Answer:
1. Cytoplasm
2. Plasma membrane
3. Nucleus
4. Mitochondria
Reverse transcriptase is a useful enzyme to have when?
Answer:
Reverse Transcriptase (RT) is essential for HIV replication because the viral RNA genome on its own is highly susceptible to degradation by intracellular RNases. RT rapidly makes a much more nuclease-resistant double-stranded DNA copy of the RNA template that later integrates to form the proviral DNA.
This molecule is used by retroviruses to create DNA by using mRNA as a template. We know that normally transcription is the synthesis of mRNA from DNA. This can be useful in bioengeneering when using a virus as a vector to alter the genetic material of the host.
Describe some global patterns of atmospheric movement that might influence local weather.
Answer:
A mountain range in the path of prevailing winds can influence where precipitation falls. When humid winds blow from the ocean toward coastal mountains, they are forced to rise. The rising air cools and its water vapor condenses, forming clouds
please help!!!!!!!!!!!!
1. **In the procedure shown below, a calcium chloride solution is mixed with a sodium sulfate solution to create the products shown. Which of the following is illustrated by this activity?
a. The law of conservation of mass
b. The theory of thermal equilibrium
C. The law of conservation of energy
d. Newton's 2nd Law
The reaction follows the law of conservation of mass since the mass remains same before and after the reaction. Therefore, option (A) is correct.
What is the law of conservation of mass?According to the principle known as the rule of conservation of mass, during a chemical reaction, mass can neither be created nor destroyed. When coal is burned, for instance, the atom of carbon that it contains transforms into carbon dioxide. The mass of the carbon atom remains constant even as it transforms from a solid structure to a gaseous state.
The study of chemical reactions, as well as their generation, places a significant emphasis on the principle of mass conservation. Scientists are able to make accurate forecasts regarding the amounts of products that will be produced from a certain reaction if they are aware of both the amounts of reactants and their identities.
Thus, in the above reaction the mass is conserved and option (A) is correct.
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Why is it necessary for gametes to be
haploid?
A. to ensure the cell is not too big
B. gametes are not haploid
C. to restore the diploid number of chromosomes
Answer: I think it’s C. to restore the diploid number of chromosomes
Explanation:
i don’t have a explanation but i mean if it’s wrong... sorry lol
Which example has the most complex level of cellular organization?
A. brain
B. muscle
C. bone cell
D. nervous system
A student is breeding beta fish to sell. The original population of fish he uses to start the breeding has a mixture of red fish, blue fish and purple fish. Purple are the most desirable fish. If the student uses selective breeding, which statement best describes how the population of fish will change over time?
Answer:
B
The percent of purple fish in the population will increase and the percent of red fish and blue fish will decrease over several generations.
Explanation:
All changes
saved
4. If you are measuring distance, which of the following prefixes indicate a unit of measure that is larger than the base
unit (meters)? (Choose all that apply)
mega-
kilo-
centi-
giga-
micro-
nano-
Answer:
mega-
kilo-
giga-
Explanation:
The standard unit of distance is in meters. Distance is the length of path covered by a body.
Only mega, kilo and giga are units that are larger than the base unit of distance which is meters.
Mega is of the order 10⁶
Kilo is of the order 10³
giga- is of the order 10⁹
The prefixes below are submultiples:
centi- 10⁻²
micro- 10⁻⁶
nano- 10⁻⁹
NEED HELP QUICK!!!!
Which of the following statements about the structure of DNA is true?
A) It contains adenine, uracil, guanine, cytosine, and phosphorus.
B) It is composed of phosphates, nitrogenous bases, and ribose sugars.
C) It is composed of a single strand that consists of deoxyribose and phosphate.
D) It contains adenine, thymine, guanine, cytosine, and deoxyribose sugar.
Answer:
D
Explanation:
dna does not contain uracil. (uracil is in RNA)
dna does not have ribose sugars (ribose sugars are in RNA)
dna is not a single strand.
dna contains adenine, thymine, guanine, cytosine, and deoxyribose sugar.
DNA is a double stranded molecule. It has two strands of deoxy ribose sugar and the phosphorus groups where the H and OH bonding is present as well. It contains A,T,C and G. 4th option is correct.
What is the the full form of DNA ?DNA stands for deoxyribonucleic acid. It is made up of nucleic acid comprised with the sugar at which O is removed at the 2nd position.
DNA is double stranded in nature. The strand one of between the two strands where the first is called as template strand and the other one is called as coding strand. DNA copies DNA and the process is called as replication. DNA replication unit must have one ori that is origin of replication, promoter that is mostly attached at the 5' end of the strand.
The unit continues to add on bases in order to make the strand until the synthesis is complete. The nitrogenous bases of DNA are A,T,C and G where A stands for adenine, T for thymine, C for cytosine and G for guanine.
Therefore only option D is correct.
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PLEASE HELP ME MARKING BRAINIEST ITS ABOUT SCIENCE
Discuss what you recall about physical and chemical changes. Generate a list of evidence that would indicate a chemical change has occurred.
Answer:
physical changes only change the appearance of a substance
chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Explanation:
physical change: breaking a glass and chopping wood.
chemical change:food cooking and temperature change
In tomatoes, the following hypothetical pathway gives rise to different fruit colors. Y gene R gene Precursor substrate Intermediate substrate Product and lacks color and fruit is and fruit is yellow fruit is red green from chlorophyll Mutations in the genes for both of the enzymes produce lack-of-function, recessive alleles. What would be the expected genotypic and phenotypic segregation ratios if you self-fertilize a RrYy individual
Answer:
Explanation:
From the information given:
The analysis of the hypothetical pathway gives:
Y gene R gene
Green fruit → Yellow fruit → Red fruit.
If RrYy undergoes self-fertilization, the expected genotypic and phenotypic segregation is:
RrYy × RrYy
The progenitors to undergo the segregation are as follows:
RY Ry rY ry
RY RRYY RRYy RrYY RrYy
(red) (red) (red) (red)
Ry RRYy RRyy RrYy Rryy
(red) (green) (red) (green)
rY RrYY RrYy rrYY rrYy
(red) (red) (yellow) (yellow)
ry RrYy Rryy rrYy rryy
(red) (green) (yellow) (green)
Thus; the expected phenotypic ratio is:
= 9(red) : 3(yellow) : 4(green)
The expected phenotypic ratio is:
= 1(RRYY): 2(RRYy): 2(RrYY): 4(RrYy): 1(RRyy): 2(Rryy): 1(rrYY): 2(rrYy): 1(rryy)
Help me plz. Reeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
I think oxygen
Explanation:
On Earth, what process generates most of the water vapor?
Answer:
Evaporation
Explanation:
Which of the following molecules are needed for photosynthesis?
Answer:
Carbon dioxide and oxygen is needed for photosynthesis, and water if you have the choice.
Explanation:
The molecules needed for photosynthesis are carbon dioxide and water.
What is photosynthesis?Photosynthesis is a process performed by green plants where they are able to synthesize their own food material from inorganic material using sunlight.
Photo - light and synthesis - to make. So the word photosynthesis means to "make something using light".
In green plants, the mesophyll cells of the leaves contain a green pigment called chlorophyll. It is present in the grana of their chloroplast. The chloroplast is thus the site for photosynthesis.
The inorganic matter required for photosynthesis is obtained from the environment. The carbon dioxide is obtained from the atmosphere by the stomata and water is absorbed by the roots.
The chlorophyll traps the sunlight which provides the energy for the hydrolysis of water and the formation of glucose and oxygen as a byproduct.
Therefore, the molecules required for photosynthesis are carbon dioxide and water.
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Which protist is characterized by a pseudopod?
Answer:
if you're taking the unit test the answer is sarcodine
Explanation:
The practice of science can answer only scientific questions. And scientific
questions guide the design of investigations. What is usually true of the
possible answers to a scientific question?
A. They can lead to additional questions about the phenomenon.
B. They overturn an established scientific theory.
OC. They lead to the discovery of.a new scientfic law.
OD. They remove the need for further scientific inquiry.
Answer:
A scientific question is usually guided by a hypothesis which can lead to additional questing about the phenomenon (A).
Please rate positive and give brainlist for future help!
Explanation:
A scientific question can lead to additional questions about the phenomenon. The correct option is A.
What is a scientific question?A scientific question is one that could result in a hypothesis and assist us in determining the cause of an observation.
A good scientific hypothesis must be verifiable and quantifiable. You can perform an experiment to find the solution. eschews all opinions of any type.
A scientific question is testable, to put it simply. A testable inquiry is one that focuses on things, creatures, or occurrences in our immediate environment.
By examining quantifiable data and supporting evidence, it can be resolved by experimentation, observation, or other data collection methods.
A scientific query can spawn more inquiries into the phenomenon.
Thus, the correct option is A.
