Answer:
It is still identified as the same substance. In this case, since melting the gold bar is a change that takes place when the solid turns into a liquid, it undergoes a physical change.
Explanation:
This is a physical change. When solid gold melts into a liquid and is poured it will be a physical change.
What is a physical change?There are two types of changes such as physical change and chemical change. In a physical change, there is no change in molecular composition.
In chemical changes, the molecular composition of a substance will change. When gold is turned into a liquid it will melt. This is called a physical change.
In a physical change, the chemical composition of a substance remains the same. The atoms rearrange themselves in physical change.
Therefore, This is a physical change. When solid gold melts into a liquid and is poured it will be a physical change.
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Hybrid inviability and hybrid infertility are two examples of:________.
Answer:
I believe that these two are examples of gametic isolation.
Explanation:
I believe this is the correct answer, however i dont really remember i took this course last year.
Answer:
gametic isolation
Explanation:
Improving muscular strength and endurance slows bone density loss.
a) true
b) false
the flower has 10 petals. Qualitative/Quantitative
Answer:
Qualitative
Explanation:
it is a observation not dealing with it mathematically or including you doing much work.
HELPPPP, i dunno this one!! i need help asap
Answer:
It's adaption, but I don't see it, it could also be behavior. I dunno about this one.
how does performance enhancing drugs work in the human body?
Answer:
hey mate your answer there
which provides long-term energy storage? glycogen, glucagon, glucose, cellulose
The answer is Glycogen, hope this helps
Answer: Glycogen
Explanation:
It's an carbohydrate that acts like a long term energy storage compound inside an animal
convert 140.0 mm to meters and express the answer to the correct number of significant digits.
a.) 0.1450 m
b.) 0.145 m
c.) 145,000 m
d.) 1.450 m
e.) 14.50
Answer:
b.) 0.145 m
Explanation:
Give a scenario where a cell may need to perform a form of endocytosis.
Answer:
A scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. A scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.
How are DNA and RNA related to proteins
Functionally, RNA utilises the protein-encoding information to enable the cell to produce the specific protein, whereas DNA preserves the information.
What is protein synthesis?The process through which cells create proteins is referred to as protein synthesis. The first step is transcription, and then the second step is translation. The process of moving genetic instructions from DNA to messenger RNA (mRNA) in the nucleus of a cell is referred to as transcription. Initiation, elongation, and culmination are the three stages that make up this process.
In a functional sense, DNA is responsible for maintaining the information that codes for proteins, whereas RNA is responsible for putting that information to use in order to permit the cell to synthesize the specific protein.
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if a creature dies without reproducing, how can it help transfer its genes to the next generation? (3-5 sentences please!)
Answer:
it can help to transfer its genes by people taking its DNA and duplicating, and putting it into another animal.
Explanation:
Type of soil that forms in grasslands
Answer:
Mollisols
Explanation:
The soil of the temperate grasslands is deep and dark, with fertile upper layers. It is nutrient-rich from the growth and decay of deep, many-branched grass roots. The rotted roots hold the soil together and provide a food source for living plants.
Answer:
Mollisols
Explanation:
Because these temperate grasslands have cold winters, and warm summers, and have medium to low precipitation. They form in areas that are too dry to be forested, but too wet to be desert. Most of the prairie soils are called Mollisols (latin for soft), because of their deep, dark layer of topsoil.
Is Euglena unicellular?
Answer: yes
Explanation:
Euglena belong to the kingdom Protista, and this kingdom is categorized as unicellular beings.
Answer:
yes
Explanation:
What is the order of steps of protein synthesis
Answer:
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. It includes the steps of initiation, elongation, and termination.
Explanation:
hope this helps
Before DNA is replicated, it reads AGATCGAGT. An external factor causes a mutation to the sequence, and it now reads: AAATCGAGT.
How would the amino acid sequence produced by the mutant strand compare to the amino acid sequence made by the original strand?
codon chart
Group of answer choices
Only one amino acid in the sequence would change.
