Which of the following are chemical changes? Select all correct
answers.
A. table salt dissolving in water
B. a liquid evaporating to form a gas
I C. a force causing a sheet of metal to bend
D. wooden logs burning to form ash
E. hydrogen and oxygen forming water
Answer:
D and E
Explanation:
The others are physical methods and can be separated again.
Hope this helps :)
Ashes (which are made of carbon), carbon dioxide gas, water vapor, heat, and light are produced when wood is burned. Since this change cannot be undone, it is a chemical change. Since oxygen and hydrogen unite to create a single product, Thus option D and E is correct.
What is chemical changes?A chemical change is the transformation of one substance into another, the emergence of new compounds with distinct properties, or any combination of these.
It happens when two compounds mixes to create a new material (synthesis or either decomposes to form more substances).
Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance.
These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.
Therefore, burning of wooden logs and formation of water is an example of chemical changes.
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explain how animal cells differ from plant cells with respect to the effects of net water movements
Answer:
Terms in this set (4) Animal cells do not have a cell wall, meanwhile plant cells do have a cell wall. As a result, water passes freely in an animal cell due to osmosis. In a hypotonic solution, there is more free water outside the cell than inside the cell.
Your model should clearly illustrate cellular division (mitosis) as well as differentiation into specialized cells
can someone tell me what to draw i really dont kno?
Cellular division (Mitosis) is the biological process whereby a parent cell breaks itself into different parts called daughter cells.
This process is important because it helps to divide cells so that they can:
Experience growthRepair broken cellsReproduce, etcCellular differentiation is the process of a cell going from one form to a more specialized cell.
A good example of this is the process of a fetus being formed from a single celled zygote.
Attached below is an image of cell differentiation and cellular division.
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how does the ph of soil affect plant growth experiment of a succulent plant (plz help)
which best explains the mechanism that allows for cell differentiation ?
Answer:
Cellular differentiation
Explanation:
Passive Transport- high concentration to low concentration examples?
You're eating a bowl of
fruit but you're starting to
feel full.
Answer:because it has low energy density an lots of fiber it helps you feel full longer
Explanation: fruit recommended
True of false: The wings on an airplane are flat.
1. False
2. True
Answer:
False
Explanation:
An airplane wing is round on top.
What is the advantage of sexual reproduction?
what is the advantage of sexual reproduction?
Answer:
The advantage is that it creates a new generation and furthers the growth of a species.
Explanation:
HELPPPP PLEASE ITS DUE IN LIKE 15 minutes..... please helppp
Answer:
2 Should be b, 3 Should be a and 6 Should be e
Explanation:
I aced my biology final
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:
n what area do you feel you made your biggest improvements?
This is supposed to be a personal opinion answer.
Glucose is broken down in the cytoplasm of the cell. What is
this process called?
Answer:
glycolysis hope this helps <3
Explanation:
In stage one, glucose is broken down in the cytoplasm of the cell in a process called glycolysis. In stage two, the pyruvate molecules are transported into the mitochondria
Answer:
glycolysis
Explanation:
Which of the following best describes the flow of energy in the Everglades food web shown below? (4 points)
Diagram for an everglades food web. The food web contains the following organisms: American alligator, egret, raccoon, carp, Key deer, insects, Southern leopard frog, mangrove, and sawgrass. Mangrove is at the bottom of the food web, with arrows pointing to Key deer and insects. Sawgrass is also at the bottom of the web, with an arrow pointing to insects. Key deer, insects and Southern leopard frog are on the next level up. The Key deer has an arrow pointing to American alligator. The insects point to egret, carp, and Southern leopard frog. The Southern leopard frog points to the American alligator and the raccoon. The egret, carp and raccoon all points upward toward the American alligator. The carp also points to the egret. The American alligator is at the top of the food web.
a
Egret → insects → mangrove → key deer → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level.
b
Mangrove → insects → carp → American alligator; about 90 percent of the energy in one trophic level is transferred to the next trophic level.
c
Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
d
American alligator → carp → insects → mangrove; about 10 percent of the energy in one trophic level is transferred to the next trophic level.
