Answer:
please mark me brainliest
Explanation:
Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. ...
Know emergency exit routes.
Avoid skin and eye contact with all chemicals.
Minimize all chemical exposures.
No horseplay will be tolerated.
Assume that all chemicals of unknown toxicity are highly toxic.
Answer:
Rule #1 - WALK
Rule #2 - PROPER LAB ATTIRE
Rule #3 - HANDLING CHEMICALS
Rule #4 - HANDLING EQUIPMENT
Rule #5 - BROKEN GLASS
Rule #6 - EYE WASH/SHOWER
Rule #7 - FIRE SAFETY
Rule #8 - EATING/DRINKING IN LAB
Rule #9 - CLEANING UP
Rule #10 - HAND WASHING
Explanation:
pls help
Me with the right answer
Answer:es la b
Explanation:por que los homungulos no hacen parte e de eso
Answer:
Now I do not know for sure but I think it might be D, or C. I'm sorry I couldn't be of more help by specifying it.
Explanation:
use the following terms in the same sentence:prokaryotic,nucleus and eukaryotic
While eukaryotic cells have a membrane-bound nucleus, prokaryotic cells do not.
hope this helps:)
Which of the following phrases best describes a solvent?
A) can be dissolved by the solute
B) has a high concentration of solutes
C) usually a sugar or protein
D) present in a greater concentration that solutes
A solvent is a substance present in a greater concentration than solutes (Option D).
A solvent is a substance (usually a liquid) that dissolves another substance/s in order to form a solution.The solvent has the ability to dissolve other substances present in the solution that are referred to as solutes.Some of the most common solvents include water, ethanol and methanol.In conclusion, a solvent is a substance present in a greater concentration than solutes (Option D is correct).
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In terms of the scientific method, the purpose of an experiment is:
Which of these is a quantitive measure of fitness?
A-The time taken to run a mile
B-A persons weight
C- whether a person can touch their toes
D-how much weight a person can lift
Answer:
A. The time taken to run a mile
hope that helps uh..☺
which organelles have their own dna
Answer:
Chloroplasts and mitochondria are subcellular bioenergetic organelles with their own genomes and genetic systems.
Lab: Diffusion Across a Semi-permeable Membrane Click the links to open the resources below. These resources will help you complete the assignment. Once you have created your file(s) and are ready to upload your assignment, click the Add Files button below and select each file from your desktop or network folder. Upload each file separately. Your work will not be submitted to your teacher until you click Submit.
Answer:
what is the question. ??
Answer:
Experiment to demonstrate diffusionmaterials:a 250cm³ glass beaker,a long tube,a holed rubber bung or stopper,a colored crystal such as potassium permanganate and water.method: set up the experimentfirst insert one end of the tube halfway into the rubber stopper place the rubber stopper and glass tube into the beaker, keeping the rubber firmly pressed to the bottomintroduce the colored crystal of potassium permanganate down the tubeclose the open end of the glass tube with a finger and fill the beaker halfway with waterwith one end of the glass tube still closed,gently lift the glass tube and rubber stopper out of the beaker without disturbing the crystalobserve what happens in the beaker until there are no further changesobservation: at the beginning,the clear water and colored crystal are each clearly visibleafter sometime,the color of the crystal starts spreading out of the water still remains cleareventually,all the water is evenly colored by the color of the crystalconclusionthe particles spread out in the water by the process of diffusion.I hope this helps
Mr. Doe wanted to perform an experiment to determine if doing a class review before a test would increase test scores. Mr. Doe normally does not review. To perform this experiment, Mr. Doe reviewed material with 2nd period before a test and did not review with 3rd period. After grading papers, he found that 2nd period had an average grade of 93 and 3rd period had an average grade of 72. He determined that reviewing before a test might increase test scores. 2. Which of the following is the control group?
Answer:
3rd Period
Explanation:
2nd period reviewed material with Mr. Doe
3rd period did NOT reviewed material with Mr. Doe
Experimental group is the group being affected.
Control group is the group not being affected.
Louis Pasteur demonstrated that people could be vaccinated against smallpox through
exposure to cowpox.
A. True
b. False
Answer:
Explanation:
It's false
this is urgent ill give you brainliest and 25 ponts but helppp
i need a hypthosis idea and an experiment that might prove it
i dont want one thats over popular
im free to any kind of hypotheses not just science
a naturally occurring, inorganic solid that has a crystal structure & a definite chemical composition.
a
A. All of these
B. precipitate
C. mineral
D. rock
Mineral is a naturally occurring, inorganic solid that has a crystal structure & a definite chemical composition.
Fuentes no renovables de la naturaleza
Explanation:
Se denomina fuentes de energía no renovables a aquellas que se encuentran en la naturaleza en cantidades limitadas. No se regeneran o lo hacen en forma extremadamente lenta. Fuentes de energía no renovables son los combustibles fósiles y los isótopos radiactivos utilizados en la energía nuclear.pls mark me branilest
DNA and Rna are macromolecules made up of what?
Answer:
Nucleotides
Explanation:
"These macromolecules consist of a large number of linked nucleotides, each composed of a sugar, a phosphate, and a base."
Hope this helps:
DNA, RNA, and the Flow of Genetic Information
https://www.ncbi.nlm.nih.gov/books/NBK21171/
DNA and RNA are macromolecules made up of units called nucleotides.
What are nucleotides?A nucleotide is the most fundamental element of nucleic acids (RNA and DNA). A sugar molecule (ribose in RNA or deoxyribose in DNA) is bonded to a phosphate group and a nitrogen base to form a nucleotide. Adenine (A), cytosine (C), guanine (G), and thymine (T) are the bases that make up DNA. The base uracil (U) replaces for thymine in RNA. Long chains of nucleotides make up DNA and RNA molecules, which are polymers.
hence nucleic acids like DNA and RNA are made up of nucleotides
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Converts energy from food into energy a cell can use
Answer:
through a process called cellular respiration
Explanation:
the state of change between mechanical to chemical in the body,to boost the body functions.
6. The plant tissue that carries sugar from the
leaves to the roots is the
Answer:
phloem
Explanation:
I am pretty sure that this is right and the xylem carries the water. I hope this helps!! I am sorry if it is worked wrong.
The force that pulls planets toward the Sun is called
gravity
magne
Offerentiation
Answer:
The force that pulls planets towards the Sun is called gravity.
When 1 carbon atom combines with2 oxygen atoms, the resulting substance is called a(n)
Answer:
Carbon Dioxide
Explanation:
Carbon Dioxide consists of one carbon atom and two oxygen atoms.
1.What are heterotrophs? How do heterotrophs get their food?
2.What are autotrophs? How do autotrophs get their food?
Answer:
Heterotroph is an organism that is unable to synthesize its own food,
they depends on autotrophs and others animal for their food
An autotroph is an organism that can make its own food by the
process of photosynthesis is called autotrophs
they get their food by photosynthesis
Use your knowledge of Protein Synthesis, and the provided chart, to identify the
correct Amino Acid sequence from the mRNA strand: AGUUGGUCUGUA
A: serine, tryptophan, serine, valine
B: aspartic acid, valine, leucine, asparagine
C: leucine, histinde, glutamic acid, leucine
D: serine, threonine, arginine, aspartic acid
Answer:
A: serine, tryptophan, serine, valine
Explanation:
Hi there!
Protein Synthesis is the process where proteins are created from DNA.
We are given the mRNA strand AGUUGGUCUGUA, as well as a provided chart
The mRNA strand is created out of nucleotides (each of the letters is one nucleotide in the code), which will code for a specific chain of amino acids, creating a protein.
Each amino acid is made up of 3 nucleotides. This sequence of 3 nucleotides is called a codon.
So we can break up the code into groups of 3, to make identifying the codons easier.
AGU UGG UCU GUA
Now we need to figure out which amino acid each codon codes for. Thankfully, we were given a chart that can help us with that.
The chart is read where the first base is on the left, and is vertical. The second base is in the center, yet is horizontal. The third base is on the right, and is also vertical.
Let's start with the first codon, which is AGU
The first base is A. The second base is G, and the third base is U. So the first amino acid is serine (ser)
The second codon is UGG.
The first base is U, the second base is G, and the third base is G. So the second amino acid is tryptophan (trp)
The third codon is UCU
The first base is U, the second base is C, and the third base is U. So the third amino acid is serine (ser)
The fourth codon is GUA
The first base is G, the second base is U, and the third base is A. So the fourth amino acid is valine (val).
That means the amino acid sequence from the mRNA code is: serine, tryptophan, serine, valine. The answer is A
Hope this helps!
Match each part the cell to is structural features
A. larger size in plant cells
B. Salt and water base
C. Grainy appearance
D. permeable and flexible
Matches are below
Cytoplasm
Cell membrane
Rough endoplasmic reticulum
Vaculoe
Answer:
A). Vacuoles B). Cytoplasm C). Rough Endoplasmic Reticulum D). Cell membrane
Explanation:
The plant has the largest vacuole than animal cells. The cytoplasm is mostly composed of water, salts, and proteins. It is one out of 2 types of endoplasmic reticulum, characterized by the appearance of the ribosomes that give it a grainy appearance. The cell membrane is made of millions of smaller molecules that create a flexible and permeable container.
Okazaki fragments are best described as:
A. short segments of DNA formed on the leading strand.
B. cause by the DNA Helicase building in the 3 to 5' direction.
C. short segments of replicated DNA formed on the lagging strand.
O
D. caused by the single strand binding proteins moving in away from the replication fork.
DNA replication occurs only in 5'-3'. Option C. Okazaki fragments are best described as short segments of replicated DNA formed on the lagging strand.
What is an Okazaki fragment?During DNA replication, the molecule unwinds and the two strands get separated.
Different enzymes and proteins are involved in the replication fork formation, such as helicase (enzyme needed to break hydrogen bonds and separate the two original strands) and topoisomerase (enzyme that releases tension).
DNA polymerase makes the new nucleotides enter the fork and pairs them with the corresponding nucleotide of the original strand. Adenine pairs thymine, and cytosine pairs guanine.
Since DNA strands are antiparallel and replication occurs only in 5'-3' direction, one of the strands will replicate continuously, while the other strain will be replicated by short fragments known as Okazaki fragments.
Okazaki fragments are only formed on the lagging strand.
According to this framework, the correct option is C. short segments of replicated DNA formed on the lagging strand.
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without an enzyme, the reaction requires _______ activation energy.
lowering the activation energy of the reaction.
why is going 55mph a good thing?
Answer:
Congress imposed the 55-mph limit in 1974 as a fuel-conservation measure, which it is; federal officials estimate it conserves about 9 million gallons of gasoline a day. ... The best estimate is that it has helped save the lives of about 36,000 people in the last five years
Define normal distribution.
Answer:
a function that represents the distribution of many random variables as a symmetrical bell-shaped graph.
Explanation:
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Explain why variation is an advantage for a species such as the common emerald dove
Explanation:
Having variation within a species means that if the environment changes there may be individuals within the species more able to withstand the change and survive.
Variation refers to the differences between members of the same species. There is usually extensive genetic variation within a population of organisms or a species.
The common emerald dove (Chalcophaps indica), also called asian emerald dove and grey-capped emerald dove, is a widespread resident breeding pigeon native to the tropical and subtropical parts of the Indian Subcontinent and Southeast Asia, the dove is also known by the names of green dove and green-winged pigeon. The common emerald dove is the state bird of the Indian state of Tamil Nadu. The Pacific emerald dove and Stephan's emerald dove were both considered conspecific.
MN
Which element has four valence electrons?
(1 point)
O beryllium (Be)
O potassium (K)
O sulfur (S)
O silicon (Si)
Answer:
O silicon (Si)
Explanation:
-Valence electrons are electrons of the outermost shell which can participate in chemical bonding. ... -As in silicon, four electrons are present in the outermost shell, so silicon has Four valence electrons.
Among the options given in the question, the element that has four valence electrons is known as Silicon. Thus, the correct option for this question is D.
What are Valence electrons?Valence electrons may be defined as the number of electrons that are present in the outermost shell of an element. These electrons actively take part in chemical bonding due to the sharing and pairing of electrons.
The atomic number of beryllium is 4, it has valance electrons of two. Potassium has an atomic number of 19, it has a valence electron of one. Sulfur possesses an atomic number of 16, it has valence electrons of six. While Silicon has an atomic number of 14, its electronic configuration is 2, 8, and 4. So, it has valence electrons of four.
Therefore, the element that has four valence electrons is known as Silicon. Thus, the correct option for this question is D.
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Identify the type of tissue in the following:
Skin, bark of tree, bone, lining of kidney tubule, vascular bundle
Answer:
Skin = Epithelial tissue
Bark of tree = Cork
Bone = Connective tissue
Lining of kidney tubule = Simple cuboidal epithelium
Vascular bundle = Xylem and Phloem
Describe how the conditions under which rocks form affect the physical stability of rocks.
Answer:
The conditions that affect physical stability are heat, temperature, compression, pressure, and the molecular structure. The base of the intrusion is parallel to the rock layer beneath it.
Help me plz
What is an everyday problem you could use the scientific method to solve? Include what steps of the method would look like for this problem.
Answer:
observation : a toaster doesn't work
question : is something wrong with the electrical outlet
hypothesis : something is wrong with the outlet my coffee maker also won't work and plug into it
experiment : I plug my coffee maker into the outlet
result : a coffee maker works
2nd result : my toaster is broken
what is astraphobia...............
Answer:
Astraphobia, also known as brontophobia, is a kind of phobia characterized by an intense fear of extremely loud but natural noises in the environment. Namely, lightning and thunder.