More than one amino acid in the sequence would change.
The amino acid sequence would be shorter.
The amino acid sequence would remain unchanged.
Answer: only one amino acid in the sequence changes
Explanation: if you change both sequences given to rna sequences in the first one all the amino acids you get are serine. in the second sequence of you change them to rna then do the chart they all are serine but one which is phenylalaine.
What trend has been observed in the fossil record of horses regarding the length of their limbs?
Answer:
The correct answer is : they have generally increased in length.
Explanation:
Fossil records of horses clearly showed that the early horse family was small in body size with short legs which was adapted to the wooded area at that time.
During the period of time horse family adapted to the change according the environment and habitat which was changed from wooded area to grass land. They have increased in length and size of their legs become longer during evolution.
Thus, the correct answer is : they have generally increased in length.
Soon afterwards, Sammy developed a severe intestinal infection. A large portion of his lower intestine had to be removed. It was replaced with an elastic tube made of silicon. Sammy was able to eat almost all the same foods he ate before surgery. Is Sammy Alive? ☐ Yes ☐ No Reason:
This key organelle holds the cell's genetic material, and dictates which proteins the cell produces.
Answer:
nucleus
The function of the nucleus is to regulate gene expression, including controlling which proteins the cell makes. In addition to DNA, the nucleus contains a thick liquid called nucleoplasm that is similar in composition to the cytosol found in the cytoplasm outside the nucleus
Explanation:
Does food have cells
Answer:
yea
Explanation:
A euglena is a unicellular organism. Explain how the euglena's cell parts help it stay alive.
Explanation:
Euglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their own food by photosynthesis. They are not completely autotrophic though, euglena can also absorb food from their environment; euglena usually live in quiet ponds or puddles.
Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water. It is attached at an inward pocket called the reservoir. Color the reservoir grey and the flagellum black.
The Euglena is unique in that it is both heterotrophic (must consume food) and autotrophic (can make its own food). Chloroplasts within the euglena trap sunlight that is used for photosynthesis, and can be seen as several rod like structures throughout the cell. Color the chloroplasts green. Euglena also have an eyespot at the anterior end that detects light, it can be seen near the reservoir. This helps the euglena find bright areas to gather sunlight to make their food. Color the eyespot red.Euglena can also gain nutrients by absorbing them across their cell membrane, hence they become heterotrophic when light is not available, and they cannot photosynthesize.
The euglena has a stiff pellicle outside the cell membrane that helps it keep its shape, though the pellicle is somewhat flexible and some euglena can be observed scrunching up and moving in an inchworm type fashion. Color the pellicle blue.
In the center of the cell is the nucleus, which contains the cell's DNA and controls the cell's activities. The nucleolus can be seen within the nucleus. Color the nucleus purple, and the nucleolus pink.
The interior of the cell contains a jelly-like fluid substance called cytoplasm. Color the cytoplasm light yellow. Toward the posterior of the cell is a star-like structure: the contractile vacuole. This organelle helps the cell remove excess water, and without it the euglena could take in some much water due to osmosis that the cell would explode. Color the contractile vacuole orange.
The cell parts of euglena help it stay alive by the fact that they possess chloroplasts which facilitate them to make their own food by photosynthesis.
What is a Unicellular organism?A unicellular organism may be characterized as a type of organism that significantly consists of a single cell, unlike a multicellular organism that consists of multiple cells. This single cell carries out all of the functions needed by the organism.
Euglena possesses a mixed type mode of nutrition as it can also absorb food from its environment. They move through a flagellum which is a long whip-like structure that acts like a little motor and provides movement.
Chloroplasts within the euglena trap sunlight that is used for photosynthesis, and can be seen as several rod-like structures throughout the cell. In the center of the cell is the nucleus, which contains the cell's DNA and controls the cell's activities.