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The bullfrog, Rana catesbeiana, is most closely related to
Answer: It is most related to a spotted chorus frog
I hope this helps, and Happy Holidays! :)
Answer:
The bullfrog, Rana catesbeiana, is most closely related to the spotted chorus frog, Pseudacris clarki Asian flying frog, Polypedates leucomystax.
Elephants shape their environment in many ways. They can change a forest to a grassy field or dig a hole that might become a pond. They clear large amounts of vegetation, which removes habitats for some organisms but makes the area inviting for other organisms. Which best describes possible interactions of elephants with the surrounding
ecosystem?
A) positive
B) negative
C) neither positive nor negative
D) both positive and negative
Answer:
The Answer is D (Both Positive and Negative) I hope this helps.
Explanation:
Answer:
d)both positive and negative
Explanation:
edge 2020 pls mark brainliest
Select the best answers from the drop-down menus.
The
nerves control the muscles in the arms, shoulders, and neck.
The
nerves control the muscles in the abdomen and chest.
The
nerves control the muscles in the lower back, legs, and feet.
Answer:
nerves control the muscles in abdomen and chest
Answer:
The ✔ cervical nerves control the muscles in the arms, shoulders, and neck. The ✔ thoracic nerves control the muscles in the abdomen and chest.
The ✔ lumbar nerves control the muscles in the lower back, legs, and feet.
Explanation:
What is genotype for a recessive trait found on the female chromosome
Answer:
The genotype for a recessive trait found on the female is XH.
Explanation:
name any method used in classifying soil into Sandy, clay and loam?
Answer:
SOIL TEXTURE?
What living thing is made up of photographed cells above?
Answer:
Organs work together to form organ systems. Multicellular organisms—such as humans—are made up of many cells. The cells in multicellular organisms may be specialized to do different jobs and are organized into tissues, such as connective tissue, epithelial tissue, muscle, and nervous tissue.
Explanation:
Brainliest please?
Which BEST describes why certain traits led to an increased frequency within the population of medium ground finches?
A
because the traits were acquired
B
because the traits were favorable
C
because the traits were inherited
D
because the traits were mutations
Write a sentence about earthworms, using the words, exposure and hydrated.
Earthworms like staying under dirt because it shields their delicate bodies from exposure. Earthworms have no defensive shell or strong skin so they stay in dampness. The moist, cool earth keeps the worms hydrated.
Two yeast cells were placed into a special container to which food was continually added, to keep it at a constant concentration. All other factors were set for optimal yeast growth (for example, temperature, oxygen, and pH). The population was sampled every hour for 21 hours and the results of the estimated population size were recorded in the table below.
Answer:
Answer to Two yeast cells were placed into a special container to which food was continually ... All Other Factors Were Set For Optimal Yeast Growth (for Example, ... The Population Was Sampled Every Hour For 21 Hours And The Results Of The ... to which food was continually added, to keep it at a constant concentration.
Explanation:
Answer to Two yeast cells were placed into a special container to which food was continually ... All Other Factors Were Set For Optimal Yeast Growth (for Example, ... The Population Was Sampled Every Hour For 21 Hours And The Results Of The ... to which food was continually added, to keep it at a constant concentration.
According to the cell theory, which describes cells? All organisms are composed of multiple cells. All cells haveAccording to the cell theory, which describes cells?
All organisms are composed of multiple cells.
All cells have the same structure and function.
Cells are found in everything on Earth.
All living cells come from other living cells. the same structure and function. Cells are found in everything on Earth. All living cells come from other living cells.
Answer: All living cells come from other living cells.
Explanation: That is told in the cell theory. The last option.
HELP! WILL GIVE BRANLIEST!
(Both questions 17 and 18)
EXTRA POINTS TOO
Answer:
For question 18 i think the answer is (B) becasue the cell membrane is the wall of a cell and so in a bank it would be the security guard. Then for question 17 its either B or C.
Explanation:
discuss the adaptations enabling the move of charophyte algea to land
Explain how trees can be producers and yet the smalest trophíc level in a pyramid of nurnbers
Answer:
they give food to animals as well as human all so
Answer:
This is because there may be one large producer or a small number of very large producers. For example, adult oak trees are extremely large and a single one may be home to hundreds of organisms. Thus, the number of organisms in the lower level of the pyramid of numbers will be less.
Explanation:
The chemical reaction of water and carbon dioxide to form sugar is ... reaction in terms of molecules.
__________ fabric wrinkles less than ____________ fabric.
Linen, synthetic
Jute, Synthetic
Cotton, synthetic
Synthetic, cotton
Answer:
the answer to this question is option C mark me as brainliest