Answer:
B
Explanation:
For B it simply had the table in order of words.
Energy will flow in this order . Sawgrass → insects → Southern leopard frog → raccoon → American alligator; about 10 percent of the energy in one trophic level is transferred to the next trophic level. Hence, option B is correct.
What is a food web?All the food networks in a single ecosystem make up a food web. Each organism in an ecosystem is a link in a number of food chains. Energy and nutrients can go along different food chains as they move through the ecosystem.
The trophic levels are divisions into which organisms in food webs are categorized. These levels can be roughly categorized as producers (first trophic level), consumers, and decomposers (last trophic level).
Only 10 percent of energy transfers to the next level. Hence, option B is correct.
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Are proteins biotic or abiotic? Explain your reasoning. I WILL MARK BRAINLIEST!
Once the neuron is excited, how
does the message pass down the
axon to the knob?
A. Through potassium
B. Through the glia cells
C. The sodium pump
GUYS PLS HELP
Answer: C. The sodium pump
Explanation: Acellus
Costal Regions experience moderate temperatures because winds prevent extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible?
A. From the land to the ocean
B. From the ocean to the land
C. Parallel to the ocean
Answer:
From the ocean to land
Explanation:
got it right on edge
From the ocean to the land the extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible.
What is Coastal regions?A significant and expanding share of the world's population lives in coastal regions, which are experiencing environmental deterioration. In underdeveloped nations, the issue is very severe.
Although there are many different causes of environmental decline, population issues are a major contributing element. The majority of the world's population, about 3 billion people, now reside 200 kilometers or less from a shoreline.
That number is probably going to quadruple by 2025. Numerous economic advantages have resulted from the high population density in coastal regions, including enhanced transit infrastructure, urban and industrial growth, and increased revenue.
Therefore, From the ocean to the land the extreme temperatures in these regions which direction of wind makes peace moderate temperatures possible.
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what is ostia in biology
Answer:
An ostium (plural ostia) in anatomy is a small opening or orifice.
Explanation:
Simple term for explaining an opening
Certain bacteria live in the intestinal tract of other organisms. Which of the following statements describes how these microorganisms help maintain the health of other organisms?
A) They produce antibiotics which destroy other microorganisms.
B) They decrease the amount of vitamins in the large intestine.
C) They purify food as it travels through the digestive system and remove contaminants.
D) They metabolize substances and break down food during digestion
Answer:
D
Explanation:
Many bacteria are known for helping humans digest and metabolize foods that we wouldn't be able to do without them.
How does the destruction of tropical rainforests relate to the greenhouse effect
GUYS PLEASE 1. What is the smallest unit of a molecular compound with the properties of that compound?
Answer:
An atom is the smallest particle of an element while the molecule is the smallest particle of a compound.
A student wants to investigate the force of gravity. The student has an apple and a marble. What would be the best way for the student to use these materials? Place the apple on the floor. Roll the marble so it hits the apple. Put both objects on a desk. Push them forward at the same time. Hold both objects at the same height above the floor. Drop them at the same time. Place the marble on a desk. Place the apple next to the marble so the objects touch.
Answer:
Put both objects on a desk
Explanation:
The best way to use the materials to investigate the force of gravity would be to put both objects on a desk. The force of gravity can thus be obtained by measuring the distance between the objects as well as their masses.
According to Newton's law of universal gravitation, the force of gravity (F) between two objects is directly proportional to the product of their masses (m and M) and inversely proportional to the square of the distance (d) separating them.
Mathematically,
F = G [tex]\frac{mM}{d^2}[/tex] where G is a constant.
Please help I am stuck
Recreate the sequence that occurs in the carbon cycle beginning with carbon dioxide gas.
combustion
atmosphere
soil organic matter
fossil fuel
plant biomass
↓
?
↓
?
↓
?
↓
?
