Hot coffee in a vacuum flask (thermos) is an example of what type of system?
Final answer:
Hot coffee in a vacuum flask (thermos) is considered an approximation of an isolated system in chemistry, which is designed to significantly slow down heat transfer but not completely prevent it.
Explanation:
Hot coffee in a vacuum flask, also known as a thermos, is an example of an isolated system in chemistry.
An isolated system is defined as one that does not allow the transfer of energy or matter into or out of the system.
While no system can be perfectly isolated due to eventual heat transfer to the surroundings, a thermos with hot coffee is a good approximation because it is designed to significantly slow down heat transfer, thanks to its vacuum insulation and other features like reflective walls.
Over time, however, even in a thermos, the coffee will cool as some heat is lost to the surroundings, illustrating that a truly isolated system does not exist but can be approximated for practical purposes.
The growth hormone level rose so much and caused a markedly accelerated growth in adam because
A student is conducting an experiment to determine what type of soil earthworms prefer, wet or dry. Ten earthworms are released into a cardboard box that contains dry soil on one side and wet soil on the other. Over 24 hours, the student records the number of earthworms on both sides every hour. What component of the above experiment is the dependent variable?
species of worm used
number of trials
average number of earthworms in each type of soil
soil mosisture
The dependent variable in the experiment is the average number of earthworms in each type of soil
What is an experiment?In science, we are often looking out for cause and effect relationships. This lies at the center of most of the scientific investigations that we often engage in. In this case the student is trying to ascertain what type of soil earthworms prefer, wet or dry.
The procedure of the experiment is to release ten earthworms into a cardboard box that contains dry soil on one side and wet soil on the other. During the experiment, the student records the number of earthworms on both sides every hour.
It is clear that the dependent variable in this case could easily be seen and understood to be the average number of earthworms in each type of soil.
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Please help me!!
Humans, plants and mushrooms are all alive. What do these organisms have in common?
Answer:
All living things such as Humans, plants and mushrooms respire, reproduce, locomote, grow, die and decompose.
Explanation:
Since Humans, plants and mushrooms are all living things (biotic) they have following common characteristics -
a) They all are made up of cells which divide by the process of either mitosis or meiosis to grow and reproduce.
b) They all show locomotion in some way.
c) They all have certain vital tissues that are nothing but the specified cells that helps performs specific function.
d) They all die and are decomposed by microbes.
e) They all respire and need nutrition for their survival.
Humans, plants and mushrooms have in common that they are all composed of cells, which are the basis of life.
Cells are the smallest element within the complex structure of living beings and are the basis of their levels of organization.
Common characteristics among humans, plants and mushrooms:
They are multicellular beings (with several cells).All them feed themselves, through food they incorporate certain materials from the environment, these materials are transformed and used to carry out all activities.All them breathe. All them reproduce, that is, they originate new individuals similar to them.In order to maintain their cellular organization, they carry out a biological process known as homeostasis.All comply with the life cycle.Therefore, we can conclude that humans, plants and mushrooms have in common that their biological composition is based on cells and they perform the three vital functions (nutrition, respiration and reproduction).
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Which bone is best used to determine the age of an individual?
What is the type of organism that breaks down the cells of a dead organism?
A patient reports abdominal cramps and diarrhea. the patient's serum potassium level is 6.8 meq/l. what might the nurse infer from this finding?
What was Rudolph Virchow contribution to the cell theory
2. Which of the following is NOT a threat to biodiversity? A) Pollution. B) deforestation. C) crop rotation. D) climate change.
The option (C) is correct. Crop rotation is not a threat to biodiversity.
What do you mean by biodiversity?Biodiversity or biological diversity is the variety and variability of life on Earth. Biodiversity is a measure of variation at the genetic, species, and ecosystem level.
Moreover, biodiversity is all the different kinds of life you'll find in one area—the variety of animals, plants, fungi, and even microorganisms like bacteria that make up our natural world. Each of these species and organisms work together in ecosystems, like an intricate web, to maintain balance and support life.
Therefore, most people recognize biodiversity by species—a group of individual living organisms that can interbreed. Examples of species include blue whales, white-tailed deer, white pine trees, sunflowers, and microscopic bacteria that can't even be seen by the eye.
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What is the most important difference between asexual reproduction and sexual reproduction?
Differences between asexual reproduction and sexual reproduction can be summarized into 6 aspects:
1. Number of parents
2. Makeup of offspring
3. Cell division process
4. Advantages
5. Disadvantages and,
6. Life cycles
Among the six, the most important difference where you can easily identify asexual and sexual reproduction is the number of parents. In asexual reproduction, there is only one parent (either a male or a female) while in sexual reproduction, there are two parents (1 male and 1 female).
