsible for pumping blood throughout the body.
Finally, organs are organized into organ systems, which are groups of organs that work together to perform a specific function. For example, the circulatory system is an organ system that includes the heart, blood vessels, and blood and is responsible for transporting oxygen and nutrients throughout the body.
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are iguanas aggressive animals
Answer: Depends on there mood like a lot aninmals. Typically though, they are not aggresive and are probably hungrey.
Distinguish how an animal welfare activist would most likely feel about the animals’ housing and training in the following scenario.
A traveling circus uses a number of animals in its act, including a tiger and a small herd of elephants. When traveling, the tiger gets its own car and attendants who feed it regularly. The elephants are dispersed among three cars and each has a number of attendants who feed and clean up the elephants’ waste. To train the animals, the circus hires animal trainers who use whips to teach the animals how to behave in the ring.
Answer:
using whips on animals is not a desirable activity, as well as circus' being notorious for the mistreatment of animals, I think anybody who had these animals welfare in mind would disapprove of this scenario
Explanation: my Best guess with the contect given
What is the chemical equation for aerobic respiration
Answer:
C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy
Explain how cancer cells grow.
Answer:
Gene mutations in cancer cells interfere with the normal activity within a cell.This can cause it to grow out of control and/or not die when it should. Cancerous cells can continue to grow because they behave differently than normal cells do. Cancer cells differ from regular cells in many ways,one of their more apparent traits is that they divide quickly with no control over them.The amino acid glutamine is one of the many key factors to helping the growth of cancer cells. Like all cells, cancer cells need nutrients to grow,sugar is one important fuel for it's development, but is far from the only factor.
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Explain how Direct Harvesting has contributed towards the loss of
biodiversity.
Crossing individuals with similar characteristics
so that those characteristics will appear in their
offspring is called
a. inbreeding
b.hybridization
c. recombination.
d. polyploidy.
Answer:
a. inbreeding
Explanation:
Breeding two closely related species will give offspring with similar characteristics as the parents.
Which observations describe both images? Select all the correct answers. The oil mixes with water. The oil floats on the surface of the water. The oil sinks to the bottom of the water. The oil spreads to cover the water. The oil stays in one spot.
The correct answers are, the oil floats on the surface of the water and it spreads to cover the water surface.
Properties of oil
Oil is a liquid substance that can be described with the following properties;
Oil is less dense than water, which means it will float in waterOil has high viscosity, and with the help of surface tension of water it will spread in water.Thus, the correct answers are, the oil floats on the surface of the water and it spreads to cover the water surface.
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Humans are _________, we cannot make our own food
Answer:
Consumers
Explanation:
Humans are consumers because we only get nutrients from other organisms such as plants (producers) or animals (also consumers)
Only Producers make their own food.
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Explain/identify each phase of the cell cycle. (interphase + mitosis + cytokinesis).
Answer:
Interphase is when cell grows, replacing it chromosomes while preparing for cell division.
Mitosis - copies its chromosomes and then segregates them, generating two identical nuclei.
Cytokinesis - the cytoplasm splits in half to make two new cells.
Which from the list is the first step in protein synthesis?
A) The initiator codon binds to the first transfer RNA
B) Two ribosome bind subunits bind to messenger RNA
C) Amino acids produced bonds to form a polypeptide chain
D) The anti-codon of another transfer RNA binds to messenger RNA
Ovulation involves the release of the _____________ from a mature follicle.
Answer:
ovulation involves the release of the secondary oocyte from a mature follicle
Explain why the pyramid of ocean life directly affects human health.
Answer: humans eat some the ocean life, and other fish don't have any food because of it.
Explanation:
37. Describe the basic structure of the cell membrane. What is the cell membrane's main function?