Plz help im desprate
What is base pairing? (and Chargaff's rule)?
Answer:
A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G).
Explanation:
Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine. This pattern is found in both strands of the DNA.
Plant cells have a square shape
True or False
How many atoms does the formula Mg3(PO4)2 have?
Answer: time all the number together and you will got it.
Explanation:
20.
Which of the following is a function of a carbohydrate?
A.
Forms the plant cell wall
B.
Insulation
C
Gene expression
D.
Regulates enzymes
Answer:
The correct answer is A.) Forms the plant cell wall.
Answer:
answer is A :) hope this helps
What’s the difference between budding, parthenogenesis give two examples?
Scientist observed an organism X and noted down the mode of nutrition as follows X secretes enzymes outside its body and digests food with these enzymes. It then absorbs the digested food. Which organism was observed by the scientist?
Answer:
Hydra
Explanation:
The mode of nutrition being described in this question is EXTRACELLULAR DIGESTION, in which a food substance is chemically broken down externally. The organisms being portrayed is HYDRA. Hydra is an animal that secretes digestive enzymes that work on the food extracellularly (outside the organism), then absorb the digested food.
Therefore, the organism X observed by the scientist whose mode of nutrition is to secrete enzymes outside its body and digests food with these enzymes, then absorbs the digested food is the HYDRA.
Over the last 200 years, scientists have increased their knowledge of how to use chemicals to create medicines. What is one result of this trend?
Humans now have a longer life expectancy.
Humans are no longer at risk of serious diseases.
Medicines that use chemicals no longer have side effects.
Medicines that use chemicals are now less powerful. GIVING BRAINLIEST
Answer:
A. Humans have a longer life expectancy
Explanation:
Took the quiz
pls help will mark brainliest
Answer:
do it as biggest to smallest, cells from the start and the balls towards the end.
Explanation:
Under what circumstances can twins be born in humans?
Question 1
Which of the students' observations will be most helpful in classifying a cell as either prokaryotic or eukaryotic?
Answer:
Explanation:
I can't answer this because there are no options given
Describe the function of the following
organelles:
a. Nucleus-
b. Cell membrane-
c. Chloroplasts-
d. Cell Wall-
e. Cytoplasm-
Answer:
Explanation:
The nucleus is the part of the cell that controls all other functions of the cell and the organelles. It also contains DNA.
The cell membrane acts as a semipermeable barrier between the cell and the outside environment to facilitate active and passive diffusion, and to maintain the concentration of solutes inside the cytoplasm. It also has receptors on its outer surface to communicate with other cells.
Chloroplasts use energy from photons of light from the sun to undergo photosynthesis, which helps the cells create glucose, or in other words, make its own food (in plants).
The cell wall protects plant cells from antigens and, due to its boxy shape, also helps the plant have a more rigid structure so that plants can stand upright.
The cytoplasm of a cell is the fluid within the cell membrane through which organelles in the cell move around. It is also the location where glycolysis typically takes place. The cytoplasm is mostly water with salts dissolved into it.
In the Picture above.
Answer:
A fossil fuels
Explanation:
fossil fuels are Americas biggest energy producers we use things like coal, natural gas, and petroleum
Explain convection in earths mantle
Answer:
Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface.
Explanation:
What is the conclusion that Morgan concluded from his
experiment using the fruit flies?
Answer:
What is the conclusion that Morgan concluded from his
experiment using the fruit flies?
The process by which organisms keep everything inside their bodies within certain limits is called
Group of answer choices
Answer:
is metabolism the correct answer?
Explanation:
homeostasis
homeostasis
DNA: G-A-T-C-A-A-T-C-G mRNA:?
Answer:
cocktails shall susi rush ayah this such thru ducks TDD
Answer:
what's the question plsss??
Explain why a scientist should or should not change a theory based on one experiment?
Answer:
Because one experiment could be a fail but if you try it again it could possibly work out
Explanation:
Can you use mass alone to predict whether an object will sink or float? Explain.
Answer:
No, you need both mass and volume to determine its desity to see if it can float.
Explanation:
Density is the only thing affecting whether something floats or sinks. If an object has a higher density than the fluid it is in (fluid can mean liquid or gas), it will sink. If it has a lower density, it will float. Density is determined by an object's mass and volume.
The children in a middle school classroom are all exposed to chicken pox one week. Among these students are John, who had chicken pox when he was much younger, and Sara, who has never had chicken pox. Which student do you expect would be less likely to become ill with chicken pox following this exposure and why? (5 points) John: he has naturally acquired active immunity to chicken pox from his previous exposure. Sara: she has naturally acquired passive immunity to chicken pox from exposure to other students. John: the pathogens that cause chicken pox will no longer be able to enter his body. Sara: since she has not suffered from chicken pox, her immune system is probably stronger than Johns.
Answer:
John: he has naturally acquired active immunity to chicken pox from previous exposure.
