Answer:
During freezing, water molecules lose energy and do not vibrate or move around as vigorously. This allows more stable hydrogen-bonds to form between water molecules, as there is less energy to break the bonds...Thus water expands as it freezes, and ice floats atop water.
Explanation:
10: For the fermentation experiment: List the 4 reagents used and their function
Answer:
yeast, invertase, bacterial culture, maltase
Explanation:
Fermentation is defined as a metabolic organic substance are chemically changed with the help of enzymes. The process of fermentation is used for the production of food such as bread and beverages such as alcohol.
Reagents are the chemical used to process a chemical reaction in an expriment. So reagents used in fermentation are yeast, invertase, bacterial culture, maltase.
Yeast is a fungus used for alcohol production that that is used to improve the nutritive value of the beverage.
Invertase is an enzyme that is used to cleave the glycosidic linkage between fructose molecules and glucose.
Bacterial culture are use to ferment the process that produces alcohol and carbon dioxide.
The enzyme maltase breaks the bond between maltose and convert it into glucose.
Which property of water makes it mix well with most solutes?
A. Cohesion and Adhesion
B. High Heat Capacity
C. Universal solvent
Answer:
it would be C. Universal solvent
A scientist grew an Elodea plant in a freshwater aquarium. She removed a leaf from the plant and placed the leaf in a hypertonic solution containing 8% salt in order to observe what happened to the cells within the leaf. When she looked at the cells under a microscope, she noticed that the cells in the leaf shrunk. Which statement best explains what caused the cells to shrink?
The hypertonic solution caused the water in the cell to move from the cytoplasm into the nucleus.
The salt moved from the hypertonic solution into the cell and chemically bonded with the water.
The salt within the cell moved through the cell membrane into the solution with the higher salt concentration.
The water within the cell moved through the cell membrane into the solution with the lower water concentration.
Answer:
The water within the cell moved through the cell membrane into the solution with the lower water concentration.
Explanation:
According to this question, a scientist removed the leaf of a plant originally grown in a freshwater aquarium and placed it in a hypertonic solution containing 8% salt. Firstly, A HYPERTONIC SOLUTION is that solution which contains a higher solute concentration than that of the intracellular environment.
Due to this concentration gradient i.e. difference in concentration, OSMOSIS process will be triggered. Osmosis is the movement of water from the region of low solute concentration (the leaf cells) to a high solute concentration (the salt solution) via a semi-permeable membrane (cell membrane).
Therefore, osmotic process causes water to move from the leaf cells into the salt solution via the cell membrane. hence, causing the cells of the leaf to shrink.
Calcium and phosphate are important parts of the bone matrix because they:
A provide flexibility to bone.
B promote the formation of cartilage.
C provide strength and durability to bone.
D produce blood cells in the bone marrow.
Answer: it’s c
Explanation:
Answer: provide strength and durability to bone.
Explanation:
What are some way scientists
and engineers can
communicate information?
Answer: Some many talk face to face, email, phone discussions, or even text and blog. Scientists present their findings through conference presentations, peer-reviewed journals, and books.
Explanation:
How can you decrease your height in under a week?
Organize the following groups of elements in order from least to most electronegative (Chromium, Zinc, Tungsten, lodine ) piz help me
Answer:Zinc 1.65
Chromium 1.66
Tungsten 2.36
Iodine 2.66
Zinc 1.65, Chromium 1.66, Tungsten 2.36 and Iodine 2.66
What is electronegativity?The term "electronegativity" describes how attracted an atom is to the bonding electrons in molecules as opposed to other atoms.
American chemist Linus Pauling developed a set of dimensionless variables known as electronegativity values that vary from a little under one for alkali metals to a maximum of four for fluorine.
Electropositive elements are those that are on the left of the periodic table and have low electronegativities. We shall use the key attribute of the order of electronegativities F > O > N > C to explain the chemical properties of organic molecules.
Therefore, Zinc 1.65, Chromium 1.66, Tungsten 2.36 and Iodine 2.66.
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What would be most likely to happen if some of the proteins in one of the photo systems were to change shape due to rise in cell ph
Predicting how the utilization of nonrenewable resources impacts the dom in the deep ocean
system?
Answer:
Non-renewable energies such as those derived from oil affect the seabed in a serious and lethal way for its fauna / flora.
When oil fields are drilled or when they have losses, they flood the seas with oil, these seas, having living organisms, will be directly affected in a lethal way by this unexploited fuel.
In addition, petroleum derivatives such as naphtha are used for water cars such as boats that pollute the water
Explanation:
Environmental awareness led to the search for an alternative as a source of energy that are renewable sources, which make a lot of competition today to polluting or non-renewable sources.
In addition, it must be considered that the pollutants have a limit, since they are exhausted, and on the other hand, an economy that solvent and supports all the expenses of the extraction of these from the depths of the seas is needed.
Answer: When coal and oil are burned, they release particles that can pollute the air, water, and land. ... Burning fossil fuels also upsets Earth's “carbon budget,” which balances the carbon in the ocean, earth, and air. When fossil fuels are combusted (heated), they release carbon dioxide into the atmosphere.