Information processing in the body involves neurons communicating with each other at their _____.
The two brassica morphs used in this lab differ at the body color locus. list 3 other aspects of phenotypic variation that you might reasonably expect to see among plants:
The 3 other aspects of phenotypic variation can be size of leaves, shape of leaves, size of seeds.
Further Explanation:
All the plants have a basic body organization. They possess stem, root, leaf etc. Every plants differ from each other. The different forms of the species of plants is known as morphs of plant.
The genetic variation may result in occurrence of different forms or morphs of an organism. These variations are crucial for evolution to occur and also in determining the relative fitness of an organism. The genetic variation can also be exhibited in the form of phenotypic variation.
Brassica is the genus of plant that belongs to mustard family. They are used in production of nutritionally important vegetables such as cabbage, mustard, broccoli etc.
Brassica also exhibits different morphs. An example of morphs of Brassica plants can be the two brassica morphs that differ at the body color locus. The presence of different alleles in the population at the body color locus of the brassica plant may give rise to differential body color in brassica morphs. The other phenotypic variation that can be seen among these plants are-
• Size of leaves
• Shape of leaves
• Size of seeds
The size and shape of leaves may influence the photosynthesis efficiency of a plant. The size of seed may influence the amount of storage product present in them.
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Answer Details:
Grade: College Biology
Subject: Biology
Chapter: Genetics of Brassica plant
Keywords:
Morphs, genetic variation, phenotypic variation, evolution, Brassica, broccoli, cabbage, mustard, locus, relative fitness, alleles, population, species.
Is a regulatory mechanism in which the end product of a metabolic pathway inhibits an enzyme that catalyzes an early step in the pathway?
Cells reproduce by splitting in half, a process called cell division. what do cells need to do between divisions to make sure that they don't just get smaller and smaller? answer the cells grow larger so they just don't get smaller and smaller.
Cells grow during the interphase of the cell cycle, which includes DNA replication to prepare for division. This ensures that each new cell is of the proper size and has the correct genetic material, preventing them from getting smaller with each division.
Explanation:Cell Growth and Division:
To ensure cells do not simply get smaller and smaller with each division, they need to grow. This growth happens in the interphase stage of the cell cycle. During interphase, the cell increases in size and prepares for division by replicating its DNA. After a cell is born, it passes through this critical phase before it is ready to divide. Interphase consists of gap phases (G1 and G2) and the S phase, where DNA replication occurs. Once a cell has grown and replicated its DNA, it can enter mitosis and cytokinesis, thus completing cell division and ensuring each new daughter cell has the correct amount of genetic material and cellular components. Cell division is the basis of growth, development, and maintenance of organisms.
DNA replication is a crucial step that occurs just before the cell divides. Two identical chromosomes are created from one, which guarantees that each new cell receives a full set of chromosomes. This precise process is essential for cell growth and health of an organism.
The relationship between cell division and growth varies across organisms. Some cells may divide without growth during early development, but eventually, to continue dividing, there needs to be an increase in mass and size shown by the acquisition of materials for new cell formation.
What tissue are specialized cells that react to tension/stress?
The specialized cells that react to tension or stress are primarily from muscle tissue and dense connective tissue. Muscle tissue is capable of contracting and generating tension, while dense connective tissue like tendons and ligaments demonstrate superior resistance to stretching due to a high collagen fiber content.
Explanation:The specialized cells that react to tension or stress come from two main types of tissue: muscle tissue and dense connective tissue. Muscle tissue can contract and generate tension in response to stimulation which contributes to movement. This is particularly visible in organs like the heart and muscles that often endure a large degree of tension.
On the other hand, dense connective tissue such as ligaments and tendons contain a high number of collagen fibers, which gives them superior resistance to stretching. In short, both muscle and dense connective tissues are specialized to withstand and respond to tension or stress.
In addition to these, many cells including fibroblasts, chondrocytes, osteocytes etc., contribute to the formation of connective tissues, giving them their resilience. Para
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During what stage of complete cellular respiration is most of the atp produced
which process provides the energy used to make ATP from ADP?
Answer:
Option A, the break down of food molecule
Explanation:
During hydrolysis of ATP, 1 molecule of phosphate is released and ADP is formed
The hydrolysis of ATP to produce ADP is a reversible reaction and thus ADP uses the extra energy with in the cell to convert back to ADP. This extra energy comes from the food break down.
The reactions involved are as follows
Hydrolysis of ATP
ATP ----> ADP + P + energy
Formation of ATP from ADP
ADP + P + energy --------> ATP
What happens to a gummy bear in salt water?
using this hypothesis "if you eat candy, then you will get cavaties" what is the independent variable
Within this body part, lymph acquires particles that help the _______ system function.