Explanation:
Your body naturally has some immunity to things that aren't you, but when you get sick with a specific pathogen, your body begins to make antibodies that specifically recognize that pathogen. Each antibody only recognizes one pathogen, and it floats around waiting to find it again so it can tell your body to kill it before you get sick again. This is why we become immune to chicken pox; after the first time you beat it, your body has the labeled antibodies and it can quickly destroy the pathogen before you get sick again.
Answer:
John: he has naturally acquired active immunity to chicken pox from his previous exposure.
Explanation:
Ok, I know this is incredibly late and doesn't matter anymore, but I just wanna say that the person before me was correct. I just took the test and this was the correct answer.
Fats, oils and cholesterol are all types of what?
A cell membranes
B. hormones
C. lipids
D. fatty acids
Answer:
lipids is the answer of your question
Answer:
Lipids!
Explanation:
Lipids give us the energy to run, walk, and play! Lipids are stored in our bodies for maximum energy. Lipids come from meat, pastries, and other delicious goodies! However, too much lipids can be unhealthy so a balanced diet is a must!
10. What do limiting factors control?
A.the size of an organism
B.the size of an ecosystem
C.the size of a habitat
D.the size of a population
Answer:
D.the size of a population
Explanation:
Hope I am right
explain the ph scale. Include the range for acids, bases and neutral substances
The concentration of the solute in the solution is lower than the concentration inside the cell
When a cell is placed in this solution, more water enters the cell than it leaves it
The concentration of the solute in the solution is higher than the concentration inside the cell
The concentration of the solute in the solution is the same as in the cell
Causes water to move across the cell membrane
Causes a cell to swell
When a cell is placed in this solution, more water will leave the cell than it enters it
Doesn’t change the shape of a cell as the same amount of water enters and leaves the cell
Hypotonic Solution
Isotonic Solution
Hypertonic Solution
Answer:
n The Diary of Anne Frank, the conflict between Peter and Mr. Dussel about Mr. Dussel’s unkind words to Peter’s mother supports the theme that
wartime often brings out the worst in people.
children always tend to defend their parents.
difficult times tend to tear friendships apart.
people are not always as they appear to be.
Explanation:
n The Diary of Anne Frank, the conflict between Peter and Mr. Dussel about Mr. Dussel’s unkind words to Peter’s mother supports the theme that
wartime often brings out the worst in people.
children always tend to defend their parents.
difficult times tend to tear friendships apart.
people are not always as they appear to be.
BRAINLIEST IF CORRECT 50 POINTS
Which best describes the sporophyte of a tree?
It is very small and is not seen
It is the dominant plant.
It becomes the seed.
It produces the egg and the sperm.
Answer:
The last answer (It produces the egg and the sperm)
How does the process of gel electrophoresis produce DNA fingerprints? An electric current sorts DNA nucleotides according to their bases. O An electric current cuts a DNA strand into segments of various lengths O An electric current causes segments of DNA to move at different rates O An electric current supplies a charge to uncharged segments of DNA
Answer:
Gel electrophoresis
Explanation:
Gel electrophoresis is a technique used to separate DNA fragments according to their size. DNA samples are loaded into wells (indentations) at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode.
please help :( (Energy Pyramid)
Answer:
Energy go brrrrrrrr
Explanation: If the producers (the grass) starts out with 10,000 units of energy then we can just subtract a 0 each time. So when the rabbit consumes the grass now theres only 1000 units of energy. When the snake eats the rabbit theres only 100 units. So the answer is 100 units
A scientist wants to increase the chance of pregnancy in mice. He gives the mice a hormone that
causes them to produce more gametes. Which of the following statements justifies which process
the cells went through after the hormone injections?
GROUP OF CHOICES
Mitosis because more cells will be produced at a faster rate.
Mitosis, because daughter cells genetically identical to the parent cell are needed for reproduction.
Meiosis, because the cells produced need to be diploid rather than haploid
Meiosis since it produces haploid cells needed for reproduction.
Answer:
Meiosis since it produces gametes needed for reproduction
Explanation:
BRAINLIEST!!! How is glucose related to carbohydrates?
Answer:
When carbohydrates are digested and sent into the blood stream they become sugars called glucose. Glucose provides energy for all of your cells. If not all of the glucose is used immediately, your body will store it in your muscles and liver as glycogen. Glucose is a type of sugar found in food.
Explanation:
Explanation:
carbs are made up of glucose
which two body systems interact to expel the waste product carbon dioxide
a urinary system
b nervous system
c excretory system
d circulatory system
Answer:
excretory system and circulatory system
Explanation:
Blood is part of circulatory system and as it move through various organs it exchanges the gases i.e give oxygen to the cell and take carbon dioxide from them. After taking CO2, the blood becomes impure and hence it passes through the kidney before going to the heart. Kidney is part of excretory system which removes carbon dioxide from blood and thus purifies it.