Explanation:
Which human activity is correctly paired with its likely future consequence?
overfishing in the Atlantic - increase in supply of flounder and salmon as food for people
2.
development of electric cars or hybrid vehicles - increased rate of global warming
3
use of fossil fuels - depletion of underground coal, oil, and natural gas supplies
4
genetically engineering animals - less food available to feed the world's population
Consider a real city that wants to build a new school. The city is located in a hot, urban climate in an area prone to hurricanes. List at least 2 criteria and 2 constraints related to the problem. For each, describe why it is important or relevant for the targeted audience.< /p>
Answer:
Let's consider Florida is the city that wants to build a new school and Florida having hot climate and one of the most prone city to hurricanes.
Two criteria to build the building are:
The physical geometry of the building is very important while making it. The building design should have square, hexagonal or even octagonal floor plans along with multiple slopes. The design gives strength to the building to stand in the strong winds.Use of shutters and louvers, that will restrict the entry of heat inside the building and building will remain cool.Two constraints to build the building:
Students are not safe in such area or areas because natural disasters can hit anytime.The cost of construction in such areas will be very high.If the cost of food increases, what can we assume about it's production? A. It has gone down. B. It has gone up. C. Nothing and D. None of the Above
Answer:
B
Explanation:
Answer:
b
Explanation:
might be wrong
In Hawaii, new land forms when lava erupts from Kīlauea volcano and hardens. The new land is without any living things. The first organisms to populate the surface of that new land are known as species. With time, a series of changes called succession occur on the new land through which it becomes colonized by a variety of organisms.
Answer:
Primary succession
Explanation:
The new landforms that are devoid of any vegetation have barren and rocky environment are colonized by the first plant species like grass and moss is called as primary succession which changes with time and occurs on new lands that not colonized yet and later on gets colonized a variety of organisms.true or false?
with explanation
Answer:
true
Explanation:
the body has the means of producing insulin but cannot due to either a hormonal imbalance or deficiency thus raising their levels
If a star is 300 light-years from Earth, how long does it take light from that star to reach Earth?
Answer:It would take 300 years.
Explanation: Light years are how much light travels in a year. Thus it would take 300 years for light to travel to earth if a star is 300 light years away.
Answer:
300 light years! :)
Explanation:
i hope this helps you! <3
3. What are 3 examples of proteins and what functions do they serve in organisms' bodies?
Answer:
ADN, ARN and Cytoplasma
Explanation:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation. Transcription is the transfer of genetic instructions in DNA to mRNA in the nucleus. ... After the mRNA is processed, it carries the instructions to a ribosome in the cytoplasm.
Answer:
HORMONES are chemical-signaling molecules, usually small proteins or steroids, secreted by endocrine cells that act to control or regulate specific physiological processes, including growth, development, metabolism, and reproduction. For example, insulin is a protein hormone that helps to regulate the blood glucose level.
ENZYMES which are produced by living cells, are catalysts in biochemical reactions (like digestion) and are usually complex or conjugated proteins. Each enzyme is specific for the substrate (a reactant that binds to an enzyme) it acts on. The enzyme may help in breakdown, rearrangement, or synthesis reactions.
TRANSPORT Carry substances in the blood or lymph throughout the body
Explanation:
Help me identify the parts of this cell:
Answer:
1- membrane
2- ribosomes
3- mitochondrion
4- rough ER
5- dna
6- nucleolus
7- cytoplasm
8- nucleus
9- smooth ER
10- vesicles
11- golgi body
12- lysosome
Explanation:
Answer:
1- cell membrane
2- ribosomes
3- mitochondria
4- rough endoplasmic reticulum
5- deoxyribonucleid acid (dna)
6- nucleolus
7- cytoplasm
8- nucleus
9- smooth endoplasmic reticulum
10- vesicles
11- golgi apparatus
12- lysosome
Explanation:
what are the steps for the respiratory system?
Answer:
Other components of the respiratory system conduct air to the lungs, such as the trachea (windpipe) which branches into smaller structures called bronchi. The process of breathing (respiration) is divided into two distinct phases, inspiration (inhalation) and expiration (exhalation).
Answer:
The primary organs of the respiratory system are the lungs, which function to take in oxygen and expel carbon dioxide as we breathe.The gas exchange process is performed by the lungs and respiratory system. Air, a mix of oxygen and other gases, is inhaled.In the throat, the trachea, or windpipe, filters the air. The trachea branches into two bronchi, tubes that lead to the lungs.Once in the lungs, oxygen is moved into the bloodstream. Blood carries the oxygen through the body to where it is needed.Red blood cells collect carbon dioxide from the body’s cells and transports it back to the lungs.An exchange of oxygen and carbon dioxide takes place in the alveoli, small structures within the lungs. The carbon dioxide, a waste gas, is exhaled and the cycle begins again with the next breath.The diaphragm is a dome-shaped muscle below the lungs that controls breathing. The diaphragm flattens out and pulls forward, drawing air into the lungs for inhalation. During exhalation the diaphragm expands to force air out of the lungs. Adults normally take 12 to 20 breaths per minute. Strenuous exercise drives the breath rate up to an average of 45 breaths per minute.
Analyze the diagram below. Which of the terms best describes it?
Answer:
disaccharides
Explanation:
they are formed by linking 2 monosaccharides through condensation
monosaccharides are simple sugars or glucose
Disaccharides are those types of carbohydrates that, when hydrolyzed by acids or enzymes, produce two molecules of monosaccharides that may or may not be identical. Thus, option A is correct.
What is important in formation of disaccharides?Mono- and disaccharides, sometimes known as sugars, make up a significant portion of the carbohydrates included in food.
Disaccharides function similarly to other carbohydrates as a source of energy for the body.
When we consume foods containing disaccharides, our systems convert them into monosaccharides, or simple sugars, for absorption in the small intestine.
This condensation process is also referred to as a dehydration reaction, since a water molecule is released during this process.
Therefore, disaccharide is formed from monomeric subunits.
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1. What is the density of an object that has a mass of 1,470 g and volume of 42 mL?
Answer:below
Explanation:
ρ = m/V=
1470 gram/42 milliliter
= 35 gram/milliliter
= 35000 kilogram/cubic meter
what is one reason to support a national DNA database
ASAP Please!
Yeast contained in bread dough completes anaerobic respiration and causes the bread to rise. Which gas released by the yeast causes the bread to rise?
Group of answer choices
Oxygen
Carbon
Nitrous Oxide
Carbon Dioxide
Answer: Carbon Dioxide
Explanation:
Answer:
Carbon Dioxide
Explanation:
did the studyisland :)
What is the difference between facilitated diffusion and active transport?
Facilitated diffusion uses ATP and moves substances with the concentration gradient; active transport does not.
Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Active transport uses ATP and does not require a carrier protein; facilitated diffusion does neither.
Facilitated diffusion uses ATP and requires a carrier protein; active transport does not.
Answer:
Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Explanation:
Active transports moves against the concentration gradient (hence why it needs energy or ATP to do so, its going "against the grain"). Facilitated diffusion does not require ATP but does something require carrier proteins during passive transport.
What is one way that creativity made up for limited technology for early biologists?
Scientists created unique experiments for exploring living organisms without killing them.
Scientists personally designed the custom equipment they needed for their experiments.
Scientists were able to use their imaginations rather than experiments to answer questions.
Scientists developed advanced mathematics to compensate for limited technology.
Answer:
A
Explanation:
Edge2020
Please help me identify the parts of this cell: No trick answers please
Answer:
1- membrane
2- ribosomes
3- mitochondrion
4- rough ER
5- dna
6- nucleolus
7- cytoplasm
8- nucleus
9- smooth ER
10- vesicles
11- golgi body
12- lysosome
Explanation:
What are the levels of organization within the earth system
Answer:
Organelles -> Cells -> Tissues -> Organs and Organ Systems -> Organisims, Poupulation and Communties -> Ecosystems -> The Biosphere
Explanation:
The level of organization from lower to higher are atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystems, biomes and biosphere.
What is ecosystem ?An ecosystem is the unit of ecology, a structural and functional unit of where the living organisms dwell with each other and with their surrounding environment and the term was coined by A.G.Tansley, an English botanist, in 1935.
The structure of an ecosystem can be up two types such as Biotic Components and Abiotic Components, both the components are interrelated where the flow energy and components occur throughout the boundaries.
Biotic components belongs to all living components which can be classified into autotrophs, heterotrophs and saprotrophs. Autotrophs are the producers like plants which make food independently by photosynthesis.
The organisms that depend on other organisms for their food called as consumers or heterotrophs, it can be classified into primary consumers, secondary consumers and tertiary consumers.
Primary consumers are herbivores, Secondary consumers get energy from primary consumers can be either carnivores or omnivores. Tertiary consumers get energy from on secondary consumers.
Quaternary consumers prey on tertiary consumers, Decomposers include saprophytes such as fungi and bacteria depend on dead and decaying matter.
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Please help I’ll do anything nowwwe
Answer:
Exocytosis definition and purposes. Exocytosis is the process by which cells move materials from within the cell into the extracellular fluid. Exocytosis occurs when a vesicle fuses with the plasma membrane, allowing its contents to be released outside the cell.
Explanation:
I hope this helps some. Please give Brainliest!
What is a phenotype???
Answer:
the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
A genotype is the genetic constitution of an individual organism.
Explanation:
Question 19 (2 points)
Enzymes are not considered to be reactants in a chemical reactions because
Answer:
they are needed for activation energy.
Explanation:
If they are needed for activation energy. Just like you don't say chloroplasts are a reactant in photosynthesis.
Inheritable genetic variations may result from____
mutations caused by factors in you environment
mitosis may cause new genetic combinations
replication errors
Answer:
Inheritable genetic variations may result from mutations caused by environmental factors
Explanation:
Because mutations are caused by environmental factors.