Within this body part, lymph acquires particles that help immune system function. According to Merriam dictionary, immune system is defined as “the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), macrophages, lymphocytes including the B cells and T cells, and antibodies.”
Final answer:
The lymphatic system is pivotal in supporting the immune system by transporting lymph that contains lymphocytes, which are vital for defending the body against specific pathogens and ensuring long-lasting immunity.
Explanation:
Within the lymphatic system, lymph acquires particles that help the immune system function. The lymphatic system plays a crucial role in the body's defense mechanisms by transporting lymph, a fluid containing white blood cells called lymphocytes, throughout the body. These lymphocytes are central to the adaptive immune system, responsible for recognizing and defending against specific pathogens or tumor cells. The lymphatic system includes organs such as lymph nodes, the spleen, and the thymus gland, all of which work together to filter out pathogens and cellular debris, produce and mature lymphocytes, and ultimately support long-lasting immunity against diseases.
Which molecules do not normally cross the nuclear membrane? Hints Which molecules do not normally cross the nuclear membrane? DNA Nucleotide triphosphates mRNA Proteins
DNA does not normally cross the nuclear membrane.
The nuclear membrane, also known as the nuclear envelope, is a double-membraned structure that surrounds the nucleus of eukaryotic cells. It has selective permeability, allowing only specific molecules to pass through. DNA is a large and complex molecule that does not freely diffuse through the nuclear pores in the nuclear envelope. Instead, it is transcribed into mRNA within the nucleus, and only the mRNA molecules, not the DNA itself, can exit the nucleus through nuclear pores to reach the cytoplasm.
This separation of DNA from the cytoplasmic environment is critical for the regulation and protection of the genetic material. In contrast, nucleotide triphosphates (used for DNA and RNA synthesis), mRNA, and proteins are molecules that can move in and out of the nucleus through the nuclear pores as needed for various cellular processes.
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What type of connective tissue is found only in the umbilical cord?
Hydrogen bonding results in two processes which we see as ____ and ____
Answer:
Disassociation, polarization and attraction
Explanation:
In an hydrogen bond, the hydrogen act as partially positive atom while the other element to which it is bonded act as partially negative atom. This second element other than the hydrogen can be oxygen, fluorine, chlorine etc.
First the hydrogen bonds disassociates and polarizes thereby forming two poles one positive and the other one negative.
The positive poles now try to attract the negative pole of other molecule of the same substance or any other substance. The same happens with the negative pole also.
These cells are part of the domains Archaea and Bacteria.
prokaryotes
eukaryotes
Answer:
Prokaryotes.
Explanation:
Prokaryotes are the unicellular organism that lacks the membrane bound organelle. A well defined nucleus is absent in the prokaryotic organism. Three domain of life are archaea, bacteria and prokarya.
Prokaryotes include the domains archaea and bacteria. Both these domains contain flagella like structure for their locomotion. The organisms are unable to be seen with naked eye and all organism are microscopic organism.
Thus, the correct answer is prokaryotes.
Process by which two simple molecules are joined by the removal of one water molecule
The proportions of carbohydrate, fat, and protein recommended for the diets of physically active individuals are not within the ranges recommended to the general public. question 38 options:
a. True
b. False
Discuss why cell division is essential in the developmental stages of fetal growth as it relates to cell communication that leads to cell differentiation.
Amy made the table shown to describe two different relationships between animals.
Organism InteractionsRelationship A Relationship B
Both organisms benefit One organism benefits, the other is unaffected
Which of the following statements is most likely correct?
Relationship A is parasitism and Relationship B is competition.
Relationship A is competition and Relationship B is parasitism.
Relationship A is commensalism and Relationship B is mutualism.
Relationship A is mutualism and Relationship B is commensalism.
Answer:
Option (4).
Explanation:
Biological interactions are important among the organism that helps them to survive in their environment. Biological interactions may be harmful or useful for the organisms.
Mutualism may be defined as a type of interaction in which both the species are benefited from each other. Amy should include relationship A in mutualism. Commensalism may be defined as the type of interaction in which one species is benefited and other organism is neither benefited nor harmed the individual. The relationship B is involved in commensalism.
Thus, the correct answer is option (4).
Which of the following best describes a way in which human lifestyle affects the level of greenhouse gases in the atmosphere?
I believe that the answer is D
Why are scientists interested in stem cell research?
Answer:
stem cells can eventually be used to replenish cells in the human body that have been lost to the disease.
Explanation:
Stem cells are undifferentiated and have the ability to limitlessly renew themselves.