Therefore, the cell parts of euglena help it stay alive by the fact that they possess chloroplasts which facilitate them to make their own food by photosynthesis.
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Which characteristic of a protein may change during a dna mutation?
Answer:
Sequence of amino acids by the ribosome are the characteristic of a protein may change during a DNA mutation.
Answer:
i think it'll be the shape of it that will change during a DNA mutation.
Explanation:
What is one observation that could be made to support the idea that two rock layers
are the same age?
A. Layers with different fossils
B. Layers of equal density
C. Layers made of the same chemicals
D. Layers with similar fossils
Answer:
D. Layers with similar fossils
Explanation:
Dating consists of ordering geological events according to the time they occurred, which ones occurred first, and which ones occurred latterly. This dating can be done by using the superposition geological principle. This principle states that in a horizontal unperturbed rocky sequence, the oldest layers or stratum are located in the bottom, while the newest ones are more superficially located. Sediments can be incrusted in horizontal layers or stratum. Fossils that are incrusted on these layers represent different ages of the stratum. Different stratum can give us information about the environment in the past. They keep information about the age and the conditions under which the sediments got deposited.
Some geological principles allow us to date, relatively, the age of different geological events in the past.
Sediment layers place in a temporal sequence, let us know that the older layers are located in an inferior position concerning the newer layers. Hence, fossil species placed in more inferior layers are supposed to be older than fossil species found in more superficial layers.
In this sense, those layers or stratum that exhibit the same fossils are believed to be the same age-old.
give an example of a hypothesis not mentioned
Answer:
`12
Explanation:
What factors lead to ecosystem changes such as an increase in pollution global warming and coral reef bleaching?
What happens when humans burn fossil fuels?
Explanation:
When fossil fuels are burned, they release carbon dioxide and other greenhouse gases, which in turn trap heat in our atmosphere, making them the primary contributors to global warming and climate change.
Answer:
The burning of fossil fuels releases carbon dioxide and other greenhouse gases.
Explanation:
Greenhouse gasses can cause climate change by trapping heat, and also contribute to respiratory disease from smog and air pollution.
how to create petroleum
Answer:
petroleum is formed when large quantities of dead organisms, mostly zooplankton and algae, are buried underneath sedimentary rock and subjected to both intense heat and pressure.
True or False: The cells from the "Area of Cell Division" allow the root to grow longer?
Answer:
I'm pretty sure it is true.
Explanation:
how does cell mitosis differ from cytokinesis
Answer:
Mitosis is the division of the nucleus, while cytokinesis is the division of the cytoplasm. They are both two stages in the cell cycle.
Explanation:
Which term describes a pure substance that is made up of only one type of atom?
matter
rock
compound
element
your answer is matter.
I will give brainliest!!!
Chlorophyll a is a critical pigment in plants that not only gives many of them their characteristic green color, but is also important in the process capturing light energy from the sun in order to drive the process of photosynthesis.
What is the most likely cell structure in which chlorophyll a would be located?
Choose 1 answer:
(Choice A)
A
Vacuole
(Choice B)
B
Golgi body
(Choice C)
C
Chloroplast
(Choice D)
D
Mitochondria
Answer:
It would be c
Explanation:
I remember this question when I took floral design.
Answer:
Chloroplast
Explanation: Chloroplasts are the site of photosynthesis, and thus, must contain the chlorophyll a pigment. Additionally, part of the reason they're called "chloroplasts" is because of the presence of the chlorophyll a pigment!
Have a nice day :)
Scientists have observed that when air pollution is significantly reduced, the frequency of the melanic form of peppered moths:______.
Answer:
The correct answer is : decreases
Explanation:
The development of the peppered moth is a transformative event of directional color change in the moth populace as a result of air contamination during the Industrial Revolution.
The melanic or dark color type of the peppered moth was not known before pollution level was low before 1811. Hence the decrease in pollution level in atmosphere will lowers the frequency of the melanic form of peppered moths.
Thus, the correct answer is : decreases.