Answer:
Carbon cycle is very important for the plants and animals that are divided into 4 steps and these steps are:
1.The carbon enters the atmosphere in the form of carbon dioxide.Example: respiration and combustion.
2.The carbon dioxide present in the environment is used by the plants and plants expel oxygen after the process of photosynthesis.
3. Animals present in the environment eat the plants and pass on the carbon in the food chain. They exhale carbon dioxide into the environment.The plants and the animals die after a certain period of time.
4. The body of plants and animals is consumed by decomposes and the carbon is returned into the atmosphere in the form of carbon dioxide else fossils of plants and animals are formed which contains carbon.
Explanation:
did the quiz
Can you see radio waves? How does their position on the electromagnetic spectrum demonstrate this?
Explanation:
no, we can not see radio waves. radio waves have the longest wavelength out of all the waves on the electromagnetic spectrum. we can only see visible light, which is towards the middle of the spectrum. the waves below or above visible light on the spectrum have wavelengths that are too long or short for the human eye to detect.
If the object shown has a mass of 80g, what is the density?
Answer:
C. 1.23 g/ml
Explanation:
[tex] Density = \frac{Mass}{Volume} [/tex]
Mass of rock = 80g
Volume of rock = final fluid volume - initial fluid volume
Volume of rock = 265 cm³ - 200 cm³ = 65 cm³
[tex] Density = \frac{80g}{65 cm^3} [/tex]
[tex] Density = 1.23 g/cm^3 [/tex]
1 cm³ = 1 ml
Therefore, density of the object = 1.23 g/ml
How do limiting factors most affect population size? stop population growth restrict population growth increase population growth decrease population growth
Answer:
restrict population growth
Explanation:
Limiting factors of a population are those factors that constrict the growth of the population. They often act as a check on population growth.
Some of these limiting factors are:
Food Water Habitat of organismsFrom the giving choices, limiting factors have been clearly shown to inhibit population growth.
The lack of some of these factors checks the population, thereby impeding its growth.
Answer:
How do limiting factors most affect population size?
restrict population growth
Explanation:
correct on edge unit test
Lori is a vegan who believes she gets all the nutrients she needs from her diet. She has never taken supplements, even when she was pregnant. Her baby, Mason, was born full-term, but with a small portion of his spinal cord protruding through his vertebrae, resulting in partial paralysis of his legs. This neural tube defect, called , may have been caused by Lori's insufficient intake of during pregnancy. This micronutrient is necessary for regenerating the active form of .
Answer:
The condition is called "Spinal Bifida", caused by lack of vitamin B12 which helps regenerate the active form of folate.
Explanation:
Because Lori is a vegan, her vitamin B12 intake which comes from animal products such as meat, is not enough. She has to take supplements to make up for the lack of it in her diet.
As stated in the question, this lack of vitamin B12 causes her child to have a defect in his spinal cord called Spinal Bifida that defines a spinal cord or spine that has not fully developed. The vitamin B12 is necessary for regenerating the active form of folate.
I hope this answer helps.
where did the extra chromosome in down syndrome come from?
Which statement best describes why the population growth rate slows as population size approaches carrying capacity?
O reproduction increases
O predation rates decrease
evolution of traits decreases
competition for resources increases
Answer:
competition for resources increases
Explanation:
When an ecosystem reaches its carrying capacity, competition for scarce resources become more intense.
The result of this is that species will either begin to die, or migrate away from the ecosystem leading to a decrease in population growth
which product does the Krebs cycle require from the electron transport chain
ATP
CoA
NAD
NADH
pyruvate
NAD +molecule
Explanation:
Krebs cycle and electron transport chain are important steps in cellular respiration.
In the Krebs cycle, there is a need of NAD+ molecule which is then in Krebs cycle reduced to form a NADH2 molecule.
NADH2 is also an energy currency. It , giving electron in electron transport chain and return to Krebs cycle as NAD+.
Now in the Krebs cycle, it is ready to take electrons again.
Answer:
NAD+
